./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product24.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d9a9e332bba43f0e6d965514fc764881b170e0a0500d860d4fcce12986d98914 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:21:13,400 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:21:13,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:21:13,436 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:21:13,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:21:13,438 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:21:13,440 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:21:13,442 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:21:13,445 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:21:13,446 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:21:13,447 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:21:13,449 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:21:13,449 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:21:13,451 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:21:13,452 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:21:13,454 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:21:13,455 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:21:13,456 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:21:13,461 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:21:13,466 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:21:13,476 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:21:13,477 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:21:13,479 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:21:13,480 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:21:13,483 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:21:13,484 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:21:13,484 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:21:13,486 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:21:13,486 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:21:13,487 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:21:13,488 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:21:13,489 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:21:13,490 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:21:13,491 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:21:13,492 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:21:13,493 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:21:13,494 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:21:13,494 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:21:13,495 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:21:13,496 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:21:13,497 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:21:13,498 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:21:13,527 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:21:13,527 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:21:13,527 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:21:13,527 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:21:13,528 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:21:13,528 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:21:13,529 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:21:13,529 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:21:13,529 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:21:13,529 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:21:13,530 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:21:13,530 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:21:13,530 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:21:13,530 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:21:13,531 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:21:13,531 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:21:13,531 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:21:13,531 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:21:13,532 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:21:13,532 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:21:13,532 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:21:13,533 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:21:13,533 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:21:13,533 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:21:13,533 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:21:13,534 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:21:13,534 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:21:13,534 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:21:13,534 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:21:13,535 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:21:13,535 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:21:13,535 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:21:13,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:21:13,536 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:21:13,536 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:21:13,536 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:21:13,536 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:21:13,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:21:13,542 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:21:13,542 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:21:13,542 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:21:13,542 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_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d9a9e332bba43f0e6d965514fc764881b170e0a0500d860d4fcce12986d98914 [2021-11-25 20:21:13,818 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:21:13,843 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:21:13,846 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:21:13,847 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:21:13,848 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:21:13,850 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/product-lines/elevator_spec14_product24.cil.c [2021-11-25 20:21:13,912 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/data/892c8b76e/9aee46c9fc514a06a2028e70067581f4/FLAG632698a68 [2021-11-25 20:21:14,483 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:21:14,483 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/sv-benchmarks/c/product-lines/elevator_spec14_product24.cil.c [2021-11-25 20:21:14,535 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/data/892c8b76e/9aee46c9fc514a06a2028e70067581f4/FLAG632698a68 [2021-11-25 20:21:14,733 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/data/892c8b76e/9aee46c9fc514a06a2028e70067581f4 [2021-11-25 20:21:14,735 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:21:14,736 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:21:14,738 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:21:14,738 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:21:14,742 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:21:14,742 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:21:14" (1/1) ... [2021-11-25 20:21:14,743 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4210cda7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:14, skipping insertion in model container [2021-11-25 20:21:14,744 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:21:14" (1/1) ... [2021-11-25 20:21:14,750 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:21:14,855 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:21:15,499 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_7aa50b09-f961-4115-a9d3-5f5b7213bd50/sv-benchmarks/c/product-lines/elevator_spec14_product24.cil.c[71679,71692] [2021-11-25 20:21:15,503 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:21:15,520 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:21:15,695 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_7aa50b09-f961-4115-a9d3-5f5b7213bd50/sv-benchmarks/c/product-lines/elevator_spec14_product24.cil.c[71679,71692] [2021-11-25 20:21:15,696 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:21:15,729 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:21:15,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:15 WrapperNode [2021-11-25 20:21:15,730 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:21:15,731 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:21:15,731 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:21:15,731 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:21:15,739 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:15" (1/1) ... [2021-11-25 20:21:15,791 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:15" (1/1) ... [2021-11-25 20:21:15,870 INFO L137 Inliner]: procedures = 95, calls = 346, calls flagged for inlining = 27, calls inlined = 23, statements flattened = 863 [2021-11-25 20:21:15,872 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:21:15,873 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:21:15,874 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:21:15,874 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:21:15,882 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:15" (1/1) ... [2021-11-25 20:21:15,883 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:15" (1/1) ... [2021-11-25 20:21:15,905 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:15" (1/1) ... [2021-11-25 20:21:15,905 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:15" (1/1) ... [2021-11-25 20:21:15,969 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:15" (1/1) ... [2021-11-25 20:21:15,983 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:15" (1/1) ... [2021-11-25 20:21:15,988 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:15" (1/1) ... [2021-11-25 20:21:15,997 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:21:15,998 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:21:15,998 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:21:15,999 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:21:16,000 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:15" (1/1) ... [2021-11-25 20:21:16,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:21:16,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:21:16,058 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:21:16,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:21:16,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:21:16,098 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-25 20:21:16,098 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-25 20:21:16,099 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-25 20:21:16,099 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-25 20:21:16,099 