./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-with-pointer/system-with-recursion.i --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_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-with-pointer/system-with-recursion.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/bin/utaipan-eEHZpOm5b7 --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 74e63e86abbcab22438f70ee6d7d7ef12eaada509b0f0a56fb5cf815aaf53aab --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:48:45,609 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:48:45,611 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:48:45,671 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:48:45,672 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:48:45,676 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:48:45,679 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:48:45,683 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:48:45,686 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:48:45,694 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:48:45,695 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:48:45,696 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:48:45,697 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:48:45,700 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:48:45,703 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:48:45,709 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:48:45,712 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:48:45,713 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:48:45,715 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:48:45,720 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:48:45,724 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:48:45,728 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:48:45,730 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:48:45,736 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:48:45,742 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:48:45,743 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:48:45,743 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:48:45,746 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:48:45,746 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:48:45,748 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:48:45,749 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:48:45,750 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:48:45,752 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:48:45,753 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:48:45,754 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:48:45,755 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:48:45,755 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:48:45,756 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:48:45,756 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:48:45,757 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:48:45,758 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:48:45,758 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:48:45,805 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:48:45,805 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:48:45,805 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:48:45,806 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:48:45,806 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:48:45,807 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:48:45,807 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:48:45,807 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:48:45,807 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:48:45,808 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:48:45,808 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:48:45,808 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:48:45,808 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:48:45,808 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:48:45,809 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:48:45,809 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:48:45,809 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:48:45,809 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:48:45,810 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:48:45,810 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:48:45,811 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:48:45,811 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:48:45,811 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:48:45,811 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:48:45,812 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:48:45,812 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:48:45,812 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:48:45,812 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:48:45,812 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:48:45,813 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:48:45,813 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:48:45,813 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:48:45,813 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:48:45,814 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:48:45,814 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:48:45,814 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:48:45,814 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:48:45,815 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:48:45,815 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:48:45,815 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:48:45,815 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:48:45,816 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74e63e86abbcab22438f70ee6d7d7ef12eaada509b0f0a56fb5cf815aaf53aab [2021-11-25 18:48:46,087 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:48:46,128 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:48:46,131 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:48:46,132 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:48:46,134 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:48:46,135 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/recursive-with-pointer/system-with-recursion.i [2021-11-25 18:48:46,210 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/bin/utaipan-eEHZpOm5b7/data/d018ecbcc/1f86d8a4d8af4be585dedeaf12b3c8c0/FLAG2679b7695 [2021-11-25 18:48:46,723 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:48:46,723 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/sv-benchmarks/c/recursive-with-pointer/system-with-recursion.i [2021-11-25 18:48:46,742 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/bin/utaipan-eEHZpOm5b7/data/d018ecbcc/1f86d8a4d8af4be585dedeaf12b3c8c0/FLAG2679b7695 [2021-11-25 18:48:47,047 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/bin/utaipan-eEHZpOm5b7/data/d018ecbcc/1f86d8a4d8af4be585dedeaf12b3c8c0 [2021-11-25 18:48:47,052 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:48:47,054 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:48:47,057 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:48:47,058 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:48:47,061 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:48:47,062 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:48:47" (1/1) ... [2021-11-25 18:48:47,065 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6066586f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:48:47, skipping insertion in model container [2021-11-25 18:48:47,066 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:48:47" (1/1) ... [2021-11-25 18:48:47,072 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:48:47,116 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:48:47,527 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_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/sv-benchmarks/c/recursive-with-pointer/system-with-recursion.i[36399,36412] [2021-11-25 18:48:47,537 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:48:47,549 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:48:47,619 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_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/sv-benchmarks/c/recursive-with-pointer/system-with-recursion.i[36399,36412] [2021-11-25 18:48:47,640 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:48:47,693 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:48:47,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:48:47 WrapperNode [2021-11-25 18:48:47,694 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:48:47,695 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:48:47,695 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:48:47,695 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:48:47,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:48:47" (1/1) ... [2021-11-25 18:48:47,754 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:48:47" (1/1) ... [2021-11-25 18:48:47,798 INFO L137 Inliner]: procedures = 184, calls = 149, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 224 [2021-11-25 18:48:47,799 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:48:47,800 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:48:47,801 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:48:47,801 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:48:47,809 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:48:47" (1/1) ... [2021-11-25 18:48:47,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:48:47" (1/1) ... [2021-11-25 18:48:47,830 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:48:47" (1/1) ... [2021-11-25 18:48:47,833 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:48:47" (1/1) ... [2021-11-25 18:48:47,867 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:48:47" (1/1) ... [2021-11-25 18:48:47,881 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:48:47" (1/1) ... [2021-11-25 18:48:47,884 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:48:47" (1/1) ... [2021-11-25 18:48:47,889 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:48:47,897 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:48:47,897 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:48:47,898 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:48:47,899 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:48:47" (1/1) ... [2021-11-25 18:48:47,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:48:47,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:48:47,942 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:48:47,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:48:47,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 18:48:47,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-25 18:48:47,989 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-25 18:48:47,989 INFO L130 BoogieDeclarations]: Found specification of procedure event_precess [2021-11-25 18:48:47,989 INFO L138 BoogieDeclarations]: Found implementation of procedure event_precess [2021-11-25 18:48:47,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 18:48:47,989 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 18:48:47,989 INFO L130 BoogieDeclarations]: Found specification of procedure ASNull [2021-11-25 18:48:47,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ASNull [2021-11-25 18:48:47,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:48:47,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 18:48:47,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:48:47,990 INFO L130 BoogieDeclarations]: Found specification of procedure ASStart [2021-11-25 18:48:47,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ASStart [2021-11-25 18:48:47,991 INFO L130 BoogieDeclarations]: Found specification of procedure status_update [2021-11-25 18:48:47,991 INFO L138 BoogieDeclarations]: Found implementation of procedure