./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label04.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87b7a8b-2d8a-4870-8679-34d4c7d45ba5/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87b7a8b-2d8a-4870-8679-34d4c7d45ba5/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87b7a8b-2d8a-4870-8679-34d4c7d45ba5/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87b7a8b-2d8a-4870-8679-34d4c7d45ba5/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label04.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87b7a8b-2d8a-4870-8679-34d4c7d45ba5/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87b7a8b-2d8a-4870-8679-34d4c7d45ba5/bin/uautomizer-DQz5hQGWxF --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 2adccaef3712b0295c8f7cfd3e1ed73b8b25a6bf1026bcea89334476cfd41a2b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:36:56,544 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:36:56,547 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:36:56,578 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:36:56,578 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:36:56,580 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:36:56,581 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:36:56,584 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:36:56,586 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:36:56,587 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:36:56,589 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:36:56,590 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:36:56,591 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:36:56,592 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:36:56,594 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:36:56,595 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:36:56,596 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:36:56,598 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:36:56,600 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:36:56,603 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:36:56,605 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:36:56,607 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:36:56,609 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:36:56,610 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:36:56,614 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:36:56,614 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:36:56,615 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:36:56,616 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:36:56,616 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:36:56,618 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:36:56,618 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:36:56,619 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:36:56,620 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:36:56,621 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:36:56,623 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:36:56,623 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:36:56,624 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:36:56,624 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:36:56,625 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:36:56,626 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:36:56,627 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:36:56,628 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87b7a8b-2d8a-4870-8679-34d4c7d45ba5/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 07:36:56,654 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:36:56,654 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:36:56,655 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:36:56,655 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:36:56,656 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:36:56,656 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:36:56,657 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:36:56,657 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:36:56,658 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:36:56,658 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:36:56,659 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:36:56,659 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:36:56,659 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:36:56,660 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:36:56,660 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 07:36:56,660 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:36:56,661 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 07:36:56,661 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:36:56,661 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 07:36:56,662 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:36:56,662 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 07:36:56,662 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:36:56,663 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:36:56,663 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:36:56,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:36:56,664 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:36:56,664 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:36:56,665 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 07:36:56,665 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:36:56,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:36:56,666 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 07:36:56,666 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 07:36:56,666 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 07:36:56,666 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:36:56,667 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_c87b7a8b-2d8a-4870-8679-34d4c7d45ba5/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87b7a8b-2d8a-4870-8679-34d4c7d45ba5/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2adccaef3712b0295c8f7cfd3e1ed73b8b25a6bf1026bcea89334476cfd41a2b [2021-11-20 07:36:56,897 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:36:56,929 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:36:56,932 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:36:56,933 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:36:56,934 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:36:56,935 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87b7a8b-2d8a-4870-8679-34d4c7d45ba5/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/eca-rers2012/Problem13_label04.c [2021-11-20 07:36:57,001 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87b7a8b-2d8a-4870-8679-34d4c7d45ba5/bin/uautomizer-DQz5hQGWxF/data/b154af2c4/8fdb57209a494cdaa5805718341ab464/FLAG7f1db54a2 [2021-11-20 07:36:57,974 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:36:57,975 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87b7a8b-2d8a-4870-8679-34d4c7d45ba5/sv-benchmarks/c/eca-rers2012/Problem13_label04.c [2021-11-20 07:36:58,017 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87b7a8b-2d8a-4870-8679-34d4c7d45ba5/bin/uautomizer-DQz5hQGWxF/data/b154af2c4/8fdb57209a494cdaa5805718341ab464/FLAG7f1db54a2 [2021-11-20 07:36:58,434 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87b7a8b-2d8a-4870-8679-34d4c7d45ba5/bin/uautomizer-DQz5hQGWxF/data/b154af2c4/8fdb57209a494cdaa5805718341ab464 [2021-11-20 07:36:58,438 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:36:58,440 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:36:58,444 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:36:58,445 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:36:58,448 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:36:58,449 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:36:58" (1/1) ... [2021-11-20 07:36:58,450 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19a5e2b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:36:58, skipping insertion in model container [2021-11-20 07:36:58,450 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:36:58" (1/1) ... [2021-11-20 07:36:58,458 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:36:58,660 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:36:59,017 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87b7a8b-2d8a-4870-8679-34d4c7d45ba5/sv-benchmarks/c/eca-rers2012/Problem13_label04.c[2611,2624] [2021-11-20 07:37:00,212 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:37:00,221 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:37:00,258 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87b7a8b-2d8a-4870-8679-34d4c7d45ba5/sv-benchmarks/c/eca-rers2012/Problem13_label04.c[2611,2624] [2021-11-20 07:37:00,997 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:37:01,024 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:37:01,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:37:01 WrapperNode [2021-11-20 07:37:01,024 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:37:01,025 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:37:01,026 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:37:01,026 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:37:01,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:37:01" (1/1) ... [2021-11-20 07:37:01,121 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:37:01" (1/1) ... [2021-11-20 07:37:01,741 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-11-20 07:37:01,741 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:37:01,742 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:37:01,742 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:37:01,743 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:37:01,751 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:37:01" (1/1) ... [2021-11-20 07:37:01,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:37:01" (1/1) ... [2021-11-20 07:37:01,997 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:37:01" (1/1) ... [2021-11-20 07:37:02,012 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:37:01" (1/1) ... [2021-11-20 07:37:02,241 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:37:01" (1/1) ... [2021-11-20 07:37:02,270 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:37:01" (1/1) ... [2021-11-20 07:37:02,328 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:37:01" (1/1) ... [2021-11-20 07:37:02,449 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:37:02,449 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:37:02,450 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:37:02,450 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:37:02,455 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:37:01" (1/1) ... [2021-11-20 07:37:02,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:37:02,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87b7a8b-2d8a-4870-8679-34d4c7d45ba5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:37:02,523 