./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem17_label52.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem17_label52.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa --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 673e4a4bf325c025d58fd334f1e832326bf41b68123ee166ef18eb1ee4097cb0 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 19:36:12,725 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 19:36:12,726 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 19:36:12,758 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 19:36:12,758 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 19:36:12,759 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 19:36:12,761 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 19:36:12,763 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 19:36:12,766 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 19:36:12,767 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 19:36:12,768 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 19:36:12,769 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 19:36:12,770 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 19:36:12,771 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 19:36:12,772 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 19:36:12,773 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 19:36:12,774 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 19:36:12,774 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 19:36:12,776 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 19:36:12,778 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 19:36:12,779 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 19:36:12,780 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 19:36:12,782 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 19:36:12,782 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 19:36:12,785 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 19:36:12,785 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 19:36:12,786 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 19:36:12,786 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 19:36:12,787 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 19:36:12,788 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 19:36:12,788 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 19:36:12,789 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 19:36:12,789 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 19:36:12,790 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 19:36:12,791 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 19:36:12,791 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 19:36:12,792 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 19:36:12,792 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 19:36:12,792 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 19:36:12,793 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 19:36:12,793 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 19:36:12,794 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 19:36:12,818 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 19:36:12,819 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 19:36:12,819 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 19:36:12,819 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 19:36:12,820 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 19:36:12,820 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 19:36:12,821 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 19:36:12,821 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 19:36:12,821 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 19:36:12,821 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 19:36:12,822 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 19:36:12,822 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 19:36:12,822 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 19:36:12,822 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 19:36:12,822 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 19:36:12,823 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 19:36:12,823 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 19:36:12,823 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 19:36:12,823 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 19:36:12,823 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 19:36:12,824 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 19:36:12,824 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 19:36:12,824 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 19:36:12,824 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 19:36:12,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:36:12,825 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 19:36:12,825 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 19:36:12,825 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 19:36:12,825 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 19:36:12,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 19:36:12,826 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 19:36:12,826 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 19:36:12,826 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 19:36:12,826 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 19:36:12,826 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_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 673e4a4bf325c025d58fd334f1e832326bf41b68123ee166ef18eb1ee4097cb0 [2021-12-06 19:36:13,007 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 19:36:13,021 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 19:36:13,023 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 19:36:13,024 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 19:36:13,024 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 19:36:13,025 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/eca-rers2012/Problem17_label52.c [2021-12-06 19:36:13,068 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/data/0abc4c661/5475bddbdb914e3ea3be33a22141862b/FLAG4d766f096 [2021-12-06 19:36:13,576 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 19:36:13,577 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/sv-benchmarks/c/eca-rers2012/Problem17_label52.c [2021-12-06 19:36:13,594 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/data/0abc4c661/5475bddbdb914e3ea3be33a22141862b/FLAG4d766f096 [2021-12-06 19:36:14,100 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/data/0abc4c661/5475bddbdb914e3ea3be33a22141862b [2021-12-06 19:36:14,103 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 19:36:14,104 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 19:36:14,105 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 19:36:14,105 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 19:36:14,108 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 19:36:14,109 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:36:14" (1/1) ... [2021-12-06 19:36:14,110 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fb79e23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:36:14, skipping insertion in model container [2021-12-06 19:36:14,110 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:36:14" (1/1) ... [2021-12-06 19:36:14,117 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 19:36:14,182 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 19:36:14,325 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_b8a4ee58-94d2-4d9c-b790-9a5359365310/sv-benchmarks/c/eca-rers2012/Problem17_label52.c[1111,1124] [2021-12-06 19:36:14,763 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:36:14,770 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 19:36:14,779 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_b8a4ee58-94d2-4d9c-b790-9a5359365310/sv-benchmarks/c/eca-rers2012/Problem17_label52.c[1111,1124] [2021-12-06 19:36:15,034 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:36:15,047 INFO L208 MainTranslator]: Completed translation [2021-12-06 19:36:15,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:36:15 WrapperNode [2021-12-06 19:36:15,048 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 19:36:15,048 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 19:36:15,048 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 19:36:15,048 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 19:36:15,054 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:36:15" (1/1) ... [2021-12-06 19:36:15,085 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:36:15" (1/1) ... [2021-12-06 19:36:15,271 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-12-06 19:36:15,271 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 19:36:15,272 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 19:36:15,272 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 19:36:15,272 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 19:36:15,279 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:36:15" (1/1) ... [2021-12-06 19:36:15,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:36:15" (1/1) ... [2021-12-06 19:36:15,317 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:36:15" (1/1) ... [2021-12-06 19:36:15,317 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:36:15" (1/1) ... [2021-12-06 19:36:15,406 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:36:15" (1/1) ... [2021-12-06 19:36:15,418 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:36:15" (1/1) ... [2021-12-06 19:36:15,455 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:36:15" (1/1) ... [2021-12-06 19:36:15,499 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 19:36:15,499 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 19:36:15,500 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 19:36:15,500 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 19:36:15,501 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:36:15" (1/1) ... [2021-12-06 19:36:15,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:36:15,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:36:15,525 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 19:36:15,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 19:36:15,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 19:36:15,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 19:36:15,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 19:36:15,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 19:36:15,643 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 19:36:15,645 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 19:36:18,174 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 19:36:18,186 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 19:36:18,186 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 19:36:18,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:36:18 BoogieIcfgContainer [2021-12-06 19:36:18,188 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 19:36:18,190 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 19:36:18,190 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 19:36:18,192 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 19:36:18,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 07:36:14" (1/3) ... [2021-12-06 19:36:18,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ba2cb3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:36:18, skipping insertion in model container [2021-12-06 19:36:18,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:36:15" (2/3) ... [2021-12-06 19:36:18,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ba2cb3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:36:18, skipping insertion in model container [2021-12-06 19:36:18,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:36:18" (3/3) ... [2021-12-06 19:36:18,194 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label52.c [2021-12-06 19:36:18,198 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 19:36:18,198 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 19:36:18,236 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 19:36:18,241 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 [2021-12-06 19:36:18,241 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 19:36:18,262 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:36:18,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-06 19:36:18,266 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:36:18,266 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-06 19:36:18,266 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:36:18,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:36:18,270 INFO L85 PathProgramCache]: Analyzing trace with hash 889694410, now seen corresponding path program 1 times [2021-12-06 19:36:18,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:36:18,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762110158] [2021-12-06 19:36:18,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:36:18,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:36:18,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:18,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:36:18,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:36:18,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762110158] [2021-12-06 19:36:18,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762110158] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:36:18,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:36:18,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:36:18,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510641649] [2021-12-06 19:36:18,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:36:18,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:36:18,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:36:18,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:36:18,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:36:18,415 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 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 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:36:20,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:36:20,614 INFO L93 Difference]: Finished difference Result 1644 states and 3029 transitions. [2021-12-06 19:36:20,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:36:20,616 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-12-06 19:36:20,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:36:20,631 INFO L225 Difference]: With dead ends: 1644 [2021-12-06 19:36:20,631 INFO L226 Difference]: Without dead ends: 977 [2021-12-06 19:36:20,635 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 [2021-12-06 19:36:20,638 INFO L933 BasicCegarLoop]: 425 mSDtfsCounter, 482 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 1802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:36:20,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 503 Invalid, 1802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-06 19:36:20,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-12-06 19:36:20,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 971. [2021-12-06 19:36:20,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 1.5536082474226804) internal successors, (1507), 970 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:36:20,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1507 transitions. [2021-12-06 19:36:20,704 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1507 transitions. Word has length 6 [2021-12-06 19:36:20,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:36:20,704 INFO L470 AbstractCegarLoop]: Abstraction has 971 states and 1507 transitions. [2021-12-06 19:36:20,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:36:20,704 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1507 transitions. [2021-12-06 19:36:20,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-06 19:36:20,706 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:36:20,706 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:36:20,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 19:36:20,707 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:36:20,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:36:20,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1474699842, now seen corresponding path program 1 times [2021-12-06 19:36:20,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:36:20,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717846361] [2021-12-06 19:36:20,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:36:20,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:36:20,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:20,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:36:20,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:36:20,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717846361] [2021-12-06 19:36:20,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717846361] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:36:20,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:36:20,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:36:20,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37304796] [2021-12-06 19:36:20,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:36:20,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:36:20,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:36:20,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:36:20,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:36:20,836 INFO L87 Difference]: Start difference. First operand 971 states and 1507 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:36:22,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:36:22,894 INFO L93 Difference]: Finished difference Result 2815 states and 4382 transitions. [2021-12-06 19:36:22,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:36:22,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2021-12-06 19:36:22,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:36:22,902 INFO L225 Difference]: With dead ends: 2815 [2021-12-06 19:36:22,902 INFO L226 Difference]: Without dead ends: 1846 [2021-12-06 19:36:22,904 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 [2021-12-06 19:36:22,905 INFO L933 BasicCegarLoop]: 507 mSDtfsCounter, 407 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1382 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 1706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 1382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:36:22,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 580 Invalid, 1706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 1382 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-06 19:36:22,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1846 states. [2021-12-06 19:36:22,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1846 to 1841. [2021-12-06 19:36:22,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 1.3505434782608696) internal successors, (2485), 1840 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:36:22,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2485 transitions. [2021-12-06 19:36:22,951 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2485 transitions. Word has length 73 [2021-12-06 19:36:22,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:36:22,951 INFO L470 AbstractCegarLoop]: Abstraction has 1841 states and 2485 transitions. [2021-12-06 19:36:22,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:36:22,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2485 transitions. [2021-12-06 19:36:22,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-06 19:36:22,954 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:36:22,954 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 19:36:22,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 19:36:22,954 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:36:22,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:36:22,955 INFO L85 PathProgramCache]: Analyzing trace with hash 947435030, now seen corresponding path program 1 times [2021-12-06 19:36:22,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:36:22,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116254617] [2021-12-06 19:36:22,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:36:22,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:36:22,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:23,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:36:23,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:36:23,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116254617] [2021-12-06 19:36:23,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116254617] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:36:23,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:36:23,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:36:23,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631470331] [2021-12-06 19:36:23,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:36:23,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:36:23,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:36:23,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:36:23,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:36:23,030 INFO L87 Difference]: Start difference. First operand 1841 states and 2485 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:36:24,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:36:24,935 INFO L93 Difference]: Finished difference Result 4552 states and 6285 transitions. [2021-12-06 19:36:24,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:36:24,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-12-06 19:36:24,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:36:24,946 INFO L225 Difference]: With dead ends: 4552 [2021-12-06 19:36:24,946 INFO L226 Difference]: Without dead ends: 2713 [2021-12-06 19:36:24,948 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 [2021-12-06 19:36:24,949 INFO L933 BasicCegarLoop]: 818 mSDtfsCounter, 501 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1264 mSolverCounterSat, 415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 415 IncrementalHoareTripleChecker+Valid, 1264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-06 19:36:24,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [501 Valid, 886 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [415 Valid, 1264 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-06 19:36:24,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2021-12-06 19:36:24,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2711. [2021-12-06 19:36:24,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2711 states, 2710 states have (on average 1.3007380073800738) internal successors, (3525), 2710 states have internal predecessors, (3525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:36:24,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2711 states to 2711 states and 3525 transitions. [2021-12-06 19:36:24,991 INFO L78 Accepts]: Start accepts. Automaton has 2711 states and 3525 transitions. Word has length 76 [2021-12-06 19:36:24,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:36:24,991 INFO L470 AbstractCegarLoop]: Abstraction has 2711 states and 3525 transitions. [2021-12-06 19:36:24,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:36:24,992 INFO L276 IsEmpty]: Start isEmpty. Operand 2711 states and 3525 transitions. [2021-12-06 19:36:24,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-06 19:36:24,994 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:36:24,994 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:36:24,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 19:36:24,994 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:36:24,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:36:24,995 INFO L85 PathProgramCache]: Analyzing trace with hash 264646321, now seen corresponding path program 1 times [2021-12-06 19:36:24,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:36:24,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989854262] [2021-12-06 19:36:24,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:36:24,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:36:25,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:25,096 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-06 19:36:25,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:36:25,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989854262] [2021-12-06 19:36:25,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989854262] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:36:25,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:36:25,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:36:25,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94681816] [2021-12-06 19:36:25,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:36:25,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:36:25,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:36:25,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:36:25,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:36:25,098 INFO L87 Difference]: Start difference. First operand 2711 states and 3525 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:36:26,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:36:26,783 INFO L93 Difference]: Finished difference Result 7984 states and 10364 transitions. [2021-12-06 19:36:26,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:36:26,784 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 0 states have call successors, (0), 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 145 [2021-12-06 19:36:26,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:36:26,800 INFO L225 Difference]: With dead ends: 7984 [2021-12-06 19:36:26,800 INFO L226 Difference]: Without dead ends: 4421 [2021-12-06 19:36:26,803 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 [2021-12-06 19:36:26,804 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 386 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 19:36:26,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 19:36:26,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4421 states. [2021-12-06 19:36:26,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4421 to 3566. [2021-12-06 19:36:26,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3566 states, 3565 states have (on average 1.1778401122019635) internal successors, (4199), 3565 states have internal predecessors, (4199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:36:26,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3566 states to 3566 states and 4199 transitions. [2021-12-06 19:36:26,862 INFO L78 Accepts]: Start accepts. Automaton has 3566 states and 4199 transitions. Word has length 145 [2021-12-06 19:36:26,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:36:26,862 INFO L470 AbstractCegarLoop]: Abstraction has 3566 states and 4199 transitions. [2021-12-06 19:36:26,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:36:26,863 INFO L276 IsEmpty]: Start isEmpty. Operand 3566 states and 4199 transitions. [2021-12-06 19:36:26,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-12-06 19:36:26,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:36:26,865 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:36:26,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 19:36:26,865 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:36:26,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:36:26,866 INFO L85 PathProgramCache]: Analyzing trace with hash 779228845, now seen corresponding path program 1 times [2021-12-06 19:36:26,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:36:26,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684998439] [2021-12-06 19:36:26,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:36:26,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:36:26,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:26,982 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:36:26,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:36:26,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684998439] [2021-12-06 19:36:26,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684998439] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:36:26,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:36:26,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:36:26,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798303194] [2021-12-06 19:36:26,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:36:26,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:36:26,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:36:26,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:36:26,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:36:26,984 INFO L87 Difference]: Start difference. First operand 3566 states and 4199 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:36:28,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:36:28,611 INFO L93 Difference]: Finished difference Result 9263 states and 11078 transitions. [2021-12-06 19:36:28,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:36:28,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 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 158 [2021-12-06 19:36:28,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:36:28,630 INFO L225 Difference]: With dead ends: 9263 [2021-12-06 19:36:28,631 INFO L226 Difference]: Without dead ends: 5699 [2021-12-06 19:36:28,634 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 [2021-12-06 19:36:28,635 INFO L933 BasicCegarLoop]: 726 mSDtfsCounter, 496 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 19:36:28,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 784 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 19:36:28,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5699 states. [2021-12-06 19:36:28,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5699 to 5699. [2021-12-06 19:36:28,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5699 states, 5698 states have (on average 1.1597051597051597) internal successors, (6608), 5698 states have internal predecessors, (6608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:36:28,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5699 states to 5699 states and 6608 transitions. [2021-12-06 19:36:28,707 INFO L78 Accepts]: Start accepts. Automaton has 5699 states and 6608 transitions. Word has length 158 [2021-12-06 19:36:28,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:36:28,707 INFO L470 AbstractCegarLoop]: Abstraction has 5699 states and 6608 transitions. [2021-12-06 19:36:28,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:36:28,707 INFO L276 IsEmpty]: Start isEmpty. Operand 5699 states and 6608 transitions. [2021-12-06 19:36:28,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-06 19:36:28,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:36:28,709 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:36:28,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 19:36:28,709 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:36:28,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:36:28,710 INFO L85 PathProgramCache]: Analyzing trace with hash -897468184, now seen corresponding path program 1 times [2021-12-06 19:36:28,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:36:28,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519711804] [2021-12-06 19:36:28,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:36:28,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:36:28,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:28,811 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 7 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:36:28,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:36:28,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519711804] [2021-12-06 19:36:28,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519711804] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:36:28,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150553120] [2021-12-06 19:36:28,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:36:28,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:36:28,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:36:28,813 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:36:28,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 19:36:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:28,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 19:36:28,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:36:29,345 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 7 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:36:29,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:36:29,599 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:36:29,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150553120] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 19:36:29,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:36:29,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2021-12-06 19:36:29,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648727784] [2021-12-06 19:36:29,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:36:29,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:36:29,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:36:29,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:36:29,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:36:29,602 INFO L87 Difference]: Start difference. First operand 5699 states and 6608 transitions. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:36:32,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:36:32,355 INFO L93 Difference]: Finished difference Result 16961 states and 19953 transitions. [2021-12-06 19:36:32,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:36:32,355 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 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 160 [2021-12-06 19:36:32,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:36:32,389 INFO L225 Difference]: With dead ends: 16961 [2021-12-06 19:36:32,389 INFO L226 Difference]: Without dead ends: 10384 [2021-12-06 19:36:32,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 315 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:36:32,394 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 883 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2205 mSolverCounterSat, 631 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 883 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 2836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 631 IncrementalHoareTripleChecker+Valid, 2205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-06 19:36:32,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [883 Valid, 166 Invalid, 2836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [631 Valid, 2205 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-06 19:36:32,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10384 states. [2021-12-06 19:36:32,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10384 to 10379. [2021-12-06 19:36:32,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10379 states, 10378 states have (on average 1.1553285796878012) internal successors, (11990), 10378 states have internal predecessors, (11990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:36:32,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10379 states to 10379 states and 11990 transitions. [2021-12-06 19:36:32,507 INFO L78 Accepts]: Start accepts. Automaton has 10379 states and 11990 transitions. Word has length 160 [2021-12-06 19:36:32,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:36:32,507 INFO L470 AbstractCegarLoop]: Abstraction has 10379 states and 11990 transitions. [2021-12-06 19:36:32,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:36:32,507 INFO L276 IsEmpty]: Start isEmpty. Operand 10379 states and 11990 transitions. [2021-12-06 19:36:32,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-12-06 19:36:32,510 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:36:32,510 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:36:32,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 19:36:32,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:36:32,712 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:36:32,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:36:32,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1619681626, now seen corresponding path program 1 times [2021-12-06 19:36:32,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:36:32,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357759283] [2021-12-06 19:36:32,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:36:32,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:36:32,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:32,851 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 11 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:36:32,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:36:32,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357759283] [2021-12-06 19:36:32,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357759283] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:36:32,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927569227] [2021-12-06 19:36:32,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:36:32,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:36:32,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:36:32,853 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:36:32,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 19:36:32,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:32,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 19:36:32,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:36:33,353 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 148 proven. 73 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 19:36:33,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:36:33,618 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 221 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 19:36:33,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927569227] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 19:36:33,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:36:33,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 6 [2021-12-06 19:36:33,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826804654] [2021-12-06 19:36:33,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:36:33,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:36:33,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:36:33,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:36:33,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:36:33,620 INFO L87 Difference]: Start difference. First operand 10379 states and 11990 transitions. Second operand has 4 states, 4 states have (on average 57.75) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:36:36,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:36:36,161 INFO L93 Difference]: Finished difference Result 28865 states and 33388 transitions. [2021-12-06 19:36:36,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:36:36,162 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.75) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 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 234 [2021-12-06 19:36:36,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:36:36,191 INFO L225 Difference]: With dead ends: 28865 [2021-12-06 19:36:36,191 INFO L226 Difference]: Without dead ends: 18488 [2021-12-06 19:36:36,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 463 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:36:36,200 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 840 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 2268 mSolverCounterSat, 513 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 2781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 513 IncrementalHoareTripleChecker+Valid, 2268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:36:36,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [840 Valid, 186 Invalid, 2781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [513 Valid, 2268 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-06 19:36:36,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18488 states. [2021-12-06 19:36:36,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18488 to 18482. [2021-12-06 19:36:36,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18482 states, 18481 states have (on average 1.1429035225366593) internal successors, (21122), 18481 states have internal predecessors, (21122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:36:36,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18482 states to 18482 states and 21122 transitions. [2021-12-06 19:36:36,419 INFO L78 Accepts]: Start accepts. Automaton has 18482 states and 21122 transitions. Word has length 234 [2021-12-06 19:36:36,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:36:36,420 INFO L470 AbstractCegarLoop]: Abstraction has 18482 states and 21122 transitions. [2021-12-06 19:36:36,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.75) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:36:36,420 INFO L276 IsEmpty]: Start isEmpty. Operand 18482 states and 21122 transitions. [2021-12-06 19:36:36,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-12-06 19:36:36,428 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:36:36,428 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 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] [2021-12-06 19:36:36,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 19:36:36,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:36:36,630 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:36:36,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:36:36,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1408190996, now seen corresponding path program 1 times [2021-12-06 19:36:36,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:36:36,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538979013] [2021-12-06 19:36:36,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:36:36,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:36:36,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:36,787 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 370 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-06 19:36:36,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:36:36,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538979013] [2021-12-06 19:36:36,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538979013] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:36:36,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:36:36,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:36:36,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338261782] [2021-12-06 19:36:36,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:36:36,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:36:36,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:36:36,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:36:36,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:36:36,789 INFO L87 Difference]: Start difference. First operand 18482 states and 21122 transitions. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:36:38,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:36:38,611 INFO L93 Difference]: Finished difference Result 50636 states and 57339 transitions. [2021-12-06 19:36:38,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:36:38,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 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 339 [2021-12-06 19:36:38,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:36:38,662 INFO L225 Difference]: With dead ends: 50636 [2021-12-06 19:36:38,662 INFO L226 Difference]: Without dead ends: 32156 [2021-12-06 19:36:38,677 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 [2021-12-06 19:36:38,678 INFO L933 BasicCegarLoop]: 625 mSDtfsCounter, 426 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1297 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 1297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 19:36:38,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 669 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 1297 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-06 19:36:38,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32156 states. [2021-12-06 19:36:38,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32156 to 29570. [2021-12-06 19:36:38,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29570 states, 29569 states have (on average 1.131117048260002) internal successors, (33446), 29569 states have internal predecessors, (33446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:36:38,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29570 states to 29570 states and 33446 transitions. [2021-12-06 19:36:38,989 INFO L78 Accepts]: Start accepts. Automaton has 29570 states and 33446 transitions. Word has length 339 [2021-12-06 19:36:38,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:36:38,990 INFO L470 AbstractCegarLoop]: Abstraction has 29570 states and 33446 transitions. [2021-12-06 19:36:38,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:36:38,991 INFO L276 IsEmpty]: Start isEmpty. Operand 29570 states and 33446 transitions. [2021-12-06 19:36:38,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2021-12-06 19:36:38,995 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:36:38,995 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:36:38,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 19:36:38,995 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:36:38,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:36:38,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1854618359, now seen corresponding path program 1 times [2021-12-06 19:36:38,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:36:38,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496399985] [2021-12-06 19:36:38,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:36:38,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:36:39,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:39,091 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 387 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-06 19:36:39,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:36:39,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496399985] [2021-12-06 19:36:39,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496399985] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:36:39,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:36:39,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:36:39,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583442241] [2021-12-06 19:36:39,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:36:39,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:36:39,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:36:39,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:36:39,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:36:39,093 INFO L87 Difference]: Start difference. First operand 29570 states and 33446 transitions. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:36:40,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:36:40,949 INFO L93 Difference]: Finished difference Result 68519 states and 77907 transitions. [2021-12-06 19:36:40,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:36:40,949 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 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 340 [2021-12-06 19:36:40,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:36:40,998 INFO L225 Difference]: With dead ends: 68519 [2021-12-06 19:36:40,998 INFO L226 Difference]: Without dead ends: 38950 [2021-12-06 19:36:41,012 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 [2021-12-06 19:36:41,012 INFO L933 BasicCegarLoop]: 603 mSDtfsCounter, 436 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 19:36:41,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 641 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 1173 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-06 19:36:41,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38950 states. [2021-12-06 19:36:41,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38950 to 36818. [2021-12-06 19:36:41,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36818 states, 36817 states have (on average 1.1341228236955754) internal successors, (41755), 36817 states have internal predecessors, (41755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:36:41,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36818 states to 36818 states and 41755 transitions. [2021-12-06 19:36:41,457 INFO L78 Accepts]: Start accepts. Automaton has 36818 states and 41755 transitions. Word has length 340 [2021-12-06 19:36:41,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:36:41,457 INFO L470 AbstractCegarLoop]: Abstraction has 36818 states and 41755 transitions. [2021-12-06 19:36:41,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:36:41,457 INFO L276 IsEmpty]: Start isEmpty. Operand 36818 states and 41755 transitions. [2021-12-06 19:36:41,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2021-12-06 19:36:41,460 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:36:41,461 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-06 19:36:41,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 19:36:41,461 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:36:41,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:36:41,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1750024832, now seen corresponding path program 1 times [2021-12-06 19:36:41,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:36:41,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357448837] [2021-12-06 19:36:41,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:36:41,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:36:41,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:41,581 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 462 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 19:36:41,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:36:41,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357448837] [2021-12-06 19:36:41,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357448837] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:36:41,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:36:41,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:36:41,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629934362] [2021-12-06 19:36:41,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:36:41,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:36:41,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:36:41,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:36:41,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:36:41,583 INFO L87 Difference]: Start difference. First operand 36818 states and 41755 transitions. Second operand has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:36:44,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:36:44,187 INFO L93 Difference]: Finished difference Result 99668 states and 112882 transitions. [2021-12-06 19:36:44,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:36:44,187 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 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 [2021-12-06 19:36:44,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:36:44,251 INFO L225 Difference]: With dead ends: 99668 [2021-12-06 19:36:44,251 INFO L226 Difference]: Without dead ends: 62852 [2021-12-06 19:36:44,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:36:44,270 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 818 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 2328 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 2739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 2328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:36:44,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [818 Valid, 199 Invalid, 2739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 2328 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-06 19:36:44,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62852 states. [2021-12-06 19:36:44,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62852 to 57736. [2021-12-06 19:36:44,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57736 states, 57735 states have (on average 1.1359660517883432) internal successors, (65585), 57735 states have internal predecessors, (65585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:36:44,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57736 states to 57736 states and 65585 transitions. [2021-12-06 19:36:44,950 INFO L78 Accepts]: Start accepts. Automaton has 57736 states and 65585 transitions. Word has length 344 [2021-12-06 19:36:44,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:36:44,951 INFO L470 AbstractCegarLoop]: Abstraction has 57736 states and 65585 transitions. [2021-12-06 19:36:44,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:36:44,951 INFO L276 IsEmpty]: Start isEmpty. Operand 57736 states and 65585 transitions. [2021-12-06 19:36:44,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2021-12-06 19:36:44,999 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:36:44,999 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:36:44,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 19:36:44,999 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:36:45,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:36:45,000 INFO L85 PathProgramCache]: Analyzing trace with hash 832714336, now seen corresponding path program 1 times [2021-12-06 19:36:45,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:36:45,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399097895] [2021-12-06 19:36:45,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:36:45,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:36:45,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:45,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:36:45,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:36:45,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399097895] [2021-12-06 19:36:45,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399097895] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:36:45,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:36:45,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:36:45,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481852007] [2021-12-06 19:36:45,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:36:45,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:36:45,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:36:45,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:36:45,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:36:45,122 INFO L87 Difference]: Start difference. First operand 57736 states and 65585 transitions. Second operand has 4 states, 4 states have (on average 86.25) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:36:48,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:36:48,167 INFO L93 Difference]: Finished difference Result 138523 states and 157087 transitions. [2021-12-06 19:36:48,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:36:48,168 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 86.25) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 345 [2021-12-06 19:36:48,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:36:48,247 INFO L225 Difference]: With dead ends: 138523 [2021-12-06 19:36:48,247 INFO L226 Difference]: Without dead ends: 79087 [2021-12-06 19:36:48,277 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 [2021-12-06 19:36:48,277 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 569 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 2425 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 2600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 2425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-06 19:36:48,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [569 Valid, 356 Invalid, 2600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 2425 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-06 19:36:48,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79087 states. [2021-12-06 19:36:49,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79087 to 77772. [2021-12-06 19:36:49,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77772 states, 77771 states have (on average 1.1287626493165832) internal successors, (87785), 77771 states have internal predecessors, (87785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:36:49,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77772 states to 77772 states and 87785 transitions. [2021-12-06 19:36:49,175 INFO L78 Accepts]: Start accepts. Automaton has 77772 states and 87785 transitions. Word has length 345 [2021-12-06 19:36:49,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:36:49,176 INFO L470 AbstractCegarLoop]: Abstraction has 77772 states and 87785 transitions. [2021-12-06 19:36:49,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 86.25) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:36:49,176 INFO L276 IsEmpty]: Start isEmpty. Operand 77772 states and 87785 transitions. [2021-12-06 19:36:49,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2021-12-06 19:36:49,179 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:36:49,180 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:36:49,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 19:36:49,180 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:36:49,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:36:49,180 INFO L85 PathProgramCache]: Analyzing trace with hash -733442298, now seen corresponding path program 1 times [2021-12-06 19:36:49,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:36:49,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384584505] [2021-12-06 19:36:49,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:36:49,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:36:49,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:49,287 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 223 proven. 4 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-12-06 19:36:49,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:36:49,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384584505] [2021-12-06 19:36:49,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384584505] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:36:49,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652852673] [2021-12-06 19:36:49,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:36:49,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:36:49,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:36:49,288 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:36:49,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 19:36:49,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:49,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 19:36:49,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:36:49,926 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 223 proven. 4 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-12-06 19:36:49,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:36:50,166 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-12-06 19:36:50,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652852673] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 19:36:50,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:36:50,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2021-12-06 19:36:50,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777996783] [2021-12-06 19:36:50,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:36:50,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:36:50,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:36:50,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:36:50,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:36:50,168 INFO L87 Difference]: Start difference. First operand 77772 states and 87785 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:36:52,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:36:52,418 INFO L93 Difference]: Finished difference Result 157649 states and 177844 transitions. [2021-12-06 19:36:52,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:36:52,418 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 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 359 [2021-12-06 19:36:52,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:36:52,491 INFO L225 Difference]: With dead ends: 157649 [2021-12-06 19:36:52,492 INFO L226 Difference]: Without dead ends: 79872 [2021-12-06 19:36:52,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 720 GetRequests, 715 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:36:52,519 INFO L933 BasicCegarLoop]: 665 mSDtfsCounter, 485 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1254 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 1254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-06 19:36:52,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 709 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 1254 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-06 19:36:52,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79872 states. [2021-12-06 19:36:53,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79872 to 79406. [2021-12-06 19:36:53,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79406 states, 79405 states have (on average 1.1147031043385178) internal successors, (88513), 79405 states have internal predecessors, (88513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:36:53,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79406 states to 79406 states and 88513 transitions. [2021-12-06 19:36:53,442 INFO L78 Accepts]: Start accepts. Automaton has 79406 states and 88513 transitions. Word has length 359 [2021-12-06 19:36:53,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:36:53,443 INFO L470 AbstractCegarLoop]: Abstraction has 79406 states and 88513 transitions. [2021-12-06 19:36:53,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:36:53,443 INFO L276 IsEmpty]: Start isEmpty. Operand 79406 states and 88513 transitions. [2021-12-06 19:36:53,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2021-12-06 19:36:53,459 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:36:53,459 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:36:53,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 19:36:53,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 19:36:53,661 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:36:53,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:36:53,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1724265697, now seen corresponding path program 1 times [2021-12-06 19:36:53,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:36:53,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989789812] [2021-12-06 19:36:53,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:36:53,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:36:53,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:53,852 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2021-12-06 19:36:53,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:36:53,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989789812] [2021-12-06 19:36:53,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989789812] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:36:53,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:36:53,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:36:53,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180148614] [2021-12-06 19:36:53,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:36:53,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:36:53,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:36:53,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:36:53,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:36:53,853 INFO L87 Difference]: Start difference. First operand 79406 states and 88513 transitions. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:36:56,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:36:56,300 INFO L93 Difference]: Finished difference Result 169039 states and 187933 transitions. [2021-12-06 19:36:56,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:36:56,301 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 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 572 [2021-12-06 19:36:56,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:36:56,387 INFO L225 Difference]: With dead ends: 169039 [2021-12-06 19:36:56,388 INFO L226 Difference]: Without dead ends: 88360 [2021-12-06 19:36:56,423 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 [2021-12-06 19:36:56,423 INFO L933 BasicCegarLoop]: 759 mSDtfsCounter, 444 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1276 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:36:56,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 814 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1276 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-06 19:36:56,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88360 states. [2021-12-06 19:36:57,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88360 to 87487. [2021-12-06 19:36:57,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87487 states, 87486 states have (on average 1.1064170267242759) internal successors, (96796), 87486 states have internal predecessors, (96796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:36:57,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87487 states to 87487 states and 96796 transitions. [2021-12-06 19:36:57,508 INFO L78 Accepts]: Start accepts. Automaton has 87487 states and 96796 transitions. Word has length 572 [2021-12-06 19:36:57,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:36:57,509 INFO L470 AbstractCegarLoop]: Abstraction has 87487 states and 96796 transitions. [2021-12-06 19:36:57,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:36:57,509 INFO L276 IsEmpty]: Start isEmpty. Operand 87487 states and 96796 transitions. [2021-12-06 19:36:57,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 584 [2021-12-06 19:36:57,528 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:36:57,529 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 19:36:57,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 19:36:57,529 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:36:57,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:36:57,529 INFO L85 PathProgramCache]: Analyzing trace with hash -684506661, now seen corresponding path program 1 times [2021-12-06 19:36:57,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:36:57,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180722876] [2021-12-06 19:36:57,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:36:57,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:36:57,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:57,666 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 346 proven. 0 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2021-12-06 19:36:57,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:36:57,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180722876] [2021-12-06 19:36:57,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180722876] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:36:57,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:36:57,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:36:57,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919434038] [2021-12-06 19:36:57,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:36:57,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:36:57,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:36:57,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:36:57,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:36:57,667 INFO L87 Difference]: Start difference. First operand 87487 states and 96796 transitions. Second operand has 3 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:36:59,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:36:59,806 INFO L93 Difference]: Finished difference Result 183052 states and 202757 transitions. [2021-12-06 19:36:59,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:36:59,807 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 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 583 [2021-12-06 19:36:59,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:36:59,886 INFO L225 Difference]: With dead ends: 183052 [2021-12-06 19:36:59,887 INFO L226 Difference]: Without dead ends: 95992 [2021-12-06 19:36:59,910 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 [2021-12-06 19:36:59,910 INFO L933 BasicCegarLoop]: 635 mSDtfsCounter, 497 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1140 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 19:36:59,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [497 Valid, 682 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1140 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-06 19:36:59,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95992 states. [2021-12-06 19:37:00,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95992 to 95563. [2021-12-06 19:37:00,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95563 states, 95562 states have (on average 1.1002804462024653) internal successors, (105145), 95562 states have internal predecessors, (105145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:37:00,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95563 states to 95563 states and 105145 transitions. [2021-12-06 19:37:00,934 INFO L78 Accepts]: Start accepts. Automaton has 95563 states and 105145 transitions. Word has length 583 [2021-12-06 19:37:00,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:37:00,934 INFO L470 AbstractCegarLoop]: Abstraction has 95563 states and 105145 transitions. [2021-12-06 19:37:00,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:37:00,935 INFO L276 IsEmpty]: Start isEmpty. Operand 95563 states and 105145 transitions. [2021-12-06 19:37:00,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 598 [2021-12-06 19:37:00,955 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:37:00,956 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:37:00,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 19:37:00,956 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:37:00,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:37:00,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1739826372, now seen corresponding path program 1 times [2021-12-06 19:37:00,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:37:00,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380353570] [2021-12-06 19:37:00,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:00,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:37:01,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:01,207 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2021-12-06 19:37:01,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:37:01,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380353570] [2021-12-06 19:37:01,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380353570] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:37:01,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:37:01,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:37:01,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215741061] [2021-12-06 19:37:01,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:37:01,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:37:01,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:37:01,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:37:01,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:37:01,209 INFO L87 Difference]: Start difference. First operand 95563 states and 105145 transitions. Second operand has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:37:02,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:37:02,864 INFO L93 Difference]: Finished difference Result 190696 states and 209858 transitions. [2021-12-06 19:37:02,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:37:02,865 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 597 [2021-12-06 19:37:02,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:37:02,949 INFO L225 Difference]: With dead ends: 190696 [2021-12-06 19:37:02,949 INFO L226 Difference]: Without dead ends: 95560 [2021-12-06 19:37:02,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:37:02,992 INFO L933 BasicCegarLoop]: 534 mSDtfsCounter, 625 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 1170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:37:02,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [625 Valid, 549 Invalid, 1170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-06 19:37:03,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95560 states. [2021-12-06 19:37:04,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95560 to 95133. [2021-12-06 19:37:04,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95133 states, 95132 states have (on average 1.1003027372492957) internal successors, (104674), 95132 states have internal predecessors, (104674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:37:04,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95133 states to 95133 states and 104674 transitions. [2021-12-06 19:37:04,200 INFO L78 Accepts]: Start accepts. Automaton has 95133 states and 104674 transitions. Word has length 597 [2021-12-06 19:37:04,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:37:04,200 INFO L470 AbstractCegarLoop]: Abstraction has 95133 states and 104674 transitions. [2021-12-06 19:37:04,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:37:04,201 INFO L276 IsEmpty]: Start isEmpty. Operand 95133 states and 104674 transitions. [2021-12-06 19:37:04,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 603 [2021-12-06 19:37:04,218 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:37:04,219 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:37:04,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 19:37:04,219 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:37:04,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:37:04,219 INFO L85 PathProgramCache]: Analyzing trace with hash -912761049, now seen corresponding path program 1 times [2021-12-06 19:37:04,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:37:04,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301977187] [2021-12-06 19:37:04,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:04,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:37:04,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:04,406 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-06 19:37:04,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:37:04,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301977187] [2021-12-06 19:37:04,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301977187] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:37:04,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:37:04,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:37:04,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856431409] [2021-12-06 19:37:04,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:37:04,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:37:04,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:37:04,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:37:04,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:37:04,408 INFO L87 Difference]: Start difference. First operand 95133 states and 104674 transitions. Second operand has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:37:06,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:37:06,264 INFO L93 Difference]: Finished difference Result 201342 states and 221866 transitions. [2021-12-06 19:37:06,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:37:06,265 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 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 602 [2021-12-06 19:37:06,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:37:06,376 INFO L225 Difference]: With dead ends: 201342 [2021-12-06 19:37:06,377 INFO L226 Difference]: Without dead ends: 106636 [2021-12-06 19:37:06,424 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 [2021-12-06 19:37:06,425 INFO L933 BasicCegarLoop]: 703 mSDtfsCounter, 104 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1214 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:37:06,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 762 Invalid, 1334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1214 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-06 19:37:06,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106636 states. [2021-12-06 19:37:07,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106636 to 102800. [2021-12-06 19:37:07,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102800 states, 102799 states have (on average 1.0987071858675668) internal successors, (112946), 102799 states have internal predecessors, (112946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:37:07,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102800 states to 102800 states and 112946 transitions. [2021-12-06 19:37:07,782 INFO L78 Accepts]: Start accepts. Automaton has 102800 states and 112946 transitions. Word has length 602 [2021-12-06 19:37:07,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:37:07,782 INFO L470 AbstractCegarLoop]: Abstraction has 102800 states and 112946 transitions. [2021-12-06 19:37:07,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:37:07,783 INFO L276 IsEmpty]: Start isEmpty. Operand 102800 states and 112946 transitions. [2021-12-06 19:37:07,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 631 [2021-12-06 19:37:07,798 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:37:07,799 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:37:07,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 19:37:07,799 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:37:07,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:37:07,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1639907003, now seen corresponding path program 1 times [2021-12-06 19:37:07,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:37:07,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935211669] [2021-12-06 19:37:07,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:07,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:37:07,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:07,975 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 269 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-06 19:37:07,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:37:07,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935211669] [2021-12-06 19:37:07,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935211669] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:37:07,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:37:07,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:37:07,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213285670] [2021-12-06 19:37:07,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:37:07,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:37:07,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:37:07,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:37:07,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:37:07,977 INFO L87 Difference]: Start difference. First operand 102800 states and 112946 transitions. Second operand has 3 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:37:10,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:37:10,176 INFO L93 Difference]: Finished difference Result 214543 states and 235819 transitions. [2021-12-06 19:37:10,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:37:10,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 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 630 [2021-12-06 19:37:10,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:37:10,282 INFO L225 Difference]: With dead ends: 214543 [2021-12-06 19:37:10,282 INFO L226 Difference]: Without dead ends: 112170 [2021-12-06 19:37:10,307 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 [2021-12-06 19:37:10,308 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 118 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 1371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 19:37:10,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 336 Invalid, 1371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1237 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-06 19:37:10,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112170 states. [2021-12-06 19:37:11,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112170 to 109609. [2021-12-06 19:37:11,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109609 states, 109608 states have (on average 1.0971553171301365) internal successors, (120257), 109608 states have internal predecessors, (120257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:37:11,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109609 states to 109609 states and 120257 transitions. [2021-12-06 19:37:11,837 INFO L78 Accepts]: Start accepts. Automaton has 109609 states and 120257 transitions. Word has length 630 [2021-12-06 19:37:11,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:37:11,837 INFO L470 AbstractCegarLoop]: Abstraction has 109609 states and 120257 transitions. [2021-12-06 19:37:11,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:37:11,837 INFO L276 IsEmpty]: Start isEmpty. Operand 109609 states and 120257 transitions. [2021-12-06 19:37:11,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 690 [2021-12-06 19:37:11,866 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:37:11,866 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:37:11,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 19:37:11,867 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:37:11,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:37:11,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1837793197, now seen corresponding path program 1 times [2021-12-06 19:37:11,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:37:11,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220632154] [2021-12-06 19:37:11,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:11,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:37:11,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:12,032 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 899 trivial. 0 not checked. [2021-12-06 19:37:12,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:37:12,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220632154] [2021-12-06 19:37:12,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220632154] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:37:12,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:37:12,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:37:12,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056768784] [2021-12-06 19:37:12,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:37:12,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:37:12,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:37:12,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:37:12,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:37:12,033 INFO L87 Difference]: Start difference. First operand 109609 states and 120257 transitions. Second operand has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:37:14,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:37:14,119 INFO L93 Difference]: Finished difference Result 221790 states and 243237 transitions. [2021-12-06 19:37:14,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:37:14,120 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 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 689 [2021-12-06 19:37:14,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:37:14,223 INFO L225 Difference]: With dead ends: 221790 [2021-12-06 19:37:14,224 INFO L226 Difference]: Without dead ends: 111327 [2021-12-06 19:37:14,270 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 [2021-12-06 19:37:14,270 INFO L933 BasicCegarLoop]: 723 mSDtfsCounter, 443 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1250 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 1343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 19:37:14,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 776 Invalid, 1343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1250 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-06 19:37:14,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111327 states. [2021-12-06 19:37:15,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111327 to 106624. [2021-12-06 19:37:15,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106624 states, 106623 states have (on average 1.097671234161485) internal successors, (117037), 106623 states have internal predecessors, (117037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:37:15,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106624 states to 106624 states and 117037 transitions. [2021-12-06 19:37:15,619 INFO L78 Accepts]: Start accepts. Automaton has 106624 states and 117037 transitions. Word has length 689 [2021-12-06 19:37:15,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:37:15,620 INFO L470 AbstractCegarLoop]: Abstraction has 106624 states and 117037 transitions. [2021-12-06 19:37:15,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:37:15,620 INFO L276 IsEmpty]: Start isEmpty. Operand 106624 states and 117037 transitions. [2021-12-06 19:37:15,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 694 [2021-12-06 19:37:15,651 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:37:15,651 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:37:15,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 19:37:15,651 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:37:15,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:37:15,652 INFO L85 PathProgramCache]: Analyzing trace with hash 963543129, now seen corresponding path program 1 times [2021-12-06 19:37:15,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:37:15,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174359576] [2021-12-06 19:37:15,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:15,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:37:15,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:15,905 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 336 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-06 19:37:15,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:37:15,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174359576] [2021-12-06 19:37:15,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174359576] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:37:15,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:37:15,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:37:15,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034875419] [2021-12-06 