status_update [2021-11-25 18:48:47,991 INFO L130 BoogieDeclarations]: Found specification of procedure message_send [2021-11-25 18:48:47,991 INFO L138 BoogieDeclarations]: Found implementation of procedure message_send [2021-11-25 18:48:47,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 18:48:47,991 INFO L130 BoogieDeclarations]: Found specification of procedure ASIdle [2021-11-25 18:48:47,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ASIdle [2021-11-25 18:48:47,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:48:47,992 INFO L130 BoogieDeclarations]: Found specification of procedure system_initialize [2021-11-25 18:48:47,992 INFO L138 BoogieDeclarations]: Found implementation of procedure system_initialize [2021-11-25 18:48:47,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:48:47,992 INFO L130 BoogieDeclarations]: Found specification of procedure ASStop [2021-11-25 18:48:47,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ASStop [2021-11-25 18:48:47,993 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-11-25 18:48:47,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:48:47,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:48:48,130 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:48:48,132 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:48:48,879 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:48:49,109 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:48:49,109 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 18:48:49,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:48:49 BoogieIcfgContainer [2021-11-25 18:48:49,116 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:48:49,118 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:48:49,118 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:48:49,121 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:48:49,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:48:47" (1/3) ... [2021-11-25 18:48:49,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e747bd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:48:49, skipping insertion in model container [2021-11-25 18:48:49,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:48:47" (2/3) ... [2021-11-25 18:48:49,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e747bd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:48:49, skipping insertion in model container [2021-11-25 18:48:49,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:48:49" (3/3) ... [2021-11-25 18:48:49,125 INFO L111 eAbstractionObserver]: Analyzing ICFG system-with-recursion.i [2021-11-25 18:48:49,131 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:48:49,132 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:48:49,186 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:48:49,192 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=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:48:49,193 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:48:49,214 INFO L276 IsEmpty]: Start isEmpty. Operand has 106 states, 66 states have (on average 1.2878787878787878) internal successors, (85), 67 states have internal predecessors, (85), 29 states have call successors, (29), 9 states have call predecessors, (29), 9 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-11-25 18:48:49,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-25 18:48:49,221 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:48:49,222 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:48:49,222 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:48:49,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:48:49,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1588735395, now seen corresponding path program 1 times [2021-11-25 18:48:49,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:48:49,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421521698] [2021-11-25 18:48:49,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:48:49,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:48:49,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:48:49,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:48:49,780 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:48:49,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421521698] [2021-11-25 18:48:49,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421521698] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:48:49,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:48:49,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 18:48:49,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569773710] [2021-11-25 18:48:49,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:48:49,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 18:48:49,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:48:49,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 18:48:49,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:48:49,843 INFO L87 Difference]: Start difference. First operand has 106 states, 66 states have (on average 1.2878787878787878) internal successors, (85), 67 states have internal predecessors, (85), 29 states have call successors, (29), 9 states have call predecessors, (29), 9 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:48:52,590 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:48:52,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:48:52,667 INFO L93 Difference]: Finished difference Result 228 states and 330 transitions. [2021-11-25 18:48:52,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 18:48:52,681 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-11-25 18:48:52,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:48:52,692 INFO L225 Difference]: With dead ends: 228 [2021-11-25 18:48:52,692 INFO L226 Difference]: Without dead ends: 109 [2021-11-25 18:48:52,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:48:52,724 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 27 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:48:52,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 744 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 229 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2021-11-25 18:48:52,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-25 18:48:52,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-11-25 18:48:52,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 69 states have (on average 1.289855072463768) internal successors, (89), 72 states have internal predecessors, (89), 30 states have call successors, (30), 10 states have call predecessors, (30), 9 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-25 18:48:52,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 145 transitions. [2021-11-25 18:48:52,790 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 145 transitions. Word has length 16 [2021-11-25 18:48:52,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:48:52,792 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 145 transitions. [2021-11-25 18:48:52,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:48:52,793 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 145 transitions. [2021-11-25 18:48:52,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-25 18:48:52,803 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:48:52,803 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] [2021-11-25 18:48:52,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:48:52,804 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:48:52,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:48:52,805 INFO L85 PathProgramCache]: Analyzing trace with hash 2009861074, now seen corresponding path program 1 times [2021-11-25 18:48:52,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:48:52,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174566494] [2021-11-25 18:48:52,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:48:52,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:48:52,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:48:54,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:48:54,511 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:48:54,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174566494] [2021-11-25 18:48:54,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174566494] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:48:54,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153456935] [2021-11-25 18:48:54,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:48:54,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:48:54,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:48:54,514 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:48:54,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:48:54,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:48:54,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-25 18:48:54,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:48:55,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:48:55,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-25 18:48:55,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:48:55,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 88 [2021-11-25 18:48:55,574 INFO L354 Elim1Store]: treesize reduction 96, result has 42.5 percent of original size [2021-11-25 18:48:55,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 96 treesize of output 148 [2021-11-25 18:48:55,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 55 [2021-11-25 18:48:55,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-11-25 18:48:55,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-11-25 18:48:55,700 INFO L354 Elim1Store]: treesize reduction 15, result has 48.3 percent of original size [2021-11-25 18:48:55,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 39 [2021-11-25 18:48:55,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 63 [2021-11-25 18:48:56,248 INFO L354 Elim1Store]: treesize reduction 26, result has 38.1 percent of original size [2021-11-25 18:48:56,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 30 [2021-11-25 18:48:56,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 11 [2021-11-25 18:48:56,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-25 18:48:56,746 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:48:56,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 55 [2021-11-25 18:48:56,844 INFO L354 Elim1Store]: treesize reduction 26, result has 38.1 percent of original size [2021-11-25 18:48:56,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 30 [2021-11-25 18:48:57,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:48:57,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:48:57,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:48:57,443 INFO L354 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2021-11-25 18:48:57,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 101 [2021-11-25 18:48:57,475 INFO L354 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2021-11-25 18:48:57,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 91 [2021-11-25 18:48:57,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-25 18:48:57,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 49 [2021-11-25 18:48:57,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-11-25 18:48:57,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:48:57,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:49:08,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153456935] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:49:08,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1555658407] [2021-11-25 18:49:08,554 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2021-11-25 18:49:08,554 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:49:08,560 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:49:08,563 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:49:08,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12] total 34 [2021-11-25 