./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec27_product30.cil.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_2e1c027c-5ef2-4603-8687-914ac0a3295a/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e1c027c-5ef2-4603-8687-914ac0a3295a/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_2e1c027c-5ef2-4603-8687-914ac0a3295a/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e1c027c-5ef2-4603-8687-914ac0a3295a/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec27_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e1c027c-5ef2-4603-8687-914ac0a3295a/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_2e1c027c-5ef2-4603-8687-914ac0a3295a/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 77340ea3311b00efe6580b7964ad9e7e4d288fea0ba2d6706c8abdac4c4c4bb5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:47:45,454 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:47:45,456 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:47:45,496 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:47:45,497 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:47:45,499 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:47:45,500 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:47:45,503 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:47:45,505 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:47:45,506 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:47:45,507 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:47:45,509 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:47:45,509 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:47:45,511 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:47:45,513 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:47:45,521 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:47:45,525 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:47:45,527 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:47:45,529 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:47:45,533 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:47:45,536 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:47:45,542 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:47:45,544 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:47:45,546 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:47:45,550 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:47:45,555 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:47:45,556 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:47:45,557 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:47:45,559 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:47:45,560 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:47:45,561 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:47:45,562 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:47:45,564 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:47:45,566 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:47:45,567 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:47:45,567 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:47:45,568 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:47:45,569 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:47:45,569 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:47:45,570 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:47:45,571 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:47:45,572 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e1c027c-5ef2-4603-8687-914ac0a3295a/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:47:45,619 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:47:45,619 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:47:45,620 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:47:45,621 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:47:45,623 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:47:45,623 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:47:45,623 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:47:45,624 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:47:45,624 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:47:45,624 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:47:45,625 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:47:45,626 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:47:45,626 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:47:45,626 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:47:45,626 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:47:45,627 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:47:45,627 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:47:45,627 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:47:45,627 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:47:45,628 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:47:45,628 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:47:45,628 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:47:45,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:47:45,629 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:47:45,629 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:47:45,629 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:47:45,629 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:47:45,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:47:45,630 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:47:45,632 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:47:45,632 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:47:45,632 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:47:45,633 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_2e1c027c-5ef2-4603-8687-914ac0a3295a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e1c027c-5ef2-4603-8687-914ac0a3295a/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 77340ea3311b00efe6580b7964ad9e7e4d288fea0ba2d6706c8abdac4c4c4bb5 [2021-11-02 22:47:45,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:47:45,928 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:47:45,931 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:47:45,932 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:47:45,933 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:47:45,934 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e1c027c-5ef2-4603-8687-914ac0a3295a/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/product-lines/email_spec27_product30.cil.c [2021-11-02 22:47:46,015 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e1c027c-5ef2-4603-8687-914ac0a3295a/bin/uautomizer-tBqnrhUYjU/data/2ae050125/76bd9d7dc60b468aa8e7baec14d1148f/FLAG0d8e56337 [2021-11-02 22:47:46,661 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:47:46,662 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e1c027c-5ef2-4603-8687-914ac0a3295a/sv-benchmarks/c/product-lines/email_spec27_product30.cil.c [2021-11-02 22:47:46,697 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e1c027c-5ef2-4603-8687-914ac0a3295a/bin/uautomizer-tBqnrhUYjU/data/2ae050125/76bd9d7dc60b468aa8e7baec14d1148f/FLAG0d8e56337 [2021-11-02 22:47:46,919 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e1c027c-5ef2-4603-8687-914ac0a3295a/bin/uautomizer-tBqnrhUYjU/data/2ae050125/76bd9d7dc60b468aa8e7baec14d1148f [2021-11-02 22:47:46,922 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:47:46,923 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:47:46,925 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:47:46,925 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:47:46,928 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:47:46,929 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:47:46" (1/1) ... [2021-11-02 22:47:46,931 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e172338 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:47:46, skipping insertion in model container [2021-11-02 22:47:46,931 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:47:46" (1/1) ... [2021-11-02 22:47:46,939 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:47:47,031 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:47:47,582 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_2e1c027c-5ef2-4603-8687-914ac0a3295a/sv-benchmarks/c/product-lines/email_spec27_product30.cil.c[47628,47641] [2021-11-02 22:47:47,696 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:47:47,708 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:47:47,818 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_2e1c027c-5ef2-4603-8687-914ac0a3295a/sv-benchmarks/c/product-lines/email_spec27_product30.cil.c[47628,47641] [2021-11-02 22:47:47,862 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:47:47,911 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:47:47,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:47:47 WrapperNode [2021-11-02 22:47:47,913 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:47:47,914 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:47:47,914 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:47:47,914 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:47:47,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:47:47" (1/1) ... [2021-11-02 22:47:47,982 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:47:47" (1/1) ... [2021-11-02 22:47:48,092 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:47:48,093 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:47:48,093 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:47:48,094 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:47:48,102 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:47:47" (1/1) ... [2021-11-02 22:47:48,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:47:47" (1/1) ... [2021-11-02 22:47:48,123 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:47:47" (1/1) ... [2021-11-02 22:47:48,123 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:47:47" (1/1) ... [2021-11-02 22:47:48,171 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:47:47" (1/1) ... [2021-11-02 22:47:48,218 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:47:47" (1/1) ... [2021-11-02 22:47:48,224 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:47:47" (1/1) ... [2021-11-02 22:47:48,238 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:47:48,247 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:47:48,247 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:47:48,248 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:47:48,249 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:47:47" (1/1) ... [2021-11-02 