./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label08.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fabfe14-4573-4826-b51f-67712f60cf37/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fabfe14-4573-4826-b51f-67712f60cf37/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fabfe14-4573-4826-b51f-67712f60cf37/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fabfe14-4573-4826-b51f-67712f60cf37/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label08.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fabfe14-4573-4826-b51f-67712f60cf37/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fabfe14-4573-4826-b51f-67712f60cf37/bin/uautomizer-wIGwrQj20G --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 85ec1c32c0315a0b22a6354a237ce844fc6c407025c71f81c9bc5a5f9bf4b125 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 12:42:50,434 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 12:42:50,437 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 12:42:50,504 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 12:42:50,505 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 12:42:50,511 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 12:42:50,514 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 12:42:50,519 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 12:42:50,523 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 12:42:50,533 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 12:42:50,534 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 12:42:50,537 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 12:42:50,538 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 12:42:50,542 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 12:42:50,546 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 12:42:50,553 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 12:42:50,556 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 12:42:50,558 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 12:42:50,562 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 12:42:50,568 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 12:42:50,573 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 12:42:50,575 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 12:42:50,579 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 12:42:50,580 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 12:42:50,588 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 12:42:50,588 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 12:42:50,589 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 12:42:50,590 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 12:42:50,591 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 12:42:50,592 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 12:42:50,592 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 12:42:50,593 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 12:42:50,594 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 12:42:50,595 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 12:42:50,597 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 12:42:50,597 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 12:42:50,597 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 12:42:50,598 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 12:42:50,598 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 12:42:50,599 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 12:42:50,600 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 12:42:50,601 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fabfe14-4573-4826-b51f-67712f60cf37/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 12:42:50,635 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 12:42:50,636 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 12:42:50,636 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 12:42:50,637 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 12:42:50,638 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 12:42:50,638 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 12:42:50,639 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 12:42:50,639 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 12:42:50,639 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 12:42:50,640 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 12:42:50,640 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 12:42:50,640 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 12:42:50,641 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 12:42:50,641 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 12:42:50,641 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 12:42:50,642 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 12:42:50,642 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 12:42:50,642 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 12:42:50,642 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 12:42:50,643 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 12:42:50,643 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 12:42:50,643 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 12:42:50,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:42:50,644 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 12:42:50,644 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 12:42:50,645 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 12:42:50,645 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 12:42:50,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 12:42:50,646 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 12:42:50,646 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 12:42:50,646 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 12:42:50,647 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 12:42:50,647 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_5fabfe14-4573-4826-b51f-67712f60cf37/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fabfe14-4573-4826-b51f-67712f60cf37/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85ec1c32c0315a0b22a6354a237ce844fc6c407025c71f81c9bc5a5f9bf4b125 [2021-11-23 12:42:50,977 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 12:42:51,007 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 12:42:51,011 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 12:42:51,012 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 12:42:51,013 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 12:42:51,015 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fabfe14-4573-4826-b51f-67712f60cf37/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label08.c [2021-11-23 12:42:51,103 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fabfe14-4573-4826-b51f-67712f60cf37/bin/uautomizer-wIGwrQj20G/data/df3ef1d73/fe60965a86df4db091b46353ac97a4ad/FLAG84b73da08 [2021-11-23 12:42:52,148 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 12:42:52,151 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fabfe14-4573-4826-b51f-67712f60cf37/sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label08.c [2021-11-23 12:42:52,196 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fabfe14-4573-4826-b51f-67712f60cf37/bin/uautomizer-wIGwrQj20G/data/df3ef1d73/fe60965a86df4db091b46353ac97a4ad/FLAG84b73da08 [2021-11-23 12:42:52,576 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fabfe14-4573-4826-b51f-67712f60cf37/bin/uautomizer-wIGwrQj20G/data/df3ef1d73/fe60965a86df4db091b46353ac97a4ad [2021-11-23 12:42:52,578 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 12:42:52,580 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 12:42:52,585 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 12:42:52,585 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 12:42:52,590 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 12:42:52,591 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:42:52" (1/1) ... [2021-11-23 12:42:52,592 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42989a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:42:52, skipping insertion in model container [2021-11-23 12:42:52,592 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:42:52" (1/1) ... [2021-11-23 12:42:52,599 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 12:42:52,766 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 12:42:53,278 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fabfe14-4573-4826-b51f-67712f60cf37/sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label08.c[15482,15495] [2021-11-23 12:42:53,332 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fabfe14-4573-4826-b51f-67712f60cf37/sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label08.c[18989,19002] [2021-11-23 12:42:54,646 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:42:54,659 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 12:42:54,724 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fabfe14-4573-4826-b51f-67712f60cf37/sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label08.c[15482,15495] [2021-11-23 12:42:54,734 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fabfe14-4573-4826-b51f-67712f60cf37/sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label08.c[18989,19002] [2021-11-23 12:42:55,748 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:42:55,788 INFO L208 MainTranslator]: Completed translation [2021-11-23 12:42:55,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:42:55 WrapperNode [2021-11-23 12:42:55,789 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 12:42:55,790 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 12:42:55,791 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 12:42:55,791 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 12:42:55,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:42:55" (1/1) ... [2021-11-23 12:42:55,890 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:42:55" (1/1) ... [2021-11-23 12:42:56,408 INFO L137 Inliner]: procedures = 37, calls = 23, calls flagged for inlining = 18, calls inlined = 18, statements flattened = 5149 [2021-11-23 12:42:56,409 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 12:42:56,409 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 12:42:56,410 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 12:42:56,410 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 12:42:56,418 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:42:55" (1/1) ... [2021-11-23 12:42:56,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:42:55" (1/1) ... [2021-11-23 12:42:56,481 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:42:55" (1/1) ... [2021-11-23 12:42:56,482 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:42:55" (1/1) ... [2021-11-23 12:42:56,735 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:42:55" (1/1) ... [2021-11-23 12:42:56,790 