18:49:08,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65308122] [2021-11-25 18:49:08,564 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:49:08,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-25 18:49:08,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:49:08,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-25 18:49:08,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1347, Unknown=10, NotChecked=0, Total=1482 [2021-11-25 18:49:08,568 INFO L87 Difference]: Start difference. First operand 109 states and 145 transitions. Second operand has 34 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 12 states have call successors, (14), 13 states have call predecessors, (14), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 18:49:15,305 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:49:19,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:49:19,808 INFO L93 Difference]: Finished difference Result 463 states and 642 transitions. [2021-11-25 18:49:19,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-25 18:49:19,809 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 12 states have call successors, (14), 13 states have call predecessors, (14), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2021-11-25 18:49:19,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:49:19,814 INFO L225 Difference]: With dead ends: 463 [2021-11-25 18:49:19,814 INFO L226 Difference]: Without dead ends: 220 [2021-11-25 18:49:19,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=682, Invalid=4710, Unknown=10, NotChecked=0, Total=5402 [2021-11-25 18:49:19,820 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 381 mSDsluCounter, 3540 mSDsCounter, 0 mSdLazyCounter, 4455 mSolverCounterSat, 240 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 3154 SdHoareTripleChecker+Invalid, 4696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 4455 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:49:19,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 3154 Invalid, 4696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 4455 Invalid, 1 Unknown, 0 Unchecked, 9.6s Time] [2021-11-25 18:49:19,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-11-25 18:49:19,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 175. [2021-11-25 18:49:19,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 109 states have (on average 1.2477064220183487) internal successors, (136), 115 states have internal predecessors, (136), 53 states have call successors, (53), 21 states have call predecessors, (53), 12 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2021-11-25 18:49:19,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 228 transitions. [2021-11-25 18:49:19,853 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 228 transitions. Word has length 29 [2021-11-25 18:49:19,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:49:19,853 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 228 transitions. [2021-11-25 18:49:19,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 12 states have call successors, (14), 13 states have call predecessors, (14), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 18:49:19,854 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 228 transitions. [2021-11-25 18:49:19,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-25 18:49:19,856 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:49:19,856 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:49:19,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:49:20,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:49:20,073 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:49:20,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:49:20,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1966949727, now seen corresponding path program 1 times [2021-11-25 18:49:20,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:49:20,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155997480] [2021-11-25 18:49:20,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:49:20,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:49:20,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:49:20,436 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 18:49:20,436 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:49:20,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155997480] [2021-11-25 18:49:20,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155997480] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:49:20,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:49:20,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 18:49:20,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223225902] [2021-11-25 18:49:20,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:49:20,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 18:49:20,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:49:20,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 18:49:20,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:49:20,444 INFO L87 Difference]: Start difference. First operand 175 states and 228 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:49:23,341 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:49:23,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:49:23,685 INFO L93 Difference]: Finished difference Result 367 states and 509 transitions. [2021-11-25 18:49:23,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 18:49:23,687 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2021-11-25 18:49:23,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:49:23,695 INFO L225 Difference]: With dead ends: 367 [2021-11-25 18:49:23,696 INFO L226 Difference]: Without dead ends: 205 [2021-11-25 18:49:23,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:49:23,701 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 34 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:49:23,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 786 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 239 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2021-11-25 18:49:23,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-11-25 18:49:23,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 198. [2021-11-25 18:49:23,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 126 states have (on average 1.2619047619047619) internal successors, (159), 133 states have internal predecessors, (159), 56 states have call successors, (56), 23 states have call predecessors, (56), 15 states have return successors, (44), 41 states have call predecessors, (44), 42 states have call successors, (44) [2021-11-25 18:49:23,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 259 transitions. [2021-11-25 18:49:23,754 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 259 transitions. Word has length 44 [2021-11-25 18:49:23,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:49:23,755 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 259 transitions. [2021-11-25 18:49:23,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:49:23,755 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 259 transitions. [2021-11-25 18:49:23,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-25 18:49:23,765 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:49:23,766 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:49:23,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 18:49:23,769 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:49:23,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:49:23,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1829694866, now seen corresponding path program 1 times [2021-11-25 18:49:23,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:49:23,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916300578] [2021-11-25 18:49:23,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:49:23,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:49:23,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:49:24,023 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 18:49:24,028 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:49:24,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916300578] [2021-11-25 18:49:24,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916300578] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:49:24,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:49:24,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:49:24,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034721198] [2021-11-25 18:49:24,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:49:24,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:49:24,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:49:24,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:49:24,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:49:24,031 INFO L87 Difference]: Start difference. First operand 198 states and 259 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-25 18:49:26,426 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:49:26,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:49:26,552 INFO L93 Difference]: Finished difference Result 395 states and 548 transitions. [2021-11-25 18:49:26,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:49:26,553 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2021-11-25 18:49:26,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:49:26,556 INFO L225 Difference]: With dead ends: 395 [2021-11-25 18:49:26,556 INFO L226 Difference]: Without dead ends: 210 [2021-11-25 18:49:26,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:49:26,559 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 3 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:49:26,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 456 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-25 18:49:26,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-25 18:49:26,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 204. [2021-11-25 18:49:26,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 131 states have (on average 1.251908396946565) internal successors, (164), 137 states have internal predecessors, (164), 56 states have call successors, (56), 23 states have call predecessors, (56), 16 states have return successors, (50), 43 states have call predecessors, (50), 42 states have call successors, (50) [2021-11-25 18:49:26,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 270 transitions. [2021-11-25 18:49:26,584 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 270 transitions. Word has length 48 [2021-11-25 18:49:26,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:49:26,585 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 270 transitions. [2021-11-25 18:49:26,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-25 18:49:26,585 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 270 transitions. [2021-11-25 18:49:26,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-25 18:49:26,587 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:49:26,587 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:49:26,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 18:49:26,587 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:49:26,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:49:26,588 INFO L85 PathProgramCache]: Analyzing trace with hash 516321036, now seen corresponding path program 1 times [2021-11-25 18:49:26,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:49:26,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771778279] [2021-11-25 18:49:26,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:49:26,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:49:26,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:49:26,805 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 18:49:26,806 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:49:26,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771778279] [2021-11-25 