./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label37.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5256604f-9eed-421c-a22d-20b3c3083919/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5256604f-9eed-421c-a22d-20b3c3083919/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5256604f-9eed-421c-a22d-20b3c3083919/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5256604f-9eed-421c-a22d-20b3c3083919/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label37.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5256604f-9eed-421c-a22d-20b3c3083919/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5256604f-9eed-421c-a22d-20b3c3083919/bin/uautomizer-IVEQpCNsaX --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 a60dbc2f79c578f373d1608befa1a0be5fe97eed98271e53ccf8c768ad5b972e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 10:51:01,492 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 10:51:01,496 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 10:51:01,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 10:51:01,578 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 10:51:01,581 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 10:51:01,583 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 10:51:01,588 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 10:51:01,591 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 10:51:01,598 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 10:51:01,600 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 10:51:01,602 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 10:51:01,603 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 10:51:01,606 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 10:51:01,609 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 10:51:01,616 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 10:51:01,619 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 10:51:01,621 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 10:51:01,624 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 10:51:01,634 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 10:51:01,637 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 10:51:01,638 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 10:51:01,642 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 10:51:01,644 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 10:51:01,651 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 10:51:01,652 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 10:51:01,652 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 10:51:01,654 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 10:51:01,655 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 10:51:01,656 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 10:51:01,657 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 10:51:01,659 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 10:51:01,660 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 10:51:01,661 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 10:51:01,663 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 10:51:01,663 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 10:51:01,664 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 10:51:01,665 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 10:51:01,665 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 10:51:01,667 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 10:51:01,668 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 10:51:01,669 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5256604f-9eed-421c-a22d-20b3c3083919/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 10:51:01,712 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 10:51:01,715 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 10:51:01,716 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 10:51:01,716 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 10:51:01,726 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 10:51:01,727 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 10:51:01,727 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 10:51:01,728 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 10:51:01,728 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 10:51:01,729 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 10:51:01,730 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 10:51:01,730 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 10:51:01,731 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 10:51:01,731 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 10:51:01,731 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 10:51:01,732 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 10:51:01,732 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 10:51:01,732 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 10:51:01,732 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 10:51:01,733 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 10:51:01,733 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 10:51:01,733 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 10:51:01,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:51:01,734 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 10:51:01,734 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 10:51:01,735 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 10:51:01,735 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 10:51:01,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 10:51:01,736 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 10:51:01,738 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 10:51:01,738 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 10:51:01,738 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 10:51:01,739 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_5256604f-9eed-421c-a22d-20b3c3083919/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5256604f-9eed-421c-a22d-20b3c3083919/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a60dbc2f79c578f373d1608befa1a0be5fe97eed98271e53ccf8c768ad5b972e [2021-11-09 10:51:02,161 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 10:51:02,190 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 10:51:02,194 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 10:51:02,196 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 10:51:02,197 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 10:51:02,198 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5256604f-9eed-421c-a22d-20b3c3083919/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/eca-rers2012/Problem13_label37.c [2021-11-09 10:51:02,279 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5256604f-9eed-421c-a22d-20b3c3083919/bin/uautomizer-IVEQpCNsaX/data/6fba042f3/540a14137e52403d946b58bd91dc08ec/FLAG10fc0b385 [2021-11-09 10:51:03,424 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 10:51:03,426 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5256604f-9eed-421c-a22d-20b3c3083919/sv-benchmarks/c/eca-rers2012/Problem13_label37.c [2021-11-09 10:51:03,487 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5256604f-9eed-421c-a22d-20b3c3083919/bin/uautomizer-IVEQpCNsaX/data/6fba042f3/540a14137e52403d946b58bd91dc08ec/FLAG10fc0b385 [2021-11-09 10:51:03,767 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5256604f-9eed-421c-a22d-20b3c3083919/bin/uautomizer-IVEQpCNsaX/data/6fba042f3/540a14137e52403d946b58bd91dc08ec [2021-11-09 10:51:03,771 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 10:51:03,773 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 10:51:03,776 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 10:51:03,776 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 10:51:03,794 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 10:51:03,796 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:51:03" (1/1) ... [2021-11-09 10:51:03,798 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b8b93f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:51:03, skipping insertion in model container [2021-11-09 10:51:03,798 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:51:03" (1/1) ... [2021-11-09 10:51:03,808 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 10:51:04,045 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 10:51:04,569 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5256604f-9eed-421c-a22d-20b3c3083919/sv-benchmarks/c/eca-rers2012/Problem13_label37.c[7700,7713] [2021-11-09 10:51:06,053 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:51:06,069 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 10:51:06,128 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5256604f-9eed-421c-a22d-20b3c3083919/sv-benchmarks/c/eca-rers2012/Problem13_label37.c[7700,7713] [2021-11-09 10:51:07,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:51:07,241 INFO L208 MainTranslator]: Completed translation [2021-11-09 10:51:07,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:51:07 WrapperNode [2021-11-09 10:51:07,243 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 10:51:07,244 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 10:51:07,245 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 10:51:07,245 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 10:51:07,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:51:07" (1/1) ... [2021-11-09 