./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label43.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_af2d5bdc-3eb4-4705-84fa-0e0a8391a929/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af2d5bdc-3eb4-4705-84fa-0e0a8391a929/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_af2d5bdc-3eb4-4705-84fa-0e0a8391a929/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af2d5bdc-3eb4-4705-84fa-0e0a8391a929/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label43.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af2d5bdc-3eb4-4705-84fa-0e0a8391a929/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_af2d5bdc-3eb4-4705-84fa-0e0a8391a929/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 35560e922bf8333807d0348ddb335d0f345175bbe017d76c2c9d638827ad9537 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:18:30,456 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:18:30,459 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:18:30,523 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:18:30,524 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:18:30,530 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:18:30,532 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:18:30,537 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:18:30,540 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:18:30,546 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:18:30,548 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:18:30,550 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:18:30,550 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:18:30,553 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:18:30,556 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:18:30,561 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:18:30,564 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:18:30,565 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:18:30,568 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:18:30,578 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:18:30,581 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:18:30,583 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:18:30,587 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:18:30,588 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:18:30,600 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:18:30,601 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:18:30,601 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:18:30,604 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:18:30,605 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:18:30,607 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:18:30,607 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:18:30,609 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:18:30,611 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:18:30,613 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:18:30,615 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:18:30,616 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:18:30,617 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:18:30,617 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:18:30,618 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:18:30,619 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:18:30,620 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:18:30,621 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af2d5bdc-3eb4-4705-84fa-0e0a8391a929/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:18:30,676 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:18:30,677 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:18:30,678 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:18:30,678 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:18:30,679 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:18:30,679 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:18:30,680 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:18:30,681 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:18:30,681 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:18:30,681 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:18:30,683 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:18:30,683 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:18:30,683 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:18:30,683 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:18:30,684 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:18:30,684 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:18:30,684 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:18:30,685 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:18:30,685 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:18:30,685 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:18:30,685 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:18:30,686 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:18:30,686 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:18:30,686 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:18:30,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:18:30,687 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:18:30,687 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:18:30,688 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:18:30,688 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:18:30,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:18:30,690 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:18:30,691 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:18:30,691 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:18:30,691 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:18:30,692 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_af2d5bdc-3eb4-4705-84fa-0e0a8391a929/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af2d5bdc-3eb4-4705-84fa-0e0a8391a929/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 35560e922bf8333807d0348ddb335d0f345175bbe017d76c2c9d638827ad9537 [2021-11-20 06:18:31,106 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:18:31,148 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:18:31,151 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:18:31,153 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:18:31,154 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:18:31,156 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af2d5bdc-3eb4-4705-84fa-0e0a8391a929/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/eca-rers2012/Problem13_label43.c [2021-11-20 06:18:31,243 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af2d5bdc-3eb4-4705-84fa-0e0a8391a929/bin/uautomizer-DQz5hQGWxF/data/7e09fc841/c58f526efaaa4ee5a0adcb329ea16f33/FLAGd346394e8 [2021-11-20 06:18:32,290 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:18:32,292 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af2d5bdc-3eb4-4705-84fa-0e0a8391a929/sv-benchmarks/c/eca-rers2012/Problem13_label43.c [2021-11-20 06:18:32,350 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af2d5bdc-3eb4-4705-84fa-0e0a8391a929/bin/uautomizer-DQz5hQGWxF/data/7e09fc841/c58f526efaaa4ee5a0adcb329ea16f33/FLAGd346394e8 [2021-11-20 06:18:32,659 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af2d5bdc-3eb4-4705-84fa-0e0a8391a929/bin/uautomizer-DQz5hQGWxF/data/7e09fc841/c58f526efaaa4ee5a0adcb329ea16f33 [2021-11-20 06:18:32,662 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:18:32,664 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:18:32,668 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:18:32,669 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:18:32,674 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:18:32,675 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:18:32" (1/1) ... [2021-11-20 06:18:32,677 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@698452d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:18:32, skipping insertion in model container [2021-11-20 06:18:32,677 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:18:32" (1/1) ... [2021-11-20 06:18:32,686 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:18:32,873 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:18:33,300 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_af2d5bdc-3eb4-4705-84fa-0e0a8391a929/sv-benchmarks/c/eca-rers2012/Problem13_label43.c[2870,2883] [2021-11-20 06:18:34,794 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:18:34,803 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:18:34,838 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_af2d5bdc-3eb4-4705-84fa-0e0a8391a929/sv-benchmarks/c/eca-rers2012/Problem13_label43.c[2870,2883] [2021-11-20 06:18:35,685 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:18:35,723 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:18:35,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:18:35 WrapperNode [2021-11-20 06:18:35,724 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:18:35,726 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:18:35,726 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:18:35,726 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:18:35,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:18:35" (1/1) ... [2021-11-20 06:18:35,882 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:18:35" (1/1) ... [2021-11-20 06:18:36,807 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-11-20 06:18:36,807 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:18:36,809 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:18:36,809 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:18:36,809 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:18:36,824 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:18:35" (1/1) ... [2021-11-20 06:18:36,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:18:35" (1/1) ... [2021-11-20 06:18:37,116 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:18:35" (1/1) ... [2021-11-20 06:18:37,116 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:18:35" (1/1) ... [2021-11-20 06:18:37,549 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:18:35" (1/1) ... [2021-11-20 06:18:37,631 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:18:35" (1/1) ... [2021-11-20 06:18:37,714 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:18:35" (1/1) ... [2021-11-20 06:18:37,786 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:18:37,788 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:18:37,789 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:18:37,789 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:18:37,790 