22:47:48,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:47:48,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e1c027c-5ef2-4603-8687-914ac0a3295a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:47:48,285 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e1c027c-5ef2-4603-8687-914ac0a3295a/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:47:48,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e1c027c-5ef2-4603-8687-914ac0a3295a/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:47:48,325 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-02 22:47:48,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:47:48,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:47:48,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:47:48,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:47:50,523 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:47:50,524 INFO L299 CfgBuilder]: Removed 323 assume(true) statements. [2021-11-02 22:47:50,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:47:50 BoogieIcfgContainer [2021-11-02 22:47:50,528 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:47:50,530 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:47:50,530 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:47:50,534 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:47:50,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:47:46" (1/3) ... [2021-11-02 22:47:50,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cd0e9be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:47:50, skipping insertion in model container [2021-11-02 22:47:50,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:47:47" (2/3) ... [2021-11-02 22:47:50,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cd0e9be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:47:50, skipping insertion in model container [2021-11-02 22:47:50,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:47:50" (3/3) ... [2021-11-02 22:47:50,539 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec27_product30.cil.c [2021-11-02 22:47:50,546 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:47:50,546 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-02 22:47:50,619 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:47:50,632 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 22:47:50,633 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-02 22:47:50,664 INFO L276 IsEmpty]: Start isEmpty. Operand has 523 states, 520 states have (on average 1.7653846153846153) internal successors, (918), 522 states have internal predecessors, (918), 0 states have call successors, (0), 0 states 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 22:47:50,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-02 22:47:50,682 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:47:50,683 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:47:50,684 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:47:50,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:47:50,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1232814721, now seen corresponding path program 1 times [2021-11-02 22:47:50,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:47:50,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538120027] [2021-11-02 22:47:50,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:47:50,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:47:50,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:51,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:47:51,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:47:51,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538120027] [2021-11-02 22:47:51,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538120027] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:47:51,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:47:51,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:47:51,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225260989] [2021-11-02 22:47:51,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:47:51,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:47:51,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:47:51,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:47:51,234 INFO L87 Difference]: Start difference. First operand has 523 states, 520 states have (on average 1.7653846153846153) internal successors, (918), 522 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states 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 22:47:51,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:47:51,440 INFO L93 Difference]: Finished difference Result 1534 states and 2696 transitions. [2021-11-02 22:47:51,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:47:51,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 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 62 [2021-11-02 22:47:51,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:47:51,473 INFO L225 Difference]: With dead ends: 1534 [2021-11-02 22:47:51,473 INFO L226 Difference]: Without dead ends: 992 [2021-11-02 22:47:51,484 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 22:47:51,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2021-11-02 22:47:51,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 505. [2021-11-02 22:47:51,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 503 states have (on average 1.753479125248509) internal successors, (882), 504 states have internal predecessors, (882), 0 states have call successors, (0), 0 states 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 22:47:51,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 882 transitions. [2021-11-02 22:47:51,599 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 882 transitions. Word has length 62 [2021-11-02 22:47:51,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:47:51,601 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 882 transitions. [2021-11-02 22:47:51,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states 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 22:47:51,601 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 882 transitions. [2021-11-02 22:47:51,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-02 22:47:51,612 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:47:51,612 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:47:51,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:47:51,613 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:47:51,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:47:51,616 INFO L85 PathProgramCache]: Analyzing trace with hash -2071876332, now seen corresponding path program 1 times [2021-11-02 22:47:51,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:47:51,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208580422] [2021-11-02 22:47:51,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:47:51,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:47:51,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:51,801 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 22:47:51,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:47:51,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208580422] [2021-11-02 22:47:51,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208580422] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:47:51,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:47:51,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:47:51,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470239819] [2021-11-02 22:47:51,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:47:51,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:47:51,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:47:51,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:47:51,808 INFO L87 Difference]: Start difference. First operand 505 states and 882 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states 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 22:47:52,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:47:52,025 INFO L93 Difference]: Finished difference Result 1464 states and 2562 transitions. [2021-11-02 22:47:52,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:47:52,026 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2021-11-02 22:47:52,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:47:52,036 INFO L225 Difference]: With dead ends: 1464 [2021-11-02 22:47:52,036 INFO L226 Difference]: Without dead ends: 978 [2021-11-02 22:47:52,038 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:47:52,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2021-11-02 22:47:52,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 505. [2021-11-02 22:47:52,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 503 states have (on average 1.7514910536779325) internal successors, (881), 504 states have internal predecessors, (881), 0 states have call successors, (0), 0 states 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 22:47:52,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 881 transitions. [2021-11-02 22:47:52,082 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 881 transitions. Word has length 64 [2021-11-02 22:47:52,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:47:52,083 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 881 transitions. [2021-11-02 22:47:52,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states 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 22:47:52,083 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 881 transitions. [2021-11-02 22:47:52,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-02 22:47:52,085 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:47:52,085 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:47:52,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:47:52,087 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:47:52,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:47:52,093 INFO L85 PathProgramCache]: Analyzing trace with hash 910925921, now seen corresponding path program 1 times [2021-11-02 22:47:52,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:47:52,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128234210] [2021-11-02 22:47:52,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:47:52,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:47:52,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:52,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:47:52,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:47:52,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128234210] [2021-11-02 