10:51:07,359 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:51:07" (1/1) ... [2021-11-09 10:51:08,284 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 10:51:08,287 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 10:51:08,288 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 10:51:08,288 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 10:51:08,300 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:51:07" (1/1) ... [2021-11-09 10:51:08,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:51:07" (1/1) ... [2021-11-09 10:51:08,532 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:51:07" (1/1) ... [2021-11-09 10:51:08,565 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:51:07" (1/1) ... [2021-11-09 10:51:09,000 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:51:07" (1/1) ... [2021-11-09 10:51:09,046 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:51:07" (1/1) ... [2021-11-09 10:51:09,159 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:51:07" (1/1) ... [2021-11-09 10:51:09,324 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 10:51:09,325 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 10:51:09,325 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 10:51:09,326 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 10:51:09,328 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:51:07" (1/1) ... [2021-11-09 10:51:09,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:51:09,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5256604f-9eed-421c-a22d-20b3c3083919/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:51:09,373 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5256604f-9eed-421c-a22d-20b3c3083919/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 10:51:09,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5256604f-9eed-421c-a22d-20b3c3083919/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 10:51:09,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 10:51:09,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 10:51:09,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 10:51:09,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 10:51:17,257 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 10:51:17,258 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-11-09 10:51:17,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:51:17 BoogieIcfgContainer [2021-11-09 10:51:17,264 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 10:51:17,266 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 10:51:17,266 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 10:51:17,271 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 10:51:17,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:51:03" (1/3) ... [2021-11-09 10:51:17,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25d8618f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:51:17, skipping insertion in model container [2021-11-09 10:51:17,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:51:07" (2/3) ... [2021-11-09 10:51:17,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25d8618f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:51:17, skipping insertion in model container [2021-11-09 10:51:17,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:51:17" (3/3) ... [2021-11-09 10:51:17,275 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label37.c [2021-11-09 10:51:17,282 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 10:51:17,283 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 10:51:17,358 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 10:51:17,367 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 [2021-11-09 10:51:17,367 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 10:51:17,420 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:17,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-09 10:51:17,430 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:51:17,431 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:51:17,432 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:51:17,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:17,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1425694346, now seen corresponding path program 1 times [2021-11-09 10:51:17,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:51:17,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270253790] [2021-11-09 10:51:17,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:17,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:51:17,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:17,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:51:17,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:51:17,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270253790] [2021-11-09 10:51:17,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270253790] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:51:17,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:51:17,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 10:51:17,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660822981] [2021-11-09 10:51:17,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:51:17,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:51:17,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:51:17,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:51:17,900 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 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 18.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:25,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:51:25,551 INFO L93 Difference]: Finished difference Result 3121 states and 5804 transitions. [2021-11-09 10:51:25,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:51:25,554 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-11-09 10:51:25,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:51:25,605 INFO L225 Difference]: With dead ends: 3121 [2021-11-09 10:51:25,605 INFO L226 Difference]: Without dead ends: 1944 [2021-11-09 10:51:25,619 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:51:25,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-11-09 10:51:25,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1873. [2021-11-09 10:51:25,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1872 states have (on average 1.7393162393162394) internal successors, (3256), 1872 states have internal predecessors, (3256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:25,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 3256 transitions. [2021-11-09 10:51:25,934 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 3256 transitions. Word has length 54 [2021-11-09 10:51:25,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:51:25,935 INFO L470 AbstractCegarLoop]: Abstraction has 1873 states and 3256 transitions. [2021-11-09 10:51:25,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:25,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 3256 transitions. [2021-11-09 10:51:25,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-09 10:51:25,942 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:51:25,943 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:51:25,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 10:51:25,944 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:51:25,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:25,945 INFO L85 PathProgramCache]: Analyzing trace with hash 916312146, now seen corresponding path program 1 times [2021-11-09 10:51:25,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:51:25,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399593659] [2021-11-09 10:51:25,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:25,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:51:26,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:26,175 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:51:26,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:51:26,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399593659] [2021-11-09 10:51:26,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399593659] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:51:26,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:51:26,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 10:51:26,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169333873] [2021-11-09 10:51:26,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:51:26,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:51:26,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:51:26,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:51:26,186 INFO L87 Difference]: Start difference. First operand 1873 states and 3256 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:32,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:51:32,585 INFO L93 Difference]: Finished difference Result 5351 states and 9369 transitions. [2021-11-09 10:51:32,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:51:32,586 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 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 119 [2021-11-09 10:51:32,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:51:32,615 INFO L225 Difference]: With dead ends: 5351 [2021-11-09 10:51:32,615 INFO L226 Difference]: Without dead ends: 3480 [2021-11-09 10:51:32,619 