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:18:35" (1/1) ... [2021-11-20 06:18:37,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:18:37,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af2d5bdc-3eb4-4705-84fa-0e0a8391a929/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:18:37,826 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af2d5bdc-3eb4-4705-84fa-0e0a8391a929/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:18:37,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af2d5bdc-3eb4-4705-84fa-0e0a8391a929/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:18:37,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:18:37,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:18:37,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:18:37,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:18:37,939 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:18:37,941 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:18:44,752 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:18:44,794 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:18:44,794 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 06:18:44,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:18:44 BoogieIcfgContainer [2021-11-20 06:18:44,800 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:18:44,803 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:18:44,803 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:18:44,807 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:18:44,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:18:32" (1/3) ... [2021-11-20 06:18:44,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b099da7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:18:44, skipping insertion in model container [2021-11-20 06:18:44,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:18:35" (2/3) ... [2021-11-20 06:18:44,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b099da7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:18:44, skipping insertion in model container [2021-11-20 06:18:44,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:18:44" (3/3) ... [2021-11-20 06:18:44,811 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label43.c [2021-11-20 06:18:44,821 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:18:44,821 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:18:44,904 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:18:44,914 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 06:18:44,914 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:18:44,968 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 06:18:44,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 06:18:44,978 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:18:44,979 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:18:44,979 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:18:44,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:18:44,987 INFO L85 PathProgramCache]: Analyzing trace with hash 567305786, now seen corresponding path program 1 times [2021-11-20 06:18:44,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:18:44,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30721868] [2021-11-20 06:18:44,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:18:45,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:18:45,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:18:45,317 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 06:18:45,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:18:45,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30721868] [2021-11-20 06:18:45,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30721868] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:18:45,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:18:45,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:18:45,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141661843] [2021-11-20 06:18:45,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:18:45,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:18:45,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:18:45,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:18:45,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:18:45,374 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 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 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 06:18:51,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:18:51,713 INFO L93 Difference]: Finished difference Result 3035 states and 5643 transitions. [2021-11-20 06:18:51,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:18:51,716 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2021-11-20 06:18:51,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:18:51,754 INFO L225 Difference]: With dead ends: 3035 [2021-11-20 06:18:51,754 INFO L226 Difference]: Without dead ends: 1873 [2021-11-20 06:18:51,765 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 06:18:51,770 INFO L933 BasicCegarLoop]: 991 mSDtfsCounter, 887 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 2505 mSolverCounterSat, 858 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 887 SdHoareTripleChecker+Valid, 1145 SdHoareTripleChecker+Invalid, 3363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 858 IncrementalHoareTripleChecker+Valid, 2505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:18:51,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [887 Valid, 1145 Invalid, 3363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [858 Valid, 2505 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2021-11-20 06:18:51,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2021-11-20 06:18:51,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1859. [2021-11-20 06:18:51,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1859 states, 1858 states have (on average 1.5441334768568353) internal successors, (2869), 1858 states have internal predecessors, (2869), 0 states have call successors, (0), 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 06:18:51,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 2869 transitions. [2021-11-20 06:18:51,933 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 2869 transitions. Word has length 18 [2021-11-20 06:18:51,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:18:51,934 INFO L470 AbstractCegarLoop]: Abstraction has 1859 states and 2869 transitions. [2021-11-20 06:18:51,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 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 06:18:51,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 2869 transitions. [2021-11-20 06:18:51,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-20 06:18:51,939 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:18:51,940 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:18:51,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:18:51,941 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:18:51,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:18:51,942 INFO L85 PathProgramCache]: Analyzing trace with hash -855264667, now seen corresponding path program 1 times [2021-11-20 06:18:51,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:18:51,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112660165] [2021-11-20 06:18:51,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:18:51,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:18:52,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:18:52,146 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:18:52,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:18:52,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112660165] [2021-11-20 06:18:52,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112660165] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:18:52,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:18:52,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:18:52,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656157731] [2021-11-20 06:18:52,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:18:52,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:18:52,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:18:52,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:18:52,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:18:52,152 INFO L87 Difference]: Start difference. First operand 1859 states and 2869 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 0 states have call successors, (0), 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 06:18:57,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:18:57,884 INFO L93 Difference]: Finished difference Result 5317 states and 8229 transitions. [2021-11-20 06:18:57,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:18:57,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-20 06:18:57,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:18:57,923 INFO L225 Difference]: With dead ends: 5317 [2021-11-20 06:18:57,924 INFO L226 Difference]: Without dead ends: 3460 [2021-11-20 06:18:57,928 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 06:18:57,930 INFO L933 BasicCegarLoop]: 1039 mSDtfsCounter, 826 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 2402 mSolverCounterSat, 877 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 1192 SdHoareTripleChecker+Invalid, 3279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 877 IncrementalHoareTripleChecker+Valid, 2402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:18:57,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [826 Valid, 1192 Invalid, 3279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [877 Valid, 2402 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2021-11-20 06:18:57,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3460 states. [2021-11-20 06:18:58,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3460 to 3459. [2021-11-20 06:18:58,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3459 states, 3458 states have (on average 1.3805668016194332) internal successors, (4774), 3458 states have internal predecessors, (4774), 0 states have call successors, (0), 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 06:18:58,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3459 states to 3459 states and 4774 transitions. [2021-11-20 06:18:58,067 INFO L78 Accepts]: Start accepts. Automaton has 3459 states and 4774 transitions. Word has length 90 [2021-11-20 06:18:58,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:18:58,070 INFO L470 AbstractCegarLoop]: Abstraction has 3459 states and 4774 transitions. [2021-11-20 