./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.09.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c494f22-6459-423e-9a2e-b9fbb40f1363/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c494f22-6459-423e-9a2e-b9fbb40f1363/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c494f22-6459-423e-9a2e-b9fbb40f1363/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c494f22-6459-423e-9a2e-b9fbb40f1363/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.09.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c494f22-6459-423e-9a2e-b9fbb40f1363/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c494f22-6459-423e-9a2e-b9fbb40f1363/bin/uautomizer-YU5uOKAj3y --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 834ccc2d6e5ce947bfece9c1e11f57131346eaac8927553a9495d7568350ac6e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:45:39,527 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:45:39,529 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:45:39,583 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:45:39,583 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:45:39,585 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:45:39,586 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:45:39,589 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:45:39,591 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:45:39,592 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:45:39,593 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:45:39,595 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:45:39,595 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:45:39,597 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:45:39,604 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:45:39,606 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:45:39,607 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:45:39,609 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:45:39,611 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:45:39,614 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:45:39,616 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:45:39,618 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:45:39,619 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:45:39,620 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:45:39,624 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:45:39,625 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:45:39,625 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:45:39,626 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:45:39,627 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:45:39,628 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:45:39,628 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:45:39,634 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:45:39,635 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:45:39,636 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:45:39,638 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:45:39,638 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:45:39,639 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:45:39,640 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:45:39,640 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:45:39,641 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:45:39,642 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:45:39,643 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c494f22-6459-423e-9a2e-b9fbb40f1363/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 18:45:39,669 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:45:39,670 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:45:39,670 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:45:39,670 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:45:39,671 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:45:39,671 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:45:39,672 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:45:39,672 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:45:39,673 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:45:39,673 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:45:39,673 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:45:39,673 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:45:39,674 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:45:39,674 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:45:39,674 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:45:39,674 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:45:39,675 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:45:39,675 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:45:39,675 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:45:39,675 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:45:39,675 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:45:39,676 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:45:39,676 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:45:39,676 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:45:39,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:45:39,677 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:45:39,677 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:45:39,677 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:45:39,677 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:45:39,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:45:39,678 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:45:39,678 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:45:39,678 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:45:39,679 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:45:39,679 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_9c494f22-6459-423e-9a2e-b9fbb40f1363/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c494f22-6459-423e-9a2e-b9fbb40f1363/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 834ccc2d6e5ce947bfece9c1e11f57131346eaac8927553a9495d7568350ac6e [2021-11-13 18:45:39,914 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:45:39,936 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:45:39,939 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:45:39,940 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:45:39,943 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:45:39,944 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c494f22-6459-423e-9a2e-b9fbb40f1363/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/systemc/token_ring.09.cil-1.c [2021-11-13 18:45:40,011 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c494f22-6459-423e-9a2e-b9fbb40f1363/bin/uautomizer-YU5uOKAj3y/data/73be4be43/394c9ade60514cf2b8ce69c9314ea3fa/FLAG756020643 [2021-11-13 18:45:40,584 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:45:40,584 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c494f22-6459-423e-9a2e-b9fbb40f1363/sv-benchmarks/c/systemc/token_ring.09.cil-1.c [2021-11-13 18:45:40,599 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c494f22-6459-423e-9a2e-b9fbb40f1363/bin/uautomizer-YU5uOKAj3y/data/73be4be43/394c9ade60514cf2b8ce69c9314ea3fa/FLAG756020643 [2021-11-13 18:45:40,888 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c494f22-6459-423e-9a2e-b9fbb40f1363/bin/uautomizer-YU5uOKAj3y/data/73be4be43/394c9ade60514cf2b8ce69c9314ea3fa [2021-11-13 18:45:40,891 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:45:40,894 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:45:40,898 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:45:40,898 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:45:40,903 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:45:40,903 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:45:40" (1/1) ... [2021-11-13 18:45:40,904 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@680b3dc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:40, skipping insertion in model container [2021-11-13 18:45:40,905 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:45:40" (1/1) ... [2021-11-13 18:45:40,912 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:45:40,985 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:45:41,132 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_9c494f22-6459-423e-9a2e-b9fbb40f1363/sv-benchmarks/c/systemc/token_ring.09.cil-1.c[671,684] [2021-11-13 18:45:41,242 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:45:41,253 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:45:41,268 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_9c494f22-6459-423e-9a2e-b9fbb40f1363/sv-benchmarks/c/systemc/token_ring.09.cil-1.c[671,684] [2021-11-13 18:45:41,347 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:45:41,384 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:45:41,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:41 WrapperNode [2021-11-13 18:45:41,385 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:45:41,387 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:45:41,387 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:45:41,387 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:45:41,394 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:41" (1/1) ... [2021-11-13 18:45:41,407 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:41" (1/1) ... [2021-11-13 18:45:41,461 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:45:41,462 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:45:41,462 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:45:41,462 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:45:41,471 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:41" (1/1) ... [2021-11-13 18:45:41,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:41" (1/1) ... [2021-11-13 18:45:41,476 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:41" (1/1) ... [2021-11-13 18:45:41,476 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:41" (1/1) ... [2021-11-13 18:45:41,506 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:41" (1/1) ... [2021-11-13 18:45:41,543 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:41" (1/1) ... [2021-11-13 18:45:41,546 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:41" (1/1) ... [2021-11-13 18:45:41,552 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:45:41,553 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:45:41,553 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:45:41,553 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:45:41,565 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:41" (1/1) ... [2021-11-13 18:45:41,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:45:41,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c494f22-6459-423e-9a2e-b9fbb40f1363/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:45:41,608 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c494f22-6459-423e-9a2e-b9fbb40f1363/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:45:41,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c494f22-6459-423e-9a2e-b9fbb40f1363/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:45:41,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:45:41,662 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-13 18:45:41,662 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-13 18:45:41,662 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-13 18:45:41,662 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-13 18:45:41,662 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-13 18:45:41,662 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-13 18:45:41,663 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-13 18:45:41,663 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-13 18:45:41,663 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-13 18:45:41,664 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-13 18:45:41,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:45:41,664 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-13 18:45:41,664 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-13 18:45:41,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:45:41,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:45:42,653 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:45:42,653 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-11-13 18:45:42,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:45:42 BoogieIcfgContainer [2021-11-13 18:45:42,656 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:45:42,658 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:45:42,659 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:45:42,667 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:45:42,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:45:40" (1/3) ... [2021-11-13 18:45:42,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@186f81ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:45:42, skipping insertion in model container [2021-11-13 18:45:42,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:41" (2/3) ... [2021-11-13 18:45:42,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@186f81ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:45:42, skipping insertion in model container [2021-11-13 18:45:42,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:45:42" (3/3) ... [2021-11-13 18:45:42,671 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.09.cil-1.c [2021-11-13 18:45:42,677 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:45:42,682 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:45:42,738 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:45:42,746 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 [2021-11-13 18:45:42,746 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:45:42,773 INFO L276 IsEmpty]: Start isEmpty. Operand has 307 states, 276 states have (on average 1.6521739130434783) internal successors, (456), 278 states have internal predecessors, (456), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-13 18:45:42,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-13 18:45:42,829 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:42,830 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:42,830 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:42,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:42,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1628036766, now seen corresponding path program 1 times [2021-11-13 18:45:42,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:42,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435057113] [2021-11-13 18:45:42,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:42,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:43,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:43,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:43,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:43,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:45:43,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:43,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 18:45:43,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:43,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 18:45:43,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:43,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 18:45:43,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:43,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:45:43,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:43,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435057113] [2021-11-13 18:45:43,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435057113] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:45:43,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:45:43,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:45:43,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143475994] [2021-11-13 18:45:43,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:45:43,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:45:43,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:43,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:45:43,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:45:43,487 INFO L87 Difference]: Start difference. First operand has 307 states, 276 states have (on average 1.6521739130434783) internal successors, (456), 278 states have internal predecessors, (456), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Second operand has 5 states, 5 states have (on average 26.8) internal successors, (134), 3 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:45:45,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:45,147 INFO L93 Difference]: Finished difference Result 710 states and 1171 transitions. [2021-11-13 18:45:45,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:45:45,150 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 3 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 144 [2021-11-13 18:45:45,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:45,167 INFO L225 Difference]: With dead ends: 710 [2021-11-13 18:45:45,167 INFO L226 Difference]: Without dead ends: 411 [2021-11-13 18:45:45,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:45:45,177 INFO L933 BasicCegarLoop]: 522 mSDtfsCounter, 803 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1008.