18:49:26,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771778279] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:49:26,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:49:26,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:49:26,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894488785] [2021-11-25 18:49:26,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:49:26,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:49:26,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:49:26,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:49:26,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:49:26,809 INFO L87 Difference]: Start difference. First operand 204 states and 270 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-25 18:49:29,186 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:49:29,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:49:29,310 INFO L93 Difference]: Finished difference Result 405 states and 563 transitions. [2021-11-25 18:49:29,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:49:29,310 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2021-11-25 18:49:29,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:49:29,314 INFO L225 Difference]: With dead ends: 405 [2021-11-25 18:49:29,314 INFO L226 Difference]: Without dead ends: 214 [2021-11-25 18:49:29,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:49:29,316 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 3 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:49:29,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 455 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-25 18:49:29,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-11-25 18:49:29,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 208. [2021-11-25 18:49:29,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 135 states have (on average 1.2444444444444445) internal successors, (168), 139 states have internal predecessors, (168), 56 states have call successors, (56), 23 states have call predecessors, (56), 16 states have return successors, (50), 45 states have call predecessors, (50), 42 states have call successors, (50) [2021-11-25 18:49:29,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 274 transitions. [2021-11-25 18:49:29,345 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 274 transitions. Word has length 49 [2021-11-25 18:49:29,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:49:29,345 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 274 transitions. [2021-11-25 18:49:29,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-25 18:49:29,346 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 274 transitions. [2021-11-25 18:49:29,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-25 18:49:29,348 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:49:29,348 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-25 18:49:29,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 18:49:29,349 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:49:29,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:49:29,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1543435287, now seen corresponding path program 1 times [2021-11-25 18:49:29,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:49:29,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003462854] [2021-11-25 18:49:29,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:49:29,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:49:29,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:49:29,581 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:49:29,581 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:49:29,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003462854] [2021-11-25 18:49:29,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003462854] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:49:29,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:49:29,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 18:49:29,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350201556] [2021-11-25 18:49:29,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:49:29,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:49:29,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:49:29,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:49:29,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:49:29,586 INFO L87 Difference]: Start difference. First operand 208 states and 274 transitions. Second operand has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-25 18:49:32,632 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:49:32,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:49:32,888 INFO L93 Difference]: Finished difference Result 437 states and 612 transitions. [2021-11-25 18:49:32,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 18:49:32,889 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 52 [2021-11-25 18:49:32,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:49:32,892 INFO L225 Difference]: With dead ends: 437 [2021-11-25 18:49:32,892 INFO L226 Difference]: Without dead ends: 242 [2021-11-25 18:49:32,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:49:32,894 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 32 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:49:32,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 696 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 217 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2021-11-25 18:49:32,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-11-25 18:49:32,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 230. [2021-11-25 18:49:32,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 152 states have (on average 1.269736842105263) internal successors, (193), 157 states have internal predecessors, (193), 60 states have call successors, (60), 27 states have call predecessors, (60), 17 states have return successors, (53), 45 states have call predecessors, (53), 44 states have call successors, (53) [2021-11-25 18:49:32,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 306 transitions. [2021-11-25 18:49:32,915 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 306 transitions. Word has length 52 [2021-11-25 18:49:32,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:49:32,916 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 306 transitions. [2021-11-25 18:49:32,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-25 18:49:32,916 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 306 transitions. [2021-11-25 18:49:32,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-25 18:49:32,918 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:49:32,918 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-25 18:49:32,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 18:49:32,919 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:49:32,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:49:32,919 INFO L85 PathProgramCache]: Analyzing trace with hash 932545388, now seen corresponding path program 1 times [2021-11-25 18:49:32,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:49:32,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611527334] [2021-11-25 18:49:32,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:49:32,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:49:33,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:49:33,239 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:49:33,240 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:49:33,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611527334] [2021-11-25 18:49:33,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611527334] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:49:33,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:49:33,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 18:49:33,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735638444] [2021-11-25 18:49:33,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:49:33,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 18:49:33,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:49:33,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 18:49:33,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:49:33,242 INFO L87 Difference]: Start difference. First operand 230 states and 306 transitions. Second operand has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-25 18:49:36,096 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:49:36,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:49:36,398 INFO L93 Difference]: Finished difference Result 498 states and 699 transitions. [2021-11-25 18:49:36,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 18:49:36,398 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 53 [2021-11-25 18:49:36,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:49:36,402 INFO L225 Difference]: With dead ends: 498 [2021-11-25 18:49:36,402 INFO L226 Difference]: Without dead ends: 281 [2021-11-25 18:49:36,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:49:36,405 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 36 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:49:36,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 869 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 270 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2021-11-25 18:49:36,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-11-25 18:49:36,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 264. [2021-11-25 18:49:36,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 177 states have (on average 1.2824858757062148) internal successors, (227), 184 states have internal predecessors, (227), 66 states have call successors, (66), 31 states have call predecessors, (66), 20 states have return successors, (59), 48 states have call predecessors, (59), 48 states have call successors, (59) [2021-11-25 18:49:36,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 352 transitions. [2021-11-25 18:49:36,427 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 352 transitions. Word has length 53 [2021-11-25 18:49:36,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:49:36,428 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 352 transitions. [2021-11-25 18:49:36,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-25 18:49:36,428 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 352 transitions. [2021-11-25 18:49:36,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-25 18:49:36,430 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:49:36,431 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:49:36,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 18:49:36,431 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:49:36,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:49:36,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1730045334, now seen corresponding path program 2 times [2021-11-25 18:49:36,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:49:36,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332842198] [2021-11-25 18:49:36,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:49:36,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:49:36,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:49:36,678 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:49:36,679 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:49:36,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332842198] [2021-11-25 18:49:36,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332842198] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:49:36,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:49:36,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 18:49:36,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003541761] [2021-11-25 