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:42:55" (1/1) ... [2021-11-23 12:42:56,818 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:42:55" (1/1) ... [2021-11-23 12:42:56,953 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 12:42:56,955 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 12:42:56,963 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 12:42:56,963 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 12:42:56,975 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:42:55" (1/1) ... [2021-11-23 12:42:56,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:42:57,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fabfe14-4573-4826-b51f-67712f60cf37/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:42:57,029 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fabfe14-4573-4826-b51f-67712f60cf37/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 12:42:57,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fabfe14-4573-4826-b51f-67712f60cf37/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 12:42:57,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 12:42:57,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 12:42:57,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 12:42:57,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 12:42:57,452 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 12:42:57,454 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 12:43:03,191 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 12:43:03,221 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 12:43:03,221 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 12:43:03,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:43:03 BoogieIcfgContainer [2021-11-23 12:43:03,226 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 12:43:03,229 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 12:43:03,229 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 12:43:03,233 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 12:43:03,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 12:42:52" (1/3) ... [2021-11-23 12:43:03,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eda6bca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:43:03, skipping insertion in model container [2021-11-23 12:43:03,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:42:55" (2/3) ... [2021-11-23 12:43:03,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eda6bca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:43:03, skipping insertion in model container [2021-11-23 12:43:03,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:43:03" (3/3) ... [2021-11-23 12:43:03,238 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label08.c [2021-11-23 12:43:03,245 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 12:43:03,246 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 12:43:03,321 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 12:43:03,331 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 [2021-11-23 12:43:03,331 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 12:43:03,381 INFO L276 IsEmpty]: Start isEmpty. Operand has 926 states, 923 states have (on average 1.8992416034669555) internal successors, (1753), 925 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:03,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 12:43:03,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:43:03,393 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] [2021-11-23 12:43:03,394 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:43:03,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:43:03,401 INFO L85 PathProgramCache]: Analyzing trace with hash -124772307, now seen corresponding path program 1 times [2021-11-23 12:43:03,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:43:03,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247463563] [2021-11-23 12:43:03,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:43:03,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:43:03,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:43:03,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:43:03,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:43:03,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247463563] [2021-11-23 12:43:03,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247463563] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:43:03,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:43:03,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 12:43:03,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425177343] [2021-11-23 12:43:03,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:43:03,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:43:03,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:43:03,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:43:03,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:43:03,772 INFO L87 Difference]: Start difference. First operand has 926 states, 923 states have (on average 1.8992416034669555) internal successors, (1753), 925 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:09,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:43:09,210 INFO L93 Difference]: Finished difference Result 2577 states and 4936 transitions. [2021-11-23 12:43:09,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:43:09,212 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-23 12:43:09,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:43:09,249 INFO L225 Difference]: With dead ends: 2577 [2021-11-23 12:43:09,249 INFO L226 Difference]: Without dead ends: 1611 [2021-11-23 12:43:09,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:43:09,265 INFO L933 BasicCegarLoop]: 700 mSDtfsCounter, 975 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2337 mSolverCounterSat, 696 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 975 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 3033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 696 IncrementalHoareTripleChecker+Valid, 2337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:43:09,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [975 Valid, 711 Invalid, 3033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [696 Valid, 2337 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-11-23 12:43:09,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2021-11-23 12:43:09,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1611. [2021-11-23 12:43:09,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1611 states, 1609 states have (on average 1.615288999378496) internal successors, (2599), 1610 states have internal predecessors, (2599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:09,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 2599 transitions. [2021-11-23 12:43:09,439 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 2599 transitions. Word has length 30 [2021-11-23 12:43:09,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:43:09,440 INFO L470 AbstractCegarLoop]: Abstraction has 1611 states and 2599 transitions. [2021-11-23 12:43:09,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:09,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 2599 transitions. [2021-11-23 12:43:09,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-23 12:43:09,443 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:43:09,444 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] [2021-11-23 12:43:09,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 12:43:09,445 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:43:09,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:43:09,446 INFO L85 PathProgramCache]: Analyzing trace with hash 615382892, now seen corresponding path program 1 times [2021-11-23 12:43:09,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:43:09,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762993807] [2021-11-23 12:43:09,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:43:09,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:43:09,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:43:09,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:43:09,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:43:09,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762993807] [2021-11-23 12:43:09,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762993807] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:43:09,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:43:09,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 12:43:09,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905132961] [2021-11-23 12:43:09,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:43:09,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:43:09,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:43:09,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:43:09,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:43:09,776 INFO L87 Difference]: Start difference. First operand 1611 states and 2599 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:09,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:43:09,896 INFO L93 Difference]: Finished difference Result 1675 states and 2698 transitions. [2021-11-23 12:43:09,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 12:43:09,896 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-23 12:43:09,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:43:09,909 INFO L225 Difference]: With dead ends: 1675 [2021-11-23 12:43:09,909 INFO L226 Difference]: Without dead ends: 1611 [2021-11-23 12:43:09,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:43:09,913 INFO L933 BasicCegarLoop]: 1618 mSDtfsCounter, 3 mSDsluCounter, 4811 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6429 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:43:09,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6429 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:43:09,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2021-11-23 12:43:09,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1611. [2021-11-23 12:43:09,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1611 states, 1609 states have (on average 1.5904288377874456) internal successors, (2559), 1610 states have internal predecessors, (2559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:09,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 2559 transitions. [2021-11-23 12:43:09,977 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 2559 transitions. Word has length 38 [2021-11-23 12:43:09,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:43:09,977 INFO L470 AbstractCegarLoop]: Abstraction has 1611 states and 2559 transitions. [2021-11-23 12:43:09,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:09,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 2559 transitions. [2021-11-23 