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-25 20:21:16,099 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-25 20:21:16,099 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-25 20:21:16,100 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-25 20:21:16,100 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-25 20:21:16,100 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-25 20:21:16,100 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-25 20:21:16,100 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-25 20:21:16,100 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-25 20:21:16,101 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-25 20:21:16,101 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-25 20:21:16,101 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-25 20:21:16,101 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-25 20:21:16,101 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-25 20:21:16,102 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-25 20:21:16,102 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-25 20:21:16,102 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-25 20:21:16,102 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-25 20:21:16,102 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-25 20:21:16,102 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-25 20:21:16,103 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-25 20:21:16,103 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-25 20:21:16,103 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-25 20:21:16,103 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-25 20:21:16,103 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-25 20:21:16,104 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-25 20:21:16,104 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-25 20:21:16,104 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-25 20:21:16,104 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-25 20:21:16,104 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-25 20:21:16,104 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-25 20:21:16,105 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-25 20:21:16,105 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-25 20:21:16,105 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-25 20:21:16,105 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-25 20:21:16,105 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-25 20:21:16,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:21:16,106 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-25 20:21:16,106 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-25 20:21:16,106 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-25 20:21:16,106 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-25 20:21:16,106 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-25 20:21:16,107 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-25 20:21:16,107 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-25 20:21:16,107 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-25 20:21:16,107 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2021-11-25 20:21:16,107 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2021-11-25 20:21:16,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:21:16,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:21:16,108 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-25 20:21:16,108 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-25 20:21:16,108 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2021-11-25 20:21:16,109 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2021-11-25 20:21:16,330 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:21:16,333 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:21:17,388 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:21:18,031 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:21:18,031 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 20:21:18,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:21:18 BoogieIcfgContainer [2021-11-25 20:21:18,036 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:21:18,040 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:21:18,040 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:21:18,047 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:21:18,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:21:14" (1/3) ... [2021-11-25 20:21:18,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47c90d32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:21:18, skipping insertion in model container [2021-11-25 20:21:18,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:15" (2/3) ... [2021-11-25 20:21:18,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47c90d32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:21:18, skipping insertion in model container [2021-11-25 20:21:18,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:21:18" (3/3) ... [2021-11-25 20:21:18,053 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product24.cil.c [2021-11-25 20:21:18,062 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:21:18,063 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:21:18,131 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:21:18,140 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:21:18,141 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:21:18,189 INFO L276 IsEmpty]: Start isEmpty. Operand has 389 states, 257 states have (on average 1.5447470817120623) internal successors, (397), 275 states have internal predecessors, (397), 103 states have call successors, (103), 27 states have call predecessors, (103), 27 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-25 20:21:18,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-25 20:21:18,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:18,207 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] [2021-11-25 20:21:18,207 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:21:18,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:18,214 INFO L85 PathProgramCache]: Analyzing trace with hash -2092141041, now seen corresponding path program 1 times [2021-11-25 20:21:18,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:18,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055415757] [2021-11-25 20:21:18,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:18,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:18,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:18,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 20:21:18,788 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:18,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055415757] [2021-11-25 20:21:18,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055415757] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:18,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:18,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:21:18,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629908053] [2021-11-25 20:21:18,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:18,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:21:18,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:18,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:21:18,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:21:18,844 INFO L87 Difference]: Start difference. First operand has 389 states, 257 states have (on average 1.5447470817120623) internal successors, (397), 275 states have internal predecessors, (397), 103 states have call successors, (103), 27 states have call predecessors, (103), 27 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-25 20:21:19,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:19,349 INFO L93 Difference]: Finished difference Result 1143 states and 1798 transitions. [2021-11-25 20:21:19,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:21:19,357 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 43 [2021-11-25 20:21:19,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:19,394 INFO L225 Difference]: With dead ends: 1143 [2021-11-25 20:21:19,394 INFO L226 Difference]: Without dead ends: 755 [2021-11-25 20:21:19,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:21:19,410 INFO L933 BasicCegarLoop]: 709 mSDtfsCounter, 577 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 1254 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:19,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [577 Valid, 1254 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:21:19,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-11-25 20:21:19,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 719. [2021-11-25 20:21:19,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 489 states have (on average 1.5460122699386503) internal successors, (756), 515 states have internal predecessors, (756), 182 states have call successors, (182), 49 states have call predecessors, (182), 47 states have return successors, (187), 169 states have call predecessors, (187), 180 states have call successors, (187) [2021-11-25 20:21:19,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 1125 transitions. [2021-11-25 20:21:19,592 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 1125 transitions. Word has length 43 [2021-11-25 20:21:19,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:19,593 INFO L470 AbstractCegarLoop]: Abstraction has 719 states and 1125 transitions. [2021-11-25 20:21:19,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-25 20:21:19,594 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 1125 transitions. [2021-11-25 20:21:19,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-25 20:21:19,612 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:19,613 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:21:19,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:21:19,614 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:21:19,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:19,616 INFO L85 PathProgramCache]: Analyzing trace with hash -606032063, now seen corresponding path program 1 times [2021-11-25 20:21:19,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:19,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501075910] [2021-11-25 20:21:19,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:19,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:19,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:19,850 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-25 20:21:19,850 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:19,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501075910] [2021-11-25 