18:49:36,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:49:36,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:49:36,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:49:36,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:49:36,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:49:36,681 INFO L87 Difference]: Start difference. First operand 264 states and 352 transitions. Second operand has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 4 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 18:49:39,431 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:49:41,447 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:49:43,463 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:49:45,468 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:49:47,479 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:49:49,493 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:49:49,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:49:49,695 INFO L93 Difference]: Finished difference Result 532 states and 739 transitions. [2021-11-25 18:49:49,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 18:49:49,695 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 4 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2021-11-25 18:49:49,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:49:49,698 INFO L225 Difference]: With dead ends: 532 [2021-11-25 18:49:49,698 INFO L226 Difference]: Without dead ends: 281 [2021-11-25 18:49:49,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:49:49,701 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 32 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 3 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:49:49,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 653 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 201 Invalid, 5 Unknown, 0 Unchecked, 13.0s Time] [2021-11-25 18:49:49,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-11-25 18:49:49,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 270. [2021-11-25 18:49:49,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 181 states have (on average 1.276243093922652) internal successors, (231), 188 states have internal predecessors, (231), 67 states have call successors, (67), 32 states have call predecessors, (67), 21 states have return successors, (60), 49 states have call predecessors, (60), 49 states have call successors, (60) [2021-11-25 18:49:49,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 358 transitions. [2021-11-25 18:49:49,722 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 358 transitions. Word has length 57 [2021-11-25 18:49:49,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:49:49,722 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 358 transitions. [2021-11-25 18:49:49,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 4 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 18:49:49,722 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 358 transitions. [2021-11-25 18:49:49,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-25 18:49:49,724 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:49:49,724 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:49:49,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 18:49:49,725 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:49:49,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:49:49,725 INFO L85 PathProgramCache]: Analyzing trace with hash -470061658, now seen corresponding path program 1 times [2021-11-25 18:49:49,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:49:49,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277107470] [2021-11-25 18:49:49,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:49:49,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:49:49,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:49:49,948 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:49:49,948 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:49:49,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277107470] [2021-11-25 18:49:49,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277107470] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:49:49,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483549505] [2021-11-25 18:49:49,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:49:49,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:49:49,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:49:49,955 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:49:49,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:49:50,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:49:50,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 1096 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 18:49:50,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:49:50,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:49:50,563 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:49:50,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:49:50,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:49:50,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:49:50,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:49:50,795 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:49:50,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483549505] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:49:50,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [851089157] [2021-11-25 18:49:50,799 INFO L159 IcfgInterpreter]: Started Sifa with 45 locations of interest [2021-11-25 18:49:50,799 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:49:50,800 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:49:50,804 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:49:50,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-11-25 18:49:50,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829955348] [2021-11-25 18:49:50,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:49:50,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 18:49:50,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:49:50,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 18:49:50,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-25 18:49:50,807 INFO L87 Difference]: Start difference. First operand 270 states and 358 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 4 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-25 18:49:52,911 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:49:54,925 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:49:56,432 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:49:58,449 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:50:00,456 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:50:00,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:50:00,811 INFO L93 Difference]: Finished difference Result 603 states and 850 transitions. [2021-11-25 18:50:00,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:50:00,812 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 4 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) Word has length 55 [2021-11-25 18:50:00,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:50:00,815 INFO L225 Difference]: With dead ends: 603 [2021-11-25 18:50:00,816 INFO L226 Difference]: Without dead ends: 340 [2021-11-25 18:50:00,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:50:00,818 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 95 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 42 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2021-11-25 18:50:00,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 670 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 254 Invalid, 3 Unknown, 0 Unchecked, 9.9s Time] [2021-11-25 18:50:00,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-11-25 18:50:00,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 324. [2021-11-25 18:50:00,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 218 states have (on average 1.238532110091743) internal successors, (270), 223 states have internal predecessors, (270), 70 states have call successors, (70), 33 states have call predecessors, (70), 35 states have return successors, (107), 67 states have call predecessors, (107), 52 states have call successors, (107) [2021-11-25 18:50:00,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 447 transitions. [2021-11-25 18:50:00,844 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 447 transitions. Word has length 55 [2021-11-25 18:50:00,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:50:00,844 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 447 transitions. [2021-11-25 18:50:00,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 4 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-25 18:50:00,845 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 447 transitions. [2021-11-25 18:50:00,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-25 18:50:00,847 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:50:00,847 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-25 18:50:00,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-25 18:50:01,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:50:01,071 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:50:01,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:50:01,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1197967254, now seen corresponding path program 1 times [2021-11-25 18:50:01,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:50:01,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662798391] [2021-11-25 18:50:01,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:50:01,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:50:01,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:50:01,615 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:50:01,616 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:50:01,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662798391] [2021-11-25 18:50:01,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662798391] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:50:01,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110918233] [2021-11-25 18:50:01,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:50:01,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:50:01,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:50:01,618 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:50:01,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:50:02,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:50:02,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 1133 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 18:50:02,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:50:02,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:50:02,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-25 18:50:02,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:50:02,541 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:50:02,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:50:03,543 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-25 18:50:03,609 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-25 18:50:03,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110918233] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-25 18:50:03,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:50:03,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 10] total 18 [2021-11-25 18:50:03,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373210205] [2021-11-25 18:50:03,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:50:03,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:50:03,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:50:03,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:50:03,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-11-25 18:50:03,611 INFO L87 Difference]: Start difference. First operand 324 states and 447 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-25 18:50:05,444 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:50:07,458 