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87b7a8b-2d8a-4870-8679-34d4c7d45ba5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:37:02,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87b7a8b-2d8a-4870-8679-34d4c7d45ba5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:37:02,611 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:37:02,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:37:02,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:37:02,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:37:02,717 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:37:02,718 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:37:08,262 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:37:08,293 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:37:08,293 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 07:37:08,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:37:08 BoogieIcfgContainer [2021-11-20 07:37:08,297 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:37:08,302 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:37:08,302 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:37:08,306 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:37:08,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:36:58" (1/3) ... [2021-11-20 07:37:08,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dca62b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:37:08, skipping insertion in model container [2021-11-20 07:37:08,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:37:01" (2/3) ... [2021-11-20 07:37:08,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dca62b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:37:08, skipping insertion in model container [2021-11-20 07:37:08,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:37:08" (3/3) ... [2021-11-20 07:37:08,309 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label04.c [2021-11-20 07:37:08,314 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:37:08,315 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 07:37:08,385 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:37:08,392 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 [2021-11-20 07:37:08,392 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 07:37:08,434 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) [2021-11-20 07:37:08,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 07:37:08,440 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:37:08,440 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:37:08,441 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:37:08,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:37:08,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1657508526, now seen corresponding path program 1 times [2021-11-20 07:37:08,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:37:08,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832709465] [2021-11-20 07:37:08,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:08,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:37:08,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:08,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:37:08,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:37:08,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832709465] [2021-11-20 07:37:08,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832709465] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:37:08,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:37:08,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:37:08,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743110567] [2021-11-20 07:37:08,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:37:08,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:37:08,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:37:08,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:37:08,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:37:08,670 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 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:13,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:37:13,749 INFO L93 Difference]: Finished difference Result 3147 states and 5806 transitions. [2021-11-20 07:37:13,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:37:13,752 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-11-20 07:37:13,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:37:13,791 INFO L225 Difference]: With dead ends: 3147 [2021-11-20 07:37:13,791 INFO L226 Difference]: Without dead ends: 1964 [2021-11-20 07:37:13,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:37:13,801 INFO L933 BasicCegarLoop]: 764 mSDtfsCounter, 1163 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 2714 mSolverCounterSat, 584 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1163 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 3298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 584 IncrementalHoareTripleChecker+Valid, 2714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:37:13,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1163 Valid, 992 Invalid, 3298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [584 Valid, 2714 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-11-20 07:37:13,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1964 states. [2021-11-20 07:37:13,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 1951. [2021-11-20 07:37:13,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1951 states, 1950 states have (on average 1.6538461538461537) internal successors, (3225), 1950 states have internal predecessors, (3225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:13,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1951 states to 1951 states and 3225 transitions. [2021-11-20 07:37:13,927 INFO L78 Accepts]: Start accepts. Automaton has 1951 states and 3225 transitions. Word has length 16 [2021-11-20 07:37:13,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:37:13,927 INFO L470 AbstractCegarLoop]: Abstraction has 1951 states and 3225 transitions. [2021-11-20 07:37:13,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:13,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1951 states and 3225 transitions. [2021-11-20 07:37:13,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-20 07:37:13,931 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:37:13,931 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 07:37:13,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 07:37:13,932 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:37:13,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:37:13,933 INFO L85 PathProgramCache]: Analyzing trace with hash -9926837, now seen corresponding path program 1 times [2021-11-20 07:37:13,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:37:13,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326384182] [2021-11-20 07:37:13,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:13,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:37:14,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:14,089 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:37:14,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:37:14,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326384182] [2021-11-20 07:37:14,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326384182] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:37:14,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:37:14,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:37:14,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995134656] [2021-11-20 07:37:14,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:37:14,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:37:14,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:37:14,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:37:14,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:37:14,094 INFO L87 Difference]: Start difference. First operand 1951 states and 3225 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:18,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:37:18,814 INFO L93 Difference]: Finished difference Result 5540 states and 9221 transitions. [2021-11-20 07:37:18,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:37:18,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-20 07:37:18,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:37:18,840 INFO L225 Difference]: With dead ends: 5540 [2021-11-20 07:37:18,840 INFO L226 Difference]: Without dead ends: 3591 [2021-11-20 07:37:18,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:37:18,850 INFO L933 BasicCegarLoop]: 871 mSDtfsCounter, 923 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 2591 mSolverCounterSat, 750 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 3341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 750 IncrementalHoareTripleChecker+Valid, 2591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:37:18,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [923 Valid, 1007 Invalid, 3341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [750 Valid, 2591 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-11-20 07:37:18,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3591 states. [2021-11-20 07:37:18,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3591 to 3581. [2021-11-20 07:37:18,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3581 states, 3580 states have (on average 1.5050279329608938) internal successors, (5388), 3580 states have internal predecessors, (5388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:18,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3581 states to 3581 states and 5388 transitions. [2021-11-20 07:37:18,946 INFO L78 Accepts]: Start accepts. Automaton has 3581 states and 5388 transitions. Word has length 87 [2021-11-20 07:37:18,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:37:18,947 INFO L470 AbstractCegarLoop]: Abstraction has 3581 states and 5388 transitions. [2021-11-20 07:37:18,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:18,948 INFO L276 IsEmpty]: Start isEmpty. Operand 3581 states and 5388 transitions. [2021-11-20 07:37:18,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-20 07:37:18,958 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:37:18,959 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:37:18,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 07:37:18,963 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:37:18,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:37:18,963 INFO L85 PathProgramCache]: Analyzing trace with hash 152230728, now seen corresponding path program 1 times [2021-11-20 07:37:18,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:37:18,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751346208] [2021-11-20 07:37:18,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:18,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:37:19,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:19,155 