20:21:19,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501075910] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:21:19,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917984928] [2021-11-25 20:21:19,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:19,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:21:19,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:21:19,866 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:21:19,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:21:20,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:20,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 1387 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 20:21:20,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:21:20,526 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-25 20:21:20,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:21:20,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917984928] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:20,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:21:20,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2021-11-25 20:21:20,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029700313] [2021-11-25 20:21:20,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:20,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:21:20,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:20,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:21:20,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-25 20:21:20,536 INFO L87 Difference]: Start difference. First operand 719 states and 1125 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-25 20:21:21,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:21,147 INFO L93 Difference]: Finished difference Result 1692 states and 2622 transitions. [2021-11-25 20:21:21,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:21:21,149 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 86 [2021-11-25 20:21:21,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:21,162 INFO L225 Difference]: With dead ends: 1692 [2021-11-25 20:21:21,162 INFO L226 Difference]: Without dead ends: 984 [2021-11-25 20:21:21,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:21:21,169 INFO L933 BasicCegarLoop]: 651 mSDtfsCounter, 391 mSDsluCounter, 1953 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 2475 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:21,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 2475 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 20:21:21,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2021-11-25 20:21:21,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 970. [2021-11-25 20:21:21,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 970 states, 645 states have (on average 1.4806201550387597) internal successors, (955), 672 states have internal predecessors, (955), 249 states have call successors, (249), 75 states have call predecessors, (249), 75 states have return successors, (279), 236 states have call predecessors, (279), 245 states have call successors, (279) [2021-11-25 20:21:21,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 1483 transitions. [2021-11-25 20:21:21,265 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 1483 transitions. Word has length 86 [2021-11-25 20:21:21,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:21,265 INFO L470 AbstractCegarLoop]: Abstraction has 970 states and 1483 transitions. [2021-11-25 20:21:21,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-25 20:21:21,266 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 1483 transitions. [2021-11-25 20:21:21,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-25 20:21:21,270 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:21,270 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:21:21,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:21:21,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-25 20:21:21,483 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:21:21,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:21,484 INFO L85 PathProgramCache]: Analyzing trace with hash 2075770555, now seen corresponding path program 1 times [2021-11-25 20:21:21,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:21,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058279795] [2021-11-25 20:21:21,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:21,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:21,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:21,704 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 20:21:21,705 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:21,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058279795] [2021-11-25 20:21:21,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058279795] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:21,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:21,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:21:21,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974645539] [2021-11-25 20:21:21,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:21,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:21:21,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:21,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:21:21,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:21:21,714 INFO L87 Difference]: Start difference. First operand 970 states and 1483 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-25 20:21:24,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:24,136 INFO L93 Difference]: Finished difference Result 2917 states and 4521 transitions. [2021-11-25 20:21:24,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 20:21:24,137 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 87 [2021-11-25 20:21:24,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:24,156 INFO L225 Difference]: With dead ends: 2917 [2021-11-25 20:21:24,156 INFO L226 Difference]: Without dead ends: 1960 [2021-11-25 20:21:24,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:21:24,166 INFO L933 BasicCegarLoop]: 580 mSDtfsCounter, 1129 mSDsluCounter, 1072 mSDsCounter, 0 mSdLazyCounter, 2533 mSolverCounterSat, 501 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1224 SdHoareTripleChecker+Valid, 1565 SdHoareTripleChecker+Invalid, 3034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 501 IncrementalHoareTripleChecker+Valid, 2533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:24,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1224 Valid, 1565 Invalid, 3034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [501 Valid, 2533 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-25 20:21:24,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2021-11-25 20:21:24,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1716. [2021-11-25 20:21:24,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 1155 states have (on average 1.503030303030303) internal successors, (1736), 1205 states have internal predecessors, (1736), 427 states have call successors, (427), 131 states have call predecessors, (427), 133 states have return successors, (485), 406 states have call predecessors, (485), 421 states have call successors, (485) [2021-11-25 20:21:24,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 2648 transitions. [2021-11-25 20:21:24,291 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 2648 transitions. Word has length 87 [2021-11-25 20:21:24,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:24,292 INFO L470 AbstractCegarLoop]: Abstraction has 1716 states and 2648 transitions. [2021-11-25 20:21:24,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-25 20:21:24,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 2648 transitions. [2021-11-25 20:21:24,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-25 20:21:24,297 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:24,297 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:21:24,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 20:21:24,297 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:21:24,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:24,298 INFO L85 PathProgramCache]: Analyzing trace with hash 936116618, now seen corresponding path program 1 times [2021-11-25 20:21:24,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:24,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122114546] [2021-11-25 20:21:24,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:24,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:24,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:24,485 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-25 20:21:24,485 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:24,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122114546] [2021-11-25 20:21:24,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122114546] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:24,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:24,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-25 20:21:24,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621447791] [2021-11-25 20:21:24,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:24,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 20:21:24,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:24,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 20:21:24,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:21:24,488 INFO L87 Difference]: Start difference. First operand 1716 states and 2648 transitions. Second operand has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-25 20:21:27,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:27,147 INFO L93 Difference]: Finished difference Result 2094 states and 3320 transitions. [2021-11-25 20:21:27,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 20:21:27,148 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 91 [2021-11-25 20:21:27,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:27,165 INFO L225 Difference]: With dead ends: 2094 [2021-11-25 20:21:27,165 INFO L226 Difference]: Without dead ends: 2092 [2021-11-25 20:21:27,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-11-25 20:21:27,168 INFO L933 BasicCegarLoop]: 732 mSDtfsCounter, 1459 mSDsluCounter, 1758 mSDsCounter, 0 mSdLazyCounter, 3048 mSolverCounterSat, 865 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1481 SdHoareTripleChecker+Valid, 2368 SdHoareTripleChecker+Invalid, 3913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 865 IncrementalHoareTripleChecker+Valid, 3048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:27,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1481 Valid, 2368 Invalid, 3913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [865 Valid, 3048 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-25 