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:50:09,468 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:50:11,476 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:50:11,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:50:11,894 INFO L93 Difference]: Finished difference Result 824 states and 1227 transitions. [2021-11-25 18:50:11,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:50:11,894 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 59 [2021-11-25 18:50:11,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:50:11,899 INFO L225 Difference]: With dead ends: 824 [2021-11-25 18:50:11,900 INFO L226 Difference]: Without dead ends: 513 [2021-11-25 18:50:11,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-11-25 18:50:11,903 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 104 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 26 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:50:11,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 675 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 269 Invalid, 3 Unknown, 0 Unchecked, 8.2s Time] [2021-11-25 18:50:11,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-11-25 18:50:11,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 479. [2021-11-25 18:50:11,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 331 states have (on average 1.2175226586102719) internal successors, (403), 318 states have internal predecessors, (403), 87 states have call successors, (87), 42 states have call predecessors, (87), 60 states have return successors, (189), 118 states have call predecessors, (189), 65 states have call successors, (189) [2021-11-25 18:50:11,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 679 transitions. [2021-11-25 18:50:11,940 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 679 transitions. Word has length 59 [2021-11-25 18:50:11,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:50:11,941 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 679 transitions. [2021-11-25 18:50:11,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-25 18:50:11,941 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 679 transitions. [2021-11-25 18:50:11,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-25 18:50:11,943 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:50:11,943 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 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] [2021-11-25 18:50:11,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:50:12,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 18:50:12,159 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:50:12,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:50:12,160 INFO L85 PathProgramCache]: Analyzing trace with hash -400297083, now seen corresponding path program 1 times [2021-11-25 18:50:12,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:50:12,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130940597] [2021-11-25 18:50:12,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:50:12,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:50:12,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:50:12,434 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:50:12,434 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:50:12,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130940597] [2021-11-25 18:50:12,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130940597] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:50:12,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:50:12,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 18:50:12,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339221878] [2021-11-25 18:50:12,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:50:12,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:50:12,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:50:12,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:50:12,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:50:12,437 INFO L87 Difference]: Start difference. First operand 479 states and 679 transitions. Second operand has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 4 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 18:50:15,134 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:50:15,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:50:15,410 INFO L93 Difference]: Finished difference Result 965 states and 1511 transitions. [2021-11-25 18:50:15,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 18:50:15,411 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 4 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 60 [2021-11-25 18:50:15,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:50:15,418 INFO L225 Difference]: With dead ends: 965 [2021-11-25 18:50:15,418 INFO L226 Difference]: Without dead ends: 499 [2021-11-25 18:50:15,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:50:15,423 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 31 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-25 18:50:15,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 649 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 212 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2021-11-25 18:50:15,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-11-25 18:50:15,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 489. [2021-11-25 18:50:15,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 339 states have (on average 1.2212389380530972) internal successors, (414), 326 states have internal predecessors, (414), 88 states have call successors, (88), 43 states have call predecessors, (88), 61 states have return successors, (194), 119 states have call predecessors, (194), 66 states have call successors, (194) [2021-11-25 18:50:15,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 696 transitions. [2021-11-25 18:50:15,486 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 696 transitions. Word has length 60 [2021-11-25 18:50:15,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:50:15,486 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 696 transitions. [2021-11-25 18:50:15,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 4 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 18:50:15,487 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 696 transitions. [2021-11-25 18:50:15,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-25 18:50:15,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:50:15,489 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:50:15,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 18:50:15,492 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:50:15,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:50:15,493 INFO L85 PathProgramCache]: Analyzing trace with hash 680771221, now seen corresponding path program 1 times [2021-11-25 18:50:15,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:50:15,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835312599] [2021-11-25 18:50:15,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:50:15,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:50:15,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:50:15,706 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:50:15,707 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:50:15,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835312599] [2021-11-25 18:50:15,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835312599] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:50:15,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:50:15,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 18:50:15,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33644426] [2021-11-25 18:50:15,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:50:15,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 18:50:15,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:50:15,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 18:50:15,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:50:15,709 INFO L87 Difference]: Start difference. First operand 489 states and 696 transitions. Second operand has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 4 states have call successors, (14), 4 states have call predecessors, (14), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 18:50:19,557 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:50:21,569 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:50:24,170 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:50:26,184 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:50:28,022 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:50:28,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:50:28,353 INFO L93 Difference]: Finished difference Result 981 states and 1531 transitions. [2021-11-25 18:50:28,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 18:50:28,354 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 4 states have call successors, (14), 4 states have call predecessors, (14), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 60 [2021-11-25 18:50:28,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:50:28,360 INFO L225 Difference]: With dead ends: 981 [2021-11-25 18:50:28,360 INFO L226 Difference]: Without dead ends: 505 [2021-11-25 18:50:28,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:50:28,365 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 49 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 8 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:50:28,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 769 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 233 Invalid, 3 Unknown, 0 Unchecked, 12.6s Time] [2021-11-25 18:50:28,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-11-25 18:50:28,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 494. [2021-11-25 18:50:28,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 342 states have (on average 1.2163742690058479) internal successors, (416), 331 states have internal predecessors, (416), 88 states have call successors, (88), 43 states have call predecessors, (88), 63 states have return successors, (192), 119 states have call predecessors, (192), 66 states have call successors, (192) [2021-11-25 18:50:28,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 696 transitions. [2021-11-25 18:50:28,403 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 696 transitions. Word has length 60 [2021-11-25 18:50:28,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:50:28,403 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 696 transitions. [2021-11-25 18:50:28,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 4 states have call successors, (14), 4 states have call predecessors, (14), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 18:50:28,404 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 696 transitions. [2021-11-25 18:50:28,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-25 18:50:28,409 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:50:28,409 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:50:28,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 18:50:28,410 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:50:28,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:50:28,410 INFO L85 PathProgramCache]: Analyzing trace with hash -643635002, now seen corresponding path program 1 times [2021-11-25 18:50:28,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:50:28,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270163113] [2021-11-25 18:50:28,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:50:28,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:50:28,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:50:28,674 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:50:28,674 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:50:28,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270163113] [2021-11-25 