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 40.30ms SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1193.84ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:45,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [824 Valid, 858 Invalid, 601 Unknown, 0 Unchecked, 40.30ms Time], IncrementalHoareTripleChecker [54 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 1193.84ms Time] [2021-11-13 18:45:45,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-11-13 18:45:45,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 302. [2021-11-13 18:45:45,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 272 states have (on average 1.5625) internal successors, (425), 273 states have internal predecessors, (425), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-13 18:45:45,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 471 transitions. [2021-11-13 18:45:45,269 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 471 transitions. Word has length 144 [2021-11-13 18:45:45,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:45,270 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 471 transitions. [2021-11-13 18:45:45,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 3 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:45:45,275 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 471 transitions. [2021-11-13 18:45:45,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-13 18:45:45,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:45,285 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:45,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:45:45,286 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:45,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:45,287 INFO L85 PathProgramCache]: Analyzing trace with hash -2122057956, now seen corresponding path program 1 times [2021-11-13 18:45:45,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:45,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373414881] [2021-11-13 18:45:45,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:45,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:45,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:45,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:45,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:45,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:45:45,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:45,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 18:45:45,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:45,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 18:45:45,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:45,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 18:45:45,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:45,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:45:45,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:45,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373414881] [2021-11-13 18:45:45,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373414881] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:45:45,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:45:45,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:45:45,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732669992] [2021-11-13 18:45:45,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:45:45,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:45:45,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:45,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:45:45,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:45:45,612 INFO L87 Difference]: Start difference. First operand 302 states and 471 transitions. Second operand has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 4 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:45:47,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:47,146 INFO L93 Difference]: Finished difference Result 695 states and 1102 transitions. [2021-11-13 18:45:47,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:45:47,147 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 4 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 144 [2021-11-13 18:45:47,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:47,152 INFO L225 Difference]: With dead ends: 695 [2021-11-13 18:45:47,152 INFO L226 Difference]: Without dead ends: 410 [2021-11-13 18:45:47,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:45:47,158 INFO L933 BasicCegarLoop]: 480 mSDtfsCounter, 790 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1121.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 1009 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.39ms SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1292.39ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:47,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [807 Valid, 1009 Invalid, 1093 Unknown, 0 Unchecked, 23.39ms Time], IncrementalHoareTripleChecker [60 Valid, 1033 Invalid, 0 Unknown, 0 Unchecked, 1292.39ms Time] [2021-11-13 18:45:47,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-11-13 18:45:47,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 302. [2021-11-13 18:45:47,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 272 states have (on average 1.5588235294117647) internal successors, (424), 273 states have internal predecessors, (424), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-13 18:45:47,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 470 transitions. [2021-11-13 18:45:47,203 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 470 transitions. Word has length 144 [2021-11-13 18:45:47,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:47,203 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 470 transitions. [2021-11-13 18:45:47,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 4 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:45:47,204 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 470 transitions. [2021-11-13 18:45:47,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-13 18:45:47,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:47,206 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:47,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:45:47,207 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:47,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:47,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1466312734, now seen corresponding path program 1 times [2021-11-13 18:45:47,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:47,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916344705] [2021-11-13 18:45:47,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:47,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:47,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:47,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:47,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:47,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:45:47,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:47,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 18:45:47,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:47,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 18:45:47,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:47,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 18:45:47,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:47,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:45:47,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:47,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916344705] [2021-11-13 18:45:47,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916344705] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:45:47,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:45:47,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:45:47,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231930112] [2021-11-13 18:45:47,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:45:47,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:45:47,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:47,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:45:47,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:45:47,412 INFO L87 Difference]: Start difference. First operand 302 states and 470 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:45:48,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:48,889 INFO L93 Difference]: Finished difference Result 714 states and 1137 transitions. [2021-11-13 18:45:48,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:45:48,889 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 144 [2021-11-13 18:45:48,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:48,893 INFO L225 Difference]: With dead ends: 714 [2021-11-13 18:45:48,894 INFO L226 Difference]: Without dead ends: 429 [2021-11-13 18:45:48,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:45:48,898 INFO L933 BasicCegarLoop]: 511 mSDtfsCounter, 989 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1035.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1006 SdHoareTripleChecker+Valid, 1097 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.92ms SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1211.03ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:48,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1006 Valid, 1097 Invalid, 1142 Unknown, 0 Unchecked, 16.92ms Time], IncrementalHoareTripleChecker [87 Valid, 1055 Invalid, 0 Unknown, 0 Unchecked, 1211.03ms Time] [2021-11-13 18:45:48,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-11-13 18:45:48,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 302. [2021-11-13 18:45:48,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 272 states have (on average 1.5551470588235294) internal successors, (423), 273 states have internal predecessors, (423), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-13 18:45:48,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 469 transitions. [2021-11-13 18:45:48,939 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 469 transitions. Word has length 144 [2021-11-13 18:45:48,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:48,940 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 469 transitions. [2021-11-13 18:45:48,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:45:48,940 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 469 transitions. [2021-11-13 18:45:48,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-13 18:45:48,942 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:48,943 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:48,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 18:45:48,943 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:48,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:48,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1881616676, now seen corresponding path program 1 times [2021-11-13 18:45:48,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:48,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120787377] [2021-11-13 18:45:48,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:48,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:48,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:48,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:48,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:45:49,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 18:45:49,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 18:45:49,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 18:45:49,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:45:49,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:49,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120787377] [2021-11-13 18:45:49,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120787377] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:45:49,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:45:49,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:45:49,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893193722] [2021-11-13 18:45:49,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:45:49,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:45:49,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:49,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:45:49,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:45:49,087 INFO L87 Difference]: Start difference. First operand 302 states and 469 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:45:50,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:50,621 INFO L93 Difference]: Finished difference Result 693 states and 1096 transitions. [2021-11-13 18:45:50,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:45:50,622 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 144 [2021-11-13 18:45:50,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:50,626 INFO L225 Difference]: With dead ends: 693 [2021-11-13 18:45:50,627 INFO L226 Difference]: Without dead ends: 408 [2021-11-13 18:45:50,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:45:50,640 INFO L933 BasicCegarLoop]: 470 mSDtfsCounter, 856 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 1060 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1133.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 1209 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.30ms SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1302.94ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:50,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [873 Valid, 1209 Invalid, 1123 Unknown, 0 Unchecked, 17.30ms Time], IncrementalHoareTripleChecker [63 Valid, 1060 Invalid, 0 Unknown, 0 Unchecked, 1302.94ms Time] [2021-11-13 18:45:50,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-11-13 18:45:50,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 302. [2021-11-13 18:45:50,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 272 states have (on average 1.5441176470588236) internal successors, (420), 273 states have internal predecessors, (420), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-13 18:45:50,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 466 transitions. [2021-11-13 18:45:50,695 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 466 transitions. Word has length 144 [2021-11-13 18:45:50,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:50,695 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 466 transitions. [2021-11-13 18:45:50,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:45:50,696 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 466 transitions. [2021-11-13 18:45:50,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-13 18:45:50,698 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:50,699 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:50,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 18:45:50,707 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:50,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:50,708 INFO L85 PathProgramCache]: Analyzing trace with hash -360251552, now seen corresponding path program 1 times [2021-11-13 18:45:50,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:50,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857638431] [2021-11-13 18:45:50,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:50,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:50,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:50,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:50,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:50,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:45:50,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:50,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 18:45:50,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:50,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 18:45:50,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:50,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 18:45:50,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:50,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:45:50,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:50,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857638431] [2021-11-13 18:45:50,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857638431] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:45:50,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:45:50,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 18:45:50,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626969948] [2021-11-13 18:45:50,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:45:50,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:45:50,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:50,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:45:50,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:45:50,917 INFO L87 Difference]: Start difference. First operand 302 states and 466 transitions. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 6 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:45:53,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:53,597 INFO L93 Difference]: Finished difference Result 1116 states and 1765 transitions. [2021-11-13 18:45:53,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 18:45:53,598 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 6 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 144 [2021-11-13 18:45:53,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:53,607 INFO L225 Difference]: With dead ends: 1116 [2021-11-13 18:45:53,607 INFO L226 Difference]: Without dead ends: 831 [2021-11-13 18:45:53,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-11-13 18:45:53,613 INFO L933 BasicCegarLoop]: 781 mSDtfsCounter, 1544 mSDsluCounter, 1776 mSDsCounter, 0 mSdLazyCounter, 2215 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1762.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1561 SdHoareTripleChecker+Valid, 2557 SdHoareTripleChecker+Invalid, 2311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.55ms SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 2215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2117.75ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:53,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1561 Valid, 2557 Invalid, 2311 Unknown, 0 Unchecked, 24.55ms Time], IncrementalHoareTripleChecker [96 Valid, 2215 Invalid, 0 Unknown, 0 Unchecked, 2117.75ms Time] [2021-11-13 18:45:53,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2021-11-13 18:45:53,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 601. [2021-11-13 18:45:53,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 545 states have (on average 1.5541284403669724) internal successors, (847), 547 states have internal predecessors, (847), 42 states have call successors, (42), 12 states have call predecessors, (42), 13 states have return successors, (45), 43 states have call predecessors, (45), 42 states have call successors, (45) [2021-11-13 18:45:53,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 934 transitions. [2021-11-13 18:45:53,704 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 934 transitions. Word has length 144 [2021-11-13 18:45:53,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:53,705 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 934 transitions. [2021-11-13 18:45:53,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 6 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:45:53,705 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 934 transitions. [2021-11-13 18:45:53,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-13 18:45:53,707 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:53,708 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:53,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 18:45:53,709 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:53,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:53,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1884306846, now seen corresponding path program 1 times [2021-11-13 18:45:53,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:53,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428704499] [2021-11-13 18:45:53,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:53,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:53,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:53,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:53,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:53,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:45:53,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:53,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 18:45:53,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:53,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 18:45:53,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:53,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 18:45:53,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:53,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:45:53,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:53,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428704499] [2021-11-13 18:45:53,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428704499] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:45:53,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:45:53,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:45:53,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481002527] [2021-11-13 18:45:53,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:45:53,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:45:53,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:53,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:45:53,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:45:53,871 INFO L87 Difference]: Start difference. First operand 601 states and 934 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:45:55,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:55,458 INFO L93 Difference]: Finished difference Result 1446 states and 2297 transitions. [2021-11-13 18:45:55,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:45:55,459 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 144 [2021-11-13 18:45:55,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:55,468 INFO L225 Difference]: With dead ends: 1446 [2021-11-13 18:45:55,469 INFO L226 Difference]: Without dead ends: 862 [2021-11-13 18:45:55,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:45:55,473 INFO L933 BasicCegarLoop]: 495 mSDtfsCounter, 855 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 1154 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1118.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 872 SdHoareTripleChecker+Valid, 1233 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.14ms SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1317.46ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:55,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [872 Valid, 1233 Invalid, 1225 Unknown, 0 Unchecked, 13.14ms Time], IncrementalHoareTripleChecker [71 Valid, 1154 Invalid, 0 Unknown, 0 Unchecked, 1317.46ms Time] [2021-11-13 18:45:55,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2021-11-13 18:45:55,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 601. [2021-11-13 18:45:55,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 545 states have (on average 1.5504587155963303) internal successors, (845), 547 states have internal predecessors, (845), 42 states have call successors, (42), 12 states have call predecessors, (42), 13 states have return successors, (45), 43 states have call predecessors, (45), 42 states have call successors, (45) [2021-11-13 18:45:55,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 932 transitions. [2021-11-13 18:45:55,540 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 932 transitions. Word has length 144 [2021-11-13 18:45:55,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:55,541 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 932 transitions. [2021-11-13 18:45:55,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:45:55,541 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 932 transitions. [2021-11-13 18:45:55,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-13 18:45:55,543 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:55,544 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:55,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 18:45:55,544 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:55,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:55,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1922613344, now seen corresponding path program 1 times [2021-11-13 18:45:55,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:55,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971307245] [2021-11-13 18:45:55,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:55,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:55,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:55,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:55,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:55,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:45:55,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:55,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 18:45:55,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:55,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 18:45:55,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:55,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 18:45:55,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:55,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:45:55,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:55,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971307245] [2021-11-13 18:45:55,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971307245] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:45:55,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:45:55,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:45:55,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743396161] [2021-11-13 18:45:55,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:45:55,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:45:55,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:55,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:45:55,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:45:55,711 INFO L87 Difference]: Start difference. First operand 601 states and 932 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:45:57,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:57,090 INFO L93 Difference]: Finished difference Result 1440 states and 2280 transitions. [2021-11-13 18:45:57,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:45:57,091 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 144 [2021-11-13 18:45:57,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:57,100 INFO L225 Difference]: With dead ends: 1440 [2021-11-13 18:45:57,100 INFO L226 Difference]: Without dead ends: 856 [2021-11-13 18:45:57,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:45:57,104 INFO L933 BasicCegarLoop]: 460 mSDtfsCounter, 906 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 935.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 1196 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.85ms SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1136.35ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:57,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [923 Valid, 1196 Invalid, 1149 Unknown, 0 Unchecked, 11.85ms Time], IncrementalHoareTripleChecker [73 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 1136.35ms Time] [2021-11-13 18:45:57,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2021-11-13 18:45:57,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 601. [2021-11-13 18:45:57,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 545 states have (on average 1.546788990825688) internal successors, (843), 547 states have internal predecessors, (843), 42 states have call successors, (42), 12 states have call predecessors, (42), 13 states have return successors, (45), 43 states have call predecessors, (45), 42 states have call successors, (45) [2021-11-13 18:45:57,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 930 transitions. [2021-11-13 18:45:57,172 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 930 transitions. Word has length 144 [2021-11-13 18:45:57,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:57,173 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 930 transitions. [2021-11-13 18:45:57,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:45:57,177 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 930 transitions. [2021-11-13 18:45:57,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-13 18:45:57,179 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:57,180 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:57,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 18:45:57,180 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:57,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:57,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1090181666, now seen corresponding path program 1 times [2021-11-13 18:45:57,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:57,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267701011] [2021-11-13 18:45:57,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:57,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:57,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:57,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:57,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:57,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:45:57,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:57,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 18:45:57,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:57,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 18:45:57,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:57,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 18:45:57,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:57,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:45:57,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:57,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267701011] [2021-11-13 18:45:57,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267701011] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:45:57,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:45:57,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:45:57,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248559569] [2021-11-13 18:45:57,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:45:57,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:45:57,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:57,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:45:57,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:45:57,367 INFO L87 Difference]: Start difference. First operand 601 states and 930 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:45:58,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:58,729 INFO L93 Difference]: Finished difference Result 1437 states and 2268 transitions. [2021-11-13 18:45:58,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:45:58,730 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 144 [2021-11-13 18:45:58,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:58,736 INFO L225 Difference]: With dead ends: 1437 [2021-11-13 18:45:58,736 INFO L226 Difference]: Without dead ends: 853 [2021-11-13 18:45:58,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:45:58,740 INFO L933 BasicCegarLoop]: 485 mSDtfsCounter, 979 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 935.