20:21:27,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2021-11-25 20:21:27,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 1896. [2021-11-25 20:21:27,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1249 states have (on average 1.4939951961569256) internal successors, (1866), 1321 states have internal predecessors, (1866), 509 states have call successors, (509), 131 states have call predecessors, (509), 137 states have return successors, (569), 482 states have call predecessors, (569), 503 states have call successors, (569) [2021-11-25 20:21:27,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2944 transitions. [2021-11-25 20:21:27,313 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2944 transitions. Word has length 91 [2021-11-25 20:21:27,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:27,313 INFO L470 AbstractCegarLoop]: Abstraction has 1896 states and 2944 transitions. [2021-11-25 20:21:27,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-25 20:21:27,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2944 transitions. [2021-11-25 20:21:27,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-25 20:21:27,319 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:27,319 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:21:27,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 20:21:27,319 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:21:27,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:27,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1038855753, now seen corresponding path program 1 times [2021-11-25 20:21:27,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:27,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404197169] [2021-11-25 20:21:27,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:27,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:27,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:27,419 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-25 20:21:27,419 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:27,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404197169] [2021-11-25 20:21:27,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404197169] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:27,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:27,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:21:27,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953521287] [2021-11-25 20:21:27,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:27,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:21:27,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:27,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:21:27,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:21:27,422 INFO L87 Difference]: Start difference. First operand 1896 states and 2944 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-25 20:21:27,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:27,662 INFO L93 Difference]: Finished difference Result 3878 states and 6086 transitions. [2021-11-25 20:21:27,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:21:27,663 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 122 [2021-11-25 20:21:27,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:27,684 INFO L225 Difference]: With dead ends: 3878 [2021-11-25 20:21:27,684 INFO L226 Difference]: Without dead ends: 1994 [2021-11-25 20:21:27,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:21:27,703 INFO L933 BasicCegarLoop]: 563 mSDtfsCounter, 30 mSDsluCounter, 1162 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1654 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:27,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 1654 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:21:27,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1994 states. [2021-11-25 20:21:27,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1994 to 1908. [2021-11-25 20:21:27,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1908 states, 1261 states have (on average 1.4892942109436955) internal successors, (1878), 1333 states have internal predecessors, (1878), 509 states have call successors, (509), 131 states have call predecessors, (509), 137 states have return successors, (569), 482 states have call predecessors, (569), 503 states have call successors, (569) [2021-11-25 20:21:27,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 2956 transitions. [2021-11-25 20:21:27,878 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 2956 transitions. Word has length 122 [2021-11-25 20:21:27,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:27,880 INFO L470 AbstractCegarLoop]: Abstraction has 1908 states and 2956 transitions. [2021-11-25 20:21:27,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-25 20:21:27,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 2956 transitions. [2021-11-25 20:21:27,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-25 20:21:27,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:27,886 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:21:27,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 20:21:27,886 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:21:27,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:27,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1091976351, now seen corresponding path program 1 times [2021-11-25 20:21:27,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:27,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878535986] [2021-11-25 20:21:27,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:27,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:27,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:28,068 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-25 20:21:28,068 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:28,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878535986] [2021-11-25 20:21:28,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878535986] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:21:28,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642467516] [2021-11-25 20:21:28,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:28,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:21:28,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:21:28,073 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:21:28,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:21:28,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:28,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 1533 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:21:28,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:21:28,655 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-25 20:21:28,655 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:21:28,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642467516] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:28,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:21:28,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2021-11-25 20:21:28,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23356865] [2021-11-25 20:21:28,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:28,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:21:28,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:28,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:21:28,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-25 20:21:28,658 INFO L87 Difference]: Start difference. First operand 1908 states and 2956 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-25 20:21:29,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:29,030 INFO L93 Difference]: Finished difference Result 3960 states and 6260 transitions. [2021-11-25 20:21:29,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:21:29,030 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 129 [2021-11-25 20:21:29,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:29,056 INFO L225 Difference]: With dead ends: 3960 [2021-11-25 20:21:29,056 INFO L226 Difference]: Without dead ends: 2064 [2021-11-25 20:21:29,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-25 20:21:29,076 INFO L933 BasicCegarLoop]: 490 mSDtfsCounter, 213 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:29,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 1446 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:21:29,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2064 states. [2021-11-25 20:21:29,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2064 to 2064. [2021-11-25 20:21:29,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 1413 states have (on average 1.5357395612172682) internal successors, (2170), 1485 states have internal predecessors, (2170), 509 states have call successors, (509), 135 states have call predecessors, (509), 141 states have return successors, (569), 482 states have call predecessors, (569), 503 states have call successors, (569) [2021-11-25 20:21:29,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 3248 transitions. [2021-11-25 20:21:29,224 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 3248 transitions. Word has length 129 [2021-11-25 20:21:29,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:29,228 INFO L470 AbstractCegarLoop]: Abstraction has 2064 states and 3248 transitions. [2021-11-25 20:21:29,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-25 20:21:29,228 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 3248 transitions. [2021-11-25 20:21:29,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-25 20:21:29,239 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:29,239 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:21:29,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:21:29,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:21:29,465 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:21:29,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:29,466 INFO L85 PathProgramCache]: Analyzing trace with hash 50136334, now seen corresponding path program 1 times [2021-11-25 20:21:29,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:29,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094857481] [2021-11-25 20:21:29,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:29,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:29,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:29,592 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-25 20:21:29,593 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:29,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094857481] [2021-11-25 20:21:29,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094857481] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:21:29,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617586132] [2021-11-25 