22:47:52,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128234210] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:47:52,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:47:52,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:47:52,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421115496] [2021-11-02 22:47:52,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:47:52,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:47:52,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:47:52,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:47:52,215 INFO L87 Difference]: Start difference. First operand 505 states and 881 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states 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 22:47:52,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:47:52,258 INFO L93 Difference]: Finished difference Result 992 states and 1736 transitions. [2021-11-02 22:47:52,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:47:52,258 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-11-02 22:47:52,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:47:52,262 INFO L225 Difference]: With dead ends: 992 [2021-11-02 22:47:52,262 INFO L226 Difference]: Without dead ends: 510 [2021-11-02 22:47:52,264 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 22:47:52,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-11-02 22:47:52,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 505. [2021-11-02 22:47:52,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 503 states have (on average 1.7455268389662029) internal successors, (878), 504 states have internal predecessors, (878), 0 states have call successors, (0), 0 states 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 22:47:52,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 878 transitions. [2021-11-02 22:47:52,287 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 878 transitions. Word has length 65 [2021-11-02 22:47:52,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:47:52,287 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 878 transitions. [2021-11-02 22:47:52,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states 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 22:47:52,288 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 878 transitions. [2021-11-02 22:47:52,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-02 22:47:52,289 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:47:52,290 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:47:52,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:47:52,290 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:47:52,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:47:52,291 INFO L85 PathProgramCache]: Analyzing trace with hash -649267268, now seen corresponding path program 1 times [2021-11-02 22:47:52,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:47:52,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142737906] [2021-11-02 22:47:52,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:47:52,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:47:52,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:52,460 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 22:47:52,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:47:52,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142737906] [2021-11-02 22:47:52,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142737906] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:47:52,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:47:52,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:47:52,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097117916] [2021-11-02 22:47:52,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:47:52,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:47:52,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:47:52,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:47:52,470 INFO L87 Difference]: Start difference. First operand 505 states and 878 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 22:47:52,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:47:52,633 INFO L93 Difference]: Finished difference Result 1454 states and 2542 transitions. [2021-11-02 22:47:52,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:47:52,634 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2021-11-02 22:47:52,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:47:52,641 INFO L225 Difference]: With dead ends: 1454 [2021-11-02 22:47:52,641 INFO L226 Difference]: Without dead ends: 976 [2021-11-02 22:47:52,643 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:47:52,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-11-02 22:47:52,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 505. [2021-11-02 22:47:52,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 503 states have (on average 1.7435387673956262) internal successors, (877), 504 states have internal predecessors, (877), 0 states have call successors, (0), 0 states 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 22:47:52,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 877 transitions. [2021-11-02 22:47:52,674 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 877 transitions. Word has length 67 [2021-11-02 22:47:52,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:47:52,676 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 877 transitions. [2021-11-02 22:47:52,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 22:47:52,677 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 877 transitions. [2021-11-02 22:47:52,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-02 22:47:52,679 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:47:52,679 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:47:52,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 22:47:52,680 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:47:52,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:47:52,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1554239583, now seen corresponding path program 1 times [2021-11-02 22:47:52,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:47:52,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705571517] [2021-11-02 22:47:52,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:47:52,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:47:52,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:52,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:47:52,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:47:52,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705571517] [2021-11-02 22:47:52,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705571517] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:47:52,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:47:52,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:47:52,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537239543] [2021-11-02 22:47:52,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:47:52,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:47:52,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:47:52,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:47:52,793 INFO L87 Difference]: Start difference. First operand 505 states and 877 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states 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 22:47:52,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:47:52,968 INFO L93 Difference]: Finished difference Result 1459 states and 2546 transitions. [2021-11-02 22:47:52,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:47:52,968 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-11-02 22:47:52,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:47:52,976 INFO L225 Difference]: With dead ends: 1459 [2021-11-02 22:47:52,976 INFO L226 Difference]: Without dead ends: 981 [2021-11-02 22:47:52,977 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:47:52,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2021-11-02 22:47:53,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 505. [2021-11-02 22:47:53,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 503 states have (on average 1.7415506958250497) internal successors, (876), 504 states have internal predecessors, (876), 0 states have call successors, (0), 0 states 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 22:47:53,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 876 transitions. [2021-11-02 22:47:53,014 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 876 transitions. Word has length 68 [2021-11-02 22:47:53,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:47:53,014 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 876 transitions. [2021-11-02 22:47:53,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states 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 22:47:53,015 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 876 transitions. [2021-11-02 22:47:53,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-02 22:47:53,016 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:47:53,016 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:47:53,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 22:47:53,017 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:47:53,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:47:53,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1696413047, now seen corresponding path program 1 times [2021-11-02 22:47:53,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:47:53,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427700774] [2021-11-02 22:47:53,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:47:53,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:47:53,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:53,094 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 22:47:53,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:47:53,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427700774] [2021-11-02 22:47:53,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427700774] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:47:53,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:47:53,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:47:53,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359331869] [2021-11-02 22:47:53,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:47:53,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:47:53,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:47:53,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:47:53,098 