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 996 SdHoareTripleChecker+Valid, 1068 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.26ms SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1088.16ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:58,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [996 Valid, 1068 Invalid, 1089 Unknown, 0 Unchecked, 11.26ms Time], IncrementalHoareTripleChecker [94 Valid, 995 Invalid, 0 Unknown, 0 Unchecked, 1088.16ms Time] [2021-11-13 18:45:58,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2021-11-13 18:45:58,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 601. [2021-11-13 18:45:58,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 545 states have (on average 1.543119266055046) internal successors, (841), 547 states have internal predecessors, (841), 42 states have call successors, (42), 12 states have call predecessors, (42), 13 states have return successors, (45), 43 states have call predecessors, (45), 42 states have call successors, (45) [2021-11-13 18:45:58,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 928 transitions. [2021-11-13 18:45:58,807 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 928 transitions. Word has length 144 [2021-11-13 18:45:58,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:58,807 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 928 transitions. [2021-11-13 18:45:58,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:45:58,808 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 928 transitions. [2021-11-13 18:45:58,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-13 18:45:58,810 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:58,810 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:58,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 18:45:58,810 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:58,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:58,811 INFO L85 PathProgramCache]: Analyzing trace with hash -752294048, now seen corresponding path program 1 times [2021-11-13 18:45:58,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:58,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443628540] [2021-11-13 18:45:58,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:58,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:58,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:58,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:58,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:58,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:45:58,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:58,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 18:45:58,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:58,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 18:45:58,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:58,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 18:45:58,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:58,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:45:58,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:58,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443628540] [2021-11-13 18:45:58,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443628540] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:45:58,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:45:58,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 18:45:58,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131847183] [2021-11-13 18:45:58,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:45:58,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:45:58,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:58,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:45:58,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:45:58,995 INFO L87 Difference]: Start difference. First operand 601 states and 928 transitions. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 6 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:46:02,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:02,162 INFO L93 Difference]: Finished difference Result 2252 states and 3550 transitions. [2021-11-13 18:46:02,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 18:46:02,163 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 6 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 144 [2021-11-13 18:46:02,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:02,177 INFO L225 Difference]: With dead ends: 2252 [2021-11-13 18:46:02,177 INFO L226 Difference]: Without dead ends: 1668 [2021-11-13 18:46:02,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-11-13 18:46:02,183 INFO L933 BasicCegarLoop]: 750 mSDtfsCounter, 1281 mSDsluCounter, 2062 mSDsCounter, 0 mSdLazyCounter, 2367 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2154.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1298 SdHoareTripleChecker+Valid, 2812 SdHoareTripleChecker+Invalid, 2445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 31.18ms SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2495.49ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:02,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1298 Valid, 2812 Invalid, 2445 Unknown, 0 Unchecked, 31.18ms Time], IncrementalHoareTripleChecker [78 Valid, 2367 Invalid, 0 Unknown, 0 Unchecked, 2495.49ms Time] [2021-11-13 18:46:02,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1668 states. [2021-11-13 18:46:02,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1668 to 1220. [2021-11-13 18:46:02,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1220 states, 1110 states have (on average 1.553153153153153) internal successors, (1724), 1116 states have internal predecessors, (1724), 80 states have call successors, (80), 24 states have call predecessors, (80), 29 states have return successors, (95), 83 states have call predecessors, (95), 80 states have call successors, (95) [2021-11-13 18:46:02,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 1899 transitions. [2021-11-13 18:46:02,318 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 1899 transitions. Word has length 144 [2021-11-13 18:46:02,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:02,318 INFO L470 AbstractCegarLoop]: Abstraction has 1220 states and 1899 transitions. [2021-11-13 18:46:02,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 6 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:46:02,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 1899 transitions. [2021-11-13 18:46:02,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-13 18:46:02,321 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:02,321 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:02,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 18:46:02,322 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:02,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:02,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1820670562, now seen corresponding path program 1 times [2021-11-13 18:46:02,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:02,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999699497] [2021-11-13 18:46:02,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:02,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:02,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:02,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:46:02,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:02,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:46:02,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:02,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 18:46:02,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:02,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 18:46:02,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:02,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 18:46:02,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:02,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:46:02,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:02,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999699497] [2021-11-13 18:46:02,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999699497] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:46:02,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:46:02,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:46:02,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529567801] [2021-11-13 18:46:02,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:46:02,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:46:02,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:02,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:46:02,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:46:02,505 INFO L87 Difference]: Start difference. First operand 1220 states and 1899 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:46:03,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:03,814 INFO L93 Difference]: Finished difference Result 2951 states and 4679 transitions. [2021-11-13 18:46:03,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:46:03,815 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 144 [2021-11-13 18:46:03,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:03,828 INFO L225 Difference]: With dead ends: 2951 [2021-11-13 18:46:03,828 INFO L226 Difference]: Without dead ends: 1748 [2021-11-13 18:46:03,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:46:03,834 INFO L933 BasicCegarLoop]: 478 mSDtfsCounter, 978 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 822.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 995 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.76ms SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1006.76ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:03,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [995 Valid, 1061 Invalid, 1074 Unknown, 0 Unchecked, 9.76ms Time], IncrementalHoareTripleChecker [94 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 1006.76ms Time] [2021-11-13 18:46:03,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2021-11-13 18:46:03,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 1220. [2021-11-13 18:46:03,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1220 states, 1110 states have (on average 1.5495495495495495) internal successors, (1720), 1116 states have internal predecessors, (1720), 80 states have call successors, (80), 24 states have call predecessors, (80), 29 states have return successors, (95), 83 states have call predecessors, (95), 80 states have call successors, (95) [2021-11-13 18:46:03,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 1895 transitions. [2021-11-13 18:46:03,976 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 1895 transitions. Word has length 144 [2021-11-13 18:46:03,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:03,977 INFO L470 AbstractCegarLoop]: Abstraction has 1220 states and 1895 transitions. [2021-11-13 18:46:03,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:46:03,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 1895 transitions. [2021-11-13 18:46:03,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-13 18:46:03,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:03,980 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:03,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 18:46:03,981 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:03,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:03,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1488027424, now seen corresponding path program 1 times [2021-11-13 18:46:03,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:03,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610081869] [2021-11-13 18:46:03,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:03,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:03,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:04,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:46:04,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:04,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:46:04,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:04,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 18:46:04,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:04,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 18:46:04,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:04,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 18:46:04,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:04,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:46:04,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:04,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610081869] [2021-11-13 18:46:04,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610081869] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:46:04,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:46:04,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:46:04,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082606440] [2021-11-13 18:46:04,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:46:04,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:46:04,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:04,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:46:04,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:46:04,123 INFO L87 Difference]: Start difference. First operand 1220 states and 1895 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:46:05,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:05,287 INFO L93 Difference]: Finished difference Result 2942 states and 4649 transitions. [2021-11-13 18:46:05,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:46:05,288 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 144 [2021-11-13 18:46:05,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:05,300 INFO L225 Difference]: With dead ends: 2942 [2021-11-13 18:46:05,300 INFO L226 Difference]: Without dead ends: 1739 [2021-11-13 18:46:05,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:46:05,305 INFO L933 BasicCegarLoop]: 474 mSDtfsCounter, 974 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 710.