./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V --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 ce176716d91d866602a372020396224af9fcf4c5f81c6adcdcc0f1d83b0d658f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:29:16,417 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:29:16,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:29:16,480 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:29:16,481 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:29:16,486 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:29:16,488 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:29:16,492 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:29:16,495 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:29:16,502 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:29:16,504 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:29:16,506 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:29:16,507 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:29:16,510 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:29:16,514 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:29:16,524 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:29:16,527 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:29:16,528 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:29:16,531 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:29:16,545 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:29:16,550 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:29:16,551 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:29:16,556 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:29:16,558 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:29:16,566 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:29:16,569 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:29:16,570 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:29:16,572 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:29:16,573 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:29:16,575 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:29:16,575 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:29:16,577 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:29:16,579 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:29:16,580 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:29:16,582 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:29:16,582 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:29:16,583 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:29:16,583 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:29:16,584 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:29:16,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:29:16,585 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:29:16,586 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:29:16,635 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:29:16,635 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:29:16,636 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:29:16,636 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:29:16,643 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:29:16,644 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:29:16,644 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:29:16,644 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:29:16,645 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:29:16,645 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:29:16,646 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:29:16,646 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:29:16,647 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:29:16,647 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:29:16,647 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:29:16,647 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:29:16,648 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:29:16,648 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:29:16,649 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:29:16,649 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:29:16,649 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:29:16,649 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:29:16,650 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:29:16,650 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:29:16,650 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:29:16,650 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:29:16,652 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:29:16,652 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:29:16,652 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:29:16,653 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:29:16,653 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:29:16,653 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:29:16,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:29:16,654 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:29:16,654 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:29:16,654 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:29:16,655 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:29:16,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:29:16,655 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:29:16,655 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:29:16,655 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:29:16,656 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_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce176716d91d866602a372020396224af9fcf4c5f81c6adcdcc0f1d83b0d658f [2021-11-23 02:29:16,930 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:29:16,953 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:29:16,956 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:29:16,957 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:29:16,958 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:29:16,959 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c [2021-11-23 02:29:17,090 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/data/367a3055b/7e51a1e61a0f43e8bd64f4c516949598/FLAG613b3d26e [2021-11-23 02:29:17,723 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:29:17,724 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c [2021-11-23 02:29:17,773 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/data/367a3055b/7e51a1e61a0f43e8bd64f4c516949598/FLAG613b3d26e [2021-11-23 02:29:17,952 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/data/367a3055b/7e51a1e61a0f43e8bd64f4c516949598 [2021-11-23 02:29:17,955 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:29:17,957 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:29:17,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:29:17,959 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:29:17,978 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:29:17,979 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:29:17" (1/1) ... [2021-11-23 02:29:17,980 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36f05e2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:29:17, skipping insertion in model container [2021-11-23 02:29:17,981 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:29:17" (1/1) ... [2021-11-23 02:29:17,988 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:29:18,040 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:29:18,245 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_48257a1a-2785-4bbb-bd4e-9932c1f414ea/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c[914,927] [2021-11-23 02:29:18,307 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_48257a1a-2785-4bbb-bd4e-9932c1f414ea/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c[7115,7128] [2021-11-23 02:29:18,448 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:29:18,471 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:29:18,486 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_48257a1a-2785-4bbb-bd4e-9932c1f414ea/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c[914,927] [2021-11-23 02:29:18,530 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_48257a1a-2785-4bbb-bd4e-9932c1f414ea/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c[7115,7128] [2021-11-23 02:29:18,622 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:29:18,679 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:29:18,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:29:18 WrapperNode [2021-11-23 02:29:18,680 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:29:18,681 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:29:18,682 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:29:18,682 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:29:18,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:29:18" (1/1) ... [2021-11-23 02:29:18,710 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:29:18" (1/1) ... [2021-11-23 02:29:18,831 INFO L137 Inliner]: procedures = 79, calls = 97, calls flagged for inlining = 47, calls inlined = 47, statements flattened = 1103 [2021-11-23 02:29:18,844 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:29:18,845 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:29:18,846 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:29:18,846 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:29:18,856 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:29:18" (1/1) ... [2021-11-23 02:29:18,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:29:18" (1/1) ... [2021-11-23 02:29:18,862 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:29:18" (1/1) ... [2021-11-23 02:29:18,863 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:29:18" (1/1) ... [2021-11-23 02:29:18,884 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:29:18" (1/1) ... [2021-11-23 02:29:18,907 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:29:18" (1/1) ... [2021-11-23 02:29:18,924 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:29:18" (1/1) ... [2021-11-23 02:29:18,932 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:29:18,933 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:29:18,933 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:29:18,934 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:29:18,937 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:29:18" (1/1) ... [2021-11-23 02:29:18,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:29:18,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:29:18,994 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:29:19,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:29:19,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:29:19,056 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-23 02:29:19,056 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-23 02:29:19,057 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-11-23 02:29:19,057 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-11-23 02:29:19,057 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-11-23 02:29:19,057 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-11-23 02:29:19,058 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-11-23 02:29:19,058 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-11-23 02:29:19,058 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-11-23 02:29:19,058 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-11-23 02:29:19,058 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-11-23 02:29:19,059 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-11-23 02:29:19,059 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-11-23 02:29:19,059 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-11-23 02:29:19,059 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-11-23 02:29:19,060 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-11-23 02:29:19,060 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-11-23 02:29:19,060 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-11-23 02:29:19,060 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-11-23 02:29:19,060 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-11-23 02:29:19,061 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-11-23 02:29:19,061 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-11-23 02:29:19,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:29:19,061 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-11-23 02:29:19,062 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-11-23 02:29:19,062 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-11-23 02:29:19,062 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-11-23 02:29:19,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:29:19,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:29:19,065 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-11-23 02:29:19,065 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-11-23 02:29:19,065 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-11-23 02:29:19,065 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-11-23 02:29:19,211 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:29:19,226 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:29:20,556 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:29:21,111 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:29:21,111 INFO L301 CfgBuilder]: Removed 20 assume(true) statements. [2021-11-23 02:29:21,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:29:21 BoogieIcfgContainer [2021-11-23 02:29:21,115 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:29:21,117 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:29:21,117 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:29:21,121 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:29:21,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:29:17" (1/3) ... [2021-11-23 02:29:21,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52e2cd1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:29:21, skipping insertion in model container [2021-11-23 02:29:21,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:29:18" (2/3) ... [2021-11-23 02:29:21,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52e2cd1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:29:21, skipping insertion in model container [2021-11-23 02:29:21,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:29:21" (3/3) ... [2021-11-23 02:29:21,127 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.13.cil-1.c [2021-11-23 02:29:21,137 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:29:21,137 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 02:29:21,215 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:29:21,231 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 [2021-11-23 02:29:21,231 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 02:29:21,296 INFO L276 IsEmpty]: Start isEmpty. Operand has 277 states, 216 states have (on average 1.5509259259259258) internal successors, (335), 224 states have internal predecessors, (335), 43 states have call successors, (43), 15 states have call predecessors, (43), 15 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2021-11-23 02:29:21,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-23 02:29:21,307 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:29:21,307 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:29:21,308 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:29:21,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:29:21,317 INFO L85 PathProgramCache]: Analyzing trace with hash 582250703, now seen corresponding path program 1 times [2021-11-23 02:29:21,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:29:21,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131393600] [2021-11-23 02:29:21,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:21,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:29:21,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:21,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:29:21,648 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:29:21,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131393600] [2021-11-23 02:29:21,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131393600] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:29:21,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:29:21,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:29:21,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81306636] [2021-11-23 02:29:21,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:29:21,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:29:21,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:29:21,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:29:21,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:29:21,691 INFO L87 Difference]: Start difference. First operand has 277 states, 216 states have (on average 1.5509259259259258) internal successors, (335), 224 states have internal predecessors, (335), 43 states have call successors, (43), 15 states have call predecessors, (43), 15 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-23 02:29:22,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:29:22,292 INFO L93 Difference]: Finished difference Result 604 states and 913 transitions. [2021-11-23 02:29:22,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:29:22,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2021-11-23 02:29:22,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:29:22,311 INFO L225 Difference]: With dead ends: 604 [2021-11-23 02:29:22,311 INFO L226 Difference]: Without dead ends: 331 [2021-11-23 02:29:22,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:29:22,322 INFO L933 BasicCegarLoop]: 395 mSDtfsCounter, 467 