INFO L87 Difference]: Start difference. First operand 505 states and 876 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states 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 22:47:53,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:47:53,137 INFO L93 Difference]: Finished difference Result 772 states and 1328 transitions. [2021-11-02 22:47:53,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:47:53,137 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-11-02 22:47:53,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:47:53,141 INFO L225 Difference]: With dead ends: 772 [2021-11-02 22:47:53,142 INFO L226 Difference]: Without dead ends: 508 [2021-11-02 22:47:53,142 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 22:47:53,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-11-02 22:47:53,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 507. [2021-11-02 22:47:53,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 505 states have (on average 1.7386138613861386) internal successors, (878), 506 states have internal predecessors, (878), 0 states have call successors, (0), 0 states 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 22:47:53,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 878 transitions. [2021-11-02 22:47:53,174 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 878 transitions. Word has length 69 [2021-11-02 22:47:53,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:47:53,174 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 878 transitions. [2021-11-02 22:47:53,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states 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 22:47:53,175 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 878 transitions. [2021-11-02 22:47:53,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-02 22:47:53,176 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:47:53,176 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-02 22:47:53,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 22:47:53,177 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:47:53,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:47:53,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1972260837, now seen corresponding path program 1 times [2021-11-02 22:47:53,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:47:53,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427522270] [2021-11-02 22:47:53,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:47:53,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:47:53,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:53,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:47:53,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:47:53,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427522270] [2021-11-02 22:47:53,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427522270] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:47:53,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:47:53,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:47:53,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231747835] [2021-11-02 22:47:53,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:47:53,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:47:53,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:47:53,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:47:53,244 INFO L87 Difference]: Start difference. First operand 507 states and 878 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 22:47:53,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:47:53,314 INFO L93 Difference]: Finished difference Result 1407 states and 2458 transitions. [2021-11-02 22:47:53,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:47:53,315 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 22:47:53,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:47:53,321 INFO L225 Difference]: With dead ends: 1407 [2021-11-02 22:47:53,321 INFO L226 Difference]: Without dead ends: 931 [2021-11-02 22:47:53,323 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 22:47:53,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2021-11-02 22:47:53,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 667. [2021-11-02 22:47:53,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 665 states have (on average 1.7609022556390976) internal successors, (1171), 666 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states 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 22:47:53,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1171 transitions. [2021-11-02 22:47:53,373 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1171 transitions. Word has length 77 [2021-11-02 22:47:53,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:47:53,373 INFO L470 AbstractCegarLoop]: Abstraction has 667 states and 1171 transitions. [2021-11-02 22:47:53,373 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 22:47:53,374 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1171 transitions. [2021-11-02 22:47:53,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-02 22:47:53,375 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:47:53,376 INFO L513 BasicCegarLoop]: trace histogram [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 22:47:53,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 22:47:53,376 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:47:53,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:47:53,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1586972284, now seen corresponding path program 1 times [2021-11-02 22:47:53,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:47:53,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871228969] [2021-11-02 22:47:53,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:47:53,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:47:53,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:53,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:47:53,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:47:53,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871228969] [2021-11-02 22:47:53,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871228969] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:47:53,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:47:53,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:47:53,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123530270] [2021-11-02 22:47:53,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:47:53,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:47:53,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:47:53,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:47:53,461 INFO L87 Difference]: Start difference. First operand 667 states and 1171 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:47:53,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:47:53,829 INFO L93 Difference]: Finished difference Result 1931 states and 3419 transitions. [2021-11-02 22:47:53,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:47:53,830 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-02 22:47:53,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:47:53,839 INFO L225 Difference]: With dead ends: 1931 [2021-11-02 22:47:53,839 INFO L226 Difference]: Without dead ends: 1295 [2021-11-02 22:47:53,841 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:47:53,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1295 states. [2021-11-02 22:47:53,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1295 to 667. [2021-11-02 22:47:53,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 665 states have (on average 1.7578947368421052) internal successors, (1169), 666 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states 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 22:47:53,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1169 transitions. [2021-11-02 22:47:53,900 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1169 transitions. Word has length 78 [2021-11-02 22:47:53,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:47:53,900 INFO L470 AbstractCegarLoop]: Abstraction has 667 states and 1169 transitions. [2021-11-02 22:47:53,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:47:53,901 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1169 transitions. [2021-11-02 22:47:53,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-02 22:47:53,903 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:47:53,903 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-02 22:47:53,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 22:47:53,903 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:47:53,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:47:53,904 INFO L85 PathProgramCache]: Analyzing trace with hash 413167387, now seen corresponding path program 1 times [2021-11-02 22:47:53,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:47:53,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489943571] [2021-11-02 22:47:53,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:47:53,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:47:53,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:53,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:47:53,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:47:53,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489943571] [2021-11-02 22:47:53,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489943571] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:47:53,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:47:53,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:47:53,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614450546] [2021-11-02 22:47:53,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:47:53,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:47:53,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:47:53,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:47:53,971 INFO L87 Difference]: Start difference. First operand 667 states and 1169 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 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 22:47:54,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:47:54,085 INFO L93 Difference]: Finished difference Result 1929 states and 3411 transitions. [2021-11-02 22:47:54,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:47:54,085 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 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 79 [2021-11-02 22:47:54,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:47:54,094 