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:51:32,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3480 states. [2021-11-09 10:51:32,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3480 to 3479. [2021-11-09 10:51:32,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3479 states, 3478 states have (on average 1.518688901667625) internal successors, (5282), 3478 states have internal predecessors, (5282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:32,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3479 states to 3479 states and 5282 transitions. [2021-11-09 10:51:32,738 INFO L78 Accepts]: Start accepts. Automaton has 3479 states and 5282 transitions. Word has length 119 [2021-11-09 10:51:32,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:51:32,741 INFO L470 AbstractCegarLoop]: Abstraction has 3479 states and 5282 transitions. [2021-11-09 10:51:32,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:32,742 INFO L276 IsEmpty]: Start isEmpty. Operand 3479 states and 5282 transitions. [2021-11-09 10:51:32,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-09 10:51:32,755 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:51:32,756 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:51:32,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 10:51:32,758 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:51:32,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:32,760 INFO L85 PathProgramCache]: Analyzing trace with hash -717638515, now seen corresponding path program 1 times [2021-11-09 10:51:32,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:51:32,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880142975] [2021-11-09 10:51:32,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:32,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:51:32,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:32,944 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:51:32,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:51:32,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880142975] [2021-11-09 10:51:32,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880142975] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:51:32,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:51:32,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 10:51:32,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967484572] [2021-11-09 10:51:32,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:51:32,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:51:32,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:51:32,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:51:32,961 INFO L87 Difference]: Start difference. First operand 3479 states and 5282 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:38,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:51:38,352 INFO L93 Difference]: Finished difference Result 10142 states and 15438 transitions. [2021-11-09 10:51:38,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:51:38,354 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 0 states have call successors, (0), 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 121 [2021-11-09 10:51:38,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:51:38,405 INFO L225 Difference]: With dead ends: 10142 [2021-11-09 10:51:38,405 INFO L226 Difference]: Without dead ends: 6665 [2021-11-09 10:51:38,411 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:51:38,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6665 states. [2021-11-09 10:51:38,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6665 to 6657. [2021-11-09 10:51:38,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6657 states, 6656 states have (on average 1.3728966346153846) internal successors, (9138), 6656 states have internal predecessors, (9138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:38,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6657 states to 6657 states and 9138 transitions. [2021-11-09 10:51:38,611 INFO L78 Accepts]: Start accepts. Automaton has 6657 states and 9138 transitions. Word has length 121 [2021-11-09 10:51:38,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:51:38,614 INFO L470 AbstractCegarLoop]: Abstraction has 6657 states and 9138 transitions. [2021-11-09 10:51:38,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:38,615 INFO L276 IsEmpty]: Start isEmpty. Operand 6657 states and 9138 transitions. [2021-11-09 10:51:38,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-09 10:51:38,623 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:51:38,624 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:51:38,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 10:51:38,624 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:51:38,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:38,626 INFO L85 PathProgramCache]: Analyzing trace with hash -523925634, now seen corresponding path program 1 times [2021-11-09 10:51:38,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:51:38,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134201511] [2021-11-09 10:51:38,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:38,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:51:38,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:38,792 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:51:38,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:51:38,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134201511] [2021-11-09 10:51:38,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134201511] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:51:38,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:51:38,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 10:51:38,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111256601] [2021-11-09 10:51:38,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:51:38,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:51:38,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:51:38,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:51:38,804 INFO L87 Difference]: Start difference. First operand 6657 states and 9138 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:43,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:51:43,811 INFO L93 Difference]: Finished difference Result 19637 states and 26969 transitions. [2021-11-09 10:51:43,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:51:43,826 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2021-11-09 10:51:43,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:51:43,925 INFO L225 Difference]: With dead ends: 19637 [2021-11-09 10:51:43,925 INFO L226 Difference]: Without dead ends: 12982 [2021-11-09 10:51:43,937 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:51:43,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12982 states. [2021-11-09 10:51:44,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12982 to 12175. [2021-11-09 10:51:44,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12175 states, 12174 states have (on average 1.2529160505996386) internal successors, (15253), 12174 states have internal predecessors, (15253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:44,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12175 states to 12175 states and 15253 transitions. [2021-11-09 10:51:44,306 INFO L78 Accepts]: Start accepts. Automaton has 12175 states and 15253 transitions. Word has length 127 [2021-11-09 10:51:44,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:51:44,307 INFO L470 AbstractCegarLoop]: Abstraction has 12175 states and 15253 transitions. [2021-11-09 10:51:44,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:44,308 INFO L276 IsEmpty]: Start isEmpty. Operand 12175 states and 15253 transitions. [2021-11-09 10:51:44,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-09 10:51:44,310 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:51:44,311 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:51:44,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 10:51:44,312 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:51:44,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:44,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1324072554, now seen corresponding path program 1 times [2021-11-09 10:51:44,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:51:44,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071816378] [2021-11-09 10:51:44,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:44,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:51:44,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:44,457 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:51:44,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:51:44,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071816378] [2021-11-09 10:51:44,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071816378] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:51:44,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:51:44,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 10:51:44,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473819203] [2021-11-09 10:51:44,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:51:44,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:51:44,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:51:44,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:51:44,462 INFO L87 Difference]: Start