06:18:58,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 0 states have call successors, (0), 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 06:18:58,071 INFO L276 IsEmpty]: Start isEmpty. Operand 3459 states and 4774 transitions. [2021-11-20 06:18:58,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-20 06:18:58,083 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:18:58,084 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:18:58,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:18:58,088 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:18:58,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:18:58,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1119954532, now seen corresponding path program 1 times [2021-11-20 06:18:58,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:18:58,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648968187] [2021-11-20 06:18:58,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:18:58,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:18:58,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:18:58,400 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:18:58,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:18:58,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648968187] [2021-11-20 06:18:58,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648968187] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:18:58,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:18:58,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:18:58,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059126502] [2021-11-20 06:18:58,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:18:58,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:18:58,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:18:58,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:18:58,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:18:58,404 INFO L87 Difference]: Start difference. First operand 3459 states and 4774 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 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 06:19:04,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:19:04,591 INFO L93 Difference]: Finished difference Result 10870 states and 14768 transitions. [2021-11-20 06:19:04,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:19:04,601 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 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 104 [2021-11-20 06:19:04,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:19:04,654 INFO L225 Difference]: With dead ends: 10870 [2021-11-20 06:19:04,654 INFO L226 Difference]: Without dead ends: 7413 [2021-11-20 06:19:04,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:19:04,669 INFO L933 BasicCegarLoop]: 709 mSDtfsCounter, 2579 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 4117 mSolverCounterSat, 834 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2579 SdHoareTripleChecker+Valid, 1003 SdHoareTripleChecker+Invalid, 4951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 834 IncrementalHoareTripleChecker+Valid, 4117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:19:04,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2579 Valid, 1003 Invalid, 4951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [834 Valid, 4117 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2021-11-20 06:19:04,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7413 states. [2021-11-20 06:19:04,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7413 to 7412. [2021-11-20 06:19:04,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7412 states, 7411 states have (on average 1.2698691134799622) internal successors, (9411), 7411 states have internal predecessors, (9411), 0 states have call successors, (0), 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 06:19:04,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7412 states to 7412 states and 9411 transitions. [2021-11-20 06:19:04,872 INFO L78 Accepts]: Start accepts. Automaton has 7412 states and 9411 transitions. Word has length 104 [2021-11-20 06:19:04,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:19:04,873 INFO L470 AbstractCegarLoop]: Abstraction has 7412 states and 9411 transitions. [2021-11-20 06:19:04,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 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 06:19:04,874 INFO L276 IsEmpty]: Start isEmpty. Operand 7412 states and 9411 transitions. [2021-11-20 06:19:04,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-20 06:19:04,881 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:19:04,881 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 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 06:19:04,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 06:19:04,883 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:19:04,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:19:04,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1862150574, now seen corresponding path program 1 times [2021-11-20 06:19:04,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:19:04,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741313004] [2021-11-20 06:19:04,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:19:04,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:19:04,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:05,119 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-20 06:19:05,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:19:05,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741313004] [2021-11-20 06:19:05,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741313004] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:19:05,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:19:05,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:19:05,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111240631] [2021-11-20 06:19:05,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:19:05,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:19:05,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:19:05,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:19:05,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:19:05,124 INFO L87 Difference]: Start difference. First operand 7412 states and 9411 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 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 06:19:09,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:19:09,910 INFO L93 Difference]: Finished difference Result 20357 states and 26252 transitions. [2021-11-20 06:19:09,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:19:09,917 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 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 185 [2021-11-20 06:19:09,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:19:09,986 INFO L225 Difference]: With dead ends: 20357 [2021-11-20 06:19:09,987 INFO L226 Difference]: Without dead ends: 13734 [2021-11-20 06:19:09,998 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 06:19:10,000 INFO L933 BasicCegarLoop]: 851 mSDtfsCounter, 889 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2576 mSolverCounterSat, 747 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 980 SdHoareTripleChecker+Invalid, 3323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 747 IncrementalHoareTripleChecker+Valid, 2576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:19:10,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [889 Valid, 980 Invalid, 3323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [747 Valid, 2576 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-11-20 06:19:10,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13734 states. [2021-11-20 06:19:10,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13734 to 12937. [2021-11-20 06:19:10,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12937 states, 12936 states have (on average 1.215213358070501) internal successors, (15720), 12936 states have internal predecessors, (15720), 0 states have call successors, (0), 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 06:19:10,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12937 states to 12937 states and 15720 transitions. [2021-11-20 06:19:10,489 INFO L78 Accepts]: Start accepts. Automaton has 12937 states and 15720 transitions. Word has length 185 [2021-11-20 06:19:10,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:19:10,491 INFO L470 AbstractCegarLoop]: Abstraction has 12937 states and 15720 transitions. [2021-11-20 06:19:10,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 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 06:19:10,493 INFO L276 IsEmpty]: Start isEmpty. Operand 12937 states and 15720 transitions. [2021-11-20 06:19:10,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-11-20 06:19:10,498 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:19:10,498 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:19:10,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 06:19:10,499 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:19:10,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:19:10,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1257624322, now seen corresponding path program 1 times [2021-11-20 06:19:10,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:19:10,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126005350] [2021-11-20 06:19:10,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:19:10,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:19:10,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:10,721 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:19:10,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:19:10,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126005350] [2021-11-20 06:19:10,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126005350] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:19:10,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:19:10,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:19:10,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028767028] [2021-11-20 06:19:10,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:19:10,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:19:10,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:19:10,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:19:10,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:19:10,729 INFO L87 Difference]: Start difference. First operand 12937 states and 15720 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 