18:50:28,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270163113] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:50:28,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693828294] [2021-11-25 18:50:28,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:50:28,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:50:28,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:50:28,679 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:50:28,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:50:29,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:50:29,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 1105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 18:50:29,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:50:29,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-25 18:50:29,592 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:50:29,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:50:29,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-11-25 18:50:29,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-11-25 18:50:29,955 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:50:29,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693828294] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:50:29,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [190407280] [2021-11-25 18:50:29,959 INFO L159 IcfgInterpreter]: Started Sifa with 46 locations of interest [2021-11-25 18:50:29,959 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:50:29,960 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:50:29,963 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:50:29,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2021-11-25 18:50:29,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963311352] [2021-11-25 18:50:29,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:50:29,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 18:50:29,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:50:29,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 18:50:29,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:50:29,969 INFO L87 Difference]: Start difference. First operand 494 states and 696 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-25 18:50:32,675 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:50:33,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:50:33,359 INFO L93 Difference]: Finished difference Result 1236 states and 2032 transitions. [2021-11-25 18:50:33,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 18:50:33,360 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 59 [2021-11-25 18:50:33,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:50:33,368 INFO L225 Difference]: With dead ends: 1236 [2021-11-25 18:50:33,368 INFO L226 Difference]: Without dead ends: 755 [2021-11-25 18:50:33,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-11-25 18:50:33,374 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 209 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 142 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:50:33,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 695 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 379 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2021-11-25 18:50:33,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-11-25 18:50:33,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 586. [2021-11-25 18:50:33,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 412 states have (on average 1.2014563106796117) internal successors, (495), 389 states have internal predecessors, (495), 93 states have call successors, (93), 46 states have call predecessors, (93), 80 states have return successors, (293), 150 states have call predecessors, (293), 71 states have call successors, (293) [2021-11-25 18:50:33,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 881 transitions. [2021-11-25 18:50:33,432 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 881 transitions. Word has length 59 [2021-11-25 18:50:33,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:50:33,433 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 881 transitions. [2021-11-25 18:50:33,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-25 18:50:33,433 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 881 transitions. [2021-11-25 18:50:33,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-25 18:50:33,435 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:50:33,436 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-25 18:50:33,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:50:33,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:50:33,651 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:50:33,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:50:33,652 INFO L85 PathProgramCache]: Analyzing trace with hash -624139789, now seen corresponding path program 1 times [2021-11-25 18:50:33,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:50:33,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812900135] [2021-11-25 18:50:33,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:50:33,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:50:33,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:50:33,920 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:50:33,921 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:50:33,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812900135] [2021-11-25 18:50:33,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812900135] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:50:33,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023464495] [2021-11-25 18:50:33,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:50:33,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:50:33,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:50:33,923 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:50:33,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:50:34,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:50:34,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 1129 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 18:50:34,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:50:34,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:50:34,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:50:34,861 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:50:34,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:50:34,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-25 18:50:35,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-25 18:50:35,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-25 18:50:35,246 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:50:35,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023464495] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:50:35,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1121866766] [2021-11-25 18:50:35,250 INFO L159 IcfgInterpreter]: Started Sifa with 49 locations of interest [2021-11-25 18:50:35,250 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:50:35,251 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:50:35,251 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:50:35,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2021-11-25 18:50:35,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733462626] [2021-11-25 18:50:35,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:50:35,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-25 18:50:35,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:50:35,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-25 18:50:35,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-11-25 18:50:35,253 INFO L87 Difference]: Start difference. First operand 586 states and 881 transitions. Second operand has 16 states, 16 states have (on average 4.4375) internal successors, (71), 16 states have internal predecessors, (71), 5 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-25 18:50:38,071 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:50:39,944 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:50:41,960 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:50:43,968 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:50:45,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:50:45,099 INFO L93 Difference]: Finished difference Result 1756 states and 3584 transitions. [2021-11-25 18:50:45,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-25 18:50:45,099 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 16 states have internal predecessors, (71), 5 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 63 [2021-11-25 18:50:45,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:50:45,114 INFO L225 Difference]: With dead ends: 1756 [2021-11-25 18:50:45,115 INFO L226 Difference]: Without dead ends: 1183 [2021-11-25 18:50:45,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2021-11-25 18:50:45,123 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 391 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 325 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:50:45,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 1055 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 853 Invalid, 2 Unknown, 0 Unchecked, 9.5s Time] [2021-11-25 18:50:45,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2021-11-25 18:50:45,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 1017. [2021-11-25 18:50:45,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 723 states have (on average 1.1396957123098201) internal successors, (824), 696 states have internal predecessors, (824), 106 states have call successors, (106), 51 states have call predecessors, (106), 187 states have return successors, (1016), 269 states have call predecessors, (1016), 82 states have call successors, (1016) [2021-11-25 18:50:45,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 1946 transitions. [2021-11-25 18:50:45,252 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 1946 transitions. Word has length 63 [2021-11-25 18:50:45,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:50:45,252 INFO L470 AbstractCegarLoop]: Abstraction has 1017 states and 1946 transitions. [2021-11-25 18:50:45,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 16 states have internal predecessors, (71), 5 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-25 18:50:45,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 1946 transitions. [2021-11-25 18:50:45,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-25 18:50:45,259 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:50:45,259 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 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] [2021-11-25 18:50:45,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:50:45,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 18:50:45,511 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:50:45,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:50:45,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1611785923, now seen corresponding path program 1 times [2021-11-25 18:50:45,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:50:45,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206949706] [2021-11-25 18:50:45,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:50:45,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:50:45,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:50:45,795 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-25 18:50:45,795 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:50:45,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206949706] [2021-11-25 18:50:45,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206949706] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:50:45,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:50:45,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-25 