difference. First operand 12175 states and 15253 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:48,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:51:48,629 INFO L93 Difference]: Finished difference Result 25135 states and 31306 transitions. [2021-11-09 10:51:48,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:51:48,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 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 143 [2021-11-09 10:51:48,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:51:48,666 INFO L225 Difference]: With dead ends: 25135 [2021-11-09 10:51:48,666 INFO L226 Difference]: Without dead ends: 12962 [2021-11-09 10:51:48,684 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:51:48,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12962 states. [2021-11-09 10:51:48,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12962 to 12962. [2021-11-09 10:51:48,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12962 states, 12961 states have (on average 1.2379446030398888) internal successors, (16045), 12961 states have internal predecessors, (16045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:48,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12962 states to 12962 states and 16045 transitions. [2021-11-09 10:51:48,999 INFO L78 Accepts]: Start accepts. Automaton has 12962 states and 16045 transitions. Word has length 143 [2021-11-09 10:51:48,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:51:49,000 INFO L470 AbstractCegarLoop]: Abstraction has 12962 states and 16045 transitions. [2021-11-09 10:51:49,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:49,001 INFO L276 IsEmpty]: Start isEmpty. Operand 12962 states and 16045 transitions. [2021-11-09 10:51:49,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-09 10:51:49,003 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:51:49,004 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:51:49,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 10:51:49,004 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:51:49,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:49,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1155556459, now seen corresponding path program 1 times [2021-11-09 10:51:49,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:51:49,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833165032] [2021-11-09 10:51:49,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:49,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:51:49,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:49,099 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:51:49,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:51:49,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833165032] [2021-11-09 10:51:49,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833165032] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:51:49,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:51:49,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:51:49,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746502962] [2021-11-09 10:51:49,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:51:49,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:51:49,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:51:49,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:51:49,104 INFO L87 Difference]: Start difference. First operand 12962 states and 16045 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:54,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:51:54,171 INFO L93 Difference]: Finished difference Result 31448 states and 39970 transitions. [2021-11-09 10:51:54,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:51:54,173 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 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 150 [2021-11-09 10:51:54,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:51:54,223 INFO L225 Difference]: With dead ends: 31448 [2021-11-09 10:51:54,224 INFO L226 Difference]: Without dead ends: 19275 [2021-11-09 10:51:54,241 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:51:54,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19275 states. [2021-11-09 10:51:54,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19275 to 18478. [2021-11-09 10:51:54,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18478 states, 18477 states have (on average 1.2248200465443524) internal successors, (22631), 18477 states have internal predecessors, (22631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:54,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18478 states to 18478 states and 22631 transitions. [2021-11-09 10:51:54,741 INFO L78 Accepts]: Start accepts. Automaton has 18478 states and 22631 transitions. Word has length 150 [2021-11-09 10:51:54,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:51:54,742 INFO L470 AbstractCegarLoop]: Abstraction has 18478 states and 22631 transitions. [2021-11-09 10:51:54,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:54,742 INFO L276 IsEmpty]: Start isEmpty. Operand 18478 states and 22631 transitions. [2021-11-09 10:51:54,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-11-09 10:51:54,748 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:51:54,749 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-09 10:51:54,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 10:51:54,749 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:51:54,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:54,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1592160981, now seen corresponding path program 1 times [2021-11-09 10:51:54,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:51:54,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289884924] [2021-11-09 10:51:54,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:54,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:51:54,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:54,946 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-09 10:51:54,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:51:54,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289884924] [2021-11-09 10:51:54,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289884924] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:51:54,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:51:54,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:51:54,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417780126] [2021-11-09 10:51:54,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:51:54,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:51:54,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:51:54,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:51:54,951 INFO L87 Difference]: Start difference. First operand 18478 states and 22631 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:00,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:52:00,577 INFO L93 Difference]: Finished difference Result 42487 states and 53153 transitions. [2021-11-09 10:52:00,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:52:00,578 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 239 [2021-11-09 10:52:00,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:52:00,639 INFO L225 Difference]: With dead ends: 42487 [2021-11-09 10:52:00,640 INFO L226 Difference]: Without dead ends: 24798 [2021-11-09 10:52:00,662 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:52:00,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24798 states. [2021-11-09 10:52:01,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24798 to 24786. [2021-11-09 10:52:01,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24786 states, 24785 states have (on average 1.230260238047206) internal successors, (30492), 24785 states have internal predecessors, (30492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:01,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24786 states to 24786 states and 30492 transitions. [2021-11-09 10:52:01,221 INFO L78 Accepts]: Start accepts. Automaton has 24786 states and 30492 transitions. Word has length 239 [2021-11-09 10:52:01,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:52:01,222 INFO L470 AbstractCegarLoop]: Abstraction has 24786 states and 30492 transitions. [2021-11-09 10:52:01,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:01,223 INFO L276 IsEmpty]: Start isEmpty. Operand 24786 states and 30492 transitions. [2021-11-09 10:52:01,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2021-11-09 10:52:01,232 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:52:01,233 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:52:01,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 10:52:01,234 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:52:01,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:52:01,235 INFO L85 PathProgramCache]: Analyzing trace with hash -28316692, now seen corresponding path program 1 times [2021-11-09 10:52:01,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:52:01,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669773934] [2021-11-09 10:52:01,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:52:01,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:52:01,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:01,492 