06:19:15,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:19:15,133 INFO L93 Difference]: Finished difference Result 31392 states and 39119 transitions. [2021-11-20 06:19:15,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:19:15,134 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 217 [2021-11-20 06:19:15,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:19:15,181 INFO L225 Difference]: With dead ends: 31392 [2021-11-20 06:19:15,182 INFO L226 Difference]: Without dead ends: 19244 [2021-11-20 06:19:15,199 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 06:19:15,200 INFO L933 BasicCegarLoop]: 808 mSDtfsCounter, 860 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 2381 mSolverCounterSat, 914 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 3295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 914 IncrementalHoareTripleChecker+Valid, 2381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:19:15,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [860 Valid, 924 Invalid, 3295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [914 Valid, 2381 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-20 06:19:15,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19244 states. [2021-11-20 06:19:15,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19244 to 19235. [2021-11-20 06:19:15,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19235 states, 19234 states have (on average 1.1956431319538317) internal successors, (22997), 19234 states have internal predecessors, (22997), 0 states have call successors, (0), 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 06:19:15,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19235 states to 19235 states and 22997 transitions. [2021-11-20 06:19:15,547 INFO L78 Accepts]: Start accepts. Automaton has 19235 states and 22997 transitions. Word has length 217 [2021-11-20 06:19:15,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:19:15,549 INFO L470 AbstractCegarLoop]: Abstraction has 19235 states and 22997 transitions. [2021-11-20 06:19:15,554 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 06:19:15,554 INFO L276 IsEmpty]: Start isEmpty. Operand 19235 states and 22997 transitions. [2021-11-20 06:19:15,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2021-11-20 06:19:15,562 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:19:15,563 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 06:19:15,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 06:19:15,564 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:19:15,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:19:15,565 INFO L85 PathProgramCache]: Analyzing trace with hash 669304523, now seen corresponding path program 1 times [2021-11-20 06:19:15,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:19:15,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161976011] [2021-11-20 06:19:15,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:19:15,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:19:15,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:15,804 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 293 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 06:19:15,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:19:15,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161976011] [2021-11-20 06:19:15,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161976011] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:19:15,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:19:15,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:19:15,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869384707] [2021-11-20 06:19:15,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:19:15,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:19:15,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:19:15,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:19:15,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:19:15,809 INFO L87 Difference]: Start difference. First operand 19235 states and 22997 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 06:19:24,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:19:24,448 INFO L93 Difference]: Finished difference Result 71737 states and 86317 transitions. [2021-11-20 06:19:24,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:19:24,449 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 301 [2021-11-20 06:19:24,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:19:24,556 INFO L225 Difference]: With dead ends: 71737 [2021-11-20 06:19:24,556 INFO L226 Difference]: Without dead ends: 53291 [2021-11-20 06:19:24,578 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 06:19:24,579 INFO L933 BasicCegarLoop]: 488 mSDtfsCounter, 1737 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 6063 mSolverCounterSat, 1189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1737 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 7252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1189 IncrementalHoareTripleChecker+Valid, 6063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:19:24,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1737 Valid, 689 Invalid, 7252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1189 Valid, 6063 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2021-11-20 06:19:24,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53291 states. [2021-11-20 06:19:25,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53291 to 50023. [2021-11-20 06:19:25,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50023 states, 50022 states have (on average 1.176662268601815) internal successors, (58859), 50022 states have internal predecessors, (58859), 0 states have call successors, (0), 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 06:19:25,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50023 states to 50023 states and 58859 transitions. [2021-11-20 06:19:25,595 INFO L78 Accepts]: Start accepts. Automaton has 50023 states and 58859 transitions. Word has length 301 [2021-11-20 06:19:25,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:19:25,596 INFO L470 AbstractCegarLoop]: Abstraction has 50023 states and 58859 transitions. [2021-11-20 06:19:25,596 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 06:19:25,596 INFO L276 IsEmpty]: Start isEmpty. Operand 50023 states and 58859 transitions. [2021-11-20 06:19:25,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2021-11-20 06:19:25,607 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:19:25,608 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:19:25,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 06:19:25,608 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:19:25,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:19:25,610 INFO L85 PathProgramCache]: Analyzing trace with hash 143314799, now seen corresponding path program 1 times [2021-11-20 06:19:25,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:19:25,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143624926] [2021-11-20 06:19:25,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:19:25,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:19:25,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:25,992 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 238 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-20 06:19:25,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:19:25,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143624926] [2021-11-20 06:19:25,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143624926] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:19:25,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:19:25,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:19:25,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418784747] [2021-11-20 06:19:25,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:19:25,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:19:25,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:19:25,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:19:25,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:19:25,995 INFO L87 Difference]: Start difference. First operand 50023 states and 58859 transitions. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 2 states have internal predecessors, (235), 0 states have call successors, (0), 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 06:19:30,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:19:30,132 INFO L93 Difference]: Finished difference Result 110298 states and 129457 transitions. [2021-11-20 06:19:30,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:19:30,133 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 2 states have internal predecessors, (235), 0 states have call successors, (0), 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 344 [2021-11-20 06:19:30,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:19:30,229 INFO L225 Difference]: With dead ends: 110298 [2021-11-20 06:19:30,229 INFO L226 Difference]: Without dead ends: 61064 [2021-11-20 06:19:30,265 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 06:19:30,269 INFO L933 BasicCegarLoop]: 1021 mSDtfsCounter, 730 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 2706 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 1202 SdHoareTripleChecker+Invalid, 2886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 2706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:19:30,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [730 Valid, 1202 Invalid, 2886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 2706 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-11-20 06:19:30,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61064 states. [2021-11-20 06:19:31,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61064 to 61054. [2021-11-20 06:19:31,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61054 states, 61053 states have (on average 1.157387843349221) internal successors, (70662), 61053 states have internal predecessors, (70662), 0 states have call successors, (0), 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 06:19:31,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61054 states to 61054 states and 70662 transitions. [2021-11-20 06:19:31,288 INFO L78 Accepts]: Start accepts. Automaton has 61054 states and 70662 transitions. Word has length 344 [2021-11-20 06:19:31,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:19:31,289 INFO L470 AbstractCegarLoop]: Abstraction has 61054 states and 70662 transitions. [2021-11-20 06:19:31,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 2 