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:37:19,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:37:19,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751346208] [2021-11-20 07:37:19,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751346208] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:37:19,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:37:19,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:37:19,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101963702] [2021-11-20 07:37:19,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:37:19,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:37:19,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:37:19,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:37:19,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:37:19,162 INFO L87 Difference]: Start difference. First operand 3581 states and 5388 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:23,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:37:23,233 INFO L93 Difference]: Finished difference Result 10352 states and 15625 transitions. [2021-11-20 07:37:23,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:37:23,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 0 states have call successors, (0), 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 101 [2021-11-20 07:37:23,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:37:23,273 INFO L225 Difference]: With dead ends: 10352 [2021-11-20 07:37:23,273 INFO L226 Difference]: Without dead ends: 6773 [2021-11-20 07:37:23,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:37:23,281 INFO L933 BasicCegarLoop]: 1021 mSDtfsCounter, 785 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 2491 mSolverCounterSat, 786 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 3277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 786 IncrementalHoareTripleChecker+Valid, 2491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:37:23,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [785 Valid, 1172 Invalid, 3277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [786 Valid, 2491 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-20 07:37:23,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6773 states. [2021-11-20 07:37:23,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6773 to 6749. [2021-11-20 07:37:23,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6749 states, 6748 states have (on average 1.3252815649081209) internal successors, (8943), 6748 states have internal predecessors, (8943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:23,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6749 states to 6749 states and 8943 transitions. [2021-11-20 07:37:23,431 INFO L78 Accepts]: Start accepts. Automaton has 6749 states and 8943 transitions. Word has length 101 [2021-11-20 07:37:23,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:37:23,432 INFO L470 AbstractCegarLoop]: Abstraction has 6749 states and 8943 transitions. [2021-11-20 07:37:23,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:23,433 INFO L276 IsEmpty]: Start isEmpty. Operand 6749 states and 8943 transitions. [2021-11-20 07:37:23,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-20 07:37:23,442 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:37:23,442 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:37:23,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 07:37:23,443 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:37:23,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:37:23,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1958755326, now seen corresponding path program 1 times [2021-11-20 07:37:23,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:37:23,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347524616] [2021-11-20 07:37:23,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:23,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:37:23,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:23,578 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:37:23,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:37:23,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347524616] [2021-11-20 07:37:23,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347524616] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:37:23,579 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:37:23,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:37:23,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399697195] [2021-11-20 07:37:23,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:37:23,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:37:23,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:37:23,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:37:23,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:37:23,582 INFO L87 Difference]: Start difference. First operand 6749 states and 8943 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:27,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:37:27,194 INFO L93 Difference]: Finished difference Result 19804 states and 26220 transitions. [2021-11-20 07:37:27,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:37:27,199 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 0 states have call successors, (0), 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 130 [2021-11-20 07:37:27,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:37:27,263 INFO L225 Difference]: With dead ends: 19804 [2021-11-20 07:37:27,263 INFO L226 Difference]: Without dead ends: 13057 [2021-11-20 07:37:27,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:37:27,273 INFO L933 BasicCegarLoop]: 883 mSDtfsCounter, 865 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 2330 mSolverCounterSat, 875 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 3205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 875 IncrementalHoareTripleChecker+Valid, 2330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:37:27,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [865 Valid, 1035 Invalid, 3205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [875 Valid, 2330 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-20 07:37:27,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13057 states. [2021-11-20 07:37:27,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13057 to 13052. [2021-11-20 07:37:27,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13052 states, 13051 states have (on average 1.217914336066202) internal successors, (15895), 13051 states have internal predecessors, (15895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:27,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13052 states to 13052 states and 15895 transitions. [2021-11-20 07:37:27,543 INFO L78 Accepts]: Start accepts. Automaton has 13052 states and 15895 transitions. Word has length 130 [2021-11-20 07:37:27,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:37:27,544 INFO L470 AbstractCegarLoop]: Abstraction has 13052 states and 15895 transitions. [2021-11-20 07:37:27,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:27,544 INFO L276 IsEmpty]: Start isEmpty. Operand 13052 states and 15895 transitions. [2021-11-20 07:37:27,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-20 07:37:27,548 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:37:27,548 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:37:27,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 07:37:27,549 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:37:27,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:37:27,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1184373553, now seen corresponding path program 1 times [2021-11-20 07:37:27,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:37:27,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210361173] [2021-11-20 07:37:27,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:27,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:37:27,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:27,729 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 07:37:27,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:37:27,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210361173] [2021-11-20 07:37:27,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210361173] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:37:27,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:37:27,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:37:27,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101519277] [2021-11-20 07:37:27,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:37:27,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:37:27,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:37:27,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:37:27,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:37:27,733 INFO L87 Difference]: Start difference. First operand 13052 states and 15895 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:30,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:37:30,839 INFO L93 Difference]: Finished difference Result 26889 states and 32590 transitions. [2021-11-20 07:37:30,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:37:30,839 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 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 208 [2021-11-20 07:37:30,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:37:30,882 INFO L225 Difference]: With dead ends: 26889 [2021-11-20 07:37:30,882 INFO L226 Difference]: Without dead ends: 13839 [2021-11-20 07:37:30,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:37:30,897 INFO L933 BasicCegarLoop]: 1084 mSDtfsCounter, 700 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2521 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 1213 SdHoareTripleChecker+Invalid, 2530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:37:30,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 1213 Invalid, 2530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2521 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-20 07:37:30,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13839 states. [2021-11-20 07:37:31,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13839 to 13839. [2021-11-20 07:37:31,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13839 states, 13838 states have (on average 1.2058823529411764) internal successors, (16687), 13838 states have internal predecessors, (16687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:31,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13839 states to 13839 states and 16687 transitions. [2021-11-20 07:37:31,269 INFO L78 Accepts]: Start accepts. Automaton has 13839 states and 16687 transitions. Word has length 208 [2021-11-20 07:37:31,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:37:31,271 INFO L470 AbstractCegarLoop]: Abstraction has 13839 states