INFO L225 Difference]: With dead ends: 1929 [2021-11-02 22:47:54,094 INFO L226 Difference]: Without dead ends: 1293 [2021-11-02 22:47:54,096 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 22:47:54,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2021-11-02 22:47:54,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 1029. [2021-11-02 22:47:54,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1027 states have (on average 1.7838364167478091) internal successors, (1832), 1028 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states 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 22:47:54,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 1832 transitions. [2021-11-02 22:47:54,219 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 1832 transitions. Word has length 79 [2021-11-02 22:47:54,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:47:54,219 INFO L470 AbstractCegarLoop]: Abstraction has 1029 states and 1832 transitions. [2021-11-02 22:47:54,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 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 22:47:54,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 1832 transitions. [2021-11-02 22:47:54,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-02 22:47:54,222 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:47:54,223 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-02 22:47:54,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 22:47:54,223 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:47:54,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:47:54,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1714985017, now seen corresponding path program 1 times [2021-11-02 22:47:54,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:47:54,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155489966] [2021-11-02 22:47:54,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:47:54,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:47:54,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:54,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:47:54,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:47:54,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155489966] [2021-11-02 22:47:54,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155489966] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:47:54,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674316277] [2021-11-02 22:47:54,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:47:54,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:47:54,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e1c027c-5ef2-4603-8687-914ac0a3295a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:47:54,324 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e1c027c-5ef2-4603-8687-914ac0a3295a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:47:54,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e1c027c-5ef2-4603-8687-914ac0a3295a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:47:54,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:54,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:47:54,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:47:54,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:47:54,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674316277] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:47:54,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:47:54,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-02 22:47:54,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011111610] [2021-11-02 22:47:54,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:47:54,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:47:54,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:47:54,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:47:55,000 INFO L87 Difference]: Start difference. First operand 1029 states and 1832 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 22:47:55,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:47:55,118 INFO L93 Difference]: Finished difference Result 1776 states and 3124 transitions. [2021-11-02 22:47:55,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:47:55,145 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 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 79 [2021-11-02 22:47:55,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:47:55,156 INFO L225 Difference]: With dead ends: 1776 [2021-11-02 22:47:55,156 INFO L226 Difference]: Without dead ends: 1512 [2021-11-02 22:47:55,157 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:47:55,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1512 states. [2021-11-02 22:47:55,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1512 to 1245. [2021-11-02 22:47:55,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 1243 states have (on average 1.7876106194690264) internal successors, (2222), 1244 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states 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 22:47:55,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 2222 transitions. [2021-11-02 22:47:55,250 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 2222 transitions. Word has length 79 [2021-11-02 22:47:55,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:47:55,250 INFO L470 AbstractCegarLoop]: Abstraction has 1245 states and 2222 transitions. [2021-11-02 22:47:55,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 22:47:55,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 2222 transitions. [2021-11-02 22:47:55,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-02 22:47:55,253 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:47:55,254 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:47:55,297 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e1c027c-5ef2-4603-8687-914ac0a3295a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-02 22:47:55,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e1c027c-5ef2-4603-8687-914ac0a3295a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-02 22:47:55,468 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:47:55,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:47:55,469 INFO L85 PathProgramCache]: Analyzing trace with hash 591241206, now seen corresponding path program 1 times [2021-11-02 22:47:55,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:47:55,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540266369] [2021-11-02 22:47:55,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:47:55,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:47:55,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:55,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:47:55,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:47:55,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540266369] [2021-11-02 22:47:55,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540266369] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:47:55,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:47:55,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:47:55,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199566311] [2021-11-02 22:47:55,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:47:55,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:47:55,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:47:55,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:47:55,550 INFO L87 Difference]: Start difference. First operand 1245 states and 2222 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 22:47:55,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:47:55,691 INFO L93 Difference]: Finished difference Result 3369 states and 6040 transitions. [2021-11-02 22:47:55,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:47:55,710 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2021-11-02 22:47:55,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:47:55,726 INFO L225 Difference]: With dead ends: 3369 [2021-11-02 22:47:55,726 INFO L226 Difference]: Without dead ends: 2225 [2021-11-02 22:47:55,728 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 22:47:55,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2021-11-02 22:47:55,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 1961. [2021-11-02 22:47:55,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1959 states have (on average 1.8004083716181725) internal successors, (3527), 1960 states have internal predecessors, (3527), 0 states have call successors, (0), 0 states 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 22:47:55,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 3527 transitions. [2021-11-02 22:47:55,868 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 3527 transitions. Word has length 83 [2021-11-02 22:47:55,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:47:55,869 INFO L470 AbstractCegarLoop]: Abstraction has 1961 states and 3527 transitions. [2021-11-02 22:47:55,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 22:47:55,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 3527 transitions. [2021-11-02 22:47:55,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-02 22:47:55,874 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:47:55,874 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:47:55,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 22:47:55,874 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:47:55,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:47:55,875 INFO L85 PathProgramCache]: Analyzing trace with hash -529031818, now seen corresponding path program 1 times [2021-11-02 22:47:55,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:47:55,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487739796] [2021-11-02 22:47:55,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:47:55,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:47:55,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:55,957 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 22:47:55,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:47:55,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487739796] [2021-11-02 22:47:55,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487739796] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:47:55,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:47:55,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:47:55,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345827434] [2021-11-02 