12:43:09,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 12:43:09,982 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:43:09,983 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] [2021-11-23 12:43:09,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 12:43:09,984 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:43:09,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:43:09,985 INFO L85 PathProgramCache]: Analyzing trace with hash -2101054792, now seen corresponding path program 1 times [2021-11-23 12:43:09,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:43:09,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692617359] [2021-11-23 12:43:09,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:43:09,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:43:10,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:43:10,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:43:10,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:43:10,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692617359] [2021-11-23 12:43:10,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692617359] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:43:10,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:43:10,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:43:10,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491771578] [2021-11-23 12:43:10,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:43:10,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:43:10,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:43:10,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:43:10,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:43:10,141 INFO L87 Difference]: Start difference. First operand 1611 states and 2559 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:10,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:43:10,193 INFO L93 Difference]: Finished difference Result 1725 states and 2739 transitions. [2021-11-23 12:43:10,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:43:10,194 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-23 12:43:10,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:43:10,207 INFO L225 Difference]: With dead ends: 1725 [2021-11-23 12:43:10,207 INFO L226 Difference]: Without dead ends: 1665 [2021-11-23 12:43:10,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:43:10,210 INFO L933 BasicCegarLoop]: 1661 mSDtfsCounter, 1524 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1524 SdHoareTripleChecker+Valid, 1754 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:43:10,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1524 Valid, 1754 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:43:10,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2021-11-23 12:43:10,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1663. [2021-11-23 12:43:10,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1661 states have (on average 1.5906080674292595) internal successors, (2642), 1662 states have internal predecessors, (2642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:10,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 2642 transitions. [2021-11-23 12:43:10,272 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 2642 transitions. Word has length 77 [2021-11-23 12:43:10,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:43:10,273 INFO L470 AbstractCegarLoop]: Abstraction has 1663 states and 2642 transitions. [2021-11-23 12:43:10,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:10,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 2642 transitions. [2021-11-23 12:43:10,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 12:43:10,277 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:43:10,277 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] [2021-11-23 12:43:10,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 12:43:10,278 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:43:10,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:43:10,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1452480302, now seen corresponding path program 1 times [2021-11-23 12:43:10,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:43:10,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567213015] [2021-11-23 12:43:10,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:43:10,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:43:10,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:43:10,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:43:10,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:43:10,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567213015] [2021-11-23 12:43:10,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567213015] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:43:10,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:43:10,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:43:10,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5877948] [2021-11-23 12:43:10,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:43:10,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:43:10,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:43:10,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:43:10,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:43:10,382 INFO L87 Difference]: Start difference. First operand 1663 states and 2642 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:10,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:43:10,447 INFO L93 Difference]: Finished difference Result 1875 states and 2978 transitions. [2021-11-23 12:43:10,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:43:10,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-23 12:43:10,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:43:10,469 INFO L225 Difference]: With dead ends: 1875 [2021-11-23 12:43:10,469 INFO L226 Difference]: Without dead ends: 1763 [2021-11-23 12:43:10,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:43:10,485 INFO L933 BasicCegarLoop]: 1604 mSDtfsCounter, 1504 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1504 SdHoareTripleChecker+Valid, 1717 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:43:10,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1504 Valid, 1717 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:43:10,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1763 states. [2021-11-23 12:43:10,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1763 to 1761. [2021-11-23 12:43:10,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1761 states, 1759 states have (on average 1.5901080159181353) internal successors, (2797), 1760 states have internal predecessors, (2797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:10,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 2797 transitions. [2021-11-23 12:43:10,615 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 2797 transitions. Word has length 77 [2021-11-23 12:43:10,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:43:10,616 INFO L470 AbstractCegarLoop]: Abstraction has 1761 states and 2797 transitions. [2021-11-23 12:43:10,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:10,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 2797 transitions. [2021-11-23 12:43:10,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 12:43:10,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:43:10,621 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] [2021-11-23 12:43:10,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 12:43:10,622 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:43:10,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:43:10,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1624501596, now seen corresponding path program 1 times [2021-11-23 12:43:10,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:43:10,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256974478] [2021-11-23 12:43:10,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:43:10,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:43:10,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:43:10,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:43:10,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:43:10,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256974478] [2021-11-23 12:43:10,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256974478] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:43:10,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:43:10,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 12:43:10,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819469777] [2021-11-23 12:43:10,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:43:10,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 12:43:10,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:43:10,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 12:43:10,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:43:10,835 INFO L87 Difference]: Start difference. First operand 1761 states and 2797 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:11,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:43:11,329 INFO L93 Difference]: Finished difference Result 4281 states and 6793 transitions. [2021-11-23 12:43:11,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 12:43:11,330 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-23 12:43:11,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:43:11,366 INFO L225 Difference]: With dead ends: 4281 [2021-11-23 12:43:11,367 INFO L226 Difference]: Without dead ends: 4071 [2021-11-23 12:43:11,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-11-23 12:43:11,371 INFO L933 BasicCegarLoop]: 1574 mSDtfsCounter, 10491 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10491 SdHoareTripleChecker+Valid, 2765 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:43:11,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10491 Valid, 2765 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:43:11,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4071 states. [2021-11-23 12:43:11,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4071 to 1969. [2021-11-23 12:43:11,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1967 states have (on average 1.5866802236909) internal successors, (3121), 1968 states have internal predecessors, (3121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:11,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 3121 transitions. [2021-11-23 12:43:11,509 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 3121 transitions. Word has length 77 [2021-11-23 12:43:11,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:43:11,511 INFO L470 AbstractCegarLoop]: Abstraction has 1969 states and 3121 transitions. [2021-11-23 12:43:11,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:11,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 