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:52:01,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:52:01,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669773934] [2021-11-09 10:52:01,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669773934] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:52:01,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:52:01,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:52:01,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150354071] [2021-11-09 10:52:01,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:52:01,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:52:01,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:52:01,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:52:01,496 INFO L87 Difference]: Start difference. First operand 24786 states and 30492 transitions. Second operand has 4 states, 4 states have (on average 79.0) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:08,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:52:08,844 INFO L93 Difference]: Finished difference Result 73224 states and 90680 transitions. [2021-11-09 10:52:08,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:52:08,845 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 79.0) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 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 316 [2021-11-09 10:52:08,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:52:08,944 INFO L225 Difference]: With dead ends: 73224 [2021-11-09 10:52:08,944 INFO L226 Difference]: Without dead ends: 49227 [2021-11-09 10:52:08,969 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:52:09,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49227 states. [2021-11-09 10:52:09,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49227 to 49213. [2021-11-09 10:52:09,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49213 states, 49212 states have (on average 1.2029992684711046) internal successors, (59202), 49212 states have internal predecessors, (59202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:10,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49213 states to 49213 states and 59202 transitions. [2021-11-09 10:52:10,089 INFO L78 Accepts]: Start accepts. Automaton has 49213 states and 59202 transitions. Word has length 316 [2021-11-09 10:52:10,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:52:10,090 INFO L470 AbstractCegarLoop]: Abstraction has 49213 states and 59202 transitions. [2021-11-09 10:52:10,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.0) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:10,091 INFO L276 IsEmpty]: Start isEmpty. Operand 49213 states and 59202 transitions. [2021-11-09 10:52:10,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2021-11-09 10:52:10,107 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:52:10,108 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:52:10,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 10:52:10,108 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:52:10,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:52:10,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1413029796, now seen corresponding path program 1 times [2021-11-09 10:52:10,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:52:10,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152204143] [2021-11-09 10:52:10,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:52:10,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:52:10,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:10,376 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 379 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-09 10:52:10,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:52:10,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152204143] [2021-11-09 10:52:10,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152204143] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:52:10,378 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:52:10,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:52:10,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331744929] [2021-11-09 10:52:10,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:52:10,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:52:10,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:52:10,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:52:10,383 INFO L87 Difference]: Start difference. First operand 49213 states and 59202 transitions. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:22,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:52:22,400 INFO L93 Difference]: Finished difference Result 138781 states and 168388 transitions. [2021-11-09 10:52:22,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:52:22,401 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 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 342 [2021-11-09 10:52:22,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:52:22,553 INFO L225 Difference]: With dead ends: 138781 [2021-11-09 10:52:22,553 INFO L226 Difference]: Without dead ends: 90357 [2021-11-09 10:52:22,585 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:52:22,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90357 states. [2021-11-09 10:52:24,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90357 to 90227. [2021-11-09 10:52:24,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90227 states, 90226 states have (on average 1.1906656617826348) internal successors, (107429), 90226 states have internal predecessors, (107429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:24,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90227 states to 90227 states and 107429 transitions. [2021-11-09 10:52:24,570 INFO L78 Accepts]: Start accepts. Automaton has 90227 states and 107429 transitions. Word has length 342 [2021-11-09 10:52:24,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:52:24,571 INFO L470 AbstractCegarLoop]: Abstraction has 90227 states and 107429 transitions. [2021-11-09 10:52:24,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:24,571 INFO L276 IsEmpty]: Start isEmpty. Operand 90227 states and 107429 transitions. [2021-11-09 10:52:24,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2021-11-09 10:52:24,583 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:52:24,584 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-09 10:52:24,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-09 10:52:24,584 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:52:24,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:52:24,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1271299818, now seen corresponding path program 1 times [2021-11-09 10:52:24,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:52:24,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041637226] [2021-11-09 10:52:24,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:52:24,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:52:24,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:25,366 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 117 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:52:25,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:52:25,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041637226] [2021-11-09 10:52:25,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041637226] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:52:25,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401982216] [2021-11-09 10:52:25,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:52:25,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:52:25,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5256604f-9eed-421c-a22d-20b3c3083919/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:52:25,378 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5256604f-9eed-421c-a22d-20b3c3083919/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:52:25,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5256604f-9eed-421c-a22d-20b3c3083919/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 10:52:25,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:25,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 10:52:25,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:52:28,356 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-09 10:52:28,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401982216] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:52:28,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:52:28,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-09 10:52:28,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520476445] [2021-11-09 10:52:28,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:52:28,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:52:28,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:52:28,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:52:28,368 INFO L87 Difference]: Start difference. First operand 90227 states and 107429 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:33,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:52:33,371 INFO L93 Difference]: Finished difference Result 167867 states and 201404 transitions. [2021-11-09 10:52:33,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:52:33,373 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 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 345 [2021-11-09 