22:47:55,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:47:55,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:47:55,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:47:55,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:47:55,960 INFO L87 Difference]: Start difference. First operand 1961 states and 3527 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 22:47:56,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:47:56,193 INFO L93 Difference]: Finished difference Result 5253 states and 9474 transitions. [2021-11-02 22:47:56,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:47:56,194 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2021-11-02 22:47:56,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:47:56,218 INFO L225 Difference]: With dead ends: 5253 [2021-11-02 22:47:56,218 INFO L226 Difference]: Without dead ends: 3427 [2021-11-02 22:47:56,223 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 22:47:56,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3427 states. [2021-11-02 22:47:56,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3427 to 3163. [2021-11-02 22:47:56,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3163 states, 3161 states have (on average 1.8070230939576084) internal successors, (5712), 3162 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states 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 22:47:56,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3163 states to 3163 states and 5712 transitions. [2021-11-02 22:47:56,508 INFO L78 Accepts]: Start accepts. Automaton has 3163 states and 5712 transitions. Word has length 84 [2021-11-02 22:47:56,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:47:56,509 INFO L470 AbstractCegarLoop]: Abstraction has 3163 states and 5712 transitions. [2021-11-02 22:47:56,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 22:47:56,510 INFO L276 IsEmpty]: Start isEmpty. Operand 3163 states and 5712 transitions. [2021-11-02 22:47:56,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-02 22:47:56,518 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:47:56,519 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:47:56,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 22:47:56,519 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:47:56,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:47:56,520 INFO L85 PathProgramCache]: Analyzing trace with hash 637069287, now seen corresponding path program 1 times [2021-11-02 22:47:56,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:47:56,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776393812] [2021-11-02 22:47:56,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:47:56,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:47:56,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:56,596 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 22:47:56,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:47:56,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776393812] [2021-11-02 22:47:56,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776393812] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:47:56,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:47:56,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:47:56,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137278723] [2021-11-02 22:47:56,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:47:56,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:47:56,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:47:56,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:47:56,599 INFO L87 Difference]: Start difference. First operand 3163 states and 5712 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states 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 22:47:57,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:47:57,009 INFO L93 Difference]: Finished difference Result 8575 states and 15512 transitions. [2021-11-02 22:47:57,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:47:57,010 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 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 85 [2021-11-02 22:47:57,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:47:57,049 INFO L225 Difference]: With dead ends: 8575 [2021-11-02 22:47:57,049 INFO L226 Difference]: Without dead ends: 5581 [2021-11-02 22:47:57,054 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 22:47:57,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5581 states. [2021-11-02 22:47:57,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5581 to 5317. [2021-11-02 22:47:57,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5317 states, 5315 states have (on average 1.8094073377234243) internal successors, (9617), 5316 states have internal predecessors, (9617), 0 states have call successors, (0), 0 states 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 22:47:57,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5317 states to 5317 states and 9617 transitions. [2021-11-02 22:47:57,440 INFO L78 Accepts]: Start accepts. Automaton has 5317 states and 9617 transitions. Word has length 85 [2021-11-02 22:47:57,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:47:57,441 INFO L470 AbstractCegarLoop]: Abstraction has 5317 states and 9617 transitions. [2021-11-02 22:47:57,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states 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 22:47:57,441 INFO L276 IsEmpty]: Start isEmpty. Operand 5317 states and 9617 transitions. [2021-11-02 22:47:57,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-02 22:47:57,451 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:47:57,451 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:47:57,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 22:47:57,452 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:47:57,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:47:57,452 INFO L85 PathProgramCache]: Analyzing trace with hash -85586873, now seen corresponding path program 1 times [2021-11-02 22:47:57,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:47:57,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127099786] [2021-11-02 22:47:57,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:47:57,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:47:57,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:57,521 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 22:47:57,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:47:57,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127099786] [2021-11-02 22:47:57,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127099786] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:47:57,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:47:57,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:47:57,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989494563] [2021-11-02 22:47:57,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:47:57,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:47:57,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:47:57,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:47:57,525 INFO L87 Difference]: Start difference. First operand 5317 states and 9617 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 22:47:58,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:47:58,131 INFO L93 Difference]: Finished difference Result 15495 states and 28069 transitions. [2021-11-02 22:47:58,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:47:58,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 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 86 [2021-11-02 22:47:58,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:47:58,187 INFO L225 Difference]: With dead ends: 15495 [2021-11-02 22:47:58,187 INFO L226 Difference]: Without dead ends: 10351 [2021-11-02 22:47:58,198 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 22:47:58,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10351 states. [2021-11-02 22:47:58,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10351 to 10087. [2021-11-02 22:47:58,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10087 states, 10085 states have (on average 1.810411502231036) internal successors, (18258), 10086 states have internal predecessors, (18258), 0 states have call successors, (0), 0 states 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 22:47:58,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10087 states to 10087 states and 18258 transitions. [2021-11-02 22:47:58,978 INFO L78 Accepts]: Start accepts. Automaton has 10087 states and 18258 transitions. Word has length 86 [2021-11-02 22:47:58,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:47:58,978 INFO L470 AbstractCegarLoop]: Abstraction has 10087 states and 18258 transitions. [2021-11-02 22:47:58,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 22:47:58,979 INFO L276 IsEmpty]: Start isEmpty. Operand 10087 states and 18258 transitions. [2021-11-02 22:47:58,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-02 22:47:58,994 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:47:58,994 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:47:58,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-02 22:47:58,995 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:47:58,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:47:58,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1094125290, now seen corresponding path program 1 times [2021-11-02 22:47:58,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:47:58,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823696927] [2021-11-02 22:47:58,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:47:58,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:47:59,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:59,060 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 22:47:59,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:47:59,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823696927] [2021-11-02 22:47:59,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823696927] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:47:59,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:47:59,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:47:59,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031182359] [2021-11-02 22:47:59,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:47:59,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:47:59,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:47:59,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:47:59,067 INFO L87 Difference]: Start difference. First operand 10087 states and 18258 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 22:48:00,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:48:00,051 INFO L93 Difference]: Finished difference Result 29507 states and 53467 transitions. [2021-11-02 22:48:00,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:48:00,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 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 87 [2021-11-02 22:48:00,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:48:00,112 INFO L225 Difference]: With dead ends: 29507 [2021-11-02 22:48:00,113 INFO L226 Difference]: Without dead ends: 19601 [2021-11-02 22:48:00,131 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 22:48:00,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19601 states. [2021-11-02 22:48:01,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19601 to 19337. [2021-11-02 22:48:01,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19337 states, 19335 states have (on average 1.8099301784328936) internal successors, (34995), 19336 states have internal predecessors, (34995), 0 states have call successors, (0), 0 states 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 22:48:01,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19337 states to 19337 states and 34995 transitions. [2021-11-02 22:48:01,483 INFO L78 Accepts]: Start accepts. Automaton has 19337 states and 34995 transitions. Word has length 87 [2021-11-02 22:48:01,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:48:01,484 INFO L470 AbstractCegarLoop]: Abstraction has 19337 states and 34995 transitions. [2021-11-02 22:48:01,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 22:48:01,484 INFO L276 IsEmpty]: Start isEmpty. Operand 19337 states and 34995 transitions. [2021-11-02 22:48:01,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-02 22:48:01,504 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:48:01,504 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:48:01,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-02 22:48:01,504 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:48:01,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:01,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1408509833, now seen corresponding path program 1 times [2021-11-02 22:48:01,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:48:01,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034176777] [2021-11-02 22:48:01,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:01,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:48:01,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:01,578 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 22:48:01,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:48:01,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034176777] [2021-11-02 22:48:01,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034176777] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:48:01,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:48:01,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:48:01,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478759003] [2021-11-02 22:48:01,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:48:01,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:48:01,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:48:01,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:48:01,581 INFO L87 Difference]: Start difference. First operand 19337 states and 34995 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 22:48:03,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:48:03,399 INFO L93 Difference]: Finished difference Result 57443 states and 103992 transitions. [2021-11-02 22:48:03,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:48:03,400 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 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 88 [2021-11-02 22:48:03,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:48:03,525 INFO L225 Difference]: With dead ends: 57443 [2021-11-02 22:48:03,526 INFO L226 Difference]: Without dead ends: 38291 [2021-11-02 22:48:03,559 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 22:48:03,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38291 states. [2021-11-02 22:48:05,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38291 to 38027. [2021-11-02 22:48:06,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38027 states, 38025 states have (on average 1.807337278106509) internal successors, (68724), 38026 states have internal predecessors, (68724), 0 states have call successors, (0), 0 states 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 22:48:06,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38027 states to 38027 states and 68724 transitions. [2021-11-02 22:48:06,131 INFO L78 Accepts]: Start accepts. Automaton has 38027 states and 68724 transitions. Word has length 88 [2021-11-02 22:48:06,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:48:06,131 INFO L470 AbstractCegarLoop]: Abstraction has 38027 states and 68724 transitions. [2021-11-02 22:48:06,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 22:48:06,132 INFO L276 IsEmpty]: Start isEmpty. Operand 38027 states and 68724 transitions. [2021-11-02 22:48:06,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-02 22:48:06,167 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:48:06,167 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-02 22:48:06,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-02 22:48:06,168 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:48:06,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:06,168 INFO L85 PathProgramCache]: Analyzing trace with hash 364431197, now seen corresponding path program 1 times [2021-11-02 22:48:06,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:48:06,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725135907] [2021-11-02 22:48:06,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:06,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:48:06,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:06,275 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 22:48:06,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:48:06,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725135907] [2021-11-02 22:48:06,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725135907] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:48:06,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:48:06,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:48:06,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21248614] [2021-11-02 22:48:06,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:48:06,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:48:06,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:48:06,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:48:06,279 INFO L87 Difference]: Start difference. First operand 38027 states and 68724 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 22:48:09,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:48:09,977 INFO L93 Difference]: Finished difference Result 111784 states and 201985 transitions. [2021-11-02 22:48:09,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:48:09,978 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 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 89 [2021-11-02 22:48:09,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:48:10,243 INFO L225 Difference]: With dead ends: 111784 [2021-11-02 22:48:10,243 INFO L226 Difference]: Without dead ends: 74010 [2021-11-02 22:48:10,470 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:48:10,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74010 states. [2021-11-02 22:48:12,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74010 to 38027. [2021-11-02 22:48:12,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38027 states, 38025 states have (on average 1.800552268244576) internal successors, (68466), 38026 states have internal predecessors, (68466), 0 states have call successors, (0), 0 states 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 22:48:12,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38027 states to 38027 states and 68466 transitions. [2021-11-02 22:48:12,416 INFO L78 Accepts]: Start accepts. Automaton has 38027 states and 68466 transitions. Word has length 89 [2021-11-02 22:48:12,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:48:12,417 INFO L470 AbstractCegarLoop]: Abstraction has 38027 states and 68466 transitions. [2021-11-02 22:48:12,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 22:48:12,417 INFO L276 IsEmpty]: Start isEmpty. Operand 38027 states and 68466 transitions. [2021-11-02 22:48:12,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-02 22:48:12,466 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:48:12,466 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-02 22:48:12,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-02 22:48:12,467 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:48:12,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:12,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1666248827, now seen corresponding path program 2 times [2021-11-02 22:48:12,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:48:12,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164717693] [2021-11-02 22:48:12,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:12,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:48:12,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:12,549 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:48:12,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:48:12,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164717693] [2021-11-02 22:48:12,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164717693] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:48:12,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:48:12,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:48:12,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581154643] [2021-11-02 22:48:12,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:48:12,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:48:12,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:48:12,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:48:12,555 INFO L87 Difference]: Start difference. First operand 38027 states and 68466 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states 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 