3121 transitions. [2021-11-23 12:43:11,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 12:43:11,517 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:43:11,517 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] [2021-11-23 12:43:11,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 12:43:11,518 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:43:11,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:43:11,519 INFO L85 PathProgramCache]: Analyzing trace with hash 806369108, now seen corresponding path program 1 times [2021-11-23 12:43:11,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:43:11,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929990528] [2021-11-23 12:43:11,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:43:11,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:43:11,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:43:11,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:43:11,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:43:11,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929990528] [2021-11-23 12:43:11,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929990528] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:43:11,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:43:11,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:43:11,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271325606] [2021-11-23 12:43:11,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:43:11,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:43:11,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:43:11,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:43:11,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:43:11,637 INFO L87 Difference]: Start difference. First operand 1969 states and 3121 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:11,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:43:11,724 INFO L93 Difference]: Finished difference Result 2589 states and 4093 transitions. [2021-11-23 12:43:11,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:43:11,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-23 12:43:11,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:43:11,743 INFO L225 Difference]: With dead ends: 2589 [2021-11-23 12:43:11,743 INFO L226 Difference]: Without dead ends: 2171 [2021-11-23 12:43:11,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:43:11,747 INFO L933 BasicCegarLoop]: 1585 mSDtfsCounter, 1496 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1496 SdHoareTripleChecker+Valid, 1675 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:43:11,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1496 Valid, 1675 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:43:11,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2021-11-23 12:43:11,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2169. [2021-11-23 12:43:11,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2169 states, 2167 states have (on average 1.582371942778034) internal successors, (3429), 2168 states have internal predecessors, (3429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:11,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 3429 transitions. [2021-11-23 12:43:11,854 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 3429 transitions. Word has length 79 [2021-11-23 12:43:11,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:43:11,855 INFO L470 AbstractCegarLoop]: Abstraction has 2169 states and 3429 transitions. [2021-11-23 12:43:11,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:11,856 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 3429 transitions. [2021-11-23 12:43:11,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 12:43:11,857 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:43:11,858 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] [2021-11-23 12:43:11,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 12:43:11,858 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:43:11,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:43:11,859 INFO L85 PathProgramCache]: Analyzing trace with hash 872862620, now seen corresponding path program 1 times [2021-11-23 12:43:11,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:43:11,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685784066] [2021-11-23 12:43:11,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:43:11,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:43:11,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:43:12,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:43:12,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:43:12,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685784066] [2021-11-23 12:43:12,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685784066] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:43:12,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:43:12,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 12:43:12,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963001232] [2021-11-23 12:43:12,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:43:12,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 12:43:12,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:43:12,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 12:43:12,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:43:12,191 INFO L87 Difference]: Start difference. First operand 2169 states and 3429 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:12,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:43:12,606 INFO L93 Difference]: Finished difference Result 2787 states and 4393 transitions. [2021-11-23 12:43:12,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 12:43:12,607 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-23 12:43:12,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:43:12,624 INFO L225 Difference]: With dead ends: 2787 [2021-11-23 12:43:12,624 INFO L226 Difference]: Without dead ends: 2171 [2021-11-23 12:43:12,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-11-23 12:43:12,628 INFO L933 BasicCegarLoop]: 1597 mSDtfsCounter, 7775 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7775 SdHoareTripleChecker+Valid, 2058 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:43:12,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7775 Valid, 2058 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:43:12,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2021-11-23 12:43:12,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2169. [2021-11-23 12:43:12,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2169 states, 2167 states have (on average 1.5796031379787725) internal successors, (3423), 2168 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:12,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 3423 transitions. [2021-11-23 12:43:12,742 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 3423 transitions. Word has length 79 [2021-11-23 12:43:12,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:43:12,743 INFO L470 AbstractCegarLoop]: Abstraction has 2169 states and 3423 transitions. [2021-11-23 12:43:12,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:12,744 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 3423 transitions. [2021-11-23 12:43:12,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 12:43:12,752 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:43:12,752 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] [2021-11-23 12:43:12,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 12:43:12,753 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:43:12,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:43:12,754 INFO L85 PathProgramCache]: Analyzing trace with hash -385682984, now seen corresponding path program 1 times [2021-11-23 12:43:12,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:43:12,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880712511] [2021-11-23 12:43:12,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:43:12,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:43:12,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:43:12,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:43:12,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:43:12,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880712511] [2021-11-23 12:43:12,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880712511] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:43:12,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:43:12,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:43:12,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307577658] [2021-11-23 12:43:12,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:43:12,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:43:12,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:43:12,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:43:12,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:43:12,855 INFO L87 Difference]: Start difference. First operand 2169 states and 3423 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:12,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:43:12,982 INFO L93 Difference]: Finished difference Result 3329 states and 5217 transitions. [2021-11-23 12:43:12,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:43:12,983 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-23 12:43:12,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:43:13,004 INFO L225 Difference]: With dead ends: 3329 [2021-11-23 12:43:13,004 INFO L226 Difference]: Without dead ends: 2713 [2021-11-23 12:43:13,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:43:13,007 INFO L933 BasicCegarLoop]: 1617 mSDtfsCounter, 1508 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1508 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:43:13,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1508 Valid, 1726 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:43:13,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2021-11-23 12:43:13,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2711. [2021-11-23 12:43:13,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2711 states, 2709 states have (on average 1.567737172388335) internal successors, (4247), 2710 states have internal predecessors, (4247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:13,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2711 states to 2711 states and 4247 transitions. [2021-11-23 12:43:13,208 INFO L78 Accepts]: Start accepts. Automaton has 2711 states and 4247 transitions. Word has length 79 [2021-11-23 12:43:13,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:43:13,208 INFO L470 AbstractCegarLoop]: Abstraction has 2711 states and 4247 transitions. [2021-11-23 12:43:13,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:13,209 