19:37:15,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:37:15,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:37:15,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:37:15,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:37:15,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:37:15,907 INFO L87 Difference]: Start difference. First operand 106624 states and 117037 transitions. Second operand has 3 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:37:18,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:37:18,337 INFO L93 Difference]: Finished difference Result 224330 states and 246270 transitions. [2021-12-06 19:37:18,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:37:18,338 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 0 states have call successors, (0), 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 693 [2021-12-06 19:37:18,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:37:18,464 INFO L225 Difference]: With dead ends: 224330 [2021-12-06 19:37:18,464 INFO L226 Difference]: Without dead ends: 117705 [2021-12-06 19:37:18,520 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 [2021-12-06 19:37:18,521 INFO L933 BasicCegarLoop]: 247 mSDtfsCounter, 126 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-06 19:37:18,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 300 Invalid, 1358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 1182 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-06 19:37:18,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117705 states. [2021-12-06 19:37:19,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117705 to 106200. [2021-12-06 19:37:19,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106200 states, 106199 states have (on average 1.0902550871477132) internal successors, (115784), 106199 states have internal predecessors, (115784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:37:19,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106200 states to 106200 states and 115784 transitions. [2021-12-06 19:37:19,952 INFO L78 Accepts]: Start accepts. Automaton has 106200 states and 115784 transitions. Word has length 693 [2021-12-06 19:37:19,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:37:19,953 INFO L470 AbstractCegarLoop]: Abstraction has 106200 states and 115784 transitions. [2021-12-06 19:37:19,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:37:19,953 INFO L276 IsEmpty]: Start isEmpty. Operand 106200 states and 115784 transitions. [2021-12-06 19:37:19,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 746 [2021-12-06 19:37:19,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:37:19,978 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1] [2021-12-06 19:37:19,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 19:37:19,979 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:37:19,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:37:19,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1157706383, now seen corresponding path program 1 times [2021-12-06 19:37:19,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:37:19,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481967377] [2021-12-06 19:37:19,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:19,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:37:20,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:20,184 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 386 proven. 0 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2021-12-06 19:37:20,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:37:20,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481967377] [2021-12-06 19:37:20,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481967377] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:37:20,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:37:20,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:37:20,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176328330] [2021-12-06 19:37:20,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:37:20,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:37:20,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:37:20,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:37:20,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:37:20,186 INFO L87 Difference]: Start difference. First operand 106200 states and 115784 transitions. Second operand has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:37:22,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:37:22,959 INFO L93 Difference]: Finished difference Result 237095 states and 258601 transitions. [2021-12-06 19:37:22,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:37:22,959 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 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 745 [2021-12-06 19:37:22,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:37:23,085 INFO L225 Difference]: With dead ends: 237095 [2021-12-06 19:37:23,085 INFO L226 Difference]: Without dead ends: 131322 [2021-12-06 19:37:23,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:37:23,132 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 589 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 2346 mSolverCounterSat, 313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 2659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 2346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:37:23,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [589 Valid, 286 Invalid, 2659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 2346 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 19:37:23,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131322 states. [2021-12-06 19:37:24,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131322 to 118944. [2021-12-06 19:37:24,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118944 states, 118943 states have (on average 1.08045870711181) internal successors, (128513), 118943 states have internal predecessors, (128513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:37:24,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118944 states to 118944 states and 128513 transitions. [2021-12-06 19:37:24,654 INFO L78 Accepts]: Start accepts. Automaton has 118944 states and 128513 transitions. Word has length 745 [2021-12-06 19:37:24,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:37:24,655 INFO L470 AbstractCegarLoop]: Abstraction has 118944 states and 128513 transitions. [2021-12-06 19:37:24,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:37:24,656 INFO L276 IsEmpty]: Start isEmpty. Operand 118944 states and 128513 transitions. [2021-12-06 19:37:24,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 752 [2021-12-06 19:37:24,695 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:37:24,695 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1] [2021-12-06 19:37:24,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 19:37:24,696 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:37:24,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:37:24,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1360092788, now seen corresponding path program 1 times [2021-12-06 19:37:24,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:37:24,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093205888] [2021-12-06 19:37:24,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:24,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:37:24,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:24,952 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 392 proven. 0 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2021-12-06 19:37:24,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:37:24,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093205888] [2021-12-06 19:37:24,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093205888] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:37:24,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:37:24,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:37:24,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071266263] [2021-12-06 19:37:24,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:37:24,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:37:24,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:37:24,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:37:24,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:37:24,954 INFO L87 Difference]: Start difference. First operand 118944 states and 128513 transitions. Second operand has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:37:27,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:37:27,763 INFO L93 Difference]: Finished difference Result 247700 states and 267251 transitions. [2021-12-06 19:37:27,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:37:27,763 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 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 751 [2021-12-06 19:37:27,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:37:27,882 INFO L225 Difference]: With dead ends: 247700 [2021-12-06 19:37:27,882 INFO L226 Difference]: Without dead ends: 129183 [2021-12-06 19:37:27,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:37:27,932 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 591 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 2329 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 2583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 2329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:37:27,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [591 Valid, 285 Invalid, 2583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 2329 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 19:37:28,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129183 states. [2021-12-06 19:37:29,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129183 to 118944. [2021-12-06 19:37:29,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118944 states, 118943 states have (on average 1.0800887820216407) internal successors, (128469), 118943 states have internal predecessors, (128469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:37:29,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118944 states to 118944 states and 128469 transitions. [2021-12-06 19:37:29,417 INFO L78 Accepts]: Start accepts. Automaton has 118944 states and 128469 transitions. Word has length 751 [2021-12-06 19:37:29,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:37:29,418 INFO L470 AbstractCegarLoop]: Abstraction has 118944 states and 128469 transitions. [2021-12-06 19:37:29,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:37:29,418 INFO L276 IsEmpty]: Start isEmpty. Operand 118944 states and 128469 transitions. [2021-12-06 19:37:29,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 778 [2021-12-06 19:37:29,444 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:37:29,444 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:37:29,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 19:37:29,445 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:37:29,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:37:29,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1706768654, now seen corresponding path program 1 times [2021-12-06 19:37:29,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:37:29,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14894481] [2021-12-06 19:37:29,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:29,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:37:29,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:29,699 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 661 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 19:37:29,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:37:29,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14894481] [2021-12-06 19:37:29,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14894481] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:37:29,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:37:29,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:37:29,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291520320] [2021-12-06 19:37:29,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:37:29,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:37:29,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:37:29,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:37:29,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:37:29,701 INFO L87 Difference]: Start difference. First operand 118944 states and 128469 transitions. Second operand has 6 states, 6 states have (on average 129.0) internal successors, (774), 5 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:37:32,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:37:32,930 INFO L93 Difference]: Finished difference Result 235335 states and 254009 transitions. [2021-12-06 19:37:32,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 19:37:32,931 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 129.0) internal successors, (774), 5 states have internal predecessors, (774), 0 states have call successors, (0), 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 777 [2021-12-06 19:37:32,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:37:33,034 INFO L225 Difference]: With dead ends: 235335 [2021-12-06 19:37:33,034 INFO L226 Difference]: Without dead ends: 116818 [2021-12-06 19:37:33,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-12-06 19:37:33,067 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 1457 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 3675 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1457 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 4014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 3675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-06 19:37:33,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1457 Valid, 242 Invalid, 4014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 3675 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-06 19:37:33,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116818 states. [2021-12-06 19:37:34,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116818 to 114241. [2021-12-06 19:37:34,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114241 states, 114240 states have (on average 1.078860294117647) internal successors, (123249), 114240 states have internal predecessors, (123249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:37:34,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114241 states to 114241 states and 123249 transitions. [2021-12-06 19:37:34,355 INFO L78 Accepts]: Start accepts. Automaton has 114241 states and 123249 transitions. Word has length 777 [2021-12-06 19:37:34,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:37:34,355 INFO L470 AbstractCegarLoop]: Abstraction has 114241 states and 123249 transitions. [2021-12-06 19:37:34,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 129.0) internal successors, (774), 5 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:37:34,355 INFO L276 IsEmpty]: Start isEmpty. Operand 114241 states and 123249 transitions. [2021-12-06 19:37:34,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 840 [2021-12-06 19:37:34,385 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:37:34,386 INFO L514 BasicCegarLoop]: trace histogram [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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:37:34,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-06 19:37:34,386 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:37:34,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:37:34,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1127075602, now seen corresponding path program 1 times [2021-12-06 19:37:34,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:37:34,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808871716] [2021-12-06 19:37:34,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:34,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:37:34,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:34,624 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 767 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-12-06 19:37:34,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:37:34,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808871716] [2021-12-06 19:37:34,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808871716] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:37:34,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:37:34,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:37:34,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84037551] [2021-12-06 19:37:34,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:37:34,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:37:34,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:37:34,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:37:34,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:37:34,626 INFO L87 Difference]: Start difference. First operand 114241 states and 123249 transitions. Second operand has 4 states, 4 states have (on average 171.25) internal successors, (685), 4 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:37:38,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:37:38,178 INFO L93 Difference]: Finished difference Result 256596 states and 276395 transitions. [2021-12-06 19:37:38,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:37:38,179 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 171.25) internal successors, (685), 4 states have internal predecessors, (685), 0 states have call successors, (0), 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 839 [2021-12-06 19:37:38,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:37:38,309 INFO L225 Difference]: With dead ends: 256596 [2021-12-06 19:37:38,309 INFO L226 Difference]: Without dead ends: 141932 [2021-12-06 19:37:38,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:37:38,358 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 428 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 2365 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 2745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 2365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:37:38,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 241 Invalid, 2745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 2365 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-06 19:37:38,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141932 states. [2021-12-06 19:37:39,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141932 to 136821. [2021-12-06 19:37:39,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136821 states, 136820 states have (on average 1.0744627978365735) internal successors, (147008), 136820 states have internal predecessors, (147008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:37:39,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136821 states to 136821 states and 147008 transitions. [2021-12-06 19:37:39,900 INFO L78 Accepts]: Start accepts. Automaton has 136821 states and 147008 transitions. Word has length 839 [2021-12-06 19:37:39,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:37:39,901 INFO L470 AbstractCegarLoop]: Abstraction has 136821 states and 147008 transitions. [2021-12-06 19:37:39,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 171.25) internal successors, (685), 4 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:37:39,901 INFO L276 IsEmpty]: Start isEmpty. Operand 136821 states and 147008 transitions. [2021-12-06 19:37:39,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 843 [2021-12-06 19:37:39,935 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:37:39,935 INFO L514 BasicCegarLoop]: trace histogram [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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2021-12-06 19:37:39,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-06 19:37:39,936 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:37:39,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:37:39,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1107321947, now seen corresponding path program 1 times [2021-12-06 19:37:39,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:37:39,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235625652] [2021-12-06 19:37:39,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:39,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:37:40,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:40,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 786 proven. 