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 991 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.37ms SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 859.88ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:05,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [991 Valid, 1055 Invalid, 1068 Unknown, 0 Unchecked, 8.37ms Time], IncrementalHoareTripleChecker [96 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 859.88ms Time] [2021-11-13 18:46:05,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1739 states. [2021-11-13 18:46:05,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1739 to 1220. [2021-11-13 18:46:05,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1220 states, 1110 states have (on average 1.545945945945946) internal successors, (1716), 1116 states have internal predecessors, (1716), 80 states have call successors, (80), 24 states have call predecessors, (80), 29 states have return successors, (95), 83 states have call predecessors, (95), 80 states have call successors, (95) [2021-11-13 18:46:05,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 1891 transitions. [2021-11-13 18:46:05,433 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 1891 transitions. Word has length 144 [2021-11-13 18:46:05,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:05,433 INFO L470 AbstractCegarLoop]: Abstraction has 1220 states and 1891 transitions. [2021-11-13 18:46:05,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:46:05,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 1891 transitions. [2021-11-13 18:46:05,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-13 18:46:05,436 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:05,436 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:05,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 18:46:05,437 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:05,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:05,437 INFO L85 PathProgramCache]: Analyzing trace with hash -878007646, now seen corresponding path program 1 times [2021-11-13 18:46:05,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:05,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921025214] [2021-11-13 18:46:05,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:05,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:05,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:05,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:46:05,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:05,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:46:05,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:05,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 18:46:05,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:05,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 18:46:05,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:05,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 18:46:05,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:05,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:46:05,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:05,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921025214] [2021-11-13 18:46:05,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921025214] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:46:05,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:46:05,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:46:05,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662790597] [2021-11-13 18:46:05,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:46:05,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:46:05,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:05,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:46:05,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:46:05,573 INFO L87 Difference]: Start difference. First operand 1220 states and 1891 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:46:06,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:06,957 INFO L93 Difference]: Finished difference Result 2933 states and 4619 transitions. [2021-11-13 18:46:06,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:46:06,957 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 144 [2021-11-13 18:46:06,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:06,968 INFO L225 Difference]: With dead ends: 2933 [2021-11-13 18:46:06,969 INFO L226 Difference]: Without dead ends: 1730 [2021-11-13 18:46:06,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:46:06,975 INFO L933 BasicCegarLoop]: 470 mSDtfsCounter, 972 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 916.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 989 SdHoareTripleChecker+Valid, 1051 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.44ms SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1053.76ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:06,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [989 Valid, 1051 Invalid, 1058 Unknown, 0 Unchecked, 10.44ms Time], IncrementalHoareTripleChecker [96 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 1053.76ms Time] [2021-11-13 18:46:06,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1730 states. [2021-11-13 18:46:07,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1730 to 1220. [2021-11-13 18:46:07,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1220 states, 1110 states have (on average 1.5423423423423424) internal successors, (1712), 1116 states have internal predecessors, (1712), 80 states have call successors, (80), 24 states have call predecessors, (80), 29 states have return successors, (95), 83 states have call predecessors, (95), 80 states have call successors, (95) [2021-11-13 18:46:07,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 1887 transitions. [2021-11-13 18:46:07,114 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 1887 transitions. Word has length 144 [2021-11-13 18:46:07,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:07,115 INFO L470 AbstractCegarLoop]: Abstraction has 1220 states and 1887 transitions. [2021-11-13 18:46:07,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:46:07,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 1887 transitions. [2021-11-13 18:46:07,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-13 18:46:07,118 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:07,118 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:07,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-13 18:46:07,119 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:07,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:07,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1123878624, now seen corresponding path program 1 times [2021-11-13 18:46:07,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:07,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104876046] [2021-11-13 18:46:07,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:07,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:07,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:07,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:46:07,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:07,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:46:07,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:07,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 18:46:07,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:07,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 18:46:07,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:07,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 18:46:07,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:07,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:46:07,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:07,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104876046] [2021-11-13 18:46:07,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104876046] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:46:07,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:46:07,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 18:46:07,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165056361] [2021-11-13 18:46:07,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:46:07,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:46:07,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:07,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:46:07,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:46:07,332 INFO L87 Difference]: Start difference. First operand 1220 states and 1887 transitions. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 6 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:46:10,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:10,323 INFO L93 Difference]: Finished difference Result 5021 states and 7891 transitions. [2021-11-13 18:46:10,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 18:46:10,324 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 6 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 144 [2021-11-13 18:46:10,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:10,350 INFO L225 Difference]: With dead ends: 5021 [2021-11-13 18:46:10,350 INFO L226 Difference]: Without dead ends: 3818 [2021-11-13 18:46:10,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:46:10,357 INFO L933 BasicCegarLoop]: 724 mSDtfsCounter, 1867 mSDsluCounter, 1761 mSDsCounter, 0 mSdLazyCounter, 2043 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1816.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1895 SdHoareTripleChecker+Valid, 2485 SdHoareTripleChecker+Invalid, 2155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.88ms SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 2043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2121.56ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:10,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1895 Valid, 2485 Invalid, 2155 Unknown, 0 Unchecked, 22.88ms Time], IncrementalHoareTripleChecker [112 Valid, 2043 Invalid, 0 Unknown, 0 Unchecked, 2121.56ms Time] [2021-11-13 18:46:10,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3818 states. [2021-11-13 18:46:10,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3818 to 2488. [2021-11-13 18:46:10,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2268 states have (on average 1.552910052910053) internal successors, (3522), 2288 states have internal predecessors, (3522), 152 states have call successors, (152), 48 states have call predecessors, (152), 67 states have return successors, (215), 159 states have call predecessors, (215), 152 states have call successors, (215) [2021-11-13 18:46:10,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 3889 transitions. [2021-11-13 18:46:10,636 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 3889 transitions. Word has length 144 [2021-11-13 18:46:10,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:10,637 INFO L470 AbstractCegarLoop]: Abstraction has 2488 states and 3889 transitions. [2021-11-13 18:46:10,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 6 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:46:10,637 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 3889 transitions. [2021-11-13 18:46:10,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-13 18:46:10,641 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:10,641 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:10,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-13 18:46:10,641 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:10,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:10,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1443943710, now seen corresponding path program 1 times [2021-11-13 18:46:10,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:10,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625003682] [2021-11-13 18:46:10,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:10,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:10,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:10,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:46:10,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:10,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:46:10,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:10,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 18:46:10,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:10,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 18:46:10,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:10,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 18:46:10,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:10,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:46:10,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:10,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625003682] [2021-11-13 18:46:10,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625003682] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:46:10,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:46:10,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:46:10,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614700465] [2021-11-13 18:46:10,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:46:10,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:46:10,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:10,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:46:10,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:46:10,804 INFO L87 Difference]: Start difference. First operand 2488 states and 3889 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:46:12,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:12,275 INFO L93 Difference]: Finished difference Result 5988 states and 9483 transitions. [2021-11-13 18:46:12,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:46:12,276 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 144 [2021-11-13 18:46:12,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:12,298 INFO L225 Difference]: With dead ends: 5988 [2021-11-13 18:46:12,298 INFO L226 Difference]: Without dead ends: 3517 [2021-11-13 18:46:12,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:46:12,308 INFO L933 BasicCegarLoop]: 446 mSDtfsCounter, 994 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 802.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1011 SdHoareTripleChecker+Valid, 1025 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.71ms SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 957.14ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:12,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1011 Valid, 1025 Invalid, 1026 Unknown, 0 Unchecked, 9.71ms Time], IncrementalHoareTripleChecker [101 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 957.14ms Time] [2021-11-13 18:46:12,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3517 states. [2021-11-13 18:46:12,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3517 to 2488. [2021-11-13 18:46:12,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2268 states have (on average 1.5493827160493827) internal successors, (3514), 2288 states have internal predecessors, (3514), 152 states have call successors, (152), 48 states have call predecessors, (152), 67 states have return successors, (215), 159 states have call predecessors, (215), 152 states have call successors, (215) [2021-11-13 18:46:12,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 3881 transitions. [2021-11-13 18:46:12,629 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 3881 transitions. Word has length 144 [2021-11-13 18:46:12,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:12,630 INFO L470 AbstractCegarLoop]: Abstraction has 2488 states and 3881 transitions. [2021-11-13 18:46:12,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:46:12,630 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 3881 transitions. [2021-11-13 18:46:12,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-13 18:46:12,634 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:12,634 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:12,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-13 18:46:12,635 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:12,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:12,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1203660644, now seen corresponding path program 1 times [2021-11-13 18:46:12,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:12,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771552660] [2021-11-13 18:46:12,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:12,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:12,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:12,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:46:12,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:12,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:46:12,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:12,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 18:46:12,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:12,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 18:46:12,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:12,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 18:46:12,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:12,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:46:12,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:12,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771552660] [2021-11-13 18:46:12,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771552660] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:46:12,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:46:12,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:46:12,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513086682] [2021-11-13 18:46:12,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:46:12,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:46:12,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:12,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:46:12,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:46:12,763 INFO L87 Difference]: Start difference. First operand 2488 states and 3881 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:46:14,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:14,268 INFO L93 Difference]: Finished difference Result 5961 states and 9405 transitions. [2021-11-13 18:46:14,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:46:14,269 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 144 [2021-11-13 18:46:14,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:14,290 INFO L225 Difference]: With dead ends: 5961 [2021-11-13 18:46:14,291 INFO L226 Difference]: Without dead ends: 3490 [2021-11-13 18:46:14,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:46:14,303 INFO L933 BasicCegarLoop]: 455 mSDtfsCounter, 970 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 881.