10:52:33,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:52:33,570 INFO L225 Difference]: With dead ends: 167867 [2021-11-09 10:52:33,571 INFO L226 Difference]: Without dead ends: 93390 [2021-11-09 10:52:33,641 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:52:33,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93390 states. [2021-11-09 10:52:35,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93390 to 91801. [2021-11-09 10:52:35,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91801 states, 91800 states have (on average 1.1878322440087146) internal successors, (109043), 91800 states have internal predecessors, (109043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:35,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91801 states to 91801 states and 109043 transitions. [2021-11-09 10:52:35,688 INFO L78 Accepts]: Start accepts. Automaton has 91801 states and 109043 transitions. Word has length 345 [2021-11-09 10:52:35,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:52:35,689 INFO L470 AbstractCegarLoop]: Abstraction has 91801 states and 109043 transitions. [2021-11-09 10:52:35,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:35,690 INFO L276 IsEmpty]: Start isEmpty. Operand 91801 states and 109043 transitions. [2021-11-09 10:52:35,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2021-11-09 10:52:35,707 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:52:35,707 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:52:35,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5256604f-9eed-421c-a22d-20b3c3083919/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 10:52:35,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5256604f-9eed-421c-a22d-20b3c3083919/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 10:52:35,934 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:52:35,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:52:35,934 INFO L85 PathProgramCache]: Analyzing trace with hash -850235256, now seen corresponding path program 1 times [2021-11-09 10:52:35,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:52:35,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140092274] [2021-11-09 10:52:35,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:52:35,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:52:36,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:36,252 INFO L134 CoverageAnalysis]: Checked inductivity of 692 backedges. 531 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-11-09 10:52:36,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:52:36,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140092274] [2021-11-09 10:52:36,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140092274] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:52:36,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:52:36,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:52:36,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596736553] [2021-11-09 10:52:36,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:52:36,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:52:36,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:52:36,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:52:36,258 INFO L87 Difference]: Start difference. First operand 91801 states and 109043 transitions. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:41,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:52:41,826 INFO L93 Difference]: Finished difference Result 182817 states and 217304 transitions. [2021-11-09 10:52:41,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:52:41,827 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 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 403 [2021-11-09 10:52:41,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:52:41,967 INFO L225 Difference]: With dead ends: 182817 [2021-11-09 10:52:41,967 INFO L226 Difference]: Without dead ends: 91805 [2021-11-09 10:52:42,020 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:52:42,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91805 states. [2021-11-09 10:52:43,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91805 to 91793. [2021-11-09 10:52:43,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91793 states, 91792 states have (on average 1.1372995468014642) internal successors, (104395), 91792 states have internal predecessors, (104395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:43,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91793 states to 91793 states and 104395 transitions. [2021-11-09 10:52:43,610 INFO L78 Accepts]: Start accepts. Automaton has 91793 states and 104395 transitions. Word has length 403 [2021-11-09 10:52:43,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:52:43,611 INFO L470 AbstractCegarLoop]: Abstraction has 91793 states and 104395 transitions. [2021-11-09 10:52:43,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:43,612 INFO L276 IsEmpty]: Start isEmpty. Operand 91793 states and 104395 transitions. [2021-11-09 10:52:43,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2021-11-09 10:52:43,627 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:52:43,628 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:52:43,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-09 10:52:43,629 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:52:43,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:52:43,630 INFO L85 PathProgramCache]: Analyzing trace with hash -137763772, now seen corresponding path program 1 times [2021-11-09 10:52:43,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:52:43,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267001230] [2021-11-09 10:52:43,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:52:43,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:52:43,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:43,916 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 370 proven. 0 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-11-09 10:52:43,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:52:43,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267001230] [2021-11-09 10:52:43,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267001230] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:52:43,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:52:43,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 10:52:43,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638026793] [2021-11-09 10:52:43,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:52:43,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:52:43,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:52:43,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:52:43,920 INFO L87 Difference]: Start difference. First operand 91793 states and 104395 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:49,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:52:49,802 INFO L93 Difference]: Finished difference Result 167847 states and 192284 transitions. [2021-11-09 10:52:49,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:52:49,808 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 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 427 [2021-11-09 10:52:49,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:52:49,949 INFO L225 Difference]: With dead ends: 167847 [2021-11-09 10:52:49,950 INFO L226 Difference]: Without dead ends: 91804 [2021-11-09 10:52:49,991 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:52:50,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91804 states. [2021-11-09 10:52:51,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91804 to 91793. [2021-11-09 10:52:51,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91793 states, 91792 states have (on average 1.1367548370228342) internal successors, (104345), 91792 states have internal predecessors, (104345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:51,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91793 states to 91793 states and 104345 transitions. [2021-11-09 10:52:51,491 INFO L78 Accepts]: Start accepts. Automaton has 91793 states and 104345 transitions. Word has length 427 [2021-11-09 10:52:51,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:52:51,492 INFO L470 AbstractCegarLoop]: Abstraction has 91793 states and 104345 transitions. [2021-11-09 10:52:51,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:51,493 INFO L276 IsEmpty]: Start isEmpty. Operand 91793 states and 104345 transitions. [2021-11-09 10:52:51,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2021-11-09 10:52:51,508 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:52:51,509 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:52:51,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-09 10:52:51,510 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:52:51,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:52:51,511 INFO L85 PathProgramCache]: Analyzing trace with hash 44906732, now seen corresponding path program 1 times [2021-11-09 10:52:51,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:52:51,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616551170] [2021-11-09 10:52:51,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:52:51,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:52:51,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:51,707 