20:21:29,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:29,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:21:29,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:21:29,595 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:21:29,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 20:21:29,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:29,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 1538 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:21:29,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:21:30,085 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-25 20:21:30,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:21:30,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617586132] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:30,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:21:30,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-25 20:21:30,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165263460] [2021-11-25 20:21:30,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:30,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:21:30,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:30,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:21:30,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:21:30,088 INFO L87 Difference]: Start difference. First operand 2064 states and 3248 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-25 20:21:30,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:30,417 INFO L93 Difference]: Finished difference Result 4272 states and 6838 transitions. [2021-11-25 20:21:30,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:21:30,417 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 134 [2021-11-25 20:21:30,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:30,471 INFO L225 Difference]: With dead ends: 4272 [2021-11-25 20:21:30,471 INFO L226 Difference]: Without dead ends: 2220 [2021-11-25 20:21:30,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:21:30,485 INFO L933 BasicCegarLoop]: 490 mSDtfsCounter, 211 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:30,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 1446 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:21:30,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2220 states. [2021-11-25 20:21:30,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 2220. [2021-11-25 20:21:30,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2220 states, 1565 states have (on average 1.5731629392971247) internal successors, (2462), 1637 states have internal predecessors, (2462), 509 states have call successors, (509), 139 states have call predecessors, (509), 145 states have return successors, (569), 482 states have call predecessors, (569), 503 states have call successors, (569) [2021-11-25 20:21:30,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2220 states to 2220 states and 3540 transitions. [2021-11-25 20:21:30,619 INFO L78 Accepts]: Start accepts. Automaton has 2220 states and 3540 transitions. Word has length 134 [2021-11-25 20:21:30,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:30,620 INFO L470 AbstractCegarLoop]: Abstraction has 2220 states and 3540 transitions. [2021-11-25 20:21:30,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-25 20:21:30,620 INFO L276 IsEmpty]: Start isEmpty. Operand 2220 states and 3540 transitions. [2021-11-25 20:21:30,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-25 20:21:30,627 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:30,628 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:21:30,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 20:21:30,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:21:30,841 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:21:30,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:30,841 INFO L85 PathProgramCache]: Analyzing trace with hash -674665858, now seen corresponding path program 1 times [2021-11-25 20:21:30,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:30,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273827635] [2021-11-25 20:21:30,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:30,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:30,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:30,951 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-25 20:21:30,951 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:30,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273827635] [2021-11-25 20:21:30,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273827635] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:21:30,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077186204] [2021-11-25 20:21:30,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:30,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:21:30,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:21:30,953 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:21:30,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 20:21:31,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:31,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 1542 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:21:31,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:21:31,453 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-25 20:21:31,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:21:31,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077186204] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:31,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:21:31,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-25 20:21:31,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066812357] [2021-11-25 20:21:31,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:31,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:21:31,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:31,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:21:31,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:21:31,456 INFO L87 Difference]: Start difference. First operand 2220 states and 3540 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-25 20:21:31,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:31,778 INFO L93 Difference]: Finished difference Result 4584 states and 7416 transitions. [2021-11-25 20:21:31,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:21:31,778 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 138 [2021-11-25 20:21:31,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:31,799 INFO L225 Difference]: With dead ends: 4584 [2021-11-25 20:21:31,799 INFO L226 Difference]: Without dead ends: 2376 [2021-11-25 20:21:31,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:21:31,814 INFO L933 BasicCegarLoop]: 490 mSDtfsCounter, 209 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:31,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 1446 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:21:31,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2021-11-25 20:21:31,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 2376. [2021-11-25 20:21:31,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2376 states, 1717 states have (on average 1.603960396039604) internal successors, (2754), 1789 states have internal predecessors, (2754), 509 states have call successors, (509), 143 states have call predecessors, (509), 149 states have return successors, (569), 482 states have call predecessors, (569), 503 states have call successors, (569) [2021-11-25 20:21:31,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2376 states to 2376 states and 3832 transitions. [2021-11-25 20:21:31,988 INFO L78 Accepts]: Start accepts. Automaton has 2376 states and 3832 transitions. Word has length 138 [2021-11-25 20:21:31,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:31,989 INFO L470 AbstractCegarLoop]: Abstraction has 2376 states and 3832 transitions. [2021-11-25 20:21:31,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-25 20:21:31,990 INFO L276 IsEmpty]: Start isEmpty. Operand 2376 states and 3832 transitions. [2021-11-25 20:21:31,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-25 20:21:31,997 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:31,997 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:21:32,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:21:32,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:21:32,223 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:21:32,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:32,224 INFO L85 PathProgramCache]: Analyzing trace with hash -882160895, now seen corresponding path program 1 times [2021-11-25 20:21:32,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:32,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407472] [2021-11-25 20:21:32,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:32,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:32,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:32,320 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-25 20:21:32,320 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:32,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407472] [2021-11-25 20:21:32,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407472] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:21:32,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56039310] [2021-11-25 20:21:32,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:32,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:21:32,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:21:32,322 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:21:32,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 20:21:32,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:32,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 1545 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:21:32,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:21:32,873 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-25 20:21:32,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:21:32,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56039310] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:32,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:21:32,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-25 20:21:32,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116737308] [2021-11-25 20:21:32,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:32,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:21:32,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:32,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:21:32,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:21:32,877 