0 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2021-12-06 19:37:40,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:37:40,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235625652] [2021-12-06 19:37:40,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235625652] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:37:40,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:37:40,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:37:40,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265969162] [2021-12-06 19:37:40,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:37:40,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:37:40,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:37:40,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:37:40,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:37:40,130 INFO L87 Difference]: Start difference. First operand 136821 states and 147008 transitions. Second operand has 3 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:37:42,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:37:42,469 INFO L93 Difference]: Finished difference Result 286012 states and 307472 transitions. [2021-12-06 19:37:42,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:37:42,469 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 0 states have call successors, (0), 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 842 [2021-12-06 19:37:42,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:37:42,614 INFO L225 Difference]: With dead ends: 286012 [2021-12-06 19:37:42,615 INFO L226 Difference]: Without dead ends: 149618 [2021-12-06 19:37:42,675 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 [2021-12-06 19:37:42,676 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 437 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1193 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 1386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 1193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 19:37:42,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 239 Invalid, 1386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 1193 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-06 19:37:42,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149618 states. [2021-12-06 19:37:44,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149618 to 145762. [2021-12-06 19:37:44,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145762 states, 145761 states have (on average 1.0735930735930737) internal successors, (156488), 145761 states have internal predecessors, (156488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:37:44,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145762 states to 145762 states and 156488 transitions. [2021-12-06 19:37:44,593 INFO L78 Accepts]: Start accepts. Automaton has 145762 states and 156488 transitions. Word has length 842 [2021-12-06 19:37:44,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:37:44,593 INFO L470 AbstractCegarLoop]: Abstraction has 145762 states and 156488 transitions. [2021-12-06 19:37:44,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:37:44,593 INFO L276 IsEmpty]: Start isEmpty. Operand 145762 states and 156488 transitions. [2021-12-06 19:37:44,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 851 [2021-12-06 19:37:44,626 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:37:44,626 INFO L514 BasicCegarLoop]: trace histogram [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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:37:44,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-06 19:37:44,627 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:37:44,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:37:44,627 INFO L85 PathProgramCache]: Analyzing trace with hash 883772637, now seen corresponding path program 1 times [2021-12-06 19:37:44,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:37:44,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583562925] [2021-12-06 19:37:44,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:44,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:37:44,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:44,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 905 proven. 105 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-06 19:37:44,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:37:44,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583562925] [2021-12-06 19:37:44,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583562925] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:37:44,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851289059] [2021-12-06 19:37:44,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:44,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:37:44,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:37:44,873 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:37:44,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 19:37:45,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:45,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 1043 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 19:37:45,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:37:46,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 947 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-06 19:37:46,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:37:46,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851289059] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:37:46,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:37:46,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-12-06 19:37:46,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890826231] [2021-12-06 19:37:46,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:37:46,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:37:46,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:37:46,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:37:46,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:37:46,074 INFO L87 Difference]: Start difference. First operand 145762 states and 156488 transitions. Second operand has 5 states, 5 states have (on average 141.4) internal successors, (707), 5 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:37:50,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:37:50,215 INFO L93 Difference]: Finished difference Result 306906 states and 329162 transitions. [2021-12-06 19:37:50,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:37:50,216 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 141.4) internal successors, (707), 5 states have internal predecessors, (707), 0 states have call successors, (0), 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 850 [2021-12-06 19:37:50,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:37:50,363 INFO L225 Difference]: With dead ends: 306906 [2021-12-06 19:37:50,363 INFO L226 Difference]: Without dead ends: 161571 [2021-12-06 19:37:50,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 854 GetRequests, 848 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:37:50,404 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 1144 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 4093 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1144 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 4416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 4093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:37:50,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1144 Valid, 368 Invalid, 4416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 4093 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-12-06 19:37:50,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161571 states. [2021-12-06 19:37:51,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161571 to 156423. [2021-12-06 19:37:52,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156423 states, 156422 states have (on average 1.0680339082737722) internal successors, (167064), 156422 states have internal predecessors, (167064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:37:52,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156423 states to 156423 states and 167064 transitions. [2021-12-06 19:37:52,181 INFO L78 Accepts]: Start accepts. Automaton has 156423 states and 167064 transitions. Word has length 850 [2021-12-06 19:37:52,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:37:52,182 INFO L470 AbstractCegarLoop]: Abstraction has 156423 states and 167064 transitions. [2021-12-06 19:37:52,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 141.4) internal successors, (707), 5 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:37:52,182 INFO L276 IsEmpty]: Start isEmpty. Operand 156423 states and 167064 transitions. [2021-12-06 19:37:52,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 863 [2021-12-06 19:37:52,217 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:37:52,218 INFO L514 BasicCegarLoop]: trace histogram [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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:37:52,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 19:37:52,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-06 19:37:52,420 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:37:52,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:37:52,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1185606266, now seen corresponding path program 1 times [2021-12-06 19:37:52,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:37:52,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111421718] [2021-12-06 19:37:52,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:52,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:37:52,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:52,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 545 proven. 0 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2021-12-06 19:37:52,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:37:52,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111421718] [2021-12-06 19:37:52,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111421718] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:37:52,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:37:52,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:37:52,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403855188] [2021-12-06 19:37:52,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:37:52,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:37:52,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:37:52,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:37:52,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:37:52,789 INFO L87 Difference]: Start difference. First operand 156423 states and 167064 transitions. Second operand has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:37:55,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:37:55,260 INFO L93 Difference]: Finished difference Result 321388 states and 343047 transitions. [2021-12-06 19:37:55,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:37:55,260 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 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 862 [2021-12-06 19:37:55,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:37:55,412 INFO L225 Difference]: With dead ends: 321388 [2021-12-06 19:37:55,412 INFO L226 Difference]: Without dead ends: 165392 [2021-12-06 19:37:55,462 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 [2021-12-06 19:37:55,462 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 491 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 1233 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 1426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 1233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 19:37:55,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [491 Valid, 237 Invalid, 1426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 1233 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-06 19:37:55,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165392 states. [2021-12-06 19:37:57,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165392 to 143621. [2021-12-06 19:37:57,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143621 states, 143620 states have (on average 1.0637167525414288) internal successors, (152771), 143620 states have internal predecessors, (152771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:37:57,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143621 states to 143621 states and 152771 transitions. [2021-12-06 19:37:57,214 INFO L78 Accepts]: Start accepts. Automaton has 143621 states and 152771 transitions. Word has length 862 [2021-12-06 19:37:57,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:37:57,214 INFO L470 AbstractCegarLoop]: Abstraction has 143621 states and 152771 transitions. [2021-12-06 19:37:57,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:37:57,214 INFO L276 IsEmpty]: Start isEmpty. Operand 143621 states and 152771 transitions. [2021-12-06 19:37:57,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 907 [2021-12-06 19:37:57,257 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:37:57,258 INFO L514 BasicCegarLoop]: trace histogram [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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:37:57,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-06 19:37:57,258 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:37:57,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:37:57,259 INFO L85 PathProgramCache]: Analyzing trace with hash 687009193, now seen corresponding path program 1 times [2021-12-06 19:37:57,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:37:57,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927471394] [2021-12-06 19:37:57,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:57,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:37:57,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:57,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 920 proven. 0 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2021-12-06 19:37:57,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:37:57,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927471394] [2021-12-06 19:37:57,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927471394] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:37:57,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:37:57,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:37:57,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478787198] [2021-12-06 19:37:57,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:37:57,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:37:57,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:37:57,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:37:57,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:37:57,602 INFO L87 Difference]: Start difference. First operand 143621 states and 152771 transitions. Second operand has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:38:01,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:38:01,335 INFO L93 Difference]: Finished difference Result 332800 states and 353686 transitions. [2021-12-06 19:38:01,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:38:01,335 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 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 906 [2021-12-06 19:38:01,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:38:01,493 INFO L225 Difference]: With dead ends: 332800 [2021-12-06 19:38:01,493 INFO L226 Difference]: Without dead ends: 188756 [2021-12-06 19:38:01,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:38:01,533 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 1393 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 2660 mSolverCounterSat, 639 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1393 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 3299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 639 IncrementalHoareTripleChecker+Valid, 2660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:38:01,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1393 Valid, 196 Invalid, 3299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [639 Valid, 2660 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-06 19:38:01,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188756 states. [2021-12-06 19:38:03,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188756 to 167023. [2021-12-06 19:38:03,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167023 states, 167022 states have (on average 1.0571840835339057) internal successors, (176573), 167022 states have internal predecessors, (176573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:38:03,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167023 states to 167023 states and 176573 transitions. [2021-12-06 19:38:03,546 INFO L78 Accepts]: Start accepts. Automaton has 167023 states and 176573 transitions. Word has length 906 [2021-12-06 19:38:03,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:38:03,547 INFO L470 AbstractCegarLoop]: Abstraction has 167023 states and 176573 transitions. [2021-12-06 19:38:03,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:38:03,547 INFO L276 IsEmpty]: Start isEmpty. Operand 167023 states and 176573 transitions. [2021-12-06 19:38:03,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 913 [2021-12-06 19:38:03,590 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:38:03,591 INFO L514 BasicCegarLoop]: trace histogram [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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:38:03,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-06 19:38:03,591 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:38:03,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:38:03,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1330884026, now seen corresponding path program 1 times [2021-12-06 19:38:03,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:38:03,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361628381] [2021-12-06 19:38:03,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:38:03,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:38:03,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:03,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1197 backedges. 755 proven. 160 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2021-12-06 19:38:03,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:38:03,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361628381] [2021-12-06 19:38:03,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361628381] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:38:03,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450243404] [2021-12-06 19:38:03,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:38:03,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:38:03,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:38:03,852 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:38:03,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 19:38:04,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:04,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 1106 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 19:38:04,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:38:04,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1197 backedges. 707 proven. 82 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2021-12-06 19:38:04,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:38:06,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1197 backedges. 707 proven. 82 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2021-12-06 19:38:06,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450243404] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:38:06,356 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:38:06,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2021-12-06 19:38:06,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914648231] [2021-12-06 19:38:06,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:38:06,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 19:38:06,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:38:06,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 19:38:06,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:38:06,359 INFO L87 Difference]: Start difference. First operand 167023 states and 176573 transitions. Second operand has 8 states, 8 states have (on average 200.125) internal successors, (1601), 8 states have internal predecessors, (1601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:38:16,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:38:16,378 INFO L93 Difference]: Finished difference Result 389422 states and 412291 transitions. [2021-12-06 19:38:16,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 19:38:16,379 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 200.125) internal successors, (1601), 8 states have internal predecessors, (1601), 0 states have call successors, (0), 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 912 [2021-12-06 19:38:16,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:38:16,610 INFO L225 Difference]: With dead ends: 389422 [2021-12-06 19:38:16,610 INFO L226 Difference]: Without dead ends: 222825 [2021-12-06 19:38:16,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1842 GetRequests, 1828 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-12-06 19:38:16,668 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 5902 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 9524 mSolverCounterSat, 1444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5902 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 10968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1444 IncrementalHoareTripleChecker+Valid, 9524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2021-12-06 19:38:16,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5902 Valid, 316 Invalid, 10968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1444 Valid, 9524 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2021-12-06 19:38:16,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222825 states. [2021-12-06 19:38:18,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222825 to 195148. [2021-12-06 19:38:18,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195148 states, 195147 states have (on average 1.0581100401235992) internal successors, (206487), 195147 states have internal predecessors, (206487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:38:18,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195148 states to 195148 states and 206487 transitions. [2021-12-06 19:38:18,992 INFO L78 Accepts]: Start accepts. Automaton has 195148 states and 206487 transitions. Word has length 912 [2021-12-06 19:38:18,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:38:18,992 INFO L470 AbstractCegarLoop]: Abstraction has 195148 states and 206487 transitions. [2021-12-06 19:38:18,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 200.125) internal successors, (1601), 8 states have internal predecessors, (1601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:38:18,992 INFO L276 IsEmpty]: Start isEmpty. Operand 195148 states and 206487 transitions. [2021-12-06 19:38:19,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 979 [2021-12-06 19:38:19,027 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:38:19,028 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:38:19,049 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 19:38:19,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-06 19:38:19,230 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:38:19,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:38:19,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1866100324, now seen corresponding path program 1 times [2021-12-06 19:38:19,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:38:19,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146421828] [2021-12-06 19:38:19,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:38:19,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:38:19,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:19,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1529 backedges. 