states have internal predecessors, (235), 0 states have call successors, (0), 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 06:19:31,517 INFO L276 IsEmpty]: Start isEmpty. Operand 61054 states and 70662 transitions. [2021-11-20 06:19:31,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2021-11-20 06:19:31,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:19:31,537 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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 06:19:31,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 06:19:31,537 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:19:31,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:19:31,549 INFO L85 PathProgramCache]: Analyzing trace with hash -709045718, now seen corresponding path program 1 times [2021-11-20 06:19:31,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:19:31,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811686996] [2021-11-20 06:19:31,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:19:31,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:19:31,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:31,800 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2021-11-20 06:19:31,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:19:31,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811686996] [2021-11-20 06:19:31,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811686996] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:19:31,801 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:19:31,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:19:31,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585292335] [2021-11-20 06:19:31,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:19:31,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:19:31,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:19:31,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:19:31,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:19:31,803 INFO L87 Difference]: Start difference. First operand 61054 states and 70662 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 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 06:19:36,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:19:36,936 INFO L93 Difference]: Finished difference Result 147482 states and 173541 transitions. [2021-11-20 06:19:36,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:19:36,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 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 347 [2021-11-20 06:19:36,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:19:37,067 INFO L225 Difference]: With dead ends: 147482 [2021-11-20 06:19:37,067 INFO L226 Difference]: Without dead ends: 98248 [2021-11-20 06:19:37,094 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 06:19:37,095 INFO L933 BasicCegarLoop]: 644 mSDtfsCounter, 1016 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 3028 mSolverCounterSat, 736 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1016 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 3764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 736 IncrementalHoareTripleChecker+Valid, 3028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:19:37,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1016 Valid, 730 Invalid, 3764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [736 Valid, 3028 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-11-20 06:19:37,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98248 states. [2021-11-20 06:19:38,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98248 to 76070. [2021-11-20 06:19:38,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76070 states, 76069 states have (on average 1.1683734504200134) internal successors, (88877), 76069 states have internal predecessors, (88877), 0 states have call successors, (0), 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 06:19:38,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76070 states to 76070 states and 88877 transitions. [2021-11-20 06:19:38,282 INFO L78 Accepts]: Start accepts. Automaton has 76070 states and 88877 transitions. Word has length 347 [2021-11-20 06:19:38,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:19:38,283 INFO L470 AbstractCegarLoop]: Abstraction has 76070 states and 88877 transitions. [2021-11-20 06:19:38,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 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 06:19:38,283 INFO L276 IsEmpty]: Start isEmpty. Operand 76070 states and 88877 transitions. [2021-11-20 06:19:38,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-11-20 06:19:38,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:19:38,297 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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 06:19:38,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 06:19:38,297 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:19:38,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:19:38,298 INFO L85 PathProgramCache]: Analyzing trace with hash 651711769, now seen corresponding path program 1 times [2021-11-20 06:19:38,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:19:38,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587492337] [2021-11-20 06:19:38,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:19:38,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:19:38,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:38,696 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 254 proven. 113 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 06:19:38,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:19:38,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587492337] [2021-11-20 06:19:38,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587492337] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:19:38,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859605512] [2021-11-20 06:19:38,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:19:38,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:19:38,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af2d5bdc-3eb4-4705-84fa-0e0a8391a929/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:19:38,704 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af2d5bdc-3eb4-4705-84fa-0e0a8391a929/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:19:38,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af2d5bdc-3eb4-4705-84fa-0e0a8391a929/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:19:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:39,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:19:39,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:19:39,851 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2021-11-20 06:19:39,851 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:19:39,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859605512] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:19:39,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:19:39,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-11-20 06:19:39,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434482581] [2021-11-20 06:19:39,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:19:39,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:19:39,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:19:39,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:19:39,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:19:39,855 INFO L87 Difference]: Start difference. First operand 76070 states and 88877 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:19:43,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:19:43,749 INFO L93 Difference]: Finished difference Result 156052 states and 182968 transitions. [2021-11-20 06:19:43,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:19:43,750 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 373 [2021-11-20 06:19:43,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:19:43,870 INFO L225 Difference]: With dead ends: 156052 [2021-11-20 06:19:43,871 INFO L226 Difference]: Without dead ends: 91802 [2021-11-20 06:19:43,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 372 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 06:19:43,896 INFO L933 BasicCegarLoop]: 1741 mSDtfsCounter, 900 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 2398 mSolverCounterSat, 464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 900 SdHoareTripleChecker+Valid, 1871 SdHoareTripleChecker+Invalid, 2862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 464 IncrementalHoareTripleChecker+Valid, 2398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:19:43,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [900 Valid, 1871 Invalid, 2862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [464 Valid, 2398 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-20 06:19:43,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91802 states. [2021-11-20 06:19:45,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91802 to 83138. [2021-11-20 06:19:45,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83138 states, 83137 states have (on average 1.159171006892238) internal successors, (96370), 83137 states have internal predecessors, (96370), 0 states have call successors, (0), 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 06:19:45,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83138 states to 83138 states and 96370 transitions. [2021-11-20 06:19:45,176 INFO L78 Accepts]: Start accepts. Automaton has 83138 states and 96370 transitions. Word has length 373 [2021-11-20 06:19:45,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:19:45,177 INFO L470 AbstractCegarLoop]: Abstraction has 83138 states and 96370 transitions. [2021-11-20 06:19:45,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:19:45,177 INFO L276 IsEmpty]: Start isEmpty. Operand 83138 states and 96370 transitions. [2021-11-20 06:19:45,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2021-11-20 06:19:45,186 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:19:45,186 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:19:45,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af2d5bdc-3eb4-4705-84fa-0e0a8391a929/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-20 06:19:45,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af2d5bdc-3eb4-4705-84fa-0e0a8391a929/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-20 06:19:45,413 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:19:45,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:19:45,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1045689510, now seen corresponding path program 1 times [2021-11-20 06:19:45,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:19:45,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592318817] [2021-11-20 06:19:45,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:19:45,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:19:45,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:45,616 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 392 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-11-20 06:19:45,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:19:45,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592318817] [2021-11-20 06:19:45,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592318817] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:19:45,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:19:45,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:19:45,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420064375] [2021-11-20 06:19:45,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:19:45,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:19:45,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:19:45,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:19:45,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:19:45,619 INFO L87 Difference]: Start difference. First operand 83138 states and 96370 transitions. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 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 06:19:49,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:19:49,554 INFO L93 Difference]: Finished difference Result 167857 states and 194340 transitions. [2021-11-20 06:19:49,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:19:49,555 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 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 417 [2021-11-20 06:19:49,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:19:49,645 INFO L225 Difference]: With dead ends: 167857 [2021-11-20 06:19:49,645 INFO L226 Difference]: Without dead ends: 85508 [2021-11-20 06:19:49,682 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 06:19:49,683 INFO L933 BasicCegarLoop]: 1379 mSDtfsCounter, 900 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 2481 mSolverCounterSat, 626 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 900 SdHoareTripleChecker+Valid, 1470 SdHoareTripleChecker+Invalid, 3107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 626 IncrementalHoareTripleChecker+Valid, 2481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:19:49,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [900 Valid, 1470 Invalid, 3107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [626 Valid, 2481 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-20 06:19:49,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85508 states. [2021-11-20 06:19:50,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85508 to 83130. [2021-11-20 06:19:50,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83130 states, 83129 states have (on average 1.1257443250851087) internal successors, (93582), 83129 states have internal predecessors, (93582), 0 states have call successors, (0), 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 06:19:50,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83130 states to 83130 states and 93582 transitions. [2021-11-20 06:19:50,768 INFO L78 Accepts]: Start accepts. Automaton has 83130 states and 93582 transitions. Word has length 417 [2021-11-20 06:19:50,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:19:50,769 INFO L470 AbstractCegarLoop]: Abstraction has 83130 states and 93582 transitions. [2021-11-20 06:19:50,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 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 06:19:50,770 INFO L276 IsEmpty]: Start isEmpty. Operand 83130 states and 93582 transitions. [2021-11-20 06:19:50,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-11-20 06:19:50,781 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:19:50,782 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:19:50,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 06:19:50,783 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:19:50,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:19:50,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1410029894, now seen corresponding path program 1 times [2021-11-20 06:19:50,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:19:50,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10017747] [2021-11-20 06:19:50,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:19:50,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:19:50,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:51,277 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 397 proven. 113 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-20 06:19:51,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:19:51,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10017747] [2021-11-20 06:19:51,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10017747] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:19:51,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918923924] [2021-11-20 06:19:51,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:19:51,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:19:51,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af2d5bdc-3eb4-4705-84fa-0e0a8391a929/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:19:51,279 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af2d5bdc-3eb4-4705-84fa-0e0a8391a929/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:19:51,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af2d5bdc-3eb4-4705-84fa-0e0a8391a929/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:19:51,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:51,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:19:51,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:19:52,791 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 429 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-11-20 06:19:52,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:19:52,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918923924] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:19:52,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:19:52,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-11-20 06:19:52,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697697962] [2021-11-20 06:19:52,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:19:52,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:19:52,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:19:52,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:19:52,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:19:52,794 INFO L87 Difference]: Start difference. First operand 83130 states and 93582 transitions. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 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 06:19:56,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:19:56,386 INFO L93 Difference]: Finished difference Result 165470 states and 186370 transitions. [2021-11-20 06:19:56,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:19:56,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 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 443 [2021-11-20 06:19:56,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:19:56,476 INFO L225 Difference]: With dead ends: 165470 [2021-11-20 06:19:56,476 INFO L226 Difference]: Without dead ends: 83129 [2021-11-20 06:19:56,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 442 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 06:19:56,508 INFO L933 BasicCegarLoop]: 1353 mSDtfsCounter, 1103 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2461 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1103 SdHoareTripleChecker+Valid, 1435 SdHoareTripleChecker+Invalid, 2909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 2461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:19:56,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1103 Valid, 1435 Invalid, 2909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 2461 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-20 06:19:56,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83129 states. [2021-11-20 06:19:57,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83129 to 82340. [2021-11-20 06:19:57,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82340 states, 82339 states have (on average 1.0993696790099468) internal successors, (90521), 82339 states have internal predecessors, (90521), 0 states have call successors, (0), 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 06:19:57,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82340 states to 82340 states and 90521 transitions. [2021-11-20 06:19:57,460 INFO L78 Accepts]: Start accepts. Automaton has 82340 states and 90521 transitions. Word has length 443 [2021-11-20 06:19:57,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:19:57,460 INFO L470 AbstractCegarLoop]: Abstraction has 82340 states and 90521 transitions. [2021-11-20 06:19:57,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 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 06:19:57,461 INFO L276 IsEmpty]: Start isEmpty. Operand 82340 states and 90521 transitions. [2021-11-20 06:19:57,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2021-11-20 06:19:57,474 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:19:57,474 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:19:57,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af2d5bdc-3eb4-4705-84fa-0e0a8391a929/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-20 06:19:57,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af2d5bdc-3eb4-4705-84fa-0e0a8391a929/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 06:19:57,688 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:19:57,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:19:57,689 INFO L85 PathProgramCache]: Analyzing trace with hash 2001880031, now seen corresponding path program 1 times [2021-11-20 06:19:57,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:19:57,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418540615] [2021-11-20 06:19:57,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:19:57,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:19:57,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:57,919 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 407 proven. 