INFO L87 Difference]: Start difference. First operand 2376 states and 3832 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-25 20:21:33,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:33,234 INFO L93 Difference]: Finished difference Result 4896 states and 7994 transitions. [2021-11-25 20:21:33,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:21:33,235 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 141 [2021-11-25 20:21:33,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:33,255 INFO L225 Difference]: With dead ends: 4896 [2021-11-25 20:21:33,255 INFO L226 Difference]: Without dead ends: 2532 [2021-11-25 20:21:33,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:21:33,271 INFO L933 BasicCegarLoop]: 490 mSDtfsCounter, 207 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:33,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 1446 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:21:33,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2021-11-25 20:21:33,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 2532. [2021-11-25 20:21:33,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2532 states, 1869 states have (on average 1.6297485286249331) internal successors, (3046), 1941 states have internal predecessors, (3046), 509 states have call successors, (509), 147 states have call predecessors, (509), 153 states have return successors, (569), 482 states have call predecessors, (569), 503 states have call successors, (569) [2021-11-25 20:21:33,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2532 states to 2532 states and 4124 transitions. [2021-11-25 20:21:33,464 INFO L78 Accepts]: Start accepts. Automaton has 2532 states and 4124 transitions. Word has length 141 [2021-11-25 20:21:33,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:33,465 INFO L470 AbstractCegarLoop]: Abstraction has 2532 states and 4124 transitions. [2021-11-25 20:21:33,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-25 20:21:33,466 INFO L276 IsEmpty]: Start isEmpty. Operand 2532 states and 4124 transitions. [2021-11-25 20:21:33,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-25 20:21:33,473 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:33,474 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:21:33,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 20:21:33,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:21:33,686 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:21:33,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:33,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1589442225, now seen corresponding path program 1 times [2021-11-25 20:21:33,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:33,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484629223] [2021-11-25 20:21:33,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:33,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:33,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:33,787 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-25 20:21:33,787 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:33,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484629223] [2021-11-25 20:21:33,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484629223] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:33,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:33,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:21:33,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615258439] [2021-11-25 20:21:33,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:33,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:21:33,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:33,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:21:33,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:21:33,790 INFO L87 Difference]: Start difference. First operand 2532 states and 4124 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (20), 1 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-25 20:21:34,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:34,135 INFO L93 Difference]: Finished difference Result 5220 states and 8578 transitions. [2021-11-25 20:21:34,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:21:34,136 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (20), 1 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 143 [2021-11-25 20:21:34,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:34,157 INFO L225 Difference]: With dead ends: 5220 [2021-11-25 20:21:34,157 INFO L226 Difference]: Without dead ends: 2668 [2021-11-25 20:21:34,172 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 [2021-11-25 20:21:34,173 INFO L933 BasicCegarLoop]: 503 mSDtfsCounter, 99 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1459 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:34,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 1459 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:21:34,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2668 states. [2021-11-25 20:21:34,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2668 to 2668. [2021-11-25 20:21:34,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2668 states, 2001 states have (on average 1.5582208895552223) internal successors, (3118), 2073 states have internal predecessors, (3118), 509 states have call successors, (509), 151 states have call predecessors, (509), 157 states have return successors, (569), 482 states have call predecessors, (569), 503 states have call successors, (569) [2021-11-25 20:21:34,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2668 states to 2668 states and 4196 transitions. [2021-11-25 20:21:34,319 INFO L78 Accepts]: Start accepts. Automaton has 2668 states and 4196 transitions. Word has length 143 [2021-11-25 20:21:34,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:34,320 INFO L470 AbstractCegarLoop]: Abstraction has 2668 states and 4196 transitions. [2021-11-25 20:21:34,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (20), 1 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-25 20:21:34,321 INFO L276 IsEmpty]: Start isEmpty. Operand 2668 states and 4196 transitions. [2021-11-25 20:21:34,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-25 20:21:34,327 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:34,328 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:21:34,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 20:21:34,328 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:21:34,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:34,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1677741408, now seen corresponding path program 1 times [2021-11-25 20:21:34,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:34,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903538116] [2021-11-25 20:21:34,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:34,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:34,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:34,500 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-25 20:21:34,501 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:34,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903538116] [2021-11-25 20:21:34,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903538116] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:34,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:34,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 20:21:34,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595918643] [2021-11-25 20:21:34,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:34,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:21:34,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:34,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:21:34,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:21:34,504 INFO L87 Difference]: Start difference. First operand 2668 states and 4196 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 6 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2021-11-25 20:21:37,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:37,927 INFO L93 Difference]: Finished difference Result 6865 states and 10989 transitions. [2021-11-25 20:21:37,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 20:21:37,928 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 6 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 143 [2021-11-25 20:21:37,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:37,968 INFO L225 Difference]: With dead ends: 6865 [2021-11-25 20:21:37,968 INFO L226 Difference]: Without dead ends: 3844 [2021-11-25 20:21:37,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-11-25 20:21:37,984 INFO L933 BasicCegarLoop]: 812 mSDtfsCounter, 1652 mSDsluCounter, 1852 mSDsCounter, 0 mSdLazyCounter, 4054 mSolverCounterSat, 903 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1718 SdHoareTripleChecker+Valid, 2533 SdHoareTripleChecker+Invalid, 4957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 903 IncrementalHoareTripleChecker+Valid, 4054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:37,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1718 Valid, 2533 Invalid, 4957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [903 Valid, 4054 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-25 20:21:37,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3844 states. [2021-11-25 20:21:38,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3844 to 3666. [2021-11-25 20:21:38,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3666 states, 2616 states have (on average 1.480886850152905) internal successors, (3874), 2746 states have internal predecessors, (3874), 793 states have call successors, (793), 231 states have call predecessors, (793), 256 states have return successors, (988), 745 states have call predecessors, (988), 787 states have call successors, (988) [2021-11-25 20:21:38,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3666 states to 3666 states and 5655 transitions. [2021-11-25 20:21:38,205 INFO L78 Accepts]: Start accepts. Automaton has 3666 states and 5655 transitions. Word has length 143 [2021-11-25 20:21:38,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:38,206 INFO L470 AbstractCegarLoop]: Abstraction has 3666 states and 5655 transitions. [2021-11-25 20:21:38,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 6 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2021-11-25 20:21:38,206 INFO L276 IsEmpty]: Start isEmpty. Operand 3666 states and 5655 transitions. [2021-11-25 20:21:38,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-25 20:21:38,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:38,214 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:21:38,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 