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:29:22,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 688 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:29:22,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-11-23 02:29:22,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 324. [2021-11-23 02:29:22,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 251 states have (on average 1.4661354581673307) internal successors, (368), 256 states have internal predecessors, (368), 51 states have call successors, (51), 22 states have call predecessors, (51), 20 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2021-11-23 02:29:22,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 466 transitions. [2021-11-23 02:29:22,410 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 466 transitions. Word has length 45 [2021-11-23 02:29:22,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:29:22,411 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 466 transitions. [2021-11-23 02:29:22,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-23 02:29:22,412 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 466 transitions. [2021-11-23 02:29:22,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-23 02:29:22,415 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:29:22,415 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:29:22,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:29:22,416 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:29:22,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:29:22,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1501225326, now seen corresponding path program 1 times [2021-11-23 02:29:22,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:29:22,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579251913] [2021-11-23 02:29:22,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:22,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:29:22,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:22,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:29:22,594 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:29:22,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579251913] [2021-11-23 02:29:22,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579251913] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:29:22,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:29:22,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:29:22,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168787496] [2021-11-23 02:29:22,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:29:22,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:29:22,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:29:22,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:29:22,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:29:22,599 INFO L87 Difference]: Start difference. First operand 324 states and 466 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-23 02:29:23,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:29:23,531 INFO L93 Difference]: Finished difference Result 726 states and 969 transitions. [2021-11-23 02:29:23,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:29:23,532 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2021-11-23 02:29:23,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:29:23,546 INFO L225 Difference]: With dead ends: 726 [2021-11-23 02:29:23,546 INFO L226 Difference]: Without dead ends: 594 [2021-11-23 02:29:23,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:29:23,555 INFO L933 BasicCegarLoop]: 472 mSDtfsCounter, 952 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 956 SdHoareTripleChecker+Valid, 1206 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:29:23,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [956 Valid, 1206 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 02:29:23,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-11-23 02:29:23,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 510. [2021-11-23 02:29:23,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 383 states have (on average 1.3785900783289817) internal successors, (528), 389 states have internal predecessors, (528), 78 states have call successors, (78), 45 states have call predecessors, (78), 47 states have return successors, (78), 77 states have call predecessors, (78), 74 states have call successors, (78) [2021-11-23 02:29:23,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 684 transitions. [2021-11-23 02:29:23,664 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 684 transitions. Word has length 45 [2021-11-23 02:29:23,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:29:23,665 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 684 transitions. [2021-11-23 02:29:23,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-23 02:29:23,667 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 684 transitions. [2021-11-23 02:29:23,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-23 02:29:23,677 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:29:23,677 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:29:23,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:29:23,678 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:29:23,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:29:23,678 INFO L85 PathProgramCache]: Analyzing trace with hash -36762483, now seen corresponding path program 1 times [2021-11-23 02:29:23,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:29:23,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166596202] [2021-11-23 02:29:23,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:23,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:29:23,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:23,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:29:23,890 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:29:23,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166596202] [2021-11-23 02:29:23,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166596202] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:29:23,893 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:29:23,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 02:29:23,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460120795] [2021-11-23 02:29:23,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:29:23,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:29:23,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:29:23,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:29:23,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:29:23,896 INFO L87 Difference]: Start difference. First operand 510 states and 684 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-23 02:29:24,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:29:24,906 INFO L93 Difference]: Finished difference Result 1026 states and 1300 transitions. [2021-11-23 02:29:24,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 02:29:24,906 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2021-11-23 02:29:24,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:29:24,918 INFO L225 Difference]: With dead ends: 1026 [2021-11-23 02:29:24,919 INFO L226 Difference]: Without dead ends: 724 [2021-11-23 02:29:24,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-11-23 02:29:24,931 INFO L933 BasicCegarLoop]: 318 mSDtfsCounter, 563 mSDsluCounter, 1192 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 1305 SdHoareTripleChecker+Invalid, 1171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:29:24,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [595 Valid, 1305 Invalid, 1171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1061 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 02:29:24,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2021-11-23 02:29:25,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 689. [2021-11-23 02:29:25,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 508 states have (on average 1.3385826771653544) internal successors, (680), 515 states have internal predecessors, (680), 105 states have call successors, (105), 68 states have call predecessors, (105), 74 states have return successors, (109), 107 states have call predecessors, (109), 101 states have call successors, (109) [2021-11-23 02:29:25,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 894 transitions. [2021-11-23 02:29:25,019 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 894 transitions. Word has length 46 [2021-11-23 02:29:25,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:29:25,020 INFO L470 AbstractCegarLoop]: Abstraction has 689 states and 894 transitions. [2021-11-23 02:29:25,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-23 02:29:25,020 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 894 transitions. [2021-11-23 02:29:25,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-23 02:29:25,025 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:29:25,025 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:29:25,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:29:25,026 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:29:25,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:29:25,027 INFO L85 PathProgramCache]: Analyzing trace with hash -457206006, now seen corresponding path program 1 times [2021-11-23 02:29:25,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:29:25,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132343478] [2021-11-23 02:29:25,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:25,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:29:25,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:25,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:29:25,137 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:29:25,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132343478] [2021-11-23 02:29:25,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132343478] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:29:25,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:29:25,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:29:25,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422067095] [2021-11-23 02:29:25,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:29:25,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:29:25,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:29:25,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:29:25,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:29:25,140 INFO L87 Difference]: Start difference. First operand 689 states and 894 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:29:25,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:29:25,330 INFO L93 Difference]: Finished difference Result 1253 states and 1564 transitions. [2021-11-23 02:29:25,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:29:25,331 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2021-11-23 02:29:25,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:29:25,339 INFO L225 Difference]: With dead ends: 1253 [2021-11-23 02:29:25,339 INFO L226 Difference]: Without dead ends: 821 [2021-11-23 02:29:25,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:29:25,347 INFO L933 BasicCegarLoop]: 351 mSDtfsCounter, 67 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:29:25,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 664 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:29:25,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2021-11-23 02:29:25,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 716. [2021-11-23 02:29:25,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 531 states have (on average 1.3276836158192091) internal successors, (705), 538 states have internal predecessors, (705), 107 states have call successors, (107), 70 states have call predecessors, (107), 76 states have return successors, (111), 109 states have call predecessors, (111), 103 states have call successors, (111) [2021-11-23 02:29:25,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 923 transitions. [2021-11-23 02:29:25,441 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 923 transitions. Word has length 47 [2021-11-23 02:29:25,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:29:25,443 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 923 transitions. [2021-11-23 02:29:25,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:29:25,444 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 923 transitions. [2021-11-23 02:29:25,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-23 02:29:25,447 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:29:25,448 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:29:25,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:29:25,452 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:29:25,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:29:25,453 INFO L85 PathProgramCache]: Analyzing trace with hash -982022831, now seen corresponding path program 1 times [2021-11-23 02:29:25,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:29:25,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023766996] [2021-11-23 02:29:25,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:25,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:29:25,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:25,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:29:25,525 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:29:25,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023766996] [2021-11-23 02:29:25,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023766996] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:29:25,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:29:25,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:29:25,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401590090] [2021-11-23 02:29:25,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:29:25,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:29:25,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:29:25,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:29:25,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:29:25,527 INFO L87 Difference]: Start difference. First operand 716 states and 923 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:29:25,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:29:25,688 INFO L93 Difference]: Finished difference Result 906 states and 1144 transitions. [2021-11-23 02:29:25,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:29:25,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2021-11-23 02:29:25,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:29:25,695 INFO L225 Difference]: With dead ends: 906 [2021-11-23 02:29:25,695 INFO L226 Difference]: Without dead ends: 633 [2021-11-23 02:29:25,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:29:25,699 INFO L933 BasicCegarLoop]: 349 mSDtfsCounter, 372 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:29:25,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 410 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:29:25,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-11-23 02:29:25,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 524. [2021-11-23 02:29:25,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 391 states have (on average 1.3375959079283888) internal successors, (523), 396 states have internal predecessors, (523), 83 states have call successors, (83), 50 states have call predecessors, (83), 48 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2021-11-23 02:29:25,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 685 transitions. [2021-11-23 02:29:25,753 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 685 transitions. Word has length 53 [2021-11-23 02:29:25,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:29:25,754 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 685 transitions. [2021-11-23 02:29:25,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:29:25,754 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 685 transitions. [2021-11-23 02:29:25,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-23 02:29:25,756 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:29:25,757 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:29:25,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:29:25,757 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:29:25,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:29:25,758 INFO L85 PathProgramCache]: Analyzing trace with hash -346828501, now seen corresponding path program 1 times [2021-11-23 02:29:25,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:29:25,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504968156] [2021-11-23 02:29:25,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:25,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:29:25,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:25,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:29:25,843 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:29:25,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504968156] [2021-11-23 02:29:25,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504968156] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:29:25,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:29:25,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:29:25,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041198284] [2021-11-23 02:29:25,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:29:25,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:29:25,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:29:25,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:29:25,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:29:25,846 