INFO L276 IsEmpty]: Start isEmpty. Operand 2711 states and 4247 transitions. [2021-11-23 12:43:13,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 12:43:13,210 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:43:13,211 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] [2021-11-23 12:43:13,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 12:43:13,213 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:43:13,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:43:13,214 INFO L85 PathProgramCache]: Analyzing trace with hash -111995272, now seen corresponding path program 1 times [2021-11-23 12:43:13,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:43:13,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640322334] [2021-11-23 12:43:13,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:43:13,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:43:13,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:43:13,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:43:13,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:43:13,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640322334] [2021-11-23 12:43:13,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640322334] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:43:13,293 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:43:13,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:43:13,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955119911] [2021-11-23 12:43:13,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:43:13,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:43:13,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:43:13,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:43:13,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:43:13,296 INFO L87 Difference]: Start difference. First operand 2711 states and 4247 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:13,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:43:13,480 INFO L93 Difference]: Finished difference Result 4883 states and 7569 transitions. [2021-11-23 12:43:13,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:43:13,481 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-23 12:43:13,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:43:13,508 INFO L225 Difference]: With dead ends: 4883 [2021-11-23 12:43:13,508 INFO L226 Difference]: Without dead ends: 3725 [2021-11-23 12:43:13,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:43:13,515 INFO L933 BasicCegarLoop]: 1630 mSDtfsCounter, 1512 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1512 SdHoareTripleChecker+Valid, 1735 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:43:13,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1512 Valid, 1735 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:43:13,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3725 states. [2021-11-23 12:43:13,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3725 to 3723. [2021-11-23 12:43:13,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3723 states, 3721 states have (on average 1.5487772104273045) internal successors, (5763), 3722 states have internal predecessors, (5763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:13,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3723 states to 3723 states and 5763 transitions. [2021-11-23 12:43:13,763 INFO L78 Accepts]: Start accepts. Automaton has 3723 states and 5763 transitions. Word has length 79 [2021-11-23 12:43:13,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:43:13,763 INFO L470 AbstractCegarLoop]: Abstraction has 3723 states and 5763 transitions. [2021-11-23 12:43:13,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:13,764 INFO L276 IsEmpty]: Start isEmpty. Operand 3723 states and 5763 transitions. [2021-11-23 12:43:13,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 12:43:13,765 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:43:13,766 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] [2021-11-23 12:43:13,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 12:43:13,766 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:43:13,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:43:13,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1707076376, now seen corresponding path program 1 times [2021-11-23 12:43:13,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:43:13,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908795113] [2021-11-23 12:43:13,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:43:13,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:43:13,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:43:13,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:43:13,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:43:13,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908795113] [2021-11-23 12:43:13,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908795113] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:43:13,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:43:13,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:43:13,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823024078] [2021-11-23 12:43:13,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:43:13,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:43:13,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:43:13,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:43:13,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:43:13,859 INFO L87 Difference]: Start difference. First operand 3723 states and 5763 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:14,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:43:14,173 INFO L93 Difference]: Finished difference Result 7775 states and 11877 transitions. [2021-11-23 12:43:14,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:43:14,174 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-23 12:43:14,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:43:14,227 INFO L225 Difference]: With dead ends: 7775 [2021-11-23 12:43:14,227 INFO L226 Difference]: Without dead ends: 5605 [2021-11-23 12:43:14,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:43:14,233 INFO L933 BasicCegarLoop]: 1643 mSDtfsCounter, 1516 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1516 SdHoareTripleChecker+Valid, 1744 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:43:14,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1516 Valid, 1744 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:43:14,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5605 states. [2021-11-23 12:43:14,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5605 to 5603. [2021-11-23 12:43:14,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5603 states, 5601 states have (on average 1.523120871272987) internal successors, (8531), 5602 states have internal predecessors, (8531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:14,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5603 states to 5603 states and 8531 transitions. [2021-11-23 12:43:14,654 INFO L78 Accepts]: Start accepts. Automaton has 5603 states and 8531 transitions. Word has length 79 [2021-11-23 12:43:14,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:43:14,654 INFO L470 AbstractCegarLoop]: Abstraction has 5603 states and 8531 transitions. [2021-11-23 12:43:14,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:14,656 INFO L276 IsEmpty]: Start isEmpty. Operand 5603 states and 8531 transitions. [2021-11-23 12:43:14,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 12:43:14,657 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:43:14,657 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] [2021-11-23 12:43:14,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 12:43:14,658 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:43:14,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:43:14,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1886482360, now seen corresponding path program 1 times [2021-11-23 12:43:14,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:43:14,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008480402] [2021-11-23 12:43:14,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:43:14,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:43:14,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:43:14,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:43:14,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:43:14,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008480402] [2021-11-23 12:43:14,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008480402] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:43:14,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:43:14,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:43:14,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277466066] [2021-11-23 12:43:14,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:43:14,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:43:14,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:43:14,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:43:14,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:43:14,823 INFO L87 Difference]: Start difference. First operand 5603 states and 8531 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:15,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:43:15,507 INFO L93 Difference]: Finished difference Result 13127 states and 19701 transitions. [2021-11-23 12:43:15,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:43:15,507 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-23 12:43:15,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:43:15,536 INFO L225 Difference]: With dead ends: 13127 [2021-11-23 12:43:15,537 INFO L226 Difference]: Without dead ends: 9077 [2021-11-23 12:43:15,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:43:15,548 INFO L933 BasicCegarLoop]: 1656 mSDtfsCounter, 1520 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1520 SdHoareTripleChecker+Valid, 1753 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:43:15,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1520 Valid, 1753 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:43:15,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9077 states. [2021-11-23 12:43:16,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9077 to 9075. [2021-11-23 12:43:16,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9075 states, 9073 states have (on average 1.4922296924942136) internal successors, (13539), 9074 states have internal predecessors, (13539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:16,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9075 states to 9075 states and 13539 transitions. [2021-11-23 12:43:16,361 INFO L78 Accepts]: Start accepts. Automaton