20:21:38,214 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:21:38,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:38,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1681205074, now seen corresponding path program 1 times [2021-11-25 20:21:38,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:38,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921561793] [2021-11-25 20:21:38,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:38,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:38,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:39,792 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-25 20:21:39,792 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:39,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921561793] [2021-11-25 20:21:39,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921561793] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:21:39,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23893658] [2021-11-25 20:21:39,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:39,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:21:39,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:21:39,800 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:21:39,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 20:21:40,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:40,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 1548 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-25 20:21:40,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:21:41,952 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-25 20:21:41,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:22:25,956 WARN L227 SmtUtils]: Spent 40.63s on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 234] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-25 20:23:07,674 WARN L227 SmtUtils]: Spent 40.19s on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 234] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-25 20:23:09,666 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-25 20:23:09,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23893658] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:23:09,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [106071390] [2021-11-25 20:23:09,690 INFO L159 IcfgInterpreter]: Started Sifa with 100 locations of interest [2021-11-25 20:23:09,691 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:23:09,699 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:23:09,704 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:23:09,705 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:23:12,412 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 578 for LOIs [2021-11-25 20:23:18,392 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 577 for LOIs [2021-11-25 20:23:39,444 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 511 for LOIs [2021-11-25 20:23:42,149 INFO L197 IcfgInterpreter]: Interpreting procedure areDoorsOpen with input of size 506 for LOIs [2021-11-25 20:23:42,297 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 503 for LOIs [2021-11-25 20:23:43,264 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 459 for LOIs [2021-11-25 20:23:43,378 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 47 for LOIs [2021-11-25 20:23:43,383 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 579 for LOIs [2021-11-25 20:23:46,598 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 583 for LOIs [2021-11-25 20:23:47,117 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 511 for LOIs [2021-11-25 20:23:47,256 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull with input of size 446 for LOIs [2021-11-25 20:23:48,350 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 47 for LOIs [2021-11-25 20:23:48,362 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:24:06,933 WARN L227 SmtUtils]: Spent 5.33s on a formula simplification. DAG size of input: 651 DAG size of output: 598 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:24:12,963 WARN L227 SmtUtils]: Spent 5.44s on a formula simplification. DAG size of input: 651 DAG size of output: 598 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:27:38,523 WARN L227 SmtUtils]: Spent 7.77s on a formula simplification. DAG size of input: 709 DAG size of output: 603 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:27:51,044 WARN L227 SmtUtils]: Spent 8.74s on a formula simplification. DAG size of input: 733 DAG size of output: 596 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:27:57,668 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '90648#(and (= |old(~floorButtons_2~0)| 0) (= ~doorState~0 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~1#1|) (= ~executiveFloor~0 4) (= |old(~persons_1~0)| 0) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~1#1| 2147483647) (= |old(~persons_5~0)| 0) (<= 1 |timeShift_~tmp~23#1|) (= |old(~doorState~0)| 1) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~9#1|) (= |old(~persons_2~0)| 0) (= ~persons_5~0 0) (= |old(~persons_4~0)| 0) (= |old(~floorButtons_0~0)| 0) (<= ~floorButtons_0~0 0) (= |old(~blocked~0)| 0) (<= ~calls_0~0 0) (= ~head~0.offset 0) (= |old(~weight~0)| 0) (<= |timeShift_isExecutiveFloor_~floorID#1| 0) (= ~persons_4~0 0) (= |timeShift___utac_acc__Specification14_spec__1_~tmp~9#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= 0 |timeShift_isExecutiveFloor_#in~floorID#1|) (<= |timeShift_~tmp~23#1| 1) (<= |timeShift_isExecutiveFloor_#in~floorID#1| 0) (= ~persons_3~0 0) (= |old(~floorButtons_4~0)| 0) (= |old(~persons_0~0)| 0) (<= 0 ~floorButtons_0~0) (<= 0 |timeShift_isExecutiveFloor_#res#1|) (= ~doorState~0 1) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1| 0) (<= 0 ~calls_0~0) (= |old(~persons_3~0)| 0) (= ~persons_1~0 0) (= ~persons_0~0 0) (= |old(~floorButtons_3~0)| 0) (<= 0 |timeShift_isExecutiveFloor_~floorID#1|) (= ~head~0.base 0) (= |#NULL.offset| 0) (<= |timeShift_isExecutiveFloor_~retValue_acc~20#1| 0) (= |timeShift_isExecutiveFloor_~retValue_acc~20#1| |timeShift_isExecutiveFloor_#res#1|) (= ~blocked~0 0) (= |old(~currentHeading~0)| 1) (= |old(~personOnFloor_5_1~0)| 1) (= 1 |old(~calls_1~0)|) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~1#1| 0)) (= |old(~floorButtons_1~0)| 0) (= |old(~currentFloorID~0)| 0) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~1#1|)) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0) (= ~persons_2~0 0))' at error location [2021-11-25 20:27:57,668 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:27:57,668 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:27:57,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 16, 16] total 68 [2021-11-25 20:27:57,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040395706] [2021-11-25 20:27:57,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:27:57,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-25 20:27:57,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:27:57,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-25 20:27:57,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1308, Invalid=16782, Unknown=0, NotChecked=0, Total=18090 [2021-11-25 20:27:57,676 INFO L87 Difference]: Start difference. First operand 3666 states and 5655 transitions. Second operand has 68 states, 51 states have (on average 4.078431372549019) internal successors, (208), 53 states have internal predecessors, (208), 21 states have call successors, (57), 10 states have call predecessors, (57), 28 states have return successors, (57), 29 states have call predecessors, (57), 21 states have call successors, (57) [2021-11-25 20:31:26,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:26,322 INFO L93 Difference]: Finished difference Result 37426 states and 64235 transitions. [2021-11-25 20:31:26,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 729 states. [2021-11-25 20:31:26,323 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 51 states have (on average 4.078431372549019) internal successors, (208), 53 states have internal predecessors, (208), 21 states have call successors, (57), 10 states have call predecessors, (57), 28 states have return successors, (57), 29 states have call predecessors, (57), 21 states have call successors, (57) Word has length 144 [2021-11-25 20:31:26,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:26,522 INFO L225 Difference]: With dead ends: 37426 [2021-11-25 20:31:26,523 INFO L226 Difference]: Without dead ends: 29299 [2021-11-25 20:31:26,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1278 GetRequests, 397 SyntacticMatches, 25 SemanticMatches, 856 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319482 ImplicationChecksByTransitivity, 363.8s TimeCoverageRelationStatistics Valid=40594, Invalid=694712, Unknown=0, NotChecked=0, Total=735306 [2021-11-25 20:31:26,662 INFO L933 BasicCegarLoop]: 1532 mSDtfsCounter, 28780 mSDsluCounter, 26184 mSDsCounter, 0 mSdLazyCounter, 153434 mSolverCounterSat, 26648 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 78.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28829 SdHoareTripleChecker+Valid, 25379 SdHoareTripleChecker+Invalid, 180082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.5s SdHoareTripleChecker+Time, 26648 IncrementalHoareTripleChecker+Valid, 153434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 90.