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 987 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.75ms SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1035.34ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:14,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [987 Valid, 1036 Invalid, 1029 Unknown, 0 Unchecked, 10.75ms Time], IncrementalHoareTripleChecker [99 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 1035.34ms Time] [2021-11-13 18:46:14,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3490 states. [2021-11-13 18:46:14,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3490 to 2488. [2021-11-13 18:46:14,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2268 states have (on average 1.5458553791887126) internal successors, (3506), 2288 states have internal predecessors, (3506), 152 states have call successors, (152), 48 states have call predecessors, (152), 67 states have return successors, (215), 159 states have call predecessors, (215), 152 states have call successors, (215) [2021-11-13 18:46:14,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 3873 transitions. [2021-11-13 18:46:14,634 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 3873 transitions. Word has length 144 [2021-11-13 18:46:14,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:14,634 INFO L470 AbstractCegarLoop]: Abstraction has 2488 states and 3873 transitions. [2021-11-13 18:46:14,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:46:14,635 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 3873 transitions. [2021-11-13 18:46:14,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-13 18:46:14,638 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:14,638 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:14,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-13 18:46:14,639 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:14,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:14,639 INFO L85 PathProgramCache]: Analyzing trace with hash -927690078, now seen corresponding path program 1 times [2021-11-13 18:46:14,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:14,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430545330] [2021-11-13 18:46:14,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:14,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:14,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:14,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:46:14,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:14,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:46:14,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:14,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 18:46:14,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:14,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 18:46:14,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:14,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 18:46:14,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:14,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:46:14,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:14,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430545330] [2021-11-13 18:46:14,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430545330] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:46:14,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:46:14,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:46:14,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029157592] [2021-11-13 18:46:14,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:46:14,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:46:14,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:14,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:46:14,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:46:14,776 INFO L87 Difference]: Start difference. First operand 2488 states and 3873 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:46:16,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:16,186 INFO L93 Difference]: Finished difference Result 5934 states and 9327 transitions. [2021-11-13 18:46:16,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:46:16,187 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 144 [2021-11-13 18:46:16,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:16,209 INFO L225 Difference]: With dead ends: 5934 [2021-11-13 18:46:16,210 INFO L226 Difference]: Without dead ends: 3463 [2021-11-13 18:46:16,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:46:16,219 INFO L933 BasicCegarLoop]: 451 mSDtfsCounter, 968 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 783.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 985 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.06ms SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 936.51ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:16,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [985 Valid, 1032 Invalid, 1019 Unknown, 0 Unchecked, 9.06ms Time], IncrementalHoareTripleChecker [99 Valid, 920 Invalid, 0 Unknown, 0 Unchecked, 936.51ms Time] [2021-11-13 18:46:16,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3463 states. [2021-11-13 18:46:16,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3463 to 2488. [2021-11-13 18:46:16,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2268 states have (on average 1.5423280423280423) internal successors, (3498), 2288 states have internal predecessors, (3498), 152 states have call successors, (152), 48 states have call predecessors, (152), 67 states have return successors, (215), 159 states have call predecessors, (215), 152 states have call successors, (215) [2021-11-13 18:46:16,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 3865 transitions. [2021-11-13 18:46:16,598 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 3865 transitions. Word has length 144 [2021-11-13 18:46:16,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:16,599 INFO L470 AbstractCegarLoop]: Abstraction has 2488 states and 3865 transitions. [2021-11-13 18:46:16,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:46:16,600 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 3865 transitions. [2021-11-13 18:46:16,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-13 18:46:16,605 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:16,605 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:16,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-13 18:46:16,605 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:16,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:16,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1966274652, now seen corresponding path program 1 times [2021-11-13 18:46:16,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:16,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188850430] [2021-11-13 18:46:16,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:16,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:16,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:16,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:46:16,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:16,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:46:16,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:16,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 18:46:16,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:16,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 18:46:16,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:16,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 18:46:16,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:16,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:46:16,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:16,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188850430] [2021-11-13 18:46:16,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188850430] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:46:16,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:46:16,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:46:16,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559312707] [2021-11-13 18:46:16,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:46:16,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:46:16,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:16,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:46:16,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:46:16,748 INFO L87 Difference]: Start difference. First operand 2488 states and 3865 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:46:18,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:18,109 INFO L93 Difference]: Finished difference Result 5907 states and 9249 transitions. [2021-11-13 18:46:18,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:46:18,109 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 144 [2021-11-13 18:46:18,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:18,140 INFO L225 Difference]: With dead ends: 5907 [2021-11-13 18:46:18,141 INFO L226 Difference]: Without dead ends: 3436 [2021-11-13 18:46:18,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:46:18,149 INFO L933 BasicCegarLoop]: 447 mSDtfsCounter, 837 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 788.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 854 SdHoareTripleChecker+Valid, 1183 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.63ms SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 934.42ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:18,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [854 Valid, 1183 Invalid, 1095 Unknown, 0 Unchecked, 8.63ms Time], IncrementalHoareTripleChecker [76 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 934.42ms Time] [2021-11-13 18:46:18,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3436 states. [2021-11-13 18:46:18,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3436 to 2488. [2021-11-13 18:46:18,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2268 states have (on average 1.5388007054673722) internal successors, (3490), 2288 states have internal predecessors, (3490), 152 states have call successors, (152), 48 states have call predecessors, (152), 67 states have return successors, (215), 159 states have call predecessors, (215), 152 states have call successors, (215) [2021-11-13 18:46:18,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 3857 transitions. [2021-11-13 18:46:18,433 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 3857 transitions. Word has length 144 [2021-11-13 18:46:18,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:18,433 INFO L470 AbstractCegarLoop]: Abstraction has 2488 states and 3857 transitions. [2021-11-13 18:46:18,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:46:18,434 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 3857 transitions. [2021-11-13 18:46:18,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-13 18:46:18,437 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:18,437 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:18,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-13 18:46:18,437 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:18,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:18,438 INFO L85 PathProgramCache]: Analyzing trace with hash 355527266, now seen corresponding path program 1 times [2021-11-13 18:46:18,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:18,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506239465] [2021-11-13 18:46:18,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:18,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:18,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:18,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:46:18,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:18,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:46:18,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:18,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 18:46:18,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:18,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 18:46:18,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:18,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 18:46:18,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:18,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:46:18,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:18,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506239465] [2021-11-13 18:46:18,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506239465] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:46:18,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:46:18,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 18:46:18,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388373081] [2021-11-13 18:46:18,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:46:18,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:46:18,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:18,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:46:18,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:46:18,585 INFO L87 Difference]: Start difference. First operand 2488 states and 3857 transitions. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 6 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:46:21,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:21,954 INFO L93 Difference]: Finished difference Result 9421 states and 14815 transitions. [2021-11-13 18:46:21,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 18:46:21,955 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 6 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 144 [2021-11-13 18:46:21,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:21,992 INFO L225 Difference]: With dead ends: 9421 [2021-11-13 18:46:21,992 INFO L226 Difference]: Without dead ends: 6950 [2021-11-13 18:46:22,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:46:22,002 INFO L933 BasicCegarLoop]: 720 mSDtfsCounter, 1229 mSDsluCounter, 2050 mSDsCounter, 0 mSdLazyCounter, 2333 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1934.