INFO L87 Difference]: Start difference. First operand 524 states and 685 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-23 02:29:26,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:29:26,186 INFO L93 Difference]: Finished difference Result 627 states and 801 transitions. [2021-11-23 02:29:26,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:29:26,186 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2021-11-23 02:29:26,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:29:26,194 INFO L225 Difference]: With dead ends: 627 [2021-11-23 02:29:26,194 INFO L226 Difference]: Without dead ends: 624 [2021-11-23 02:29:26,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:29:26,197 INFO L933 BasicCegarLoop]: 346 mSDtfsCounter, 673 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:29:26,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [673 Valid, 386 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:29:26,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-11-23 02:29:26,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 523. [2021-11-23 02:29:26,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 391 states have (on average 1.329923273657289) internal successors, (520), 395 states have internal predecessors, (520), 82 states have call successors, (82), 50 states have call predecessors, (82), 48 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2021-11-23 02:29:26,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 681 transitions. [2021-11-23 02:29:26,265 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 681 transitions. Word has length 54 [2021-11-23 02:29:26,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:29:26,266 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 681 transitions. [2021-11-23 02:29:26,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-23 02:29:26,266 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 681 transitions. [2021-11-23 02:29:26,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-23 02:29:26,267 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:29:26,268 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:29:26,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:29:26,268 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:29:26,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:29:26,269 INFO L85 PathProgramCache]: Analyzing trace with hash 2131683443, now seen corresponding path program 1 times [2021-11-23 02:29:26,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:29:26,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287797113] [2021-11-23 02:29:26,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:26,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:29:26,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:26,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:29:26,355 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:29:26,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287797113] [2021-11-23 02:29:26,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287797113] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:29:26,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298084141] [2021-11-23 02:29:26,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:26,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:29:26,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:29:26,362 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:29:26,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:29:26,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:26,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:29:26,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:29:27,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:29:27,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:29:27,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:29:27,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298084141] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:29:27,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [204939750] [2021-11-23 02:29:27,348 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2021-11-23 02:29:27,348 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:29:27,354 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:29:27,361 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:29:27,362 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:29:35,098 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 215 for LOIs [2021-11-23 02:29:35,144 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 183 for LOIs [2021-11-23 02:29:35,166 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 211 for LOIs [2021-11-23 02:29:35,218 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 219 for LOIs [2021-11-23 02:29:36,223 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 215 for LOIs [2021-11-23 02:29:36,383 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 215 for LOIs [2021-11-23 02:29:36,535 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 215 for LOIs [2021-11-23 02:29:36,575 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 222 for LOIs [2021-11-23 02:29:36,612 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:30:04,732 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12910#(and (= ~E_12~0 2) (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~T11_E~0 2) (= ~t10_i~0 0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_13~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~t13_st~0 0) (= ~m_st~0 0) (= ~E_5~0 2) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~E_10~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~T9_E~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~E_11~0 2) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (= ~m_i~0 0) (= ~t10_st~0 0) (= ~t10_pc~0 0) (= 0 ~t9_pc~0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~t11_pc~0 0) (= ~p_dw_pc~0 1) (= ~T12_E~0 2) (= ~t11_i~0 0) (= ~T13_E~0 2) (= ~t12_pc~0 0) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~t12_i~0 0) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~t13_i~0 0) (= ~token~0 0) (= ~c_dr_pc~0 0) (= 2 ~p_dw_st~0) (= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= ~t12_st~0 0) (= 0 ~t4_pc~0) (= ~t13_pc~0 0) (= ~t11_st~0 0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~E_9~0 2) (= ~c_dr_st~0 1) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2021-11-23 02:30:04,732 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:30:04,732 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:30:04,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2021-11-23 02:30:04,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350427976] [2021-11-23 02:30:04,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:30:04,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:30:04,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:30:04,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:30:04,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2021-11-23 02:30:04,735 INFO L87 Difference]: Start difference. First operand 523 states and 681 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-23 02:30:05,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:30:05,368 INFO L93 Difference]: Finished difference Result 1096 states and 1336 transitions. [2021-11-23 02:30:05,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:30:05,369 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 55 [2021-11-23 02:30:05,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:30:05,377 INFO L225 Difference]: With dead ends: 1096 [2021-11-23 02:30:05,377 INFO L226 Difference]: Without dead ends: 1093 [2021-11-23 02:30:05,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 28.1s TimeCoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2021-11-23 02:30:05,379 INFO L933 BasicCegarLoop]: 451 mSDtfsCounter, 630 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:30:05,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [630 Valid, 1211 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:30:05,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2021-11-23 02:30:05,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 818. [2021-11-23 02:30:05,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 596 states have (on average 1.2802013422818792) internal successors, (763), 600 states have internal predecessors, (763), 130 states have call successors, (130), 92 states have call predecessors, (130), 90 states have return successors, (127), 127 states have call predecessors, (127), 127 states have call successors, (127) [2021-11-23 02:30:05,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1020 transitions. [2021-11-23 02:30:05,449 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1020 transitions. Word has length 55 [2021-11-23 02:30:05,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:30:05,450 INFO L470 AbstractCegarLoop]: Abstraction has 818 states and 1020 transitions. [2021-11-23 02:30:05,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-23 02:30:05,450 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1020 transitions. [2021-11-23 02:30:05,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-23 02:30:05,451 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:30:05,452 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:30:05,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:30:05,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-23 02:30:05,665 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:30:05,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:30:05,665 INFO L85 PathProgramCache]: Analyzing trace with hash -2127454805, now seen corresponding path program 2 times [2021-11-23 02:30:05,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:30:05,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496945577] [2021-11-23 02:30:05,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:05,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:30:05,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:05,713 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:30:05,713 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:30:05,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496945577] [2021-11-23 02:30:05,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496945577] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:30:05,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:30:05,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:30:05,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145099552] [2021-11-23 02:30:05,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:30:05,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:30:05,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:30:05,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:30:05,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:30:05,716 INFO L87 Difference]: Start difference. First operand 818 states and 1020 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-23 02:30:05,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:30:05,866 INFO L93 Difference]: Finished difference Result 1231 states and 1493 transitions. [2021-11-23 02:30:05,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:30:05,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 58 [2021-11-23 02:30:05,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:30:05,872 INFO L225 Difference]: With dead ends: 1231 [2021-11-23 02:30:05,872 INFO L226 Difference]: Without dead ends: 820 [2021-11-23 02:30:05,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:30:05,874 INFO L933 BasicCegarLoop]: 377 mSDtfsCounter, 375 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:30:05,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 443 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:30:05,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-11-23 02:30:05,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 814. [2021-11-23 02:30:05,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 592 states have (on average 1.2685810810810811) internal successors, (751), 596 states have internal predecessors, (751), 130 states have call successors, (130), 92 states have call predecessors, (130), 90 states have return successors, (127), 127 states have call predecessors, (127), 127 states have call successors, (127) [2021-11-23 02:30:05,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1008 transitions. [2021-11-23 02:30:05,939 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1008 transitions. Word has length 58 [2021-11-23 02:30:05,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:30:05,940 INFO L470 AbstractCegarLoop]: Abstraction has 814 states and 1008 transitions. [2021-11-23 02:30:05,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-23 02:30:05,940 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1008 transitions. [2021-11-23 02:30:05,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-23 02:30:05,942 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:30:05,942 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 02:30:05,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:30:05,942 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:30:05,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:30:05,943 INFO L85 PathProgramCache]: Analyzing trace with hash -182434709, now seen corresponding path program 1 times [2021-11-23 02:30:05,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:30:05,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366626232] [2021-11-23 02:30:05,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:05,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:30:05,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:05,980 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:30:05,980 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:30:05,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366626232] [2021-11-23 02:30:05,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366626232] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:30:05,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:30:05,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:30:05,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190054732] [2021-11-23 02:30:05,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:30:05,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:30:05,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:30:05,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:30:05,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:30:05,983 INFO L87 Difference]: Start difference. First operand 814 states and 1008 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:30:06,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:30:06,166 INFO L93 Difference]: Finished difference Result 1433 states and 1718 transitions. [2021-11-23 02:30:06,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:30:06,167 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2021-11-23 02:30:06,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:30:06,175 INFO L225 Difference]: With dead ends: 1433 [2021-11-23 02:30:06,175 INFO L226 Difference]: Without dead ends: 1070 [2021-11-23 02:30:06,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:30:06,178 INFO L933 BasicCegarLoop]: 370 mSDtfsCounter, 42 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:30:06,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 700 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:30:06,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2021-11-23 02:30:06,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 889. [2021-11-23 02:30:06,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 653 states have (on average 1.2649310872894335) internal successors, (826), 657 states have internal predecessors, (826), 137 states have call successors, (137), 99 states have call predecessors, (137), 97 states have return successors, (134), 134 states have call predecessors, (134), 134 states have call successors, (134) [2021-11-23 02:30:06,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 1097 transitions. [2021-11-23 02:30:06,277 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 1097 transitions. Word has length 61 [2021-11-23 02:30:06,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:30:06,278 INFO L470 AbstractCegarLoop]: Abstraction has 889 states and 1097 transitions. [2021-11-23 02:30:06,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:30:06,278 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 1097 transitions. [2021-11-23 02:30:06,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 02:30:06,279 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:30:06,280 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:30:06,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 02:30:06,280 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:30:06,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:30:06,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1543423458, now seen corresponding path program 1 times [2021-11-23 02:30:06,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:30:06,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332421379] [2021-11-23 02:30:06,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:06,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:30:06,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:06,366 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:30:06,366 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:30:06,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332421379] [2021-11-23 02:30:06,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332421379] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:30:06,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:30:06,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 