0 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2021-11-20 06:19:57,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:19:57,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418540615] [2021-11-20 06:19:57,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418540615] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:19:57,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:19:57,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:19:57,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528992212] [2021-11-20 06:19:57,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:19:57,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:19:57,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:19:57,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:19:57,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:19:57,922 INFO L87 Difference]: Start difference. First operand 82340 states and 90521 transitions. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 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 06:20:01,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:20:01,931 INFO L93 Difference]: Finished difference Result 164653 states and 180876 transitions. [2021-11-20 06:20:01,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:20:01,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 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 488 [2021-11-20 06:20:01,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:20:02,056 INFO L225 Difference]: With dead ends: 164653 [2021-11-20 06:20:02,056 INFO L226 Difference]: Without dead ends: 83102 [2021-11-20 06:20:02,388 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 06:20:02,389 INFO L933 BasicCegarLoop]: 1490 mSDtfsCounter, 976 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 2346 mSolverCounterSat, 590 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 1618 SdHoareTripleChecker+Invalid, 2936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 590 IncrementalHoareTripleChecker+Valid, 2346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:20:02,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [976 Valid, 1618 Invalid, 2936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [590 Valid, 2346 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-20 06:20:02,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83102 states. [2021-11-20 06:20:03,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83102 to 79156. [2021-11-20 06:20:03,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79156 states, 79155 states have (on average 1.0711389046806898) internal successors, (84786), 79155 states have internal predecessors, (84786), 0 states have call successors, (0), 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 06:20:03,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79156 states to 79156 states and 84786 transitions. [2021-11-20 06:20:03,416 INFO L78 Accepts]: Start accepts. Automaton has 79156 states and 84786 transitions. Word has length 488 [2021-11-20 06:20:03,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:20:03,417 INFO L470 AbstractCegarLoop]: Abstraction has 79156 states and 84786 transitions. [2021-11-20 06:20:03,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 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 06:20:03,417 INFO L276 IsEmpty]: Start isEmpty. Operand 79156 states and 84786 transitions. [2021-11-20 06:20:03,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2021-11-20 06:20:03,429 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:20:03,429 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2021-11-20 06:20:03,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 06:20:03,430 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:20:03,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:20:03,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1100417008, now seen corresponding path program 1 times [2021-11-20 06:20:03,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:20:03,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8267214] [2021-11-20 06:20:03,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:20:03,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:20:03,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:03,641 INFO L134 CoverageAnalysis]: Checked inductivity of 971 backedges. 683 proven. 0 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-11-20 06:20:03,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:20:03,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8267214] [2021-11-20 06:20:03,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8267214] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:20:03,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:20:03,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:20:03,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223293212] [2021-11-20 06:20:03,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:20:03,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:20:03,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:20:03,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:20:03,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:20:03,644 INFO L87 Difference]: Start difference. First operand 79156 states and 84786 transitions. Second operand has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 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 06:20:07,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:20:07,512 INFO L93 Difference]: Finished difference Result 186662 states and 200609 transitions. [2021-11-20 06:20:07,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:20:07,513 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 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 552 [2021-11-20 06:20:07,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:20:07,665 INFO L225 Difference]: With dead ends: 186662 [2021-11-20 06:20:07,665 INFO L226 Difference]: Without dead ends: 105144 [2021-11-20 06:20:07,702 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 06:20:07,705 INFO L933 BasicCegarLoop]: 1731 mSDtfsCounter, 784 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2515 mSolverCounterSat, 462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 784 SdHoareTripleChecker+Valid, 1873 SdHoareTripleChecker+Invalid, 2977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 462 IncrementalHoareTripleChecker+Valid, 2515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:20:07,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [784 Valid, 1873 Invalid, 2977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [462 Valid, 2515 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-20 06:20:07,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105144 states. [2021-11-20 06:20:08,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105144 to 105123. [2021-11-20 06:20:09,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105123 states, 105122 states have (on average 1.0610814101710393) internal successors, (111543), 105122 states have internal predecessors, (111543), 0 states have call successors, (0), 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 06:20:09,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105123 states to 105123 states and 111543 transitions. [2021-11-20 06:20:09,162 INFO L78 Accepts]: Start accepts. Automaton has 105123 states and 111543 transitions. Word has length 552 [2021-11-20 06:20:09,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:20:09,162 INFO L470 AbstractCegarLoop]: Abstraction has 105123 states and 111543 transitions. [2021-11-20 06:20:09,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 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 06:20:09,163 INFO L276 IsEmpty]: Start isEmpty. Operand 105123 states and 111543 transitions. [2021-11-20 06:20:09,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 562 [2021-11-20 06:20:09,181 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:20:09,181 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 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, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:20:09,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 06:20:09,182 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:20:09,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:20:09,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1835777825, now seen corresponding path program 1 times [2021-11-20 06:20:09,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:20:09,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253085662] [2021-11-20 06:20:09,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:20:09,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:20:09,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:09,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1222 backedges. 880 proven. 0 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2021-11-20 06:20:09,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:20:09,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253085662] [2021-11-20 06:20:09,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253085662] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:20:09,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:20:09,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:20:09,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66938551] [2021-11-20 06:20:09,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:20:09,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:20:09,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:20:09,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:20:09,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:20:09,908 INFO L87 Difference]: Start difference. First operand 105123 states and 111543 transitions. Second operand has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 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 06:20:14,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:20:14,544 INFO L93 Difference]: Finished difference Result 234670 states and 250703 transitions. [2021-11-20 06:20:14,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:20:14,544 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 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 561 [2021-11-20 06:20:14,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:20:14,688 INFO L225 Difference]: With dead ends: 234670 [2021-11-20 06:20:14,688 INFO L226 Difference]: Without dead ends: 142939 [2021-11-20 06:20:14,712 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 06:20:14,712 INFO L933 BasicCegarLoop]: 617 mSDtfsCounter, 1008 