has 9075 states and 13539 transitions. Word has length 79 [2021-11-23 12:43:16,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:43:16,361 INFO L470 AbstractCegarLoop]: Abstraction has 9075 states and 13539 transitions. [2021-11-23 12:43:16,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:16,362 INFO L276 IsEmpty]: Start isEmpty. Operand 9075 states and 13539 transitions. [2021-11-23 12:43:16,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-23 12:43:16,363 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:43:16,363 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] [2021-11-23 12:43:16,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 12:43:16,364 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:43:16,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:43:16,365 INFO L85 PathProgramCache]: Analyzing trace with hash 874214487, now seen corresponding path program 1 times [2021-11-23 12:43:16,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:43:16,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845301111] [2021-11-23 12:43:16,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:43:16,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:43:16,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:43:16,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:43:16,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:43:16,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845301111] [2021-11-23 12:43:16,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845301111] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:43:16,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:43:16,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 12:43:16,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180873397] [2021-11-23 12:43:16,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:43:16,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:43:16,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:43:16,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:43:16,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:43:16,487 INFO L87 Difference]: Start difference. First operand 9075 states and 13539 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:17,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:43:17,578 INFO L93 Difference]: Finished difference Result 15538 states and 22810 transitions. [2021-11-23 12:43:17,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 12:43:17,579 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-23 12:43:17,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:43:17,620 INFO L225 Difference]: With dead ends: 15538 [2021-11-23 12:43:17,620 INFO L226 Difference]: Without dead ends: 15536 [2021-11-23 12:43:17,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:43:17,626 INFO L933 BasicCegarLoop]: 1612 mSDtfsCounter, 256 mSDsluCounter, 4733 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 6345 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:43:17,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 6345 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:43:17,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15536 states. [2021-11-23 12:43:18,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15536 to 9459. [2021-11-23 12:43:18,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9459 states, 9457 states have (on average 1.4688590462091573) internal successors, (13891), 9458 states have internal predecessors, (13891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:18,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9459 states to 9459 states and 13891 transitions. [2021-11-23 12:43:18,421 INFO L78 Accepts]: Start accepts. Automaton has 9459 states and 13891 transitions. Word has length 80 [2021-11-23 12:43:18,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:43:18,422 INFO L470 AbstractCegarLoop]: Abstraction has 9459 states and 13891 transitions. [2021-11-23 12:43:18,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:18,423 INFO L276 IsEmpty]: Start isEmpty. Operand 9459 states and 13891 transitions. [2021-11-23 12:43:18,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-23 12:43:18,427 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:43:18,427 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:43:18,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 12:43:18,428 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:43:18,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:43:18,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1548163809, now seen corresponding path program 1 times [2021-11-23 12:43:18,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:43:18,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934796335] [2021-11-23 12:43:18,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:43:18,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:43:18,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:43:18,501 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:43:18,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:43:18,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934796335] [2021-11-23 12:43:18,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934796335] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:43:18,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:43:18,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 12:43:18,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044042201] [2021-11-23 12:43:18,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:43:18,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:43:18,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:43:18,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:43:18,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:43:18,505 INFO L87 Difference]: Start difference. First operand 9459 states and 13891 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:23,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:43:23,880 INFO L93 Difference]: Finished difference Result 12467 states and 18723 transitions. [2021-11-23 12:43:23,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:43:23,880 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-11-23 12:43:23,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:43:23,907 INFO L225 Difference]: With dead ends: 12467 [2021-11-23 12:43:23,907 INFO L226 Difference]: Without dead ends: 10963 [2021-11-23 12:43:23,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:43:23,915 INFO L933 BasicCegarLoop]: 717 mSDtfsCounter, 1056 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2380 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1056 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 2930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 2380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-23 12:43:23,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1056 Valid, 724 Invalid, 2930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 2380 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-11-23 12:43:23,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10963 states. [2021-11-23 12:43:24,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10963 to 10961. [2021-11-23 12:43:24,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10961 states, 10959 states have (on average 1.447394835295191) internal successors, (15862), 10960 states have internal predecessors, (15862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:24,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10961 states to 10961 states and 15862 transitions. [2021-11-23 12:43:24,785 INFO L78 Accepts]: Start accepts. Automaton has 10961 states and 15862 transitions. Word has length 105 [2021-11-23 12:43:24,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:43:24,786 INFO L470 AbstractCegarLoop]: Abstraction has 10961 states and 15862 transitions. [2021-11-23 12:43:24,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:24,787 INFO L276 IsEmpty]: Start isEmpty. Operand 10961 states and 15862 transitions. [2021-11-23 12:43:24,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 12:43:24,794 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:43:24,795 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:43:24,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 12:43:24,795 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:43:24,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:43:24,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1411161737, now seen corresponding path program 1 times [2021-11-23 12:43:24,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:43:24,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033440761] [2021-11-23 12:43:24,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:43:24,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:43:24,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:43:24,953 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 12:43:24,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:43:24,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033440761] [2021-11-23 12:43:24,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033440761] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:43:24,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:43:24,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 12:43:24,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257284815] [2021-11-23 12:43:24,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:43:24,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 12:43:24,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:43:24,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 12:43:24,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:43:24,957 INFO L87 Difference]: Start difference. First operand 10961 states and 15862 transitions. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:28,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:43:28,073 INFO L93 Difference]: Finished difference Result 59967 states and 86573 transitions. [2021-11-23 12:43:28,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 12:43:28,076 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-23 12:43:28,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:43:28,219 INFO L225 Difference]: With dead ends: 59967 [2021-11-23 12:43:28,219 INFO L226 Difference]: Without dead ends: 52061 [2021-11-23 12:43:28,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-23 12:43:28,246 INFO L933 BasicCegarLoop]: 1665 mSDtfsCounter, 8617 mSDsluCounter, 2136 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8617 SdHoareTripleChecker+Valid, 3801 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:43:28,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8617 Valid, 3801 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:43:28,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52061 states. [2021-11-23 12:43:29,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52061 to 18865. [2021-11-23 12:43:29,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18865 states, 18863 states have (on average 1.4414462174627578) internal successors, (27190), 18864 states have internal predecessors, (27190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:29,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18865 states to 18865 states and 27190 transitions. [2021-11-23 12:43:29,743 INFO L78 Accepts]: Start accepts. Automaton has 18865 states and 27190 transitions. Word has length 112 [2021-11-23 12:43:29,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:43:29,744 INFO L470 AbstractCegarLoop]: Abstraction has 18865 states and 27190 transitions. [2021-11-23 12:43:29,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:29,744 INFO L276 IsEmpty]: Start isEmpty. Operand 18865 states and 27190 transitions. [2021-11-23 12:43:29,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 12:43:29,754 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:43:29,755 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:43:29,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 12:43:29,755 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:43:29,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:43:29,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1381639519, now seen corresponding path program 1 times [2021-11-23 12:43:29,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:43:29,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392599840] [2021-11-23 12:43:29,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:43:29,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:43:29,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:43:29,879 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 12:43:29,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:43:29,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392599840] [2021-11-23 12:43:29,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392599840] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:43:29,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:43:29,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 12:43:29,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855810357] [2021-11-23 12:43:29,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:43:29,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 12:43:29,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:43:29,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 12:43:29,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:43:29,883 INFO L87 Difference]: Start difference. First operand 18865 states and 27190 transitions. Second operand has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:33,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:43:33,448 INFO L93 Difference]: Finished difference Result 67871 states and 97901 transitions. [2021-11-23 12:43:33,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 12:43:33,448 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-23 12:43:33,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:43:33,574 INFO L225 Difference]: With dead ends: 67871 [2021-11-23 12:43:33,574 INFO L226 Difference]: Without dead ends: 59965 [2021-11-23 12:43:33,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-23 12:43:33,595 INFO L933 BasicCegarLoop]: 1665 mSDtfsCounter, 8442 mSDsluCounter, 2197 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8442 SdHoareTripleChecker+Valid, 3862 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:43:33,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8442 Valid, 3862 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:43:33,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59965 states. [2021-11-23 12:43:35,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59965 to 30737. [2021-11-23 12:43:35,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30737 states, 30735 states have (on average 1.4349113388644867) internal successors, (44102), 30736 states have internal predecessors, (44102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:35,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30737 states to 30737 states and 44102 transitions. [2021-11-23 12:43:35,534 INFO L78 Accepts]: Start accepts. Automaton has 30737 states and 44102 transitions. Word has length 112 [2021-11-23 12:43:35,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:43:35,535 INFO L470 AbstractCegarLoop]: Abstraction has 30737 states and 44102 transitions. [2021-11-23 12:43:35,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:35,535 INFO L276 IsEmpty]: Start isEmpty. Operand 30737 states and 44102 transitions. [2021-11-23 12:43:35,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 12:43:35,547 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:43:35,548 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:43:35,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 12:43:35,548 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:43:35,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:43:35,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1107951807, now seen corresponding path program 1 times [2021-11-23 12:43:35,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:43:35,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248520527] [2021-11-23 12:43:35,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:43:35,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:43:35,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:43:35,685 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 12:43:35,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:43:35,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248520527] [2021-11-23 12:43:35,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248520527] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:43:35,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:43:35,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 12:43:35,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108156808] [2021-11-23 12:43:35,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:43:35,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 12:43:35,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:43:35,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 12:43:35,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:43:35,692 INFO L87 Difference]: Start difference. First operand 30737 states and 44102 transitions. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:39,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:43:39,689 INFO L93 Difference]: Finished difference Result 75775 states and 109229 transitions. [2021-11-23 12:43:39,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 12:43:39,690 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-23 12:43:39,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:43:39,815 INFO L225 Difference]: With dead ends: 75775 [2021-11-23 12:43:39,816 INFO L226 Difference]: Without dead ends: 67869 [2021-11-23 12:43:39,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-23 12:43:39,843 INFO L933 BasicCegarLoop]: 1665 mSDtfsCounter, 8410 mSDsluCounter, 2237 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8410 SdHoareTripleChecker+Valid, 3902 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:43:39,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8410 Valid, 3902 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:43:39,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67869 states. [2021-11-23 12:43:42,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67869 to 38641. [2021-11-23 12:43:42,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38641 states, 38639 states have (on average 1.4345609358420248) internal successors, (55430), 38640 states have internal predecessors, (55430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:42,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38641 states to 38641 states and 55430 transitions. [2021-11-23 12:43:42,881 INFO L78 Accepts]: Start accepts. Automaton has 38641 states and 55430 transitions. Word has length 112 [2021-11-23 12:43:42,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:43:42,881 INFO L470 AbstractCegarLoop]: Abstraction has 38641 states and 55430 transitions. [2021-11-23 12:43:42,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:42,882 INFO L276 IsEmpty]: Start isEmpty. Operand 38641 states and 55430 transitions. [2021-11-23 12:43:42,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 12:43:42,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:43:42,897 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:43:42,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 12:43:42,897 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:43:42,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:43:42,898 INFO L85 PathProgramCache]: Analyzing trace with hash 711119841, now seen corresponding path program 1 times [2021-11-23 12:43:42,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:43:42,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615101060] [2021-11-23 12:43:42,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:43:42,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:43:42,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:43:43,022 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 12:43:43,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:43:43,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615101060] [2021-11-23 12:43:43,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615101060] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:43:43,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:43:43,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 12:43:43,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256793209] [2021-11-23 12:43:43,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:43:43,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 12:43:43,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:43:43,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 12:43:43,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:43:43,026 INFO L87 Difference]: Start difference. First operand 38641 states and 55430 transitions. Second operand has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:48,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:43:48,239 INFO L93 Difference]: Finished difference Result 83679 states and 120557 transitions. [2021-11-23 12:43:48,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 12:43:48,240 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-23 12:43:48,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:43:48,354 INFO L225 Difference]: With dead ends: 83679 [2021-11-23 12:43:48,354 INFO L226 Difference]: Without