02:30:06,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912909108] [2021-11-23 02:30:06,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:30:06,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:30:06,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:30:06,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:30:06,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:30:06,368 INFO L87 Difference]: Start difference. First operand 889 states and 1097 transitions. Second operand has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-23 02:30:07,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:30:07,245 INFO L93 Difference]: Finished difference Result 1938 states and 2280 transitions. [2021-11-23 02:30:07,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 02:30:07,246 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 70 [2021-11-23 02:30:07,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:30:07,254 INFO L225 Difference]: With dead ends: 1938 [2021-11-23 02:30:07,255 INFO L226 Difference]: Without dead ends: 1257 [2021-11-23 02:30:07,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-11-23 02:30:07,258 INFO L933 BasicCegarLoop]: 311 mSDtfsCounter, 545 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 954 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:30:07,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [576 Valid, 1117 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 954 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 02:30:07,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2021-11-23 02:30:07,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 1208. [2021-11-23 02:30:07,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 867 states have (on average 1.2249134948096885) internal successors, (1062), 871 states have internal predecessors, (1062), 193 states have call successors, (193), 148 states have call predecessors, (193), 146 states have return successors, (190), 190 states have call predecessors, (190), 190 states have call successors, (190) [2021-11-23 02:30:07,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1445 transitions. [2021-11-23 02:30:07,366 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1445 transitions. Word has length 70 [2021-11-23 02:30:07,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:30:07,367 INFO L470 AbstractCegarLoop]: Abstraction has 1208 states and 1445 transitions. [2021-11-23 02:30:07,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-23 02:30:07,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1445 transitions. [2021-11-23 02:30:07,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 02:30:07,378 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:30:07,378 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:30:07,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 02:30:07,379 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:30:07,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:30:07,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1606204126, now seen corresponding path program 1 times [2021-11-23 02:30:07,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:30:07,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255818541] [2021-11-23 02:30:07,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:07,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:30:07,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:07,453 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:30:07,454 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:30:07,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255818541] [2021-11-23 02:30:07,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255818541] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:30:07,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:30:07,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:30:07,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943627491] [2021-11-23 02:30:07,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:30:07,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:30:07,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:30:07,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:30:07,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:30:07,457 INFO L87 Difference]: Start difference. First operand 1208 states and 1445 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:30:07,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:30:07,700 INFO L93 Difference]: Finished difference Result 2174 states and 2539 transitions. [2021-11-23 02:30:07,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:30:07,700 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2021-11-23 02:30:07,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:30:07,711 INFO L225 Difference]: With dead ends: 2174 [2021-11-23 02:30:07,711 INFO L226 Difference]: Without dead ends: 1384 [2021-11-23 02:30:07,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:30:07,714 INFO L933 BasicCegarLoop]: 364 mSDtfsCounter, 37 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:30:07,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 694 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:30:07,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2021-11-23 02:30:07,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1255. [2021-11-23 02:30:07,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 906 states have (on average 1.2229580573951435) internal successors, (1108), 910 states have internal predecessors, (1108), 197 states have call successors, (197), 152 states have call predecessors, (197), 150 states have return successors, (194), 194 states have call predecessors, (194), 194 states have call successors, (194) [2021-11-23 02:30:07,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 1499 transitions. [2021-11-23 02:30:07,830 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 1499 transitions. Word has length 71 [2021-11-23 02:30:07,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:30:07,831 INFO L470 AbstractCegarLoop]: Abstraction has 1255 states and 1499 transitions. [2021-11-23 02:30:07,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:30:07,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 1499 transitions. [2021-11-23 02:30:07,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 02:30:07,834 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:30:07,834 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:30:07,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 02:30:07,834 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:30:07,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:30:07,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1370684203, now seen corresponding path program 1 times [2021-11-23 02:30:07,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:30:07,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057899992] [2021-11-23 02:30:07,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:07,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:30:07,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:07,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:30:07,928 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:30:07,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057899992] [2021-11-23 02:30:07,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057899992] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:30:07,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:30:07,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:30:07,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549970187] [2021-11-23 02:30:07,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:30:07,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:30:07,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:30:07,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:30:07,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:30:07,931 INFO L87 Difference]: Start difference. First operand 1255 states and 1499 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 02:30:09,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:30:09,075 INFO L93 Difference]: Finished difference Result 2198 states and 3071 transitions. [2021-11-23 02:30:09,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:30:09,076 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 71 [2021-11-23 02:30:09,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:30:09,091 INFO L225 Difference]: With dead ends: 2198 [2021-11-23 02:30:09,091 INFO L226 Difference]: Without dead ends: 2001 [2021-11-23 02:30:09,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:30:09,097 INFO L933 BasicCegarLoop]: 658 mSDtfsCounter, 1553 mSDsluCounter, 1129 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1571 SdHoareTripleChecker+Valid, 1577 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:30:09,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1571 Valid, 1577 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 02:30:09,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2001 states. [2021-11-23 02:30:09,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2001 to 1988. [2021-11-23 02:30:09,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1526 states have (on average 1.3499344692005242) internal successors, (2060), 1533 states have internal predecessors, (2060), 286 states have call successors, (286), 176 states have call predecessors, (286), 174 states have return successors, (349), 280 states have call predecessors, (349), 283 states have call successors, (349) [2021-11-23 02:30:09,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 2695 transitions. [2021-11-23 02:30:09,305 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 2695 transitions. Word has length 71 [2021-11-23 02:30:09,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:30:09,306 INFO L470 AbstractCegarLoop]: Abstraction has 1988 states and 2695 transitions. [2021-11-23 02:30:09,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 02:30:09,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 2695 transitions. [2021-11-23 02:30:09,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-23 02:30:09,309 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:30:09,309 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:30:09,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 02:30:09,310 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:30:09,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:30:09,310 INFO L85 PathProgramCache]: Analyzing trace with hash -564405114, now seen corresponding path program 1 times [2021-11-23 02:30:09,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:30:09,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000192672] [2021-11-23 02:30:09,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:09,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:30:09,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:09,471 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-23 02:30:09,471 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:30:09,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000192672] [2021-11-23 02:30:09,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000192672] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:30:09,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722227987] [2021-11-23 02:30:09,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:09,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:30:09,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:30:09,473 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:30:09,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:30:09,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:09,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 02:30:09,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:30:09,803 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:30:09,804 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:30:09,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722227987] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:30:09,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:30:09,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2021-11-23 02:30:09,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699803060] [2021-11-23 02:30:09,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:30:09,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:30:09,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:30:09,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:30:09,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-11-23 02:30:09,806 INFO L87 Difference]: Start difference. First operand 1988 states and 2695 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-23 02:30:10,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:30:10,229 INFO L93 Difference]: Finished difference Result 2852 states and 3700 transitions. [2021-11-23 02:30:10,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:30:10,230 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2021-11-23 02:30:10,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:30:10,245 INFO L225 Difference]: With dead ends: 2852 [2021-11-23 02:30:10,245 INFO L226 Difference]: Without dead ends: 1805 [2021-11-23 02:30:10,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-11-23 02:30:10,250 INFO L933 BasicCegarLoop]: 379 mSDtfsCounter, 369 mSDsluCounter, 1246 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 1429 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:30:10,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 1429 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:30:10,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1805 states. [2021-11-23 02:30:10,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1805 to 1620. [2021-11-23 02:30:10,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1289 states have (on average 1.3886733902249806) internal successors, (1790), 1296 states have internal predecessors, (1790), 215 states have call successors, (215), 116 states have call predecessors, (215), 114 states have return successors, (278), 209 states have call predecessors, (278), 212 states have call successors, (278) [2021-11-23 02:30:10,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 2283 transitions. [2021-11-23 02:30:10,428 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 2283 transitions. Word has length 102 [2021-11-23 02:30:10,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:30:10,428 INFO L470 AbstractCegarLoop]: Abstraction has 1620 states and 2283 transitions. [2021-11-23 02:30:10,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-23 02:30:10,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 2283 transitions. [2021-11-23 02:30:10,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 02:30:10,432 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:30:10,432 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:30:10,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:30:10,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-23 02:30:10,656 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:30:10,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:30:10,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1286120463, now seen corresponding path program 1 times [2021-11-23 02:30:10,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:30:10,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934652710] [2021-11-23 02:30:10,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:10,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:30:10,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:10,737 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 02:30:10,737 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:30:10,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934652710] [2021-11-23 02:30:10,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934652710] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:30:10,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972687276] [2021-11-23 02:30:10,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:10,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:30:10,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:30:10,739 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:30:10,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:30:10,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:10,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 02:30:10,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:30:11,137 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:30:11,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:30:11,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972687276] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:30:11,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:30:11,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2021-11-23 02:30:11,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009352901] [2021-11-23 02:30:11,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:30:11,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:30:11,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:30:11,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:30:11,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-23 02:30:11,143 INFO L87 Difference]: Start difference. First operand 1620 states and 2283 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-23 02:30:11,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:30:11,551 INFO L93 Difference]: Finished difference Result 