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 404 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-09 10:52:51,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:52:51,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616551170] [2021-11-09 10:52:51,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616551170] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:52:51,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:52:51,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:52:51,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387920749] [2021-11-09 10:52:51,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:52:51,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:52:51,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:52:51,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:52:51,713 INFO L87 Difference]: Start difference. First operand 91793 states and 104345 transitions. Second operand has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:58,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:52:58,411 INFO L93 Difference]: Finished difference Result 246518 states and 281711 transitions. [2021-11-09 10:52:58,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:52:58,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 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 434 [2021-11-09 10:52:58,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:52:58,647 INFO L225 Difference]: With dead ends: 246518 [2021-11-09 10:52:58,647 INFO L226 Difference]: Without dead ends: 152363 [2021-11-09 10:52:58,684 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:52:58,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152363 states. [2021-11-09 10:53:01,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152363 to 142120. [2021-11-09 10:53:01,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142120 states, 142119 states have (on average 1.108148804874788) internal successors, (157489), 142119 states have internal predecessors, (157489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:01,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142120 states to 142120 states and 157489 transitions. [2021-11-09 10:53:01,599 INFO L78 Accepts]: Start accepts. Automaton has 142120 states and 157489 transitions. Word has length 434 [2021-11-09 10:53:01,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:53:01,599 INFO L470 AbstractCegarLoop]: Abstraction has 142120 states and 157489 transitions. [2021-11-09 10:53:01,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:01,600 INFO L276 IsEmpty]: Start isEmpty. Operand 142120 states and 157489 transitions. [2021-11-09 10:53:01,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2021-11-09 10:53:01,621 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:53:01,622 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:53:01,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-09 10:53:01,623 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:53:01,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:53:01,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1669071297, now seen corresponding path program 1 times [2021-11-09 10:53:01,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:53:01,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302385925] [2021-11-09 10:53:01,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:53:01,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:53:01,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:53:01,936 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 207 proven. 75 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2021-11-09 10:53:01,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:53:01,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302385925] [2021-11-09 10:53:01,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302385925] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:53:01,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007204828] [2021-11-09 10:53:01,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:53:01,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:53:01,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5256604f-9eed-421c-a22d-20b3c3083919/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:53:01,942 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5256604f-9eed-421c-a22d-20b3c3083919/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:53:01,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5256604f-9eed-421c-a22d-20b3c3083919/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 10:53:02,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:53:02,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 10:53:02,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:53:04,065 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 207 proven. 0 refuted. 0 times theorem prover too weak. 514 trivial. 0 not checked. [2021-11-09 10:53:04,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007204828] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:53:04,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:53:04,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-11-09 10:53:04,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164700079] [2021-11-09 10:53:04,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:53:04,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:53:04,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:53:04,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:53:04,069 INFO L87 Difference]: Start difference. First operand 142120 states and 157489 transitions. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:09,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:53:09,741 INFO L93 Difference]: Finished difference Result 283440 states and 314176 transitions. [2021-11-09 10:53:09,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:53:09,742 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 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 451 [2021-11-09 10:53:09,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:53:09,964 INFO L225 Difference]: With dead ends: 283440 [2021-11-09 10:53:09,964 INFO L226 Difference]: Without dead ends: 142109 [2021-11-09 10:53:10,617 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:53:10,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142109 states. [2021-11-09 10:53:12,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142109 to 142106. [2021-11-09 10:53:12,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142106 states, 142105 states have (on average 1.0810808908905387) internal successors, (153627), 142105 states have internal predecessors, (153627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:12,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142106 states to 142106 states and 153627 transitions. [2021-11-09 10:53:12,970 INFO L78 Accepts]: Start accepts. Automaton has 142106 states and 153627 transitions. Word has length 451 [2021-11-09 10:53:12,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:53:12,971 INFO L470 AbstractCegarLoop]: Abstraction has 142106 states and 153627 transitions. [2021-11-09 10:53:12,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:12,971 INFO L276 IsEmpty]: Start isEmpty. Operand 142106 states and 153627 transitions. [2021-11-09 10:53:12,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2021-11-09 10:53:12,984 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:53:12,984 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:53:13,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5256604f-9eed-421c-a22d-20b3c3083919/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 10:53:13,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5256604f-9eed-421c-a22d-20b3c3083919/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-09 10:53:13,198 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:53:13,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:53:13,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1601864273, now seen corresponding path program 1 times [2021-11-09 10:53:13,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:53:13,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764689545] [2021-11-09 10:53:13,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:53:13,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:53:13,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:53:13,495 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 412 proven. 