dead ends: 75773 [2021-11-23 12:43:48,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-23 12:43:48,377 INFO L933 BasicCegarLoop]: 1665 mSDtfsCounter, 8476 mSDsluCounter, 2272 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8476 SdHoareTripleChecker+Valid, 3937 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:43:48,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8476 Valid, 3937 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:43:48,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75773 states. [2021-11-23 12:43:51,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75773 to 46545. [2021-11-23 12:43:51,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46545 states, 46543 states have (on average 1.434329544722085) internal successors, (66758), 46544 states have internal predecessors, (66758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:51,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46545 states to 46545 states and 66758 transitions. [2021-11-23 12:43:51,730 INFO L78 Accepts]: Start accepts. Automaton has 46545 states and 66758 transitions. Word has length 112 [2021-11-23 12:43:51,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:43:51,730 INFO L470 AbstractCegarLoop]: Abstraction has 46545 states and 66758 transitions. [2021-11-23 12:43:51,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:51,730 INFO L276 IsEmpty]: Start isEmpty. Operand 46545 states and 66758 transitions. [2021-11-23 12:43:51,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 12:43:51,747 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:43:51,748 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:43:51,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 12:43:51,748 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:43:51,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:43:51,749 INFO L85 PathProgramCache]: Analyzing trace with hash 890525825, now seen corresponding path program 1 times [2021-11-23 12:43:51,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:43:51,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789692575] [2021-11-23 12:43:51,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:43:51,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:43:51,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:43:51,870 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:43:51,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:43:51,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789692575] [2021-11-23 12:43:51,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789692575] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:43:51,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:43:51,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 12:43:51,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801409837] [2021-11-23 12:43:51,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:43:51,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 12:43:51,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:43:51,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 12:43:51,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:43:51,873 INFO L87 Difference]: Start difference. First operand 46545 states and 66758 transitions. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:57,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:43:57,936 INFO L93 Difference]: Finished difference Result 91583 states and 131885 transitions. [2021-11-23 12:43:57,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 12:43:57,936 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-23 12:43:57,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:43:58,037 INFO L225 Difference]: With dead ends: 91583 [2021-11-23 12:43:58,037 INFO L226 Difference]: Without dead ends: 83677 [2021-11-23 12:43:58,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-23 12:43:58,058 INFO L933 BasicCegarLoop]: 1666 mSDtfsCounter, 8580 mSDsluCounter, 2264 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8580 SdHoareTripleChecker+Valid, 3930 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:43:58,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8580 Valid, 3930 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:43:58,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83677 states. [2021-11-23 12:44:02,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83677 to 54449. [2021-11-23 12:44:02,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54449 states, 54447 states have (on average 1.4341653350965158) internal successors, (78086), 54448 states have internal predecessors, (78086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:44:02,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54449 states to 54449 states and 78086 transitions. [2021-11-23 12:44:02,824 INFO L78 Accepts]: Start accepts. Automaton has 54449 states and 78086 transitions. Word has length 112 [2021-11-23 12:44:02,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:44:02,824 INFO L470 AbstractCegarLoop]: Abstraction has 54449 states and 78086 transitions. [2021-11-23 12:44:02,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:44:02,825 INFO L276 IsEmpty]: Start isEmpty. Operand 54449 states and 78086 transitions. [2021-11-23 12:44:02,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 12:44:02,839 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:44:02,839 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:44:02,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-23 12:44:02,840 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:44:02,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:44:02,841 INFO L85 PathProgramCache]: Analyzing trace with hash -420877289, now seen corresponding path program 1 times [2021-11-23 12:44:02,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:44:02,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233959080] [2021-11-23 12:44:02,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:44:02,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:44:02,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:44:02,952 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 12:44:02,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:44:02,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233959080] [2021-11-23 12:44:02,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233959080] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:44:02,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:44:02,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 12:44:02,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127570863] [2021-11-23 12:44:02,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:44:02,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 12:44:02,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:44:02,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 12:44:02,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:44:02,957 INFO L87 Difference]: Start difference. First operand 54449 states and 78086 transitions. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:44:10,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:44:10,272 INFO L93 Difference]: Finished difference Result 94687 states and 136365 transitions. [2021-11-23 12:44:10,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 12:44:10,272 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-23 12:44:10,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:44:10,382 INFO L225 Difference]: With dead ends: 94687 [2021-11-23 12:44:10,382 INFO L226 Difference]: Without dead ends: 89181 [2021-11-23 12:44:10,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-23 12:44:10,400 INFO L933 BasicCegarLoop]: 1663 mSDtfsCounter, 8579 mSDsluCounter, 2170 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8579 SdHoareTripleChecker+Valid, 3833 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:44:10,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8579 Valid, 3833 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 12:44:10,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89181 states. [2021-11-23 12:44:15,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89181 to 59953. [2021-11-23 12:44:15,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59953 states, 59951 states have (on average 1.4348718119797834) internal successors, (86022), 59952 states have internal predecessors, (86022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:44:15,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59953 states to 59953 states and 86022 transitions. [2021-11-23 12:44:15,836 INFO L78 Accepts]: Start accepts. Automaton has 59953 states and 86022 transitions. Word has length 112 [2021-11-23 12:44:15,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:44:15,837 INFO L470 AbstractCegarLoop]: Abstraction has 59953 states and 86022 transitions. [2021-11-23 12:44:15,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:44:15,837 INFO L276 IsEmpty]: Start isEmpty. Operand 59953 states and 86022 transitions. [2021-11-23 12:44:15,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-23 12:44:15,852 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:44:15,853 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:44:15,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-23 12:44:15,853 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:44:15,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:44:15,854 INFO L85 PathProgramCache]: Analyzing trace with hash 746098925, now seen corresponding path program 1 times [2021-11-23 12:44:15,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:44:15,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090505454] [2021-11-23 12:44:15,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:44:15,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:44:15,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:44:15,917 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:44:15,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:44:15,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090505454] [2021-11-23 12:44:15,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090505454] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:44:15,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:44:15,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:44:15,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043030059] [2021-11-23 12:44:15,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:44:15,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:44:15,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:44:15,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:44:15,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:44:15,921 INFO L87 Difference]: Start difference. First operand 59953 states and 86022 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)