2169 states and 2908 transitions. [2021-11-23 02:30:11,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:30:11,552 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2021-11-23 02:30:11,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:30:11,565 INFO L225 Difference]: With dead ends: 2169 [2021-11-23 02:30:11,566 INFO L226 Difference]: Without dead ends: 1576 [2021-11-23 02:30:11,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-11-23 02:30:11,569 INFO L933 BasicCegarLoop]: 377 mSDtfsCounter, 66 mSDsluCounter, 1683 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 1797 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:30:11,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 1797 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:30:11,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2021-11-23 02:30:11,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1484. [2021-11-23 02:30:11,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1189 states have (on average 1.4070647603027755) internal successors, (1673), 1196 states have internal predecessors, (1673), 196 states have call successors, (196), 99 states have call predecessors, (196), 97 states have return successors, (259), 190 states have call predecessors, (259), 193 states have call successors, (259) [2021-11-23 02:30:11,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 2128 transitions. [2021-11-23 02:30:11,704 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 2128 transitions. Word has length 112 [2021-11-23 02:30:11,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:30:11,704 INFO L470 AbstractCegarLoop]: Abstraction has 1484 states and 2128 transitions. [2021-11-23 02:30:11,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-23 02:30:11,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 2128 transitions. [2021-11-23 02:30:11,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-23 02:30:11,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:30:11,709 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:30:11,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:30:11,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:30:11,929 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:30:11,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:30:11,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1216054669, now seen corresponding path program 1 times [2021-11-23 02:30:11,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:30:11,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834850035] [2021-11-23 02:30:11,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:11,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:30:11,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:12,015 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-23 02:30:12,015 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:30:12,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834850035] [2021-11-23 02:30:12,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834850035] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:30:12,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578151442] [2021-11-23 02:30:12,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:12,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:30:12,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:30:12,017 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:30:12,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:30:12,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:12,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:30:12,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:30:12,365 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 02:30:12,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:30:12,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578151442] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:30:12,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:30:12,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2021-11-23 02:30:12,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146769508] [2021-11-23 02:30:12,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:30:12,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:30:12,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:30:12,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:30:12,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:30:12,368 INFO L87 Difference]: Start difference. First operand 1484 states and 2128 transitions. Second operand has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-23 02:30:12,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:30:12,700 INFO L93 Difference]: Finished difference Result 2233 states and 2973 transitions. [2021-11-23 02:30:12,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:30:12,701 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2021-11-23 02:30:12,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:30:12,714 INFO L225 Difference]: With dead ends: 2233 [2021-11-23 02:30:12,714 INFO L226 Difference]: Without dead ends: 1776 [2021-11-23 02:30:12,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-11-23 02:30:12,720 INFO L933 BasicCegarLoop]: 366 mSDtfsCounter, 355 mSDsluCounter, 1374 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 1524 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:30:12,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 1524 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:30:12,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1776 states. [2021-11-23 02:30:12,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1776 to 1742. [2021-11-23 02:30:12,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1742 states, 1351 states have (on average 1.3715766099185789) internal successors, (1853), 1364 states have internal predecessors, (1853), 244 states have call successors, (244), 141 states have call predecessors, (244), 145 states have return successors, (319), 238 states have call predecessors, (319), 241 states have call successors, (319) [2021-11-23 02:30:12,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1742 states to 1742 states and 2416 transitions. [2021-11-23 02:30:12,875 INFO L78 Accepts]: Start accepts. Automaton has 1742 states and 2416 transitions. Word has length 113 [2021-11-23 02:30:12,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:30:12,876 INFO L470 AbstractCegarLoop]: Abstraction has 1742 states and 2416 transitions. [2021-11-23 02:30:12,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-23 02:30:12,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1742 states and 2416 transitions. [2021-11-23 02:30:12,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-23 02:30:12,880 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:30:12,880 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:30:12,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-23 02:30:13,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-23 02:30:13,097 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:30:13,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:30:13,097 INFO L85 PathProgramCache]: Analyzing trace with hash 704713102, now seen corresponding path program 1 times [2021-11-23 02:30:13,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:30:13,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30965152] [2021-11-23 02:30:13,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:13,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:30:13,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:13,421 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 02:30:13,422 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:30:13,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30965152] [2021-11-23 02:30:13,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30965152] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:30:13,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17229864] [2021-11-23 02:30:13,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:13,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:30:13,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:30:13,424 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:30:13,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:30:13,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:13,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-23 02:30:13,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:30:14,805 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:30:14,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:30:16,759 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 02:30:16,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17229864] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:30:16,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1385958424] [2021-11-23 02:30:16,764 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2021-11-23 02:30:16,764 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:30:16,765 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:30:16,765 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:30:16,765 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:31:23,591 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 392 for LOIs [2021-11-23 02:31:24,952 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 343 for LOIs [2021-11-23 02:31:25,094 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 334 for LOIs [2021-11-23 02:31:25,237 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 404 for LOIs [2021-11-23 02:31:28,928 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 222 for LOIs [2021-11-23 02:31:29,435 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 168 for LOIs [2021-11-23 02:31:29,906 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 396 for LOIs [2021-11-23 02:31:30,608 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 419 for LOIs [2021-11-23 02:31:31,404 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:32:37,076 WARN L227 SmtUtils]: Spent 7.05s on a formula simplification. DAG size of input: 368 DAG size of output: 284 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:32:51,076 WARN L227 SmtUtils]: Spent 7.00s on a formula simplification. DAG size of input: 374 DAG size of output: 287 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:32:59,288 WARN L227 SmtUtils]: Spent 7.04s on a formula simplification. DAG size of input: 380 DAG size of output: 293 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:33:08,161 WARN L227 SmtUtils]: Spent 7.41s on a formula simplification. DAG size of input: 382 DAG size of output: 295 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:33:42,173 WARN L227 SmtUtils]: Spent 7.28s on a formula simplification. DAG size of input: 384 DAG size of output: 297 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:33:44,629 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '56812#(and (<= 0 ~t5_pc~0) (<= 0 ~t6_i~0) (<= ~t5_st~0 0) (<= 2 ~T6_E~0) (<= 0 |#NULL.base|) (<= ~T13_E~0 2) (<= ~T5_E~0 2) (<= 2 ~T4_E~0) (<= 0 ~t13_i~0) (= ~t10_i~0 0) (<= 1 ~c_dr_i~0) (<= 0 ~t3_i~0) (<= 2 ~E_13~0) (= ~t7_i~0 0) (<= 0 ~t5_st~0) (<= ~t12_i~0 0) (<= ~T6_E~0 2) (<= 2 ~T10_E~0) (<= 0 ~t8_pc~0) (<= ~E_3~0 2) (<= ~t4_st~0 0) (<= 2 ~E_11~0) (<= 0 ~c_dr_pc~0) (<= 0 ~t1_i~0) (<= 0 ~p_dw_st~0) (<= 0 ~t6_st~0) (<= 0 ~local~0) (<= 2 ~E_M~0) (= ~T1_E~0 2) (<= 0 ~t2_pc~0) (<= ~c_dr_i~0 1) (<= 0 ~t11_pc~0) (<= 0 ~t12_i~0) (<= ~T10_E~0 2) (<= 2 ~T3_E~0) (<= 0 ~p_dw_pc~0) (<= ~t2_st~0 0) (= ~q_free~0 1) (<= 1 ~q_req_up~0) (<= 0 ~t12_st~0) (<= ~E_2~0 2) (<= 0 ~p_num_write~0) (<= 2 ~T11_E~0) (<= ~t11_st~0 0) (<= ~token~0 0) (= ~T2_E~0 2) (<= ~c_dr_pc~0 1) (<= ~p_dw_st~0 2) (<= ~t6_pc~0 0) (<= 2 ~E_12~0) (<= 0 ~t7_st~0) (<= ~T7_E~0 2) (<= ~t11_pc~0 0) (<= ~t7_pc~0 0) (<= 0 ~t12_pc~0) (<= 0 ~t13_st~0) (<= ~t1_pc~0 0) (<= ~T4_E~0 2) (<= ~t8_i~0 0) (<= 2 ~M_E~0) (<= ~T9_E~0 2) (= ~t9_i~0 0) (<= |#NULL.offset| 0) (= ~t4_i~0 0) (<= 2 ~T13_E~0) (<= 0 ~t9_st~0) (<= 0 ~t10_st~0) (<= ~t5_i~0 0) (<= 2 ~E_2~0) (<= 2 ~T8_E~0) (<= ~T11_E~0 2) (<= 0 ~t11_st~0) (<= ~t13_pc~0 0) (<= 0 ~t13_pc~0) (<= 1 ~c_dr_st~0) (<= 2 ~E_9~0) (<= ~local~0 0) (<= ~t12_st~0 0) (<= 2 ~E_6~0) (= ~m_i~0 0) (<= ~t2_i~0 0) (<= 2 ~E_8~0) (<= ~t8_st~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~T3_E~0 2) (<= ~E_4~0 2) (<= 2 ~E_7~0) (<= 2 ~E_3~0) (<= ~t10_pc~0 0) (<= ~t9_pc~0 0) (<= 0 ~t5_i~0) (<= 0 ~t8_st~0) (<= ~E_12~0 2) (<= ~t9_st~0 0) (<= ~q_req_up~0 1) (<= ~T8_E~0 2) (<= ~E_6~0 2) (<= ~E_10~0 2) (<= 0 ~token~0) (<= 0 ~t2_i~0) (<= ~t3_st~0 0) (<= 0 ~t6_pc~0) (<= |#NULL.base| 0) (<= 0 ~t3_st~0) (<= ~E_13~0 2) (<= ~m_pc~0 0) (<= ~t1_i~0 0) (<= 0 ~t10_pc~0) (<= 2 ~E_4~0) (= ~p_dw_i~0 1) (<= 2 ~T7_E~0) (<= 2 ~E_10~0) (<= ~M_E~0 2) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (<= ~c_dr_st~0 1) (<= 2 ~T9_E~0) (<= ~t3_i~0 0) (<= 0 ~t2_st~0) (<= 0 ~t3_pc~0) (<= 0 ~t7_pc~0) (<= 0 ~t11_i~0) (<= ~t7_st~0 0) (<= 2 ~T12_E~0) (<= ~E_8~0 2) (<= 0 ~t9_pc~0) (<= ~t5_pc~0 0) (<= 2 ~E_5~0) (<= ~t6_i~0 0) (<= 0 ~t8_i~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (<= ~t12_pc~0 0) (<= 2 ~T5_E~0) (<= ~t13_st~0 0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (<= ~t2_pc~0 0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (<= ~E_M~0 2) (<= ~E_11~0 2) (<= ~t11_i~0 0) (<= ~t6_st~0 0) (<= 0 ~t1_st~0) (<= ~E_7~0 2) (<= ~t8_pc~0 0) (<= ~t10_st~0 0) (<= ~E_9~0 2) (<= 0 ~t1_pc~0) (<= 0 ~t4_st~0) (<= ~T12_E~0 2) (<= ~t13_i~0 0))' at error location [2021-11-23 02:33:44,629 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:33:44,629 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:33:44,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 16] total 49 [2021-11-23 02:33:44,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757033324] [2021-11-23 02:33:44,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:33:44,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-23 02:33:44,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:33:44,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-23 02:33:44,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=10140, Unknown=0, NotChecked=0, Total=10920 [2021-11-23 02:33:44,635 INFO L87 Difference]: Start difference. First operand 1742 states and 2416 transitions. Second operand has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) [2021-11-23 02:34:03,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:34:03,990 INFO L93 Difference]: Finished difference Result 4358 states and 5589 transitions. [2021-11-23 02:34:03,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 231 states. [2021-11-23 02:34:03,991 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) Word has length 114 [2021-11-23 02:34:03,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:34:04,017 INFO L225 Difference]: With dead ends: 4358 [2021-11-23 02:34:04,017 INFO L226 Difference]: Without dead ends: 3643 [2021-11-23 02:34:04,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 285 SyntacticMatches, 6 SemanticMatches, 325 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44084 ImplicationChecksByTransitivity, 147.9s TimeCoverageRelationStatistics Valid=9463, Invalid=97139, Unknown=0, NotChecked=0, Total=106602 [2021-11-23 02:34:04,045 INFO L933 BasicCegarLoop]: 415 mSDtfsCounter, 6233 mSDsluCounter, 3639 mSDsCounter, 0 mSdLazyCounter, 7388 mSolverCounterSat, 3451 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6237 SdHoareTripleChecker+Valid, 3562 SdHoareTripleChecker+Invalid, 10839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3451 IncrementalHoareTripleChecker+Valid, 7388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:34:04,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6237 Valid, 3562 Invalid, 10839 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3451 Valid, 7388 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-11-23 02:34:04,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3643 states. [2021-11-23 02:34:04,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3643 to 2018. [2021-11-23 02:34:04,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 1535 states have (on average 1.3446254071661239) internal successors, (2064), 1550 states have internal predecessors, (2064), 289 states have call successors, (289), 178 states have call predecessors, (289), 192 states have return successors, (376), 291 states have call predecessors, (376), 286 states have call successors, (376) [2021-11-23 02:34:04,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 2729 transitions. [2021-11-23 02:34:04,347 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 2729 transitions. Word has length 114 [2021-11-23 02:34:04,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:34:04,349 INFO L470 AbstractCegarLoop]: Abstraction has 2018 states and 2729 transitions. [2021-11-23 02:34:04,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) [2021-11-23 02:34:04,350 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 2729 transitions. [2021-11-23 02:34:04,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-23 02:34:04,353 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:34:04,353 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:34:04,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:34:04,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-23 02:34:04,581 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:34:04,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:34:04,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1854683568, now seen corresponding path program 1 times [2021-11-23 02:34:04,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:34:04,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684480389] [2021-11-23 