and 16687 transitions. [2021-11-20 07:37:31,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:31,276 INFO L276 IsEmpty]: Start isEmpty. Operand 13839 states and 16687 transitions. [2021-11-20 07:37:31,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-11-20 07:37:31,280 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:37:31,280 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:37:31,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 07:37:31,281 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:37:31,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:37:31,282 INFO L85 PathProgramCache]: Analyzing trace with hash 25568218, now seen corresponding path program 1 times [2021-11-20 07:37:31,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:37:31,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105354538] [2021-11-20 07:37:31,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:31,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:37:31,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:31,456 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:37:31,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:37:31,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105354538] [2021-11-20 07:37:31,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105354538] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:37:31,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:37:31,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:37:31,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146871206] [2021-11-20 07:37:31,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:37:31,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:37:31,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:37:31,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:37:31,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:37:31,460 INFO L87 Difference]: Start difference. First operand 13839 states and 16687 transitions. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:35,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:37:35,259 INFO L93 Difference]: Finished difference Result 33200 states and 41058 transitions. [2021-11-20 07:37:35,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:37:35,260 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 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 215 [2021-11-20 07:37:35,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:37:35,298 INFO L225 Difference]: With dead ends: 33200 [2021-11-20 07:37:35,299 INFO L226 Difference]: Without dead ends: 20150 [2021-11-20 07:37:35,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:37:35,313 INFO L933 BasicCegarLoop]: 823 mSDtfsCounter, 862 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 2388 mSolverCounterSat, 918 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 3306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 918 IncrementalHoareTripleChecker+Valid, 2388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:37:35,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [862 Valid, 942 Invalid, 3306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [918 Valid, 2388 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-11-20 07:37:35,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20150 states. [2021-11-20 07:37:35,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20150 to 20140. [2021-11-20 07:37:35,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20140 states, 20139 states have (on average 1.1900789512885446) internal successors, (23967), 20139 states have internal predecessors, (23967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:35,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20140 states to 20140 states and 23967 transitions. [2021-11-20 07:37:35,616 INFO L78 Accepts]: Start accepts. Automaton has 20140 states and 23967 transitions. Word has length 215 [2021-11-20 07:37:35,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:37:35,617 INFO L470 AbstractCegarLoop]: Abstraction has 20140 states and 23967 transitions. [2021-11-20 07:37:35,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:35,617 INFO L276 IsEmpty]: Start isEmpty. Operand 20140 states and 23967 transitions. [2021-11-20 07:37:35,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-11-20 07:37:35,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:37:35,621 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:37:35,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 07:37:35,622 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:37:35,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:37:35,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1322212109, now seen corresponding path program 1 times [2021-11-20 07:37:35,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:37:35,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993305403] [2021-11-20 07:37:35,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:35,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:37:35,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:35,742 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:37:35,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:37:35,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993305403] [2021-11-20 07:37:35,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993305403] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:37:35,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:37:35,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:37:35,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673482109] [2021-11-20 07:37:35,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:37:35,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:37:35,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:37:35,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:37:35,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:37:35,745 INFO L87 Difference]: Start difference. First operand 20140 states and 23967 transitions. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:39,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:37:39,172 INFO L93 Difference]: Finished difference Result 39361 states and 46961 transitions. [2021-11-20 07:37:39,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:37:39,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 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 230 [2021-11-20 07:37:39,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:37:39,211 INFO L225 Difference]: With dead ends: 39361 [2021-11-20 07:37:39,212 INFO L226 Difference]: Without dead ends: 20010 [2021-11-20 07:37:39,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:37:39,228 INFO L933 BasicCegarLoop]: 1505 mSDtfsCounter, 1037 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2350 mSolverCounterSat, 602 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1037 SdHoareTripleChecker+Valid, 1642 SdHoareTripleChecker+Invalid, 2952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 602 IncrementalHoareTripleChecker+Valid, 2350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:37:39,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1037 Valid, 1642 Invalid, 2952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [602 Valid, 2350 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-20 07:37:39,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20010 states. [2021-11-20 07:37:39,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20010 to 19219. [2021-11-20 07:37:39,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19219 states, 19218 states have (on average 1.1323238630450618) internal successors, (21761), 19218 states have internal predecessors, (21761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:39,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19219 states to 19219 states and 21761 transitions. [2021-11-20 07:37:39,472 INFO L78 Accepts]: Start accepts. Automaton has 19219 states and 21761 transitions. Word has length 230 [2021-11-20 07:37:39,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:37:39,473 INFO L470 AbstractCegarLoop]: Abstraction has 19219 states and 21761 transitions. [2021-11-20 07:37:39,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:39,473 INFO L276 IsEmpty]: Start isEmpty. Operand 19219 states and 21761 transitions. [2021-11-20 07:37:39,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2021-11-20 07:37:39,479 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:37:39,480 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 07:37:39,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 07:37:39,480 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:37:39,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:37:39,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1023656445, now seen corresponding path program 1 times [2021-11-20 07:37:39,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:37:39,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844475834] [2021-11-20 07:37:39,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:39,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:37:39,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:39,647 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 289 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 07:37:39,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:37:39,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844475834] [2021-11-20 07:37:39,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844475834] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:37:39,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:37:39,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:37:39,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144899615] [2021-11-20 07:37:39,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:37:39,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:37:39,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:37:39,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:37:39,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:37:39,650 INFO L87 Difference]: Start difference. First operand 19219 states and 21761 transitions. Second operand has 4 states, 4 states have (on average 71.5) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:46,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:37:46,837 INFO L93 Difference]: Finished difference Result 70903 states and 80409 transitions. [2021-11-20 07:37:46,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:37:46,838 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 71.5) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 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 299 [2021-11-20 07:37:46,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:37:46,895 INFO L225 Difference]: With dead ends: 70903 [2021-11-20 07:37:46,895 INFO L226 Difference]: Without dead ends: 52473 [2021-11-20 07:37:46,909 INFO L932 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 [2021-11-20 07:37:46,910 INFO L933 BasicCegarLoop]: 573 mSDtfsCounter, 1706 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 6640 mSolverCounterSat, 1037 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1706 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 7677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1037 IncrementalHoareTripleChecker+Valid, 6640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:37:46,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1706 Valid, 810 Invalid, 7677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1037 Valid, 6640 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2021-11-20 07:37:46,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52473 states. [2021-11-20 07:37:47,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52473 to 50782. [2021-11-20 07:37:47,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50782 states, 50781 states have (on average 1.116401803824265) internal successors, (56692), 50781 states have internal predecessors, (56692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:47,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50782 states to 50782 states and 56692 transitions. [2021-11-20 07:37:47,518 INFO L78 Accepts]: Start accepts. Automaton has 50782 states and 56692 transitions. Word has length 299 [2021-11-20 07:37:47,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:37:47,519 INFO L470 AbstractCegarLoop]: Abstraction has 50782 states and 56692 transitions. [2021-11-20 07:37:47,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.5) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:47,519 INFO L276 IsEmpty]: Start isEmpty. Operand 50782 states and 56692 transitions. [2021-11-20 07:37:47,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2021-11-20 07:37:47,526 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:37:47,526 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 07:37:47,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 07:37:47,527 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:37:47,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:37:47,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1837894397, now seen corresponding path program 1 times [2021-11-20 07:37:47,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:37:47,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736633774] [2021-11-20 07:37:47,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:47,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:37:47,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:47,665 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 196 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-20 07:37:47,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:37:47,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736633774] [2021-11-20 07:37:47,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736633774] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:37:47,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:37:47,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:37:47,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870903905] [2021-11-20 07:37:47,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:37:47,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:37:47,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:37:47,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:37:47,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:37:47,668 INFO L87 Difference]: Start difference. First operand 50782 states and 56692 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:51,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:37:51,487 INFO L93 Difference]: Finished difference Result 111025 states and 123695 transitions. [2021-11-20 07:37:51,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:37:51,487 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 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 313 [2021-11-20 07:37:51,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:37:51,562 INFO L225 Difference]: With dead ends: 111025 [2021-11-20 07:37:51,562 INFO L226 Difference]: Without dead ends: 60245 [2021-11-20 07:37:51,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:37:51,589 INFO L933 BasicCegarLoop]: 1001 mSDtfsCounter, 726 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 2689 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 726 SdHoareTripleChecker+Valid, 1177 SdHoareTripleChecker+Invalid, 2870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 2689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:37:51,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [726 Valid, 1177 Invalid, 2870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 2689 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-20 07:37:51,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60245 states. [2021-11-20 07:37:52,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60245 to 59450. [2021-11-20 07:37:52,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59450 states, 59449 states have (on average 1.1065282847482716) internal successors, (65782), 59449 states have internal predecessors, (65782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:52,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59450 states to 59450 states and 65782 transitions. [2021-11-20 07:37:52,267 INFO L78 Accepts]: Start accepts. Automaton has 59450 states and 65782 transitions. Word has length 313 [2021-11-20 07:37:52,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:37:52,268 INFO L470 AbstractCegarLoop]: Abstraction has 59450 states and 65782 transitions. [2021-11-20 07:37:52,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:52,269 INFO L276 IsEmpty]: Start isEmpty. Operand 59450 states and 65782 transitions. [2021-11-20 07:37:52,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2021-11-20 07:37:52,276 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:37:52,276 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:37:52,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 07:37:52,277 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:37:52,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:37:52,277 INFO L85 PathProgramCache]: Analyzing trace with hash -820854567, now seen corresponding path program 1 times [2021-11-20 07:37:52,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:37:52,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080405117] [2021-11-20 07:37:52,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:52,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:37:52,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:53,064 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 196 proven. 113 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 07:37:53,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:37:53,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080405117] [2021-11-20 07:37:53,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080405117] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:37:53,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898185521] [2021-11-20 07:37:53,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:53,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:37:53,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87b7a8b-2d8a-4870-8679-34d4c7d45ba5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:37:53,077 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87b7a8b-2d8a-4870-8679-34d4c7d45ba5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:37:53,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87b7a8b-2d8a-4870-8679-34d4c7d45ba5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 07:37:53,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:53,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 07:37:53,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:37:54,110 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 196 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-20 07:37:54,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:37:54,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898185521] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:37:54,111 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:37:54,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-11-20 07:37:54,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536900339] [2021-11-20 07:37:54,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:37:54,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:37:54,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:37:54,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:37:54,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:37:54,114 INFO L87 Difference]: Start difference. First operand 59450 states and 65782 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:57,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:37:57,490 INFO L93 Difference]: Finished difference Result 118109 states and 130769 transitions. [2021-11-20 07:37:57,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:37:57,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 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 [2021-11-20 07:37:57,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:37:57,541 INFO L225 Difference]: With dead ends: 118109 [2021-11-20 07:37:57,542 INFO L226 Difference]: Without dead ends: 59448 [2021-11-20 07:37:57,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:37:57,566 INFO L933 BasicCegarLoop]: 1344 mSDtfsCounter, 1113 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 2463 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1113 SdHoareTripleChecker+Valid, 1424 SdHoareTripleChecker+Invalid, 2907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 2463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:37:57,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1113 Valid, 1424 Invalid, 2907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 2463 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-20 07:37:57,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59448 states. [2021-11-20 07:37:58,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59448 to 59447. [2021-11-20 07:37:58,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59447 states, 59446 states have (on average 1.0850015139790734) internal successors, (64499), 59446 states have internal predecessors, (64499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:58,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59447 states to 59447 states and 64499 transitions. [2021-11-20 07:37:58,468 INFO L78 Accepts]: Start accepts. Automaton has 59447 states and 64499 transitions. Word has length 342 [2021-11-20 07:37:58,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:37:58,469 INFO L470 AbstractCegarLoop]: Abstraction has 59447 states and 64499 transitions. [2021-11-20 07:37:58,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:58,470 INFO L276 IsEmpty]: Start isEmpty. Operand 59447 states and 64499 transitions. [2021-11-20 07:37:58,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2021-11-20 07:37:58,477 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:37:58,478 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 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] [2021-11-20 07:37:58,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87b7a8b-2d8a-4870-8679-34d4c7d45ba5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:37:58,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87b7a8b-2d8a-4870-8679-34d4c7d45ba5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:37:58,696 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:37:58,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:37:58,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1208469246, now seen corresponding path program 1 times [2021-11-20 07:37:58,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:37:58,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795551964] [2021-11-20 07:37:58,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:58,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:37:58,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:59,062 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2021-11-20 07:37:59,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:37:59,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795551964] [2021-11-20 07:37:59,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795551964] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:37:59,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:37:59,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:37:59,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671022518] [2021-11-20 07:37:59,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:37:59,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:37:59,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:37:59,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:37:59,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:37:59,066 INFO L87 Difference]: Start difference. First operand 59447 states and 64499 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:03,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:38:03,291 INFO L93 Difference]: Finished difference Result 133075 states and 145734 transitions. [2021-11-20 07:38:03,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:38:03,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 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 [2021-11-20 07:38:03,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:38:03,366 INFO L225 Difference]: With dead ends: 133075 [2021-11-20 07:38:03,366 INFO L226 Difference]: Without dead ends: 83085 [2021-11-20 07:38:03,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:38:03,385 INFO L933 BasicCegarLoop]: 647 mSDtfsCounter, 951 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 2957 mSolverCounterSat, 517 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 951 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 3474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 517 IncrementalHoareTripleChecker+Valid, 2957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:38:03,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [951 Valid, 795 Invalid, 3474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [517 Valid, 2957 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-11-20 07:38:03,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83085 states. [2021-11-20 07:38:04,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83085 to 83076. [2021-11-20 07:38:04,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83076 states, 83075 states have (on average 1.087896479085164) internal successors, (90377), 83075 states have internal predecessors, (90377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:04,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83076 states to 83076 states and 90377 transitions. [2021-11-20 07:38:04,559 INFO L78 Accepts]: Start accepts. Automaton has 83076 states and 90377 transitions. Word has length 345 [2021-11-20 07:38:04,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:38:04,559 INFO L470 AbstractCegarLoop]: Abstraction has 83076 states and 90377 transitions. [2021-11-20 07:38:04,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:04,560 INFO L276 IsEmpty]: Start isEmpty. Operand 83076 states and 90377 transitions. [2021-11-20 07:38:04,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2021-11-20 07:38:04,568 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:38:04,568 INFO L514 BasicCegarLoop]: trace histogram [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, 4, 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:38:04,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 07:38:04,569 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:38:04,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:38:04,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1519622775, now seen corresponding path program 1 times [2021-11-20 07:38:04,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:38:04,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979867641] [2021-11-20 07:38:04,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:04,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:38:04,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:04,968 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 384 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-11-20 07:38:04,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:38:04,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979867641] [2021-11-20 07:38:04,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979867641] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:38:04,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:38:04,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:38:04,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081161300] [2021-11-20 07:38:04,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:38:04,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:38:04,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:38:04,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:38:04,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:38:04,971 INFO L87 Difference]: Start difference. First operand 83076 states and 90377 transitions. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:09,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:38:09,256 INFO L93 Difference]: Finished difference Result 192128 states and 210608 transitions. [2021-11-20 07:38:09,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:38:09,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 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 372 [2021-11-20 07:38:09,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:38:09,371 INFO L225 Difference]: With dead ends: 192128 [2021-11-20 07:38:09,371 INFO L226 Difference]: Without dead ends: 109841 [2021-11-20 07:38:09,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:38:09,400 INFO L933 BasicCegarLoop]: 822 mSDtfsCounter, 884 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2419 mSolverCounterSat, 930 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 3349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 930 IncrementalHoareTripleChecker+Valid, 2419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:38:09,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [884 Valid, 904 Invalid, 3349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [930 Valid, 2419 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-11-20 07:38:09,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109841 states. [2021-11-20 07:38:10,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109841 to 107461. [2021-11-20 07:38:10,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107461 states, 107460 states have (on average 1.091531732737763) internal successors, (117296), 107460 states have internal predecessors, (117296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:10,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107461 states to 107461 states and 117296 transitions. [2021-11-20 07:38:10,700 INFO L78 Accepts]: Start accepts. Automaton has 107461 states and 117296 transitions. Word has length 372 [2021-11-20 07:38:10,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:38:10,701 INFO L470 AbstractCegarLoop]: Abstraction has 107461 states and 117296 transitions. [2021-11-20 07:38:10,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:10,702 INFO L276 IsEmpty]: Start isEmpty. Operand 107461 states and 117296 transitions. [2021-11-20 07:38:10,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2021-11-20 07:38:10,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:38:10,710 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:38:10,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 07:38:10,710 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:38:10,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:38:10,711 INFO L85 PathProgramCache]: Analyzing trace with hash -201282790, now seen corresponding path program 1 times [2021-11-20 07:38:10,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:38:10,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295518761] [2021-11-20 07:38:10,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:10,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:38:10,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:11,227 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2021-11-20 07:38:11,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:38:11,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295518761] [2021-11-20 07:38:11,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295518761] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:38:11,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:38:11,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:38:11,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037209773] [2021-11-20 07:38:11,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:38:11,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:38:11,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:38:11,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:38:11,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:38:11,230 INFO L87 Difference]: Start difference. First operand 107461 states and 117296 transitions. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:15,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:38:15,228 INFO L93 Difference]: Finished difference Result 216498 states and 236184 transitions. [2021-11-20 07:38:15,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:38:15,229 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 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 405 [2021-11-20 07:38:15,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:38:15,339 INFO L225 Difference]: With dead ends: 216498 [2021-11-20 07:38:15,339 INFO L226 Difference]: Without dead ends: 109826 [2021-11-20 07:38:15,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:38:15,376 INFO L933 BasicCegarLoop]: 1386 mSDtfsCounter, 1023 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 2487 mSolverCounterSat, 608 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1023 SdHoareTripleChecker+Valid, 1472 SdHoareTripleChecker+Invalid, 3095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 608 IncrementalHoareTripleChecker+Valid, 2487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:38:15,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1023 Valid, 1472 Invalid, 3095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [608 Valid, 2487 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-20 07:38:15,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109826 states. [2021-11-20 07:38:16,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109826 to 107454. [2021-11-20 07:38:16,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107454 states, 107453 states have (on average 1.0681507263640848) internal successors, (114776), 107453 states have internal predecessors, (114776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:16,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107454 states to 107454 states and 114776 transitions. [2021-11-20 07:38:16,710 INFO L78 Accepts]: Start accepts. Automaton has 107454 states and 114776 transitions. Word has length 405 [2021-11-20 07:38:16,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:38:16,711 INFO L470 AbstractCegarLoop]: Abstraction has 107454 states and 114776 transitions. [2021-11-20 07:38:16,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:16,712 INFO L276 IsEmpty]: Start isEmpty. Operand 107454 states and 114776 transitions. [2021-11-20 07:38:17,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2021-11-20 07:38:17,032 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:38:17,032 INFO L514 BasicCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-20 07:38:17,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 07:38:17,033 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:38:17,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:38:17,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1634580838, now seen corresponding path program 1 times [2021-11-20 07:38:17,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:38:17,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648732285] [2021-11-20 07:38:17,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:17,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:38:17,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:17,417 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 538 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-20 07:38:17,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:38:17,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648732285] [2021-11-20 07:38:17,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648732285] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:38:17,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:38:17,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:38:17,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181523038] [2021-11-20 07:38:17,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:38:17,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:38:17,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:38:17,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:38:17,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:38:17,421 INFO L87 Difference]: Start difference. First operand 107454 states and 114776 transitions. Second operand has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:22,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:38:22,088 INFO L93 Difference]: Finished difference Result 277223 states and 296834 transitions. [2021-11-20 07:38:22,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:38:22,088 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 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 485 [2021-11-20 07:38:22,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:38:22,242 INFO L225 Difference]: With dead ends: 277223 [2021-11-20 07:38:22,242 INFO L226 Difference]: Without dead ends: 170558 [2021-11-20 07:38:22,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:38:22,281 INFO L933 BasicCegarLoop]: 642 mSDtfsCounter, 845 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 2971 mSolverCounterSat, 610 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 3581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 610 IncrementalHoareTripleChecker+Valid, 2971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:38:22,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [845 Valid, 755 Invalid, 3581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [610 Valid, 2971 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-11-20 07:38:22,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170558 states. [2021-11-20 07:38:24,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170558 to 166515. [2021-11-20 07:38:24,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166515 states, 166514 states have (on average 1.0666550560313246) internal successors, (177613), 166514 states have internal predecessors, (177613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:24,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166515 states to 166515 states and 177613 transitions. [2021-11-20 07:38:24,768 INFO L78 Accepts]: Start accepts. Automaton has 166515 states and 177613 transitions. Word has length 485 [2021-11-20 07:38:24,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:38:24,768 INFO L470 AbstractCegarLoop]: Abstraction has 166515 states and 177613 transitions. [2021-11-20 07:38:24,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:24,768 INFO L276 IsEmpty]: Start isEmpty. Operand 166515 states and 177613 transitions. [2021-11-20 07:38:24,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2021-11-20 07:38:24,784 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:38:24,785 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:38:24,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 07:38:24,785 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:38:24,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:38:24,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1893946046, now seen corresponding path program 1 times [2021-11-20 07:38:24,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:38:24,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324190439] [2021-11-20 07:38:24,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:24,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:38:24,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:25,206 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 265 proven. 113 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 07:38:25,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:38:25,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324190439] [2021-11-20 07:38:25,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324190439] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:38:25,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086674270] [2021-11-20 07:38:25,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:25,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:38:25,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87b7a8b-2d8a-4870-8679-34d4c7d45ba5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:38:25,215 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87b7a8b-2d8a-4870-8679-34d4c7d45ba5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:38:25,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87b7a8b-2d8a-4870-8679-34d4c7d45ba5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 07:38:25,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:25,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 07:38:25,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:38:27,438 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 265 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-20 07:38:27,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:38:27,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086674270] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:38:27,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:38:27,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-11-20 07:38:27,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573402150] [2021-11-20 07:38:27,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:38:27,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:38:27,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:38:27,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:38:27,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:38:27,441 INFO L87 Difference]: Start difference. First operand 166515 states and 177613 transitions. Second operand has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 2 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:31,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:38:31,379 INFO L93 Difference]: Finished difference Result 322808 states and 344824 transitions. [2021-11-20 07:38:31,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:38:31,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 2 states have internal predecessors, (382), 0 states have call successors, (0), 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 507 [2021-11-20 07:38:31,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:38:31,564 INFO L225 Difference]: With dead ends: 322808 [2021-11-20 07:38:31,564 INFO L226 Difference]: Without dead ends: 171249 [2021-11-20 07:38:31,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 506 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:38:31,625 INFO L933 BasicCegarLoop]: 1049 mSDtfsCounter, 682 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 2472 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 1183 SdHoareTripleChecker+Invalid, 2580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 2472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:38:31,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [682 Valid, 1183 Invalid, 2580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 2472 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-20 07:38:31,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171249 states. [2021-11-20 07:38:33,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171249 to 168877. [2021-11-20 07:38:33,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168877 states, 168876 states have (on average 1.0609026741514485) internal successors, (179161), 168876 states have internal predecessors, (179161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:33,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168877 states to 168877 states and 179161 