0 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-11-09 10:53:13,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:53:13,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764689545] [2021-11-09 10:53:13,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764689545] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:53:13,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:53:13,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:53:13,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7277634] [2021-11-09 10:53:13,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:53:13,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:53:13,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:53:13,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:53:13,500 INFO L87 Difference]: Start difference. First operand 142106 states and 153627 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:20,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:53:20,083 INFO L93 Difference]: Finished difference Result 295202 states and 319573 transitions. [2021-11-09 10:53:20,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:53:20,083 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 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 456 [2021-11-09 10:53:20,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:53:20,351 INFO L225 Difference]: With dead ends: 295202 [2021-11-09 10:53:20,352 INFO L226 Difference]: Without dead ends: 153884 [2021-11-09 10:53:20,426 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:53:20,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153884 states. [2021-11-09 10:53:22,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153884 to 153883. [2021-11-09 10:53:22,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153883 states, 153882 states have (on average 1.0601109941383657) internal successors, (163132), 153882 states have internal predecessors, (163132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:23,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153883 states to 153883 states and 163132 transitions. [2021-11-09 10:53:23,545 INFO L78 Accepts]: Start accepts. Automaton has 153883 states and 163132 transitions. Word has length 456 [2021-11-09 10:53:23,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:53:23,546 INFO L470 AbstractCegarLoop]: Abstraction has 153883 states and 163132 transitions. [2021-11-09 10:53:23,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:23,547 INFO L276 IsEmpty]: Start isEmpty. Operand 153883 states and 163132 transitions. [2021-11-09 10:53:23,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2021-11-09 10:53:23,609 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:53:23,610 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:53:23,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-09 10:53:23,611 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:53:23,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:53:23,612 INFO L85 PathProgramCache]: Analyzing trace with hash -312690779, now seen corresponding path program 1 times [2021-11-09 10:53:23,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:53:23,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6278423] [2021-11-09 10:53:23,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:53:23,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:53:23,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:53:24,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 558 proven. 100 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2021-11-09 10:53:24,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:53:24,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6278423] [2021-11-09 10:53:24,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6278423] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:53:24,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982078194] [2021-11-09 10:53:24,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:53:24,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:53:24,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5256604f-9eed-421c-a22d-20b3c3083919/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:53:24,093 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5256604f-9eed-421c-a22d-20b3c3083919/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:53:24,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5256604f-9eed-421c-a22d-20b3c3083919/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 10:53:24,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:53:24,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 10:53:24,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:53:27,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 809 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2021-11-09 10:53:27,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982078194] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:53:27,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:53:27,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-09 10:53:27,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592730028] [2021-11-09 10:53:27,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:53:27,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:53:27,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:53:27,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:53:27,363 INFO L87 Difference]: Start difference. First operand 153883 states and 163132 transitions. Second operand has 4 states, 4 states have (on average 101.75) internal successors, (407), 4 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:33,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:53:33,939 INFO L93 Difference]: Finished difference Result 297528 states and 315976 transitions. [2021-11-09 10:53:33,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:53:33,940 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 101.75) internal successors, (407), 4 states have internal predecessors, (407), 0 states have call successors, (0), 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 545 [2021-11-09 10:53:33,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:53:34,167 INFO L225 Difference]: With dead ends: 297528 [2021-11-09 10:53:34,167 INFO L226 Difference]: Without dead ends: 159393 [2021-11-09 10:53:34,232 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 548 GetRequests, 544 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:53:34,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159393 states. [2021-11-09 10:53:36,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159393 to 157031. [2021-11-09 10:53:37,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157031 states, 157030 states have (on average 1.057842450487168) internal successors, (166113), 157030 states have internal predecessors, (166113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:37,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157031 states to 157031 states and 166113 transitions. [2021-11-09 10:53:37,259 INFO L78 Accepts]: Start accepts. Automaton has 157031 states and 166113 transitions. Word has length 545 [2021-11-09 10:53:37,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:53:37,260 INFO L470 AbstractCegarLoop]: Abstraction has 157031 states and 166113 transitions. [2021-11-09 10:53:37,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.75) internal successors, (407), 4 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:37,260 INFO L276 IsEmpty]: Start isEmpty. Operand 157031 states and 166113 transitions. [2021-11-09 10:53:37,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 550 [2021-11-09 10:53:37,279 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:53:37,279 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:53:37,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5256604f-9eed-421c-a22d-20b3c3083919/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 10:53:37,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5256604f-9eed-421c-a22d-20b3c3083919/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-09 10:53:37,481 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:53:37,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:53:37,482 INFO L85 PathProgramCache]: Analyzing trace with hash -705129669, now seen corresponding path program 1 times [2021-11-09 10:53:37,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:53:37,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093141835] [2021-11-09 10:53:37,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:53:37,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:53:37,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:53:37,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 587 proven. 0 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2021-11-09 10:53:37,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:53:37,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093141835] [2021-11-09 10:53:37,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093141835] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:53:37,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:53:37,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:53:37,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842351181] [2021-11-09 10:53:37,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:53:37,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:53:37,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:53:37,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:53:37,831 INFO L87 Difference]: Start difference. First operand 157031 states and 166113 transitions. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:44,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:53:44,061 INFO L93 Difference]: Finished difference Result 314873 states and 333029 transitions. [2021-11-09 10:53:44,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:53:44,062 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 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 549 [2021-11-09 10:53:44,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:53:44,309 INFO L225 Difference]: With dead ends: 314873 [2021-11-09 10:53:44,309 INFO L226 Difference]: Without dead ends: 157053 [2021-11-09 10:53:44,392 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6