22:48:14,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:48:14,097 INFO L93 Difference]: Finished difference Result 76059 states and 136946 transitions. [2021-11-02 22:48:14,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:48:14,098 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 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 89 [2021-11-02 22:48:14,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:48:14,190 INFO L225 Difference]: With dead ends: 76059 [2021-11-02 22:48:14,190 INFO L226 Difference]: Without dead ends: 38291 [2021-11-02 22:48:14,223 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 22:48:14,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38291 states. [2021-11-02 22:48:15,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38291 to 38027. [2021-11-02 22:48:15,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38027 states, 38025 states have (on average 1.7971860618014464) internal successors, (68338), 38026 states have internal predecessors, (68338), 0 states have call successors, (0), 0 states 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 22:48:15,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38027 states to 38027 states and 68338 transitions. [2021-11-02 22:48:15,888 INFO L78 Accepts]: Start accepts. Automaton has 38027 states and 68338 transitions. Word has length 89 [2021-11-02 22:48:15,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:48:15,888 INFO L470 AbstractCegarLoop]: Abstraction has 38027 states and 68338 transitions. [2021-11-02 22:48:15,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states 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 22:48:15,889 INFO L276 IsEmpty]: Start isEmpty. Operand 38027 states and 68338 transitions. [2021-11-02 22:48:15,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-02 22:48:15,917 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:48:15,917 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:48:15,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-02 22:48:15,918 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:48:15,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:15,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1957193240, now seen corresponding path program 1 times [2021-11-02 22:48:15,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:48:15,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381609362] [2021-11-02 22:48:15,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:15,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:48:15,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:16,005 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 22:48:16,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:48:16,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381609362] [2021-11-02 22:48:16,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381609362] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:48:16,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:48:16,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:48:16,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714838057] [2021-11-02 22:48:16,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:48:16,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:48:16,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:48:16,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:48:16,008 INFO L87 Difference]: Start difference. First operand 38027 states and 68338 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states 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 22:48:18,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:48:18,171 INFO L93 Difference]: Finished difference Result 105669 states and 189628 transitions. [2021-11-02 22:48:18,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:48:18,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 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 89 [2021-11-02 22:48:18,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:48:18,334 INFO L225 Difference]: With dead ends: 105669 [2021-11-02 22:48:18,334 INFO L226 Difference]: Without dead ends: 67861 [2021-11-02 22:48:18,366 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 22:48:18,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67861 states. [2021-11-02 22:48:21,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67861 to 67597. [2021-11-02 22:48:21,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67597 states, 67595 states have (on average 1.7892891486056661) internal successors, (120947), 67596 states have internal predecessors, (120947), 0 states have call successors, (0), 0 states 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 22:48:21,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67597 states to 67597 states and 120947 transitions. [2021-11-02 22:48:21,284 INFO L78 Accepts]: Start accepts. Automaton has 67597 states and 120947 transitions. Word has length 89 [2021-11-02 22:48:21,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:48:21,285 INFO L470 AbstractCegarLoop]: Abstraction has 67597 states and 120947 transitions. [2021-11-02 22:48:21,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states 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 22:48:21,285 INFO L276 IsEmpty]: Start isEmpty. Operand 67597 states and 120947 transitions. [2021-11-02 22:48:21,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-02 22:48:21,310 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:48:21,310 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-02 22:48:21,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-02 22:48:21,311 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:48:21,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:21,311 INFO L85 PathProgramCache]: Analyzing trace with hash -245077055, now seen corresponding path program 1 times [2021-11-02 22:48:21,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:48:21,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535737732] [2021-11-02 22:48:21,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:21,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:48:21,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:21,394 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 22:48:21,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:48:21,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535737732] [2021-11-02 22:48:21,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535737732] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:48:21,395 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:48:21,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:48:21,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076365136] [2021-11-02 22:48:21,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:48:21,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:48:21,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:48:21,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:48:21,397 INFO L87 Difference]: Start difference. First operand 67597 states and 120947 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 22:48:26,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:48:26,083 INFO L93 Difference]: Finished difference Result 136014 states and 243278 transitions. [2021-11-02 22:48:26,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:48:26,088 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 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 90 [2021-11-02 22:48:26,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:48:26,399 INFO L225 Difference]: With dead ends: 136014 [2021-11-02 22:48:26,399 INFO L226 Difference]: Without dead ends: 135768 [2021-11-02 22:48:26,428 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:48:26,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135768 states. [2021-11-02 22:48:31,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135768 to 135066. [2021-11-02 22:48:31,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135066 states, 135064 states have (on average 1.7893517147426405) internal successors, (241677), 135065 states have internal predecessors, (241677), 0 states have call successors, (0), 0 states 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 22:48:32,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135066 states to 135066 states and 241677 transitions. [2021-11-02 22:48:32,569 INFO L78 Accepts]: Start accepts. Automaton has 135066 states and 241677 transitions. Word has length 90 [2021-11-02 22:48:32,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:48:32,569 INFO L470 AbstractCegarLoop]: Abstraction has 135066 states and 241677 transitions. [2021-11-02 22:48:32,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 22:48:32,570 INFO L276 IsEmpty]: Start isEmpty. Operand 135066 states and 241677 transitions. [2021-11-02 22:48:32,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-02 22:48:32,606 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:48:32,606 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-02 22:48:32,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-02 22:48:32,606 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:48:32,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:32,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1972483980, now seen corresponding path program 1 times [2021-11-02 22:48:32,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:48:32,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423876824] [2021-11-02 22:48:32,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:32,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:48:32,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:32,681 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 22:48:32,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:48:32,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423876824] [2021-11-02 22:48:32,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423876824] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:48:32,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:48:32,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:48:32,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777441081] [2021-11-02 22:48:32,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:48:32,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:48:32,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:48:32,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:48:32,684 INFO L87 Difference]: Start difference. First operand 135066 states and 241677 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)