02:34:04,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:04,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:34:04,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:04,767 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 02:34:04,768 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:34:04,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684480389] [2021-11-23 02:34:04,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684480389] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:34:04,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723499045] [2021-11-23 02:34:04,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:04,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:34:04,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:34:04,770 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:34:04,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:34:04,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:04,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 02:34:04,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:34:05,147 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 02:34:05,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:34:05,464 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-23 02:34:05,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723499045] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:34:05,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:34:05,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2021-11-23 02:34:05,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958632522] [2021-11-23 02:34:05,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:34:05,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:34:05,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:34:05,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:34:05,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-11-23 02:34:05,467 INFO L87 Difference]: Start difference. First operand 2018 states and 2729 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-23 02:34:06,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:34:06,348 INFO L93 Difference]: Finished difference Result 3342 states and 4277 transitions. [2021-11-23 02:34:06,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 02:34:06,349 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 115 [2021-11-23 02:34:06,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:34:06,366 INFO L225 Difference]: With dead ends: 3342 [2021-11-23 02:34:06,366 INFO L226 Difference]: Without dead ends: 2351 [2021-11-23 02:34:06,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-11-23 02:34:06,371 INFO L933 BasicCegarLoop]: 359 mSDtfsCounter, 545 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 1072 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:34:06,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [549 Valid, 1036 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1072 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 02:34:06,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-11-23 02:34:06,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 2098. [2021-11-23 02:34:06,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2098 states, 1580 states have (on average 1.3386075949367089) internal successors, (2115), 1598 states have internal predecessors, (2115), 308 states have call successors, (308), 187 states have call predecessors, (308), 208 states have return successors, (416), 314 states have call predecessors, (416), 305 states have call successors, (416) [2021-11-23 02:34:06,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2098 states to 2098 states and 2839 transitions. [2021-11-23 02:34:06,646 INFO L78 Accepts]: Start accepts. Automaton has 2098 states and 2839 transitions. Word has length 115 [2021-11-23 02:34:06,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:34:06,647 INFO L470 AbstractCegarLoop]: Abstraction has 2098 states and 2839 transitions. [2021-11-23 02:34:06,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-23 02:34:06,647 INFO L276 IsEmpty]: Start isEmpty. Operand 2098 states and 2839 transitions. [2021-11-23 02:34:06,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-23 02:34:06,651 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:34:06,652 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:34:06,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:34:06,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-23 02:34:06,868 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:34:06,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:34:06,868 INFO L85 PathProgramCache]: Analyzing trace with hash -388680401, now seen corresponding path program 1 times [2021-11-23 02:34:06,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:34:06,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114169981] [2021-11-23 02:34:06,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:06,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:34:06,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:07,199 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-23 02:34:07,199 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:34:07,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114169981] [2021-11-23 02:34:07,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114169981] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:34:07,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411582780] [2021-11-23 02:34:07,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:07,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:34:07,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:34:07,202 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:34:07,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 02:34:07,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:07,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-23 02:34:07,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:34:08,523 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:34:08,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:34:10,569 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 02:34:10,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411582780] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:34:10,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1291773971] [2021-11-23 02:34:10,573 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2021-11-23 02:34:10,574 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:34:10,575 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:34:10,575 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:34:10,575 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:34:38,207 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 392 for LOIs [2021-11-23 02:34:39,548 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 336 for LOIs [2021-11-23 02:34:39,596 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 170 for LOIs [2021-11-23 02:34:39,620 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 404 for LOIs [2021-11-23 02:34:43,329 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 222 for LOIs [2021-11-23 02:34:43,846 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 170 for LOIs [2021-11-23 02:34:44,347 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 396 for LOIs [2021-11-23 02:34:45,387 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 419 for LOIs [2021-11-23 02:34:46,213 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:35:48,583 WARN L227 SmtUtils]: Spent 5.39s on a formula simplification. DAG size of input: 418 DAG size of output: 203 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:36:40,494 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '75917#(and (= ~E_12~0 2) (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~T11_E~0 2) (= ~t10_i~0 0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_13~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (<= 0 ~p_dw_st~0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~t13_st~0 0) (<= 0 ~p_dw_pc~0) (= ~m_st~0 0) (= ~E_5~0 2) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~E_10~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (= ~T9_E~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~c_dr_pc~0 1) (= ~E_11~0 2) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (= ~m_i~0 0) (= ~t10_st~0 0) (= ~t10_pc~0 0) (= 0 ~t9_pc~0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~t11_pc~0 0) (= ~T12_E~0 2) (= ~t11_i~0 0) (= ~T13_E~0 2) (= ~t12_pc~0 0) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~t12_i~0 0) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~t13_i~0 0) (= ~token~0 0) (= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (= ~E_M~0 2) (= 0 ~t2_st~0) (= ~t12_st~0 0) (= 0 ~t4_pc~0) (= ~t13_pc~0 0) (= ~t11_st~0 0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~E_9~0 2) (= ~c_dr_st~0 1) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2021-11-23 02:36:40,494 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:36:40,494 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:36:40,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 51 [2021-11-23 02:36:40,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499036818] [2021-11-23 02:36:40,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:36:40,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-23 02:36:40,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:36:40,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-23 02:36:40,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=928, Invalid=10414, Unknown=0, NotChecked=0, Total=11342 [2021-11-23 02:36:40,499 INFO L87 Difference]: Start difference. First operand 2098 states and 2839 transitions. Second operand has 51 states, 34 states have (on average 6.264705882352941) internal successors, (213), 39 states have internal predecessors, (213), 24 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 23 states have call predecessors, (51), 24 states have call successors, (51) [2021-11-23 02:36:51,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:36:51,723 INFO L93 Difference]: Finished difference Result 4303 states and 5418 transitions. [2021-11-23 02:36:51,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-11-23 02:36:51,725 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 34 states have (on average 6.264705882352941) internal successors, (213), 39 states have internal predecessors, (213), 24 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 23 states have call predecessors, (51), 24 states have call successors, (51) Word has length 124 [2021-11-23 02:36:51,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:36:51,746 INFO L225 Difference]: With dead ends: 4303 [2021-11-23 02:36:51,746 INFO L226 Difference]: Without dead ends: 3232 [2021-11-23 02:36:51,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 316 SyntacticMatches, 6 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16871 ImplicationChecksByTransitivity, 120.7s TimeCoverageRelationStatistics Valid=4216, Invalid=38014, Unknown=0, NotChecked=0, Total=42230 [2021-11-23 02:36:51,758 INFO L933 BasicCegarLoop]: 397 mSDtfsCounter, 8662 mSDsluCounter, 3421 mSDsCounter, 0 mSdLazyCounter, 7238 mSolverCounterSat, 4777 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8662 SdHoareTripleChecker+Valid, 3259 SdHoareTripleChecker+Invalid, 12015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4777 IncrementalHoareTripleChecker+Valid, 7238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:36:51,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8662 Valid, 3259 Invalid, 12015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4777 Valid, 7238 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-11-23 02:36:51,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3232 states. [2021-11-23 02:36:52,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3232 to 1914. [2021-11-23 02:36:52,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1468 states have (on average 1.353542234332425) internal successors, (1987), 1485 states have internal predecessors, (1987), 268 states have call successors, (268), 155 states have call predecessors, (268), 176 states have return successors, (366), 275 states have call predecessors, (366), 265 states have call successors, (366) [2021-11-23 02:36:52,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 2621 transitions. [2021-11-23 02:36:52,027 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 2621 transitions. Word has length 124 [2021-11-23 02:36:52,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:36:52,029 INFO L470 AbstractCegarLoop]: Abstraction has 1914 states and 2621 transitions. [2021-11-23 02:36:52,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 34 states have (on average 6.264705882352941) internal successors, (213), 39 states have internal predecessors, (213), 24 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 23 states have call predecessors, (51), 24 states have call successors, (51) [2021-11-23 02:36:52,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 2621 transitions. [2021-11-23 02:36:52,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-23 02:36:52,034 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:36:52,034 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:36:52,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:36:52,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-23 02:36:52,258 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:36:52,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:36:52,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1025758795, now seen corresponding path program 1 times [2021-11-23 02:36:52,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:36:52,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116564726] [2021-11-23 02:36:52,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:36:52,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:36:52,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:36:52,365 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-23 02:36:52,365 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:36:52,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116564726] [2021-11-23 02:36:52,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116564726] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:36:52,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302468504] [2021-11-23 02:36:52,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:36:52,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:36:52,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:36:52,367 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:36:52,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 02:36:52,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:36:52,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 02:36:52,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:36:52,724 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-23 02:36:52,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:36:53,019 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-23 02:36:53,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302468504] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:36:53,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:36:53,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2021-11-23 02:36:53,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110278153] [2021-11-23 02:36:53,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:36:53,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:36:53,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:36:53,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:36:53,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-11-23 02:36:53,022 INFO L87 Difference]: Start difference. First operand 1914 states and 2621 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-23 02:36:53,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:36:53,965 INFO L93 Difference]: Finished difference Result 2569 states and 3362 transitions. [2021-11-23 02:36:53,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 02:36:53,977 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 125 [2021-11-23 02:36:53,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:36:53,987 INFO L225 Difference]: With dead ends: 2569 [2021-11-23 02:36:53,987 INFO L226 Difference]: Without dead ends: 1682 [2021-11-23 02:36:53,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-11-23 02:36:53,991 INFO L933 BasicCegarLoop]: 350 mSDtfsCounter, 817 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 819 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:36:53,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [819 Valid, 1001 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 1132 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 02:36:53,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2021-11-23 02:36:54,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1645. [2021-11-23 02:36:54,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1645 states, 1269 states have (on average 1.3727344365642238) internal successors, (1742), 1286 states have internal predecessors, (1742), 232 states have call successors, (232), 125 states have call predecessors, (232), 142 states have return successors, (325), 235 states have call predecessors, (325), 229 states have call successors, (325) [2021-11-23 02:36:54,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 2299 transitions. [2021-11-23 02:36:54,196 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 2299 transitions. Word has length 125 [2021-11-23 02:36:54,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:36:54,197 INFO L470 AbstractCegarLoop]: Abstraction