transitions. [2021-11-20 07:38:33,901 INFO L78 Accepts]: Start accepts. Automaton has 168877 states and 179161 transitions. Word has length 507 [2021-11-20 07:38:33,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:38:33,902 INFO L470 AbstractCegarLoop]: Abstraction has 168877 states and 179161 transitions. [2021-11-20 07:38:33,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 2 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:33,902 INFO L276 IsEmpty]: Start isEmpty. Operand 168877 states and 179161 transitions. [2021-11-20 07:38:33,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2021-11-20 07:38:33,930 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:38:33,930 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:38:33,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87b7a8b-2d8a-4870-8679-34d4c7d45ba5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 07:38:34,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87b7a8b-2d8a-4870-8679-34d4c7d45ba5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-20 07:38:34,132 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:38:34,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:38:34,133 INFO L85 PathProgramCache]: Analyzing trace with hash 571328055, now seen corresponding path program 1 times [2021-11-20 07:38:34,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:38:34,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403175887] [2021-11-20 07:38:34,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:34,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:38:34,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:34,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1251 backedges. 481 proven. 0 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2021-11-20 07:38:34,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:38:34,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403175887] [2021-11-20 07:38:34,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403175887] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:38:34,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:38:34,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:38:34,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46286849] [2021-11-20 07:38:34,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:38:34,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:38:34,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:38:34,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:38:34,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:38:34,395 INFO L87 Difference]: Start difference. First operand 168877 states and 179161 transitions. Second operand has 3 states, 3 states have (on average 105.0) internal successors, (315), 2 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:37,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:38:37,555 INFO L93 Difference]: Finished difference Result 317269 states and 337183 transitions. [2021-11-20 07:38:37,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:38:37,556 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 2 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 640 [2021-11-20 07:38:37,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:38:37,740 INFO L225 Difference]: With dead ends: 317269 [2021-11-20 07:38:37,740 INFO L226 Difference]: Without dead ends: 164925 [2021-11-20 07:38:37,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:38:37,800 INFO L933 BasicCegarLoop]: 294 mSDtfsCounter, 1655 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1463 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1655 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:38:37,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1655 Valid, 294 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1463 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 07:38:38,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164925 states. [2021-11-20 07:38:39,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164925 to 164924. [2021-11-20 07:38:40,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164924 states, 164923 states have (on average 1.0603857557769383) internal successors, (174882), 164923 states have internal predecessors, (174882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:40,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164924 states to 164924 states and 174882 transitions. [2021-11-20 07:38:40,185 INFO L78 Accepts]: Start accepts. Automaton has 164924 states and 174882 transitions. Word has length 640 [2021-11-20 07:38:40,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:38:40,185 INFO L470 AbstractCegarLoop]: Abstraction has 164924 states and 174882 transitions. [2021-11-20 07:38:40,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 2 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:40,185 INFO L276 IsEmpty]: Start isEmpty. Operand 164924 states and 174882 transitions. [2021-11-20 07:38:40,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2021-11-20 07:38:40,207 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:38:40,208 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:38:40,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 07:38:40,208 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:38:40,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:38:40,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1084265856, now seen corresponding path program 1 times [2021-11-20 07:38:40,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:38:40,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631160717] [2021-11-20 07:38:40,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:40,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:38:40,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:41,205 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 755 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-11-20 07:38:41,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:38:41,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631160717] [2021-11-20 07:38:41,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631160717] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:38:41,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:38:41,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:38:41,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335022238] [2021-11-20 07:38:41,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:38:41,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:38:41,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:38:41,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:38:41,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:38:41,225 INFO L87 Difference]: Start difference. First operand 164924 states and 174882 transitions. Second operand has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:45,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:38:45,499 INFO L93 Difference]: Finished difference Result 314910 states and 334499 transitions. [2021-11-20 07:38:45,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:38:45,500 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 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 640 [2021-11-20 07:38:45,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:38:45,695 INFO L225 Difference]: With dead ends: 314910 [2021-11-20 07:38:45,695 INFO L226 Difference]: Without dead ends: 164940 [2021-11-20 07:38:45,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:38:45,754 INFO L933 BasicCegarLoop]: 1645 mSDtfsCounter, 765 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2455 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 1782 SdHoareTripleChecker+Invalid, 2629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 2455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:38:45,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [765 Valid, 1782 Invalid, 2629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 2455 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-20 07:38:45,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164940 states. [2021-11-20 07:38:47,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164940 to 162559. [2021-11-20 07:38:47,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162559 states, 162558 states have (on average 1.0573210792455616) internal successors, (171876), 162558 states have internal predecessors, (171876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:48,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162559 states to 162559 states and 171876 transitions. [2021-11-20 07:38:48,174 INFO L78 Accepts]: Start accepts. Automaton has 162559 states and 171876 transitions. Word has length 640 [2021-11-20 07:38:48,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:38:48,175 INFO L470 AbstractCegarLoop]: Abstraction has 162559 states and 171876 transitions. [2021-11-20 07:38:48,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:48,175 INFO L276 IsEmpty]: Start isEmpty. Operand 162559 states and 171876 transitions. [2021-11-20 07:38:48,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 671 [2021-11-20 07:38:48,200 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:38:48,201 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:38:48,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 07:38:48,209 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:38:48,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:38:48,210 INFO L85 PathProgramCache]: Analyzing trace with hash 524904638, now seen corresponding path program 1 times [2021-11-20 07:38:48,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:38:48,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442347004] [2021-11-20 07:38:48,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:48,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:38:48,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:48,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 876 proven. 0 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2021-11-20 07:38:48,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:38:48,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442347004] [2021-11-20 07:38:48,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442347004] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:38:48,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:38:48,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:38:48,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934513072] [2021-11-20 07:38:48,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:38:48,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:38:48,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:38:48,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:38:48,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:38:48,554 INFO L87 Difference]: Start difference. First operand 162559 states and 171876 transitions. Second operand has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)