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1245 SdHoareTripleChecker+Valid, 2770 SdHoareTripleChecker+Invalid, 2417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.17ms SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2239.81ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:22,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1245 Valid, 2770 Invalid, 2417 Unknown, 0 Unchecked, 24.17ms Time], IncrementalHoareTripleChecker [84 Valid, 2333 Invalid, 0 Unknown, 0 Unchecked, 2239.81ms Time] [2021-11-13 18:46:22,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6950 states. [2021-11-13 18:46:22,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6950 to 5012. [2021-11-13 18:46:22,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5012 states, 4558 states have (on average 1.5383940324703818) internal successors, (7012), 4624 states have internal predecessors, (7012), 292 states have call successors, (292), 96 states have call predecessors, (292), 161 states have return successors, (547), 307 states have call predecessors, (547), 292 states have call successors, (547) [2021-11-13 18:46:22,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5012 states to 5012 states and 7851 transitions. [2021-11-13 18:46:22,700 INFO L78 Accepts]: Start accepts. Automaton has 5012 states and 7851 transitions. Word has length 144 [2021-11-13 18:46:22,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:22,701 INFO L470 AbstractCegarLoop]: Abstraction has 5012 states and 7851 transitions. [2021-11-13 18:46:22,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 6 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:46:22,701 INFO L276 IsEmpty]: Start isEmpty. Operand 5012 states and 7851 transitions. [2021-11-13 18:46:22,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-13 18:46:22,707 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:22,708 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:22,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-13 18:46:22,708 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:22,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:22,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1786333212, now seen corresponding path program 1 times [2021-11-13 18:46:22,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:22,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807781052] [2021-11-13 18:46:22,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:22,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:22,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:22,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:46:22,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:22,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:46:22,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:22,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 18:46:22,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:22,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 18:46:22,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:22,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 18:46:22,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:22,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:46:22,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:22,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807781052] [2021-11-13 18:46:22,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807781052] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:46:22,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:46:22,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:46:22,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388195059] [2021-11-13 18:46:22,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:46:22,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:46:22,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:22,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:46:22,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:46:22,848 INFO L87 Difference]: Start difference. First operand 5012 states and 7851 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:46:24,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:24,582 INFO L93 Difference]: Finished difference Result 11849 states and 18671 transitions. [2021-11-13 18:46:24,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:46:24,582 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 144 [2021-11-13 18:46:24,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:24,605 INFO L225 Difference]: With dead ends: 11849 [2021-11-13 18:46:24,605 INFO L226 Difference]: Without dead ends: 6854 [2021-11-13 18:46:24,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:46:24,620 INFO L933 BasicCegarLoop]: 441 mSDtfsCounter, 836 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 828.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 853 SdHoareTripleChecker+Valid, 1177 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.94ms SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 979.84ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:24,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [853 Valid, 1177 Invalid, 1071 Unknown, 0 Unchecked, 8.94ms Time], IncrementalHoareTripleChecker [74 Valid, 997 Invalid, 0 Unknown, 0 Unchecked, 979.84ms Time] [2021-11-13 18:46:24,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6854 states. [2021-11-13 18:46:25,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6854 to 5012. [2021-11-13 18:46:25,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5012 states, 4558 states have (on average 1.5348837209302326) internal successors, (6996), 4624 states have internal predecessors, (6996), 292 states have call successors, (292), 96 states have call predecessors, (292), 161 states have return successors, (547), 307 states have call predecessors, (547), 292 states have call successors, (547) [2021-11-13 18:46:25,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5012 states to 5012 states and 7835 transitions. [2021-11-13 18:46:25,153 INFO L78 Accepts]: Start accepts. Automaton has 5012 states and 7835 transitions. Word has length 144 [2021-11-13 18:46:25,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:25,153 INFO L470 AbstractCegarLoop]: Abstraction has 5012 states and 7835 transitions. [2021-11-13 18:46:25,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:46:25,154 INFO L276 IsEmpty]: Start isEmpty. Operand 5012 states and 7835 transitions. [2021-11-13 18:46:25,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-13 18:46:25,158 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:25,158 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:25,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-13 18:46:25,159 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:25,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:25,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1885352482, now seen corresponding path program 1 times [2021-11-13 18:46:25,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:25,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942619612] [2021-11-13 18:46:25,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:25,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:25,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:25,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:46:25,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:25,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:46:25,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:25,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 18:46:25,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:25,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 18:46:25,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:25,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 18:46:25,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:25,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:46:25,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:25,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942619612] [2021-11-13 18:46:25,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942619612] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:46:25,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:46:25,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:46:25,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878098009] [2021-11-13 18:46:25,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:46:25,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:46:25,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:25,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:46:25,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:46:25,279 INFO L87 Difference]: Start difference. First operand 5012 states and 7835 transitions. Second operand has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 4 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:46:28,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:28,531 INFO L93 Difference]: Finished difference Result 18293 states and 28727 transitions. [2021-11-13 18:46:28,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:46:28,532 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 4 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 144 [2021-11-13 18:46:28,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:28,576 INFO L225 Difference]: With dead ends: 18293 [2021-11-13 18:46:28,576 INFO L226 Difference]: Without dead ends: 13299 [2021-11-13 18:46:28,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:46:28,598 INFO L933 BasicCegarLoop]: 929 mSDtfsCounter, 1468 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 1759 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1504.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1506 SdHoareTripleChecker+Valid, 1923 SdHoareTripleChecker+Invalid, 1866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.09ms SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1745.21ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:28,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1506 Valid, 1923 Invalid, 1866 Unknown, 0 Unchecked, 17.09ms Time], IncrementalHoareTripleChecker [107 Valid, 1759 Invalid, 0 Unknown, 0 Unchecked, 1745.21ms Time] [2021-11-13 18:46:28,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13299 states. [2021-11-13 18:46:29,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13299 to 9923. [2021-11-13 18:46:29,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9923 states, 9020 states have (on average 1.5289356984478937) internal successors, (13791), 9167 states have internal predecessors, (13791), 580 states have call successors, (580), 192 states have call predecessors, (580), 322 states have return successors, (1075), 579 states have call predecessors, (1075), 580 states have call successors, (1075) [2021-11-13 18:46:29,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9923 states to 9923 states and 15446 transitions. [2021-11-13 18:46:29,608 INFO L78 Accepts]: Start accepts. Automaton has 9923 states and 15446 transitions. Word has length 144 [2021-11-13 18:46:29,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:29,608 INFO L470 AbstractCegarLoop]: Abstraction has 9923 states and 15446 transitions. [2021-11-13 18:46:29,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 4 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:46:29,609 INFO L276 IsEmpty]: Start isEmpty. Operand 9923 states and 15446 transitions. [2021-11-13 18:46:29,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-11-13 18:46:29,634 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:29,634 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:29,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-13 18:46:29,635 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:29,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:29,636 INFO L85 PathProgramCache]: Analyzing trace with hash 523957105, now seen corresponding path program 1 times [2021-11-13 18:46:29,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:29,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539010189] [2021-11-13 18:46:29,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:29,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:29,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:29,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:46:29,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:29,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:46:29,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:29,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 18:46:29,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:29,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 18:46:29,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:29,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 18:46:29,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:29,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-11-13 18:46:29,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:29,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:46:29,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:29,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2021-11-13 18:46:29,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:29,835 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 18:46:29,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:29,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539010189] [2021-11-13 18:46:29,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539010189] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:46:29,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378238008] [2021-11-13 18:46:29,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:29,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:46:29,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c494f22-6459-423e-9a2e-b9fbb40f1363/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:46:29,838 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c494f22-6459-423e-9a2e-b9fbb40f1363/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:46:29,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c494f22-6459-423e-9a2e-b9fbb40f1363/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:46:30,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:30,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 969 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:46:30,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:30,653 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 18:46:30,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:46:30,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378238008] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:46:30,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:46:30,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-11-13 18:46:30,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6046069] [2021-11-13 18:46:30,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:46:30,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:46:30,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:30,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:46:30,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:46:30,662 INFO L87 Difference]: Start difference. First operand 9923 states and 15446 transitions. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:46:32,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:32,963 INFO L93 Difference]: Finished difference Result 29620 states and 46470 transitions. [2021-11-13 18:46:32,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:46:32,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 235 [2021-11-13 18:46:32,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:33,038 INFO L225 Difference]: With dead ends: 29620 [2021-11-13 18:46:33,038 INFO L226 Difference]: Without dead ends: 19715 [2021-11-13 18:46:33,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:46:33,066 INFO L933 BasicCegarLoop]: 469 mSDtfsCounter, 360 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.22ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.30ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:33,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 885 Invalid, 12 Unknown, 0 Unchecked, 2.22ms Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 9.30ms Time] [2021-11-13 18:46:33,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19715 states. [2021-11-13 18:46:34,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19715 to 19649. [2021-11-13 18:46:34,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19649 states, 17864 states have (on average 1.528269144648455) internal successors, (27301), 18157 states have internal predecessors, (27301), 1140 states have call successors, (1140), 384 states have call predecessors, (1140), 644 states have return successors, (2115), 1123 states have call predecessors, (2115), 1140 states have call successors, (2115) [2021-11-13 18:46:34,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19649 states to 19649 states and 30556 transitions. [2021-11-13 18:46:34,864 INFO L78 Accepts]: Start accepts. Automaton has 19649 states and 30556 transitions. Word has length 235 [2021-11-13 18:46:34,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:34,865 INFO L470 AbstractCegarLoop]: Abstraction has 19649 states and 30556 transitions. [2021-11-13 18:46:34,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:46:34,866 INFO L276 IsEmpty]: Start isEmpty. Operand 19649 states and 30556 transitions. [2021-11-13 18:46:34,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-11-13 18:46:34,912 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:34,912 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:34,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c494f22-6459-423e-9a2e-b9fbb40f1363/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:46:35,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c494f22-6459-423e-9a2e-b9fbb40f1363/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:46:35,127 