has 1645 states and 2299 transitions. [2021-11-23 02:36:54,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-23 02:36:54,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 2299 transitions. [2021-11-23 02:36:54,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-23 02:36:54,202 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:36:54,202 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:36:54,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 02:36:54,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:36:54,417 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:36:54,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:36:54,417 INFO L85 PathProgramCache]: Analyzing trace with hash 696299415, now seen corresponding path program 1 times [2021-11-23 02:36:54,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:36:54,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206935339] [2021-11-23 02:36:54,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:36:54,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:36:54,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:36:54,486 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 02:36:54,486 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:36:54,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206935339] [2021-11-23 02:36:54,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206935339] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:36:54,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832180713] [2021-11-23 02:36:54,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:36:54,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:36:54,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:36:54,492 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:36:54,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 02:36:54,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:36:54,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 1129 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:36:54,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:36:54,904 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 02:36:54,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:36:54,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832180713] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:36:54,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:36:54,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-23 02:36:54,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582657148] [2021-11-23 02:36:54,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:36:54,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:36:54,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:36:54,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:36:54,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:36:54,906 INFO L87 Difference]: Start difference. First operand 1645 states and 2299 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:36:55,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:36:55,189 INFO L93 Difference]: Finished difference Result 3489 states and 5408 transitions. [2021-11-23 02:36:55,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:36:55,198 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2021-11-23 02:36:55,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:36:55,213 INFO L225 Difference]: With dead ends: 3489 [2021-11-23 02:36:55,214 INFO L226 Difference]: Without dead ends: 2559 [2021-11-23 02:36:55,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:36:55,221 INFO L933 BasicCegarLoop]: 352 mSDtfsCounter, 347 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:36:55,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 600 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:36:55,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2559 states. [2021-11-23 02:36:55,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2559 to 2550. [2021-11-23 02:36:55,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2550 states, 2037 states have (on average 1.432007854688267) internal successors, (2917), 2057 states have internal predecessors, (2917), 339 states have call successors, (339), 155 states have call predecessors, (339), 172 states have return successors, (494), 339 states have call predecessors, (494), 336 states have call successors, (494) [2021-11-23 02:36:55,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 3750 transitions. [2021-11-23 02:36:55,545 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 3750 transitions. Word has length 144 [2021-11-23 02:36:55,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:36:55,546 INFO L470 AbstractCegarLoop]: Abstraction has 2550 states and 3750 transitions. [2021-11-23 02:36:55,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:36:55,546 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 3750 transitions. [2021-11-23 02:36:55,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-23 02:36:55,553 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:36:55,554 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:36:55,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 02:36:55,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-11-23 02:36:55,771 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:36:55,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:36:55,771 INFO L85 PathProgramCache]: Analyzing trace with hash 93233749, now seen corresponding path program 1 times [2021-11-23 02:36:55,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:36:55,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394034425] [2021-11-23 02:36:55,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:36:55,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:36:55,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:36:55,842 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 02:36:55,843 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:36:55,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394034425] [2021-11-23 02:36:55,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394034425] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:36:55,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281491023] [2021-11-23 02:36:55,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:36:55,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:36:55,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:36:55,845 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:36:55,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 02:36:56,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:36:56,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 1123 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:36:56,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:36:56,335 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-23 02:36:56,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:36:56,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281491023] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:36:56,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:36:56,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-23 02:36:56,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619620185] [2021-11-23 02:36:56,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:36:56,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:36:56,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:36:56,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:36:56,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:36:56,339 INFO L87 Difference]: Start difference. First operand 2550 states and 3750 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:36:56,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:36:56,785 INFO L93 Difference]: Finished difference Result 6189 states and 9862 transitions. [2021-11-23 02:36:56,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:36:56,786 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2021-11-23 02:36:56,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:36:56,805 INFO L225 Difference]: With dead ends: 6189 [2021-11-23 02:36:56,805 INFO L226 Difference]: Without dead ends: 4354 [2021-11-23 02:36:56,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:36:56,817 INFO L933 BasicCegarLoop]: 352 mSDtfsCounter, 368 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:36:56,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 600 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:36:56,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4354 states. [2021-11-23 02:36:57,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4354 to 4340. [2021-11-23 02:36:57,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4340 states, 3558 states have (on average 1.471894322653176) internal successors, (5237), 3584 states have internal predecessors, (5237), 548 states have call successors, (548), 215 states have call predecessors, (548), 232 states have return successors, (823), 542 states have call predecessors, (823), 545 states have call successors, (823) [2021-11-23 02:36:57,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4340 states to 4340 states and 6608 transitions. [2021-11-23 02:36:57,291 INFO L78 Accepts]: Start accepts. Automaton has 4340 states and 6608 transitions. Word has length 144 [2021-11-23 02:36:57,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:36:57,291 INFO L470 AbstractCegarLoop]: Abstraction has 4340 states and 6608 transitions. [2021-11-23 02:36:57,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:36:57,292 INFO L276 IsEmpty]: Start isEmpty. Operand 4340 states and 6608 transitions. [2021-11-23 02:36:57,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-23 02:36:57,305 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:36:57,305 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:36:57,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 02:36:57,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:36:57,532 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:36:57,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:36:57,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1699508823, now seen corresponding path program 1 times [2021-11-23 02:36:57,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:36:57,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955974145] [2021-11-23 02:36:57,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:36:57,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:36:57,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:36:57,603 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 02:36:57,603 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:36:57,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955974145] [2021-11-23 02:36:57,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955974145] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:36:57,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131419942] [2021-11-23 02:36:57,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:36:57,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:36:57,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:36:57,605 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:36:57,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 02:36:57,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:36:57,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 1117 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:36:57,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:36:58,047 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-23 02:36:58,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:36:58,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131419942] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:36:58,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:36:58,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-23 02:36:58,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612723526] [2021-11-23 02:36:58,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:36:58,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:36:58,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:36:58,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:36:58,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:36:58,050 INFO L87 Difference]: Start difference. First operand 4340 states and 6608 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:36:58,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:36:58,768 INFO L93 Difference]: Finished difference Result 11529 states and 18629 transitions. [2021-11-23 02:36:58,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:36:58,771 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2021-11-23 02:36:58,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:36:58,804 INFO L225 Difference]: With dead ends: 11529 [2021-11-23 02:36:58,805 INFO L226 Difference]: Without dead ends: 7904 [2021-11-23 02:36:58,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:36:58,827 INFO L933 BasicCegarLoop]: 352 mSDtfsCounter, 371 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:36:58,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 600 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:36:58,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7904 states. [2021-11-23 02:36:59,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7904 to 7880. [2021-11-23 02:36:59,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7880 states, 6570 states have (on average 1.4942161339421614) internal successors, (9817), 6608 states have internal predecessors, (9817), 956 states have call successors, (956), 335 states have call predecessors, (956), 352 states have return successors, (1463), 938 states have call predecessors, (1463), 953 states have call successors, (1463) [2021-11-23 02:36:59,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7880 states to 7880 states and 12236 transitions. [2021-11-23 02:36:59,520 INFO L78 Accepts]: Start accepts. Automaton has 7880 states and 12236 transitions. Word has length 144 [2021-11-23 02:36:59,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:36:59,520 INFO L470 AbstractCegarLoop]: Abstraction has 7880 states and 12236 transitions. [2021-11-23 02:36:59,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:36:59,521 INFO L276 IsEmpty]: Start isEmpty. Operand 7880 states and 12236 transitions. [2021-11-23 02:36:59,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-23 02:36:59,540 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:36:59,540 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:36:59,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 02:36:59,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:36:59,756 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:36:59,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:36:59,757 INFO L85 PathProgramCache]: Analyzing trace with hash -285373675, now seen corresponding path program 1 times [2021-11-23 02:36:59,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:36:59,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157453701] [2021-11-23 02:36:59,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:36:59,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:36:59,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:36:59,851 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 02:36:59,851 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:36:59,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157453701] [2021-11-23 02:36:59,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157453701] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:36:59,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373680890] [2021-11-23 02:36:59,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:36:59,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:36:59,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:36:59,853 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:36:59,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 02:37:00,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:37:00,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 1111 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:37:00,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:37:00,342 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:37:00,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:37:00,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373680890] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:37:00,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:37:00,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-23 02:37:00,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339055166] [2021-11-23 02:37:00,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:37:00,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:37:00,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:37:00,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:37:00,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:37:00,346 INFO L87 Difference]: Start difference. First operand 7880 states and 12236 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:37:01,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:37:01,491 INFO L93 Difference]: Finished difference Result 22089 states and 35881 transitions. [2021-11-23 02:37:01,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:37:01,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2021-11-23 02:37:01,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:37:01,571 INFO L225 Difference]: With dead ends: 22089 [2021-11-23 02:37:01,571 INFO L226 Difference]: Without dead ends: 14924 [2021-11-23 02:37:01,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:37:01,613 