627 proven. 0 refuted. 0 times theorem prover too weak. 902 trivial. 0 not checked. [2021-12-06 19:38:19,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:38:19,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146421828] [2021-12-06 19:38:19,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146421828] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:38:19,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:38:19,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:38:19,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423273628] [2021-12-06 19:38:19,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:38:19,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:38:19,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:38:19,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:38:19,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:38:19,498 INFO L87 Difference]: Start difference. First operand 195148 states and 206487 transitions. Second operand has 3 states, 3 states have (on average 194.33333333333334) internal successors, (583), 3 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:38:21,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:38:21,748 INFO L93 Difference]: Finished difference Result 391998 states and 414714 transitions. [2021-12-06 19:38:21,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:38:21,749 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 194.33333333333334) internal successors, (583), 3 states have internal predecessors, (583), 0 states have call successors, (0), 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 978 [2021-12-06 19:38:21,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:38:21,936 INFO L225 Difference]: With dead ends: 391998 [2021-12-06 19:38:21,936 INFO L226 Difference]: Without dead ends: 196850 [2021-12-06 19:38:21,999 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 [2021-12-06 19:38:21,999 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 103 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 1248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:38:21,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 279 Invalid, 1248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 19:38:22,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196850 states. [2021-12-06 19:38:23,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196850 to 188764. [2021-12-06 19:38:23,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188764 states, 188763 states have (on average 1.0584383592123456) internal successors, (199794), 188763 states have internal predecessors, (199794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:38:24,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188764 states to 188764 states and 199794 transitions. [2021-12-06 19:38:24,146 INFO L78 Accepts]: Start accepts. Automaton has 188764 states and 199794 transitions. Word has length 978 [2021-12-06 19:38:24,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:38:24,147 INFO L470 AbstractCegarLoop]: Abstraction has 188764 states and 199794 transitions. [2021-12-06 19:38:24,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 194.33333333333334) internal successors, (583), 3 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:38:24,147 INFO L276 IsEmpty]: Start isEmpty. Operand 188764 states and 199794 transitions. [2021-12-06 19:38:24,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1012 [2021-12-06 19:38:24,191 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:38:24,192 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2021-12-06 19:38:24,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-06 19:38:24,192 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:38:24,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:38:24,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1192044291, now seen corresponding path program 1 times [2021-12-06 19:38:24,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:38:24,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724423245] [2021-12-06 19:38:24,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:38:24,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:38:24,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:24,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1731 backedges. 1051 proven. 0 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2021-12-06 19:38:24,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:38:24,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724423245] [2021-12-06 19:38:24,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724423245] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:38:24,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:38:24,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:38:24,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229993487] [2021-12-06 19:38:24,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:38:24,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:38:24,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:38:24,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:38:24,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:38:24,442 INFO L87 Difference]: Start difference. First operand 188764 states and 199794 transitions. Second operand has 3 states, 3 states have (on average 213.33333333333334) internal successors, (640), 3 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:38:26,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:38:26,879 INFO L93 Difference]: Finished difference Result 326361 states and 344616 transitions. [2021-12-06 19:38:26,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:38:26,880 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 213.33333333333334) internal successors, (640), 3 states have internal predecessors, (640), 0 states have call successors, (0), 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 1011 [2021-12-06 19:38:26,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:38:27,009 INFO L225 Difference]: With dead ends: 326361 [2021-12-06 19:38:27,009 INFO L226 Difference]: Without dead ends: 138024 [2021-12-06 19:38:27,268 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 [2021-12-06 19:38:27,269 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 348 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 1126 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 19:38:27,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 215 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1126 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-06 19:38:27,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138024 states. [2021-12-06 19:38:28,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138024 to 133315. [2021-12-06 19:38:28,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133315 states, 133314 states have (on average 1.0450740357351815) internal successors, (139323), 133314 states have internal predecessors, (139323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:38:28,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133315 states to 133315 states and 139323 transitions. [2021-12-06 19:38:28,654 INFO L78 Accepts]: Start accepts. Automaton has 133315 states and 139323 transitions. Word has length 1011 [2021-12-06 19:38:28,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:38:28,655 INFO L470 AbstractCegarLoop]: Abstraction has 133315 states and 139323 transitions. [2021-12-06 19:38:28,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 213.33333333333334) internal successors, (640), 3 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:38:28,655 INFO L276 IsEmpty]: Start isEmpty. Operand 133315 states and 139323 transitions. [2021-12-06 19:38:28,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1013 [2021-12-06 19:38:28,686 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:38:28,687 INFO L514 BasicCegarLoop]: trace histogram [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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:38:28,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-06 19:38:28,687 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:38:28,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:38:28,688 INFO L85 PathProgramCache]: Analyzing trace with hash -890267376, now seen corresponding path program 1 times [2021-12-06 19:38:28,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:38:28,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933314885] [2021-12-06 19:38:28,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:38:28,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:38:28,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:28,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 1094 proven. 105 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-06 19:38:28,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:38:28,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933314885] [2021-12-06 19:38:28,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933314885] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:38:28,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402891497] [2021-12-06 19:38:28,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:38:28,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:38:28,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:38:28,979 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:38:28,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 19:38:29,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:29,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 1206 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 19:38:29,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:38:30,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 926 proven. 273 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-06 19:38:30,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:38:31,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 949 proven. 0 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2021-12-06 19:38:31,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402891497] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 19:38:31,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:38:31,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 6] total 12 [2021-12-06 19:38:31,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30826560] [2021-12-06 19:38:31,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:38:31,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:38:31,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:38:31,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:38:31,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-12-06 19:38:31,555 INFO L87 Difference]: Start difference. First operand 133315 states and 139323 transitions. Second operand has 5 states, 5 states have (on average 152.8) internal successors, (764), 5 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:38:35,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:38:35,220 INFO L93 Difference]: Finished difference Result 280658 states and 293130 transitions. [2021-12-06 19:38:35,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:38:35,221 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 152.8) internal successors, (764), 5 states have internal predecessors, (764), 0 states have call successors, (0), 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 1012 [2021-12-06 19:38:35,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:38:35,354 INFO L225 Difference]: With dead ends: 280658 [2021-12-06 19:38:35,354 INFO L226 Difference]: Without dead ends: 147770 [2021-12-06 19:38:35,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2027 GetRequests, 2017 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-12-06 19:38:35,416 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 1975 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 2085 mSolverCounterSat, 634 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1975 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 2719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 634 IncrementalHoareTripleChecker+Valid, 2085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:38:35,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1975 Valid, 90 Invalid, 2719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [634 Valid, 2085 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-06 19:38:35,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147770 states. [2021-12-06 19:38:36,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147770 to 137565. [2021-12-06 19:38:36,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137565 states, 137564 states have (on average 1.0446846558692682) internal successors, (143711), 137564 states have internal predecessors, (143711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:38:37,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137565 states to 137565 states and 143711 transitions. [2021-12-06 19:38:37,057 INFO L78 Accepts]: Start accepts. Automaton has 137565 states and 143711 transitions. Word has length 1012 [2021-12-06 19:38:37,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:38:37,058 INFO L470 AbstractCegarLoop]: Abstraction has 137565 states and 143711 transitions. [2021-12-06 19:38:37,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 152.8) internal successors, (764), 5 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:38:37,058 INFO L276 IsEmpty]: Start isEmpty. Operand 137565 states and 143711 transitions. [2021-12-06 19:38:37,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1061 [2021-12-06 19:38:37,092 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:38:37,093 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:38:37,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 19:38:37,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:38:37,294 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:38:37,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:38:37,294 INFO L85 PathProgramCache]: Analyzing trace with hash -117532975, now seen corresponding path program 1 times [2021-12-06 19:38:37,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:38:37,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321220772] [2021-12-06 19:38:37,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:38:37,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:38:37,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:37,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1686 backedges. 709 proven. 0 refuted. 0 times theorem prover too weak. 977 trivial. 0 not checked. [2021-12-06 19:38:37,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:38:37,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321220772] [2021-12-06 19:38:37,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321220772] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:38:37,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:38:37,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:38:37,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469305062] [2021-12-06 19:38:37,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:38:37,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:38:37,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:38:37,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:38:37,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:38:37,608 INFO L87 Difference]: Start difference. First operand 137565 states and 143711 transitions. Second operand has 4 states, 4 states have (on average 149.25) internal successors, (597), 4 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:38:40,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:38:40,647 INFO L93 Difference]: Finished difference Result 285784 states and 298367 transitions. [2021-12-06 19:38:40,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:38:40,648 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 149.25) internal successors, (597), 4 states have internal predecessors, (597), 0 states have call successors, (0), 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 1060 [2021-12-06 19:38:40,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:38:40,788 INFO L225 Difference]: With dead ends: 285784 [2021-12-06 19:38:40,788 INFO L226 Difference]: Without dead ends: 148646 [2021-12-06 19:38:40,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:38:40,843 INFO L933 BasicCegarLoop]: 610 mSDtfsCounter, 524 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 3025 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 3130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 3025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:38:40,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [524 Valid, 697 Invalid, 3130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 3025 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 19:38:40,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148646 states. [2021-12-06 19:38:42,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148646 to 137565. [2021-12-06 19:38:42,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137565 states, 137564 states have (on average 1.0445974237445843) internal successors, (143699), 137564 states have internal predecessors, (143699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:38:42,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137565 states to 137565 states and 143699 transitions. [2021-12-06 19:38:42,440 INFO L78 Accepts]: Start accepts. Automaton has 137565 states and 143699 transitions. Word has length 1060 [2021-12-06 19:38:42,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:38:42,441 INFO L470 AbstractCegarLoop]: Abstraction has 137565 states and 143699 transitions. [2021-12-06 19:38:42,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 149.25) internal successors, (597), 4 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:38:42,441 INFO L276 IsEmpty]: Start isEmpty. Operand 137565 states and 143699 transitions. [2021-12-06 19:38:42,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1066 [2021-12-06 19:38:42,476 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:38:42,477 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:38:42,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-06 19:38:42,477 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:38:42,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:38:42,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1331134709, now seen corresponding path program 1 times [2021-12-06 19:38:42,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:38:42,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862774164] [2021-12-06 19:38:42,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:38:42,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:38:42,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:42,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1574 backedges. 1240 proven. 