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 2463 mSolverCounterSat, 945 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1008 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 3408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 945 IncrementalHoareTripleChecker+Valid, 2463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:20:14,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1008 Valid, 697 Invalid, 3408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [945 Valid, 2463 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-11-20 06:20:14,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142939 states. [2021-11-20 06:20:16,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142939 to 142935. [2021-11-20 06:20:16,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142935 states, 142934 states have (on average 1.0635188268711433) internal successors, (152013), 142934 states have internal predecessors, (152013), 0 states have call successors, (0), 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 06:20:16,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142935 states to 142935 states and 152013 transitions. [2021-11-20 06:20:16,817 INFO L78 Accepts]: Start accepts. Automaton has 142935 states and 152013 transitions. Word has length 561 [2021-11-20 06:20:16,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:20:16,817 INFO L470 AbstractCegarLoop]: Abstraction has 142935 states and 152013 transitions. [2021-11-20 06:20:16,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 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 06:20:16,818 INFO L276 IsEmpty]: Start isEmpty. Operand 142935 states and 152013 transitions. [2021-11-20 06:20:16,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2021-11-20 06:20:16,841 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:20:16,842 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:20:16,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 06:20:16,842 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:20:16,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:20:16,842 INFO L85 PathProgramCache]: Analyzing trace with hash -821332607, now seen corresponding path program 1 times [2021-11-20 06:20:16,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:20:16,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607068606] [2021-11-20 06:20:16,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:20:16,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:20:16,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:17,063 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 476 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-20 06:20:17,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:20:17,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607068606] [2021-11-20 06:20:17,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607068606] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:20:17,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:20:17,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:20:17,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877814488] [2021-11-20 06:20:17,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:20:17,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:20:17,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:20:17,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:20:17,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:20:17,067 INFO L87 Difference]: Start difference. First operand 142935 states and 152013 transitions. Second operand has 3 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 0 states have call successors, (0), 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 06:20:21,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:20:21,661 INFO L93 Difference]: Finished difference Result 317350 states and 338639 transitions. [2021-11-20 06:20:21,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:20:21,662 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 0 states have call successors, (0), 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 594 [2021-11-20 06:20:21,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:20:21,845 INFO L225 Difference]: With dead ends: 317350 [2021-11-20 06:20:21,845 INFO L226 Difference]: Without dead ends: 175204 [2021-11-20 06:20:21,891 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 06:20:21,896 INFO L933 BasicCegarLoop]: 696 mSDtfsCounter, 930 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 2367 mSolverCounterSat, 793 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 3160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 793 IncrementalHoareTripleChecker+Valid, 2367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:20:21,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [930 Valid, 776 Invalid, 3160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [793 Valid, 2367 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-20 06:20:22,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175204 states. [2021-11-20 06:20:24,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175204 to 172034. [2021-11-20 06:20:24,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172034 states, 172033 states have (on average 1.06079066225666) internal successors, (182491), 172033 states have internal predecessors, (182491), 0 states have call successors, (0), 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 06:20:24,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172034 states to 172034 states and 182491 transitions. [2021-11-20 06:20:24,322 INFO L78 Accepts]: Start accepts. Automaton has 172034 states and 182491 transitions. Word has length 594 [2021-11-20 06:20:24,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:20:24,322 INFO L470 AbstractCegarLoop]: Abstraction has 172034 states and 182491 transitions. [2021-11-20 06:20:24,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 0 states have call successors, (0), 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 06:20:24,323 INFO L276 IsEmpty]: Start isEmpty. Operand 172034 states and 182491 transitions. [2021-11-20 06:20:24,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 602 [2021-11-20 06:20:24,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:20:24,341 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:20:24,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 06:20:24,342 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:20:24,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:20:24,342 INFO L85 PathProgramCache]: Analyzing trace with hash 73241686, now seen corresponding path program 1 times [2021-11-20 06:20:24,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:20:24,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786737487] [2021-11-20 06:20:24,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:20:24,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:20:24,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:24,718 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 269 proven. 113 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 06:20:24,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:20:24,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786737487] [2021-11-20 06:20:24,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786737487] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:20:24,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101962783] [2021-11-20 06:20:24,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:20:24,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:20:24,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af2d5bdc-3eb4-4705-84fa-0e0a8391a929/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:20:24,720 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af2d5bdc-3eb4-4705-84fa-0e0a8391a929/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:20:24,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af2d5bdc-3eb4-4705-84fa-0e0a8391a929/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:20:24,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:24,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:20:24,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:20:26,529 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 285 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-20 06:20:26,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:20:26,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101962783] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:20:26,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:20:26,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-11-20 06:20:26,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819250405] [2021-11-20 06:20:26,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:20:26,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:20:26,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:20:26,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:20:26,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:20:26,541 INFO L87 Difference]: Start difference. First operand 172034 states and 182491 transitions. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 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 06:20:31,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:20:31,323 INFO L93 Difference]: Finished difference Result 331426 states and 352144 transitions. [2021-11-20 06:20:31,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:20:31,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 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 601 [2021-11-20 06:20:31,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:20:31,592 INFO L225 Difference]: With dead ends: 331426 [2021-11-20 06:20:31,592 INFO L226 Difference]: Without dead ends: 175928 [2021-11-20 06:20:31,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 600 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:20:31,673 INFO L933 BasicCegarLoop]: 351 mSDtfsCounter, 973 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 2252 mSolverCounterSat, 737 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 973 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 2989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 737 IncrementalHoareTripleChecker+Valid, 2252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:20:31,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [973 Valid, 363 Invalid, 2989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [737 Valid, 2252 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-20 06:20:31,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175928 states.