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:35,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:35,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1295500207, now seen corresponding path program 1 times [2021-11-13 18:46:35,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:35,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754607250] [2021-11-13 18:46:35,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:35,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:35,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:35,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:46:35,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:35,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:46:35,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:35,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 18:46:35,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:35,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 18:46:35,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:35,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 18:46:35,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:35,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-11-13 18:46:35,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:35,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:46:35,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:35,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2021-11-13 18:46:35,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:35,342 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 18:46:35,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:35,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754607250] [2021-11-13 18:46:35,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754607250] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:46:35,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286712428] [2021-11-13 18:46:35,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:35,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:46:35,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c494f22-6459-423e-9a2e-b9fbb40f1363/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:46:35,345 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c494f22-6459-423e-9a2e-b9fbb40f1363/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:46:35,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c494f22-6459-423e-9a2e-b9fbb40f1363/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:46:35,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:35,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:46:35,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:36,073 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 18:46:36,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:46:36,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286712428] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:46:36,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:46:36,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-11-13 18:46:36,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072630970] [2021-11-13 18:46:36,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:46:36,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:46:36,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:36,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:46:36,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:46:36,078 INFO L87 Difference]: Start difference. First operand 19649 states and 30556 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:46:39,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:39,686 INFO L93 Difference]: Finished difference Result 58590 states and 91832 transitions. [2021-11-13 18:46:39,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:46:39,688 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 235 [2021-11-13 18:46:39,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:39,858 INFO L225 Difference]: With dead ends: 58590 [2021-11-13 18:46:39,858 INFO L226 Difference]: Without dead ends: 38959 [2021-11-13 18:46:39,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:46:39,913 INFO L933 BasicCegarLoop]: 469 mSDtfsCounter, 372 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.12ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.08ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:39,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 885 Invalid, 12 Unknown, 0 Unchecked, 2.12ms Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 9.08ms Time] [2021-11-13 18:46:39,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38959 states. [2021-11-13 18:46:43,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38959 to 38829. [2021-11-13 18:46:43,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38829 states, 35328 states have (on average 1.5285609148550725) internal successors, (54001), 35913 states have internal predecessors, (54001), 2212 states have call successors, (2212), 768 states have call predecessors, (2212), 1288 states have return successors, (4147), 2163 states have call predecessors, (4147), 2212 states have call successors, (4147) [2021-11-13 18:46:43,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38829 states to 38829 states and 60360 transitions. [2021-11-13 18:46:43,785 INFO L78 Accepts]: Start accepts. Automaton has 38829 states and 60360 transitions. Word has length 235 [2021-11-13 18:46:43,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:43,786 INFO L470 AbstractCegarLoop]: Abstraction has 38829 states and 60360 transitions. [2021-11-13 18:46:43,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:46:43,786 INFO L276 IsEmpty]: Start isEmpty. Operand 38829 states and 60360 transitions. [2021-11-13 18:46:43,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-11-13 18:46:43,855 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:43,855 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:43,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c494f22-6459-423e-9a2e-b9fbb40f1363/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:46:44,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c494f22-6459-423e-9a2e-b9fbb40f1363/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:46:44,079 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:44,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:44,080 INFO L85 PathProgramCache]: Analyzing trace with hash -414239439, now seen corresponding path program 1 times [2021-11-13 18:46:44,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:44,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933766487] [2021-11-13 18:46:44,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:44,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:44,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:44,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:46:44,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:44,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:46:44,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:44,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 18:46:44,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:44,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 18:46:44,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:44,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 18:46:44,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:44,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-11-13 18:46:44,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:44,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:46:44,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:44,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2021-11-13 18:46:44,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:44,287 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 18:46:44,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:44,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933766487] [2021-11-13 18:46:44,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933766487] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:46:44,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766577537] [2021-11-13 18:46:44,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:44,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:46:44,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c494f22-6459-423e-9a2e-b9fbb40f1363/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:46:44,290 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c494f22-6459-423e-9a2e-b9fbb40f1363/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:46:44,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c494f22-6459-423e-9a2e-b9fbb40f1363/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:46:44,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:44,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 957 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:46:44,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:44,914 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-13 18:46:44,914 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:46:44,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766577537] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:46:44,915 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:46:44,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-11-13 18:46:44,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001849798] [2021-11-13 18:46:44,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:46:44,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:46:44,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:44,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:46:44,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:46:44,917 INFO L87 Difference]: Start difference. First operand 38829 states and 60360 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:46:51,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:51,548 INFO L93 Difference]: Finished difference Result 115810 states and 181420 transitions. [2021-11-13 18:46:51,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:46:51,549 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 235 [2021-11-13 18:46:51,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:51,872 INFO L225 Difference]: With dead ends: 115810 [2021-11-13 18:46:51,873 INFO L226 Difference]: Without dead ends: 76999 [2021-11-13 18:46:52,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:46:52,015 INFO L933 BasicCegarLoop]: 469 mSDtfsCounter, 390 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.21ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.53ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:52,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 885 Invalid, 12 Unknown, 0 Unchecked, 2.21ms Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 19.53ms Time] [2021-11-13 18:46:52,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76999 states. [2021-11-13 18:47:00,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76999 to 76741. [2021-11-13 18:47:00,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76741 states, 69872 states have (on average 1.5288670712159378) internal successors, (106825), 71041 states have internal predecessors, (106825), 4292 states have call successors, (4292), 1536 states have call predecessors, (4292), 2576 states have return successors, (8147), 4179 states have call predecessors, (8147), 4292 states have call successors, (8147) [2021-11-13 18:47:00,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76741 states to 76741 states and 119264 transitions. [2021-11-13 18:47:00,920 INFO L78 Accepts]: Start accepts. Automaton has 76741 states and 119264 transitions. Word has length 235 [2021-11-13 18:47:00,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:00,921 INFO L470 AbstractCegarLoop]: Abstraction has 76741 states and 119264 transitions. [2021-11-13 18:47:00,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:47:00,921 INFO L276 IsEmpty]: Start isEmpty. Operand 76741 states and 119264 transitions. [2021-11-13 18:47:01,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-11-13 18:47:01,037 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:01,038 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:01,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c494f22-6459-423e-9a2e-b9fbb40f1363/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:01,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c494f22-6459-423e-9a2e-b9fbb40f1363/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:01,267 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:01,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:01,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1243461137, now seen corresponding path program 1 times [2021-11-13 18:47:01,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:01,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198869851] [2021-11-13 18:47:01,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:01,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:01,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:01,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:47:01,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:01,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:47:01,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:01,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 18:47:01,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:01,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 18:47:01,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:01,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 18:47:01,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:01,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-11-13 18:47:01,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:01,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:47:01,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:01,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2021-11-13 18:47:01,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:01,458 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 18:47:01,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:01,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198869851] [2021-11-13 18:47:01,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198869851] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:01,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881554320] [2021-11-13 18:47:01,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:01,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:01,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c494f22-6459-423e-9a2e-b9fbb40f1363/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:01,463 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c494f22-6459-423e-9a2e-b9fbb40f1363/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:01,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c494f22-6459-423e-9a2e-b9fbb40f1363/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 18:47:01,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:01,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 951 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:47:01,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:02,082 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 18:47:02,083 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:47:02,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881554320] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:47:02,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:47:02,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-11-13 18:47:02,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954863131] [2021-11-13 18:47:02,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:47:02,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:47:02,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:02,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:47:02,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:47:02,088 INFO L87 Difference]: Start difference. First operand 76741 states and 119264 transitions. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7)