0 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2021-12-06 19:38:42,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:38:42,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862774164] [2021-12-06 19:38:42,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862774164] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:38:42,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:38:42,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:38:42,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473382352] [2021-12-06 19:38:42,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:38:42,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:38:42,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:38:42,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:38:42,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:38:42,774 INFO L87 Difference]: Start difference. First operand 137565 states and 143699 transitions. Second operand has 3 states, 3 states have (on average 270.6666666666667) internal successors, (812), 3 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:38:44,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:38:44,765 INFO L93 Difference]: Finished difference Result 275133 states and 287359 transitions. [2021-12-06 19:38:44,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:38:44,766 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 270.6666666666667) internal successors, (812), 3 states have internal predecessors, (812), 0 states have call successors, (0), 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 1065 [2021-12-06 19:38:44,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:38:44,880 INFO L225 Difference]: With dead ends: 275133 [2021-12-06 19:38:44,881 INFO L226 Difference]: Without dead ends: 137995 [2021-12-06 19:38:44,923 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 [2021-12-06 19:38:44,923 INFO L933 BasicCegarLoop]: 660 mSDtfsCounter, 113 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 1070 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:38:44,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 695 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1070 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 19:38:45,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137995 states. [2021-12-06 19:38:46,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137995 to 122251. [2021-12-06 19:38:46,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122251 states, 122250 states have (on average 1.0466584867075666) internal successors, (127954), 122250 states have internal predecessors, (127954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:38:46,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122251 states to 122251 states and 127954 transitions. [2021-12-06 19:38:46,367 INFO L78 Accepts]: Start accepts. Automaton has 122251 states and 127954 transitions. Word has length 1065 [2021-12-06 19:38:46,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:38:46,368 INFO L470 AbstractCegarLoop]: Abstraction has 122251 states and 127954 transitions. [2021-12-06 19:38:46,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 270.6666666666667) internal successors, (812), 3 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:38:46,368 INFO L276 IsEmpty]: Start isEmpty. Operand 122251 states and 127954 transitions. [2021-12-06 19:38:46,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1081 [2021-12-06 19:38:46,398 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:38:46,399 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:38:46,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-06 19:38:46,399 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:38:46,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:38:46,399 INFO L85 PathProgramCache]: Analyzing trace with hash -493840972, now seen corresponding path program 1 times [2021-12-06 19:38:46,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:38:46,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999976284] [2021-12-06 19:38:46,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:38:46,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:38:46,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:46,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1708 backedges. 775 proven. 82 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2021-12-06 19:38:46,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:38:46,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999976284] [2021-12-06 19:38:46,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999976284] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:38:46,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338165587] [2021-12-06 19:38:46,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:38:46,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:38:46,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:38:46,697 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:38:46,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 19:38:46,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:46,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 1298 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 19:38:46,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:38:48,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1708 backedges. 775 proven. 82 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2021-12-06 19:38:48,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:38:49,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1708 backedges. 856 proven. 1 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2021-12-06 19:38:49,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338165587] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:38:49,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:38:49,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2021-12-06 19:38:49,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356192869] [2021-12-06 19:38:49,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:38:49,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 19:38:49,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:38:49,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 19:38:49,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:38:49,432 INFO L87 Difference]: Start difference. First operand 122251 states and 127954 transitions. Second operand has 10 states, 10 states have (on average 91.1) internal successors, (911), 9 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:38:55,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:38:55,081 INFO L93 Difference]: Finished difference Result 248917 states and 260364 transitions. [2021-12-06 19:38:55,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 19:38:55,082 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 91.1) internal successors, (911), 9 states have internal predecessors, (911), 0 states have call successors, (0), 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 1080 [2021-12-06 19:38:55,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:38:55,187 INFO L225 Difference]: With dead ends: 248917 [2021-12-06 19:38:55,187 INFO L226 Difference]: Without dead ends: 127093 [2021-12-06 19:38:55,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2169 GetRequests, 2155 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-12-06 19:38:55,220 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 3191 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 6071 mSolverCounterSat, 633 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3191 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 6704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 633 IncrementalHoareTripleChecker+Valid, 6071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-12-06 19:38:55,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3191 Valid, 291 Invalid, 6704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [633 Valid, 6071 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-12-06 19:38:55,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127093 states. [2021-12-06 19:38:56,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127093 to 106910. [2021-12-06 19:38:56,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106910 states, 106909 states have (on average 1.0478444284391397) internal successors, (112024), 106909 states have internal predecessors, (112024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:38:56,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106910 states to 106910 states and 112024 transitions. [2021-12-06 19:38:56,489 INFO L78 Accepts]: Start accepts. Automaton has 106910 states and 112024 transitions. Word has length 1080 [2021-12-06 19:38:56,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:38:56,489 INFO L470 AbstractCegarLoop]: Abstraction has 106910 states and 112024 transitions. [2021-12-06 19:38:56,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 91.1) internal successors, (911), 9 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:38:56,489 INFO L276 IsEmpty]: Start isEmpty. Operand 106910 states and 112024 transitions. [2021-12-06 19:38:56,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1141 [2021-12-06 19:38:56,517 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:38:56,518 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:38:56,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 19:38:56,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:38:56,721 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:38:56,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:38:56,723 INFO L85 PathProgramCache]: Analyzing trace with hash -52998844, now seen corresponding path program 1 times [2021-12-06 19:38:56,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:38:56,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162450467] [2021-12-06 19:38:56,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:38:56,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:38:56,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:57,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2129 backedges. 1259 proven. 0 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2021-12-06 19:38:57,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:38:57,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162450467] [2021-12-06 19:38:57,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162450467] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:38:57,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:38:57,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:38:57,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383849819] [2021-12-06 19:38:57,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:38:57,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:38:57,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:38:57,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:38:57,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:38:57,030 INFO L87 Difference]: Start difference. First operand 106910 states and 112024 transitions. Second operand has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:38:58,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:38:58,946 INFO L93 Difference]: Finished difference Result 221478 states and 231920 transitions. [2021-12-06 19:38:58,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:38:58,947 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 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 1140 [2021-12-06 19:38:58,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:38:59,047 INFO L225 Difference]: With dead ends: 221478 [2021-12-06 19:38:59,047 INFO L226 Difference]: Without dead ends: 114570 [2021-12-06 19:38:59,094 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 [2021-12-06 19:38:59,095 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 390 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1072 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:38:59,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 240 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1072 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 19:38:59,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114570 states. [2021-12-06 19:39:00,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114570 to 111584. [2021-12-06 19:39:00,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111584 states, 111583 states have (on average 1.0445497970120896) internal successors, (116554), 111583 states have internal predecessors, (116554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:39:00,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111584 states to 111584 states and 116554 transitions. [2021-12-06 19:39:00,384 INFO L78 Accepts]: Start accepts. Automaton has 111584 states and 116554 transitions. Word has length 1140 [2021-12-06 19:39:00,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:39:00,385 INFO L470 AbstractCegarLoop]: Abstraction has 111584 states and 116554 transitions. [2021-12-06 19:39:00,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:39:00,385 INFO L276 IsEmpty]: Start isEmpty. Operand 111584 states and 116554 transitions. [2021-12-06 19:39:00,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1258 [2021-12-06 19:39:00,421 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:39:00,422 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:39:00,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-06 19:39:00,422 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:39:00,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:39:00,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1364715017, now seen corresponding path program 1 times [2021-12-06 19:39:00,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:39:00,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231381422] [2021-12-06 19:39:00,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:39:00,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:39:00,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:39:00,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1408 backedges. 1311 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-12-06 19:39:00,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:39:00,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231381422] [2021-12-06 19:39:00,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231381422] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:39:00,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:39:00,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:39:00,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659515248] [2021-12-06 19:39:00,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:39:00,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:39:00,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:39:00,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:39:00,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:39:00,805 INFO L87 Difference]: Start difference. First operand 111584 states and 116554 transitions. Second operand has 4 states, 4 states have (on average 290.25) internal successors, (1161), 4 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:39:03,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:39:03,922 INFO L93 Difference]: Finished difference Result 232949 states and 243185 transitions. [2021-12-06 19:39:03,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:39:03,922 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 290.25) internal successors, (1161), 4 states have internal predecessors, (1161), 0 states have call successors, (0), 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 1257 [2021-12-06 19:39:03,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:39:04,032 INFO L225 Difference]: With dead ends: 232949 [2021-12-06 19:39:04,032 INFO L226 Difference]: Without dead ends: 121367 [2021-12-06 19:39:04,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:39:04,083 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 188 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 2143 mSolverCounterSat, 364 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 2507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 364 IncrementalHoareTripleChecker+Valid, 2143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-06 19:39:04,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 132 Invalid, 2507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [364 Valid, 2143 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-06 19:39:04,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121367 states. [2021-12-06 19:39:05,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121367 to 106903. [2021-12-06 19:39:05,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106903 states, 106902 states have (on average 1.0414398233896467) internal successors, (111332), 106902 states have internal predecessors, (111332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:39:05,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106903 states to 106903 states and 111332 transitions. [2021-12-06 19:39:05,391 INFO L78 Accepts]: Start accepts. Automaton has 106903 states and 111332 transitions. Word has length 1257 [2021-12-06 19:39:05,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:39:05,392 INFO L470 AbstractCegarLoop]: Abstraction has 106903 states and 111332 transitions. [2021-12-06 19:39:05,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 290.25) internal successors, (1161), 4 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:39:05,392 INFO L276 IsEmpty]: Start isEmpty. Operand 106903 states and 111332 transitions. [2021-12-06 19:39:05,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1260 [2021-12-06 19:39:05,429 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:39:05,430 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:39:05,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-06 19:39:05,430 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:39:05,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:39:05,431 INFO L85 PathProgramCache]: Analyzing trace with hash -2097451796, now seen corresponding path program 1 times [2021-12-06 19:39:05,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:39:05,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942584535] [2021-12-06 19:39:05,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:39:05,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:39:05,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:39:05,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2530 backedges. 2051 proven. 186 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2021-12-06 19:39:05,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:39:05,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942584535] [2021-12-06 19:39:05,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942584535] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:39:05,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341792832] [2021-12-06 19:39:05,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:39:05,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:39:05,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:39:05,809 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:39:05,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a4ee58-94d2-4d9c-b790-9a5359365310/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 19:39:06,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:39:06,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 1498 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 19:39:06,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:39:28,113 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((aux_mod_v_~a14~0_1246_37 Int)) (and (< aux_mod_v_~a14~0_1246_37 299909) (<= 0 aux_mod_v_~a14~0_1246_37) (or (exists ((aux_mod_aux_div_v_~a14~0_1246_37_70 Int) (aux_div_aux_div_v_~a14~0_1246_37_70 Int)) (let ((.cse0 (+ (div (+ (* aux_mod_aux_div_v_~a14~0_1246_37_70 2699181) (* aux_div_aux_div_v_~a14~0_1246_37_70 26991810) (- 26993430) (* aux_mod_v_~a14~0_1246_37 (- 24292620))) 10) 1))) (and (< aux_mod_aux_div_v_~a14~0_1246_37_70 10) (<= (+ (* 299909 aux_mod_aux_div_v_~a14~0_1246_37_70) (* 2999090 aux_div_aux_div_v_~a14~0_1246_37_70)) (+ (* 2699180 aux_mod_v_~a14~0_1246_37) 2999088)) (<= 0 aux_mod_aux_div_v_~a14~0_1246_37_70) (= (mod .cse0 5) 0) (not (= aux_mod_aux_div_v_~a14~0_1246_37_70 0)) (< (+ 7 (* 9 aux_mod_v_~a14~0_1246_37)) (+ (* 10 aux_div_aux_div_v_~a14~0_1246_37_70) aux_mod_aux_div_v_~a14~0_1246_37_70)) (<= (+ (div .cse0 5) 270001) c_~a14~0)))) (exists ((aux_div_aux_div_v_~a14~0_1246_37_70 Int)) (and (<= (+ 270002 (div (+ (* aux_mod_v_~a14~0_1246_37 (- 2429262)) (* aux_div_aux_div_v_~a14~0_1246_37_70 2699181) (- 2699343)) 5)) c_~a14~0) (<= (* 2999090 aux_div_aux_div_v_~a14~0_1246_37_70) (+ (* 2699180 aux_mod_v_~a14~0_1246_37) 2999088)) (< (+ 7 (* 9 aux_mod_v_~a14~0_1246_37)) (* 10 aux_div_aux_div_v_~a14~0_1246_37_70)) (= 0 (mod (+ (div (+ (* aux_div_aux_div_v_~a14~0_1246_37_70 26991810) (- 26993430) (* aux_mod_v_~a14~0_1246_37 (- 24292620))) 10) 1) 5)))) (exists ((aux_mod_aux_div_v_~a14~0_1246_37_70 Int) (aux_div_aux_div_v_~a14~0_1246_37_70 Int)) (let ((.cse2 (div (+ (* aux_mod_aux_div_v_~a14~0_1246_37_70 2699181) (* aux_div_aux_div_v_~a14~0_1246_37_70 26991810) (- 26993430) (* aux_mod_v_~a14~0_1246_37 (- 24292620))) 10))) (let ((.cse1 (+ .cse2 1))) (and (< aux_mod_aux_div_v_~a14~0_1246_37_70 10) (not (= (mod .cse1 5) 0)) (<= (+ (* 299909 aux_mod_aux_div_v_~a14~0_1246_37_70) (* 2999090 aux_div_aux_div_v_~a14~0_1246_37_70)) (+ (* 2699180 aux_mod_v_~a14~0_1246_37) 2999088)) (<= 0 aux_mod_aux_div_v_~a14~0_1246_37_70) (not (= aux_mod_aux_div_v_~a14~0_1246_37_70 0)) (<= (+ (div .cse1 5) 270002) c_~a14~0) (< (+ 7 (* 9 aux_mod_v_~a14~0_1246_37)) (+ (* 10 aux_div_aux_div_v_~a14~0_1246_37_70) aux_mod_aux_div_v_~a14~0_1246_37_70)) (not (= (mod .cse2 5) 0)))))) (exists ((aux_div_aux_div_v_~a14~0_1246_37_70 Int)) (let ((.cse3 (div (+ (* aux_div_aux_div_v_~a14~0_1246_37_70 26991810) (- 26993430) (* aux_mod_v_~a14~0_1246_37 (- 24292620))) 10))) (and (<= (+ 270002 (div (+ (* aux_mod_v_~a14~0_1246_37 (- 2429262)) (* aux_div_aux_div_v_~a14~0_1246_37_70 2699181) (- 2699343)) 5)) c_~a14~0) (<= (* 2999090 aux_div_aux_div_v_~a14~0_1246_37_70) (+ (* 2699180 aux_mod_v_~a14~0_1246_37) 2999088)) (not (= (mod .cse3 5) 0)) (< (+ 7 (* 9 aux_mod_v_~a14~0_1246_37)) (* 10 aux_div_aux_div_v_~a14~0_1246_37_70)) (not (= 0 (mod (+ .cse3 1) 5)))))) (exists ((aux_mod_aux_div_v_~a14~0_1246_37_70 Int) (aux_div_aux_div_v_~a14~0_1246_37_70 Int)) (let ((.cse4 (div (+ (* aux_mod_aux_div_v_~a14~0_1246_37_70 2699181) (* aux_div_aux_div_v_~a14~0_1246_37_70 26991810) (- 26993430) (* aux_mod_v_~a14~0_1246_37 (- 24292620))) 10))) (and (< aux_mod_aux_div_v_~a14~0_1246_37_70 10) (= (mod .cse4 5) 0) (<= (+ (* 299909 aux_mod_aux_div_v_~a14~0_1246_37_70) (* 2999090 aux_div_aux_div_v_~a14~0_1246_37_70)) (+ (* 2699180 aux_mod_v_~a14~0_1246_37) 2999088)) (<= 0 aux_mod_aux_div_v_~a14~0_1246_37_70) (not (= aux_mod_aux_div_v_~a14~0_1246_37_70 0)) (<= (+ (div (+ .cse4 1) 5) 270002) c_~a14~0) (< (+ 7 (* 9 aux_mod_v_~a14~0_1246_37)) (+ (* 10 aux_div_aux_div_v_~a14~0_1246_37_70) aux_mod_aux_div_v_~a14~0_1246_37_70))))) (exists ((aux_div_aux_div_v_~a14~0_1246_37_70 Int)) (and (<= (+ 270001 (div (+ (* aux_mod_v_~a14~0_1246_37 (- 2429262)) (* aux_div_aux_div_v_~a14~0_1246_37_70 2699181) (- 2699343)) 5)) c_~a14~0) (<= (* 2999090 aux_div_aux_div_v_~a14~0_1246_37_70) (+ (* 2699180 aux_mod_v_~a14~0_1246_37) 2999088)) (< (+ 7 (* 9 aux_mod_v_~a14~0_1246_37)) (* 10 aux_div_aux_div_v_~a14~0_1246_37_70)) (= (mod (div (+ (* aux_div_aux_div_v_~a14~0_1246_37_70 26991810) (- 26993430) (* aux_mod_v_~a14~0_1246_37 (- 24292620))) 10) 5) 0)))))) (< 210522 c_~a28~0)) is different from true