INFO L933 BasicCegarLoop]: 352 mSDtfsCounter, 341 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:37:01,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 600 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:37:01,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14924 states. [2021-11-23 02:37:02,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14924 to 14880. [2021-11-23 02:37:02,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14880 states, 12534 states have (on average 1.5044678474549227) internal successors, (18857), 12596 states have internal predecessors, (18857), 1752 states have call successors, (1752), 575 states have call predecessors, (1752), 592 states have return successors, (2707), 1710 states have call predecessors, (2707), 1749 states have call successors, (2707) [2021-11-23 02:37:03,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14880 states to 14880 states and 23316 transitions. [2021-11-23 02:37:03,007 INFO L78 Accepts]: Start accepts. Automaton has 14880 states and 23316 transitions. Word has length 144 [2021-11-23 02:37:03,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:37:03,007 INFO L470 AbstractCegarLoop]: Abstraction has 14880 states and 23316 transitions. [2021-11-23 02:37:03,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:37:03,008 INFO L276 IsEmpty]: Start isEmpty. Operand 14880 states and 23316 transitions. [2021-11-23 02:37:03,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-23 02:37:03,037 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:37:03,037 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:37:03,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 02:37:03,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:37:03,252 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:37:03,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:37:03,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1641028525, now seen corresponding path program 1 times [2021-11-23 02:37:03,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:37:03,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374956976] [2021-11-23 02:37:03,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:37:03,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:37:03,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:37:03,332 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 02:37:03,332 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:37:03,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374956976] [2021-11-23 02:37:03,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374956976] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:37:03,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941266790] [2021-11-23 02:37:03,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:37:03,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:37:03,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:37:03,334 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:37:03,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 02:37:03,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:37:03,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 1105 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:37:03,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:37:03,799 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-23 02:37:03,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:37:03,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941266790] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:37:03,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:37:03,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-23 02:37:03,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673061972] [2021-11-23 02:37:03,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:37:03,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:37:03,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:37:03,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:37:03,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:37:03,801 INFO L87 Difference]: Start difference. First operand 14880 states and 23316 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:37:05,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:37:05,754 INFO L93 Difference]: Finished difference Result 42969 states and 69821 transitions. [2021-11-23 02:37:05,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:37:05,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2021-11-23 02:37:05,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:37:05,885 INFO L225 Difference]: With dead ends: 42969 [2021-11-23 02:37:05,885 INFO L226 Difference]: Without dead ends: 28804 [2021-11-23 02:37:05,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:37:05,936 INFO L933 BasicCegarLoop]: 352 mSDtfsCounter, 362 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:37:05,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 600 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:37:05,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28804 states. [2021-11-23 02:37:08,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28804 to 28720. [2021-11-23 02:37:08,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28720 states, 24342 states have (on average 1.5075589516062773) internal successors, (36697), 24452 states have internal predecessors, (36697), 3304 states have call successors, (3304), 1055 states have call predecessors, (3304), 1072 states have return successors, (5123), 3214 states have call predecessors, (5123), 3301 states have call successors, (5123) [2021-11-23 02:37:08,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28720 states to 28720 states and 45124 transitions. [2021-11-23 02:37:08,357 INFO L78 Accepts]: Start accepts. Automaton has 28720 states and 45124 transitions. Word has length 144 [2021-11-23 02:37:08,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:37:08,358 INFO L470 AbstractCegarLoop]: Abstraction has 28720 states and 45124 transitions. [2021-11-23 02:37:08,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:37:08,358 INFO L276 IsEmpty]: Start isEmpty. Operand 28720 states and 45124 transitions. [2021-11-23 02:37:08,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-23 02:37:08,402 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:37:08,402 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:37:08,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 02:37:08,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:37:08,624 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:37:08,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:37:08,625 INFO L85 PathProgramCache]: Analyzing trace with hash -729653803, now seen corresponding path program 1 times [2021-11-23 02:37:08,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:37:08,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683552718] [2021-11-23 02:37:08,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:37:08,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:37:08,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:37:08,697 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 02:37:08,697 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:37:08,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683552718] [2021-11-23 02:37:08,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683552718] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:37:08,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276214900] [2021-11-23 02:37:08,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:37:08,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:37:08,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:37:08,699 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:37:08,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 02:37:08,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:37:08,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 1099 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:37:08,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:37:09,172 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 02:37:09,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:37:09,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276214900] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:37:09,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:37:09,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-23 02:37:09,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152152448] [2021-11-23 02:37:09,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:37:09,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:37:09,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:37:09,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:37:09,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:37:09,174 INFO L87 Difference]: Start difference. First operand 28720 states and 45124 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:37:13,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:37:13,189 INFO L93 Difference]: Finished difference Result 84249 states and 136573 transitions. [2021-11-23 02:37:13,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:37:13,190 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2021-11-23 02:37:13,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:37:13,446 INFO L225 Difference]: With dead ends: 84249 [2021-11-23 02:37:13,447 INFO L226 Difference]: Without dead ends: 56244 [2021-11-23 02:37:13,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:37:13,546 INFO L933 BasicCegarLoop]: 352 mSDtfsCounter, 350 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:37:13,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 600 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:37:13,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56244 states. [2021-11-23 02:37:18,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56244 to 56080. [2021-11-23 02:37:18,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56080 states, 47718 states have (on average 1.5067060647973511) internal successors, (71897), 47924 states have internal predecessors, (71897), 6328 states have call successors, (6328), 2015 states have call predecessors, (6328), 2032 states have return successors, (9811), 6142 states have call predecessors, (9811), 6325 states have call successors, (9811) [2021-11-23 02:37:18,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56080 states to 56080 states and 88036 transitions. [2021-11-23 02:37:18,517 INFO L78 Accepts]: Start accepts. Automaton has 56080 states and 88036 transitions. Word has length 144 [2021-11-23 02:37:18,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:37:18,518 INFO L470 AbstractCegarLoop]: Abstraction has 56080 states and 88036 transitions. [2021-11-23 02:37:18,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:37:18,518 INFO L276 IsEmpty]: Start isEmpty. Operand 56080 states and 88036 transitions. [2021-11-23 02:37:18,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-23 02:37:18,582 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:37:18,583 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:37:18,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-23 02:37:18,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-23 02:37:18,796 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:37:18,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:37:18,797 INFO L85 PathProgramCache]: Analyzing trace with hash -810710441, now seen corresponding path program 1 times [2021-11-23 02:37:18,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:37:18,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239638910] [2021-11-23 02:37:18,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:37:18,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:37:18,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:37:18,887 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 02:37:18,887 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:37:18,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239638910] [2021-11-23 02:37:18,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239638910] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:37:18,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822536328] [2021-11-23 02:37:18,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:37:18,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:37:18,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:37:18,889 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:37:18,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 02:37:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:37:19,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 1093 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:37:19,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:37:19,311 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-23 02:37:19,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:37:19,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822536328] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:37:19,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:37:19,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-23 02:37:19,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284971270] [2021-11-23 02:37:19,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:37:19,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:37:19,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:37:19,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:37:19,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:37:19,314 INFO L87 Difference]: Start difference. First operand 56080 states and 88036 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:37:27,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:37:27,510 INFO L93 Difference]: Finished difference Result 165849 states and 267821 transitions. [2021-11-23 02:37:27,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:37:27,510 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2021-11-23 02:37:27,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:37:28,117 INFO L225 Difference]: With dead ends: 165849 [2021-11-23 02:37:28,117 INFO L226 Difference]: Without dead ends: 110484 [2021-11-23 02:37:28,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:37:28,567 INFO L933 BasicCegarLoop]: 352 mSDtfsCounter, 356 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:37:28,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 600 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:37:28,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110484 states. [2021-11-23 02:37:37,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110484 to 110160. [2021-11-23 02:37:37,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110160 states, 93990 states have (on average 1.5037450792637514) internal successors, (141337), 94388 states have internal predecessors, (141337), 12216 states have call successors, (12216), 3935 states have call predecessors, (12216), 3952 states have return successors, (18899), 11838 states have call predecessors, (18899), 12213 states have call successors, (18899) [2021-11-23 02:37:38,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110160 states to 110160 states and 172452 transitions. [2021-11-23 02:37:38,082 INFO L78 Accepts]: Start accepts. Automaton has 110160 states and 172452 transitions. Word has length 144 [2021-11-23 02:37:38,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:37:38,083 INFO L470 AbstractCegarLoop]: Abstraction has 110160 states and 172452 transitions. [2021-11-23 02:37:38,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:37:38,083 INFO L276 IsEmpty]: Start isEmpty. Operand 110160 states and 172452 transitions. [2021-11-23 02:37:38,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-23 02:37:38,207 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:37:38,207 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:37:38,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-23 02:37:38,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48257a1a-2785-4bbb-bd4e-9932c1f414ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-23 02:37:38,408 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:37:38,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:37:38,408 INFO L85 PathProgramCache]: Analyzing trace with hash -307114663, now seen corresponding path program 1 times [2021-11-23 02:37:38,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:37:38,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140598462] [2021-11-23 02:37:38,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:37:38,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:37:38,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:37:38,559 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-23 02:37:38,560 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:37:38,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140598462] [2021-11-23 02:37:38,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140598462] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:37:38,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:37:38,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:37:38,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094238950] [2021-11-23 02:37:38,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:37:38,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:37:38,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:37:38,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:37:38,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:37:38,564 INFO L87 Difference]: Start difference. First operand 110160 states and 172452 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)