18:50:45,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203517100] [2021-11-25 18:50:45,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:50:45,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 18:50:45,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:50:45,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 18:50:45,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:50:45,798 INFO L87 Difference]: Start difference. First operand 1017 states and 1946 transitions. Second operand has 11 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (7), 4 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-25 18:50:49,285 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:50:49,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:50:49,580 INFO L93 Difference]: Finished difference Result 2050 states and 4832 transitions. [2021-11-25 18:50:49,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 18:50:49,580 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (7), 4 states have call predecessors, (7), 1 states have call successors, (7) Word has length 82 [2021-11-25 18:50:49,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:50:49,596 INFO L225 Difference]: With dead ends: 2050 [2021-11-25 18:50:49,596 INFO L226 Difference]: Without dead ends: 1046 [2021-11-25 18:50:49,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-25 18:50:49,612 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 11 mSDsluCounter, 1231 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 1219 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:50:49,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 1219 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 231 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2021-11-25 18:50:49,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2021-11-25 18:50:49,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 1020. [2021-11-25 18:50:49,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1020 states, 725 states have (on average 1.1393103448275863) internal successors, (826), 698 states have internal predecessors, (826), 106 states have call successors, (106), 51 states have call predecessors, (106), 188 states have return successors, (1022), 270 states have call predecessors, (1022), 82 states have call successors, (1022) [2021-11-25 18:50:49,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 1954 transitions. [2021-11-25 18:50:49,741 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 1954 transitions. Word has length 82 [2021-11-25 18:50:49,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:50:49,741 INFO L470 AbstractCegarLoop]: Abstraction has 1020 states and 1954 transitions. [2021-11-25 18:50:49,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (7), 4 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-25 18:50:49,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 1954 transitions. [2021-11-25 18:50:49,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-25 18:50:49,746 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:50:49,746 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:50:49,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-25 18:50:49,747 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:50:49,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:50:49,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1262292988, now seen corresponding path program 1 times [2021-11-25 18:50:49,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:50:49,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037450738] [2021-11-25 18:50:49,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:50:49,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:50:49,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:50:49,949 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:50:49,950 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:50:49,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037450738] [2021-11-25 18:50:49,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037450738] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:50:49,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:50:49,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-25 18:50:49,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572104302] [2021-11-25 18:50:49,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:50:49,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 18:50:49,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:50:49,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 18:50:49,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:50:49,951 INFO L87 Difference]: Start difference. First operand 1020 states and 1954 transitions. Second operand has 11 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (6), 4 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 18:50:53,240 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:50:54,920 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:50:56,933 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:50:58,062 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:50:59,413 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:51:01,022 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:51:03,034 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:51:04,568 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:51:06,303 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:51:06,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:51:06,557 INFO L93 Difference]: Finished difference Result 2053 states and 4840 transitions. [2021-11-25 18:51:06,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 18:51:06,558 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (6), 4 states have call predecessors, (6), 1 states have call successors, (6) Word has length 66 [2021-11-25 18:51:06,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:51:06,571 INFO L225 Difference]: With dead ends: 2053 [2021-11-25 18:51:06,571 INFO L226 Difference]: Without dead ends: 1046 [2021-11-25 18:51:06,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-25 18:51:06,584 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 11 mSDsluCounter, 1240 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 1219 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:51:06,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 1219 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 239 Invalid, 2 Unknown, 0 Unchecked, 16.5s Time] [2021-11-25 18:51:06,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2021-11-25 18:51:06,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 1018. [2021-11-25 18:51:06,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 724 states have (on average 1.1395027624309393) internal successors, (825), 696 states have internal predecessors, (825), 106 states have call successors, (106), 51 states have call predecessors, (106), 187 states have return successors, (1016), 270 states have call predecessors, (1016), 82 states have call successors, (1016) [2021-11-25 18:51:06,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 1947 transitions. [2021-11-25 18:51:06,755 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 1947 transitions. Word has length 66 [2021-11-25 18:51:06,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:51:06,756 INFO L470 AbstractCegarLoop]: Abstraction has 1018 states and 1947 transitions. [2021-11-25 18:51:06,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (6), 4 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 18:51:06,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 1947 transitions. [2021-11-25 18:51:06,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-25 18:51:06,759 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:51:06,760 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2021-11-25 18:51:06,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-25 18:51:06,760 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:51:06,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:51:06,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1646938945, now seen corresponding path program 2 times [2021-11-25 18:51:06,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:51:06,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084565697] [2021-11-25 18:51:06,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:51:06,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:51:07,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:51:07,354 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 41 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:51:07,354 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:51:07,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084565697] [2021-11-25 18:51:07,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084565697] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:51:07,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942422986] [2021-11-25 18:51:07,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:51:07,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:51:07,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:51:07,356 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:51:07,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1d03203-33e5-4bf3-8a88-649ef7fc3e16/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 18:51:35,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 18:51:35,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:51:35,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 1052 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-25 18:51:35,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:51:36,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-11-25 18:51:36,130 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:51:36,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 97 [2021-11-25 18:51:36,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:36,217 INFO L354 Elim1Store]: treesize reduction 108, result has 52.8 percent of original size [2021-11-25 18:51:36,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 90 treesize of output 172 [2021-11-25 18:51:36,241 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:51:36,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 139 [2021-11-25 18:51:36,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:51:36,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 130 [2021-11-25 18:51:36,703 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-11-25 18:51:36,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 67 [2021-11-25 18:51:36,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-11-25 18:51:36,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 50 [2021-11-25 18:51:37,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:51:37,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:51:37,199 INFO L354 Elim1Store]: treesize reduction 23, result has 37.8 percent of original size [2021-11-25 18:51:37,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 45 [2021-11-25 18:51:39,194 INFO L354 Elim1Store]: treesize reduction 3, result has 78.6 percent of original size [2021-11-25 18:51:39,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2021-11-25 18:51:39,252 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-25 18:51:39,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:51:39,506 INFO L354 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2021-11-25 18:51:39,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 98 treesize of output 106 [2021-11-25 18:51:39,528 INFO L354 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2021-11-25 18:51:39,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 88 treesize of output 96 [2021-11-25 18:51:39,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-25 18:51:39,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-25 18:51:39,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-11-25 18:51:39,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9