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:26,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28829 Valid, 25379 Invalid, 180082 Unknown, 0 Unchecked, 0.5s Time], IncrementalHoareTripleChecker [26648 Valid, 153434 Invalid, 0 Unknown, 0 Unchecked, 90.9s Time] [2021-11-25 20:31:26,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29299 states. [2021-11-25 20:31:28,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29299 to 21353. [2021-11-25 20:31:28,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21353 states, 16779 states have (on average 1.4706478336015256) internal successors, (24676), 17544 states have internal predecessors, (24676), 3152 states have call successors, (3152), 1136 states have call predecessors, (3152), 1421 states have return successors, (4304), 2880 states have call predecessors, (4304), 3144 states have call successors, (4304) [2021-11-25 20:31:29,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21353 states to 21353 states and 32132 transitions. [2021-11-25 20:31:29,197 INFO L78 Accepts]: Start accepts. Automaton has 21353 states and 32132 transitions. Word has length 144 [2021-11-25 20:31:29,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:29,200 INFO L470 AbstractCegarLoop]: Abstraction has 21353 states and 32132 transitions. [2021-11-25 20:31:29,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 51 states have (on average 4.078431372549019) internal successors, (208), 53 states have internal predecessors, (208), 21 states have call successors, (57), 10 states have call predecessors, (57), 28 states have return successors, (57), 29 states have call predecessors, (57), 21 states have call successors, (57) [2021-11-25 20:31:29,200 INFO L276 IsEmpty]: Start isEmpty. Operand 21353 states and 32132 transitions. [2021-11-25 20:31:29,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-25 20:31:29,234 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:29,234 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:31:29,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 20:31:29,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-25 20:31:29,457 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:29,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:29,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1297393426, now seen corresponding path program 1 times [2021-11-25 20:31:29,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:29,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642690563] [2021-11-25 20:31:29,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:29,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:29,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:29,597 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-25 20:31:29,598 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:29,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642690563] [2021-11-25 20:31:29,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642690563] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:31:29,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638514565] [2021-11-25 20:31:29,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:29,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:31:29,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:31:29,600 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:31:29,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 20:31:29,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:29,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 1561 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 20:31:29,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:31:30,559 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-25 20:31:30,559 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:31:30,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638514565] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:30,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:31:30,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 16 [2021-11-25 20:31:30,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684024833] [2021-11-25 20:31:30,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:30,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 20:31:30,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:30,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 20:31:30,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-25 20:31:30,561 INFO L87 Difference]: Start difference. First operand 21353 states and 32132 transitions. Second operand has 10 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 6 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2021-11-25 20:31:35,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:35,378 INFO L93 Difference]: Finished difference Result 46289 states and 70463 transitions. [2021-11-25 20:31:35,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-25 20:31:35,379 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 6 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) Word has length 150 [2021-11-25 20:31:35,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:35,516 INFO L225 Difference]: With dead ends: 46289 [2021-11-25 20:31:35,516 INFO L226 Difference]: Without dead ends: 25003 [2021-11-25 20:31:35,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-11-25 20:31:35,605 INFO L933 BasicCegarLoop]: 762 mSDtfsCounter, 1440 mSDsluCounter, 1380 mSDsCounter, 0 mSdLazyCounter, 5655 mSolverCounterSat, 833 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1628 SdHoareTripleChecker+Valid, 2034 SdHoareTripleChecker+Invalid, 6488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 833 IncrementalHoareTripleChecker+Valid, 5655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:35,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1628 Valid, 2034 Invalid, 6488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [833 Valid, 5655 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-25 20:31:35,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25003 states. [2021-11-25 20:31:37,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25003 to 24089. [2021-11-25 20:31:37,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24089 states, 19199 states have (on average 1.470128652533986) internal successors, (28225), 20000 states have internal predecessors, (28225), 3307 states have call successors, (3307), 1260 states have call predecessors, (3307), 1582 states have return successors, (4670), 3032 states have call predecessors, (4670), 3297 states have call successors, (4670) [2021-11-25 20:31:37,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24089 states to 24089 states and 36202 transitions. [2021-11-25 20:31:37,411 INFO L78 Accepts]: Start accepts. Automaton has 24089 states and 36202 transitions. Word has length 150 [2021-11-25 20:31:37,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:37,411 INFO L470 AbstractCegarLoop]: Abstraction has 24089 states and 36202 transitions. [2021-11-25 20:31:37,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 6 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2021-11-25 20:31:37,411 INFO L276 IsEmpty]: Start isEmpty. Operand 24089 states and 36202 transitions. [2021-11-25 20:31:37,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-11-25 20:31:37,488 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:37,488 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:31:37,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 20:31:37,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-25 20:31:37,705 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:37,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:37,706 INFO L85 PathProgramCache]: Analyzing trace with hash 683019695, now seen corresponding path program 1 times [2021-11-25 20:31:37,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:37,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007862839] [2021-11-25 20:31:37,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:37,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:37,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:37,937 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-25 20:31:37,938 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:37,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007862839] [2021-11-25 20:31:37,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007862839] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:31:37,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719971693] [2021-11-25 20:31:37,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:37,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:31:37,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:31:37,941 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:31:37,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 20:31:38,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:38,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 2170 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 20:31:38,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:31:38,927 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-25 20:31:38,927 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:31:38,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719971693] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:38,928 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:31:38,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [16] total 24 [2021-11-25 20:31:38,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538333758] [2021-11-25 20:31:38,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:38,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 20:31:38,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:38,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 20:31:38,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-11-25 20:31:38,930 INFO L87 Difference]: Start difference. First operand 24089 states and 36202 transitions. Second operand has 10 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 4 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2021-11-25 20:31:42,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:42,546 INFO L93 Difference]: Finished difference Result 35520 states and 53477 transitions. [2021-11-25 20:31:42,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 20:31:42,547 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 4 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 215 [2021-11-25 20:31:42,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:42,633 INFO L225 Difference]: With dead ends: 35520 [2021-11-25 20:31:42,633 INFO L226 Difference]: Without dead ends: 17367 [2021-11-25 20:31:42,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2021-11-25 20:31:42,677 INFO L933 BasicCegarLoop]: 854 mSDtfsCounter, 1337 mSDsluCounter, 3446 mSDsCounter, 0 mSdLazyCounter, 3934 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1359 SdHoareTripleChecker+Valid, 3930 SdHoareTripleChecker+Invalid, 4233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 3934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:42,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1359 Valid, 3930 Invalid, 4233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 3934 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-25 20:31:42,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17367 states. [2021-11-25 20:31:43,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17367 to 17050. [2021-11-25 20:31:43,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17050 states, 12998 states have (on average 1.4556854900753962) internal successors, (18921), 13583 states have internal predecessors, (18921), 2802 states have call successors, (2802), 1078 states have call predecessors, (2802), 1249 states have return successors, (3865), 2559 states have call predecessors, (3865), 2792 states have call successors, (3865) [2021-11-25 20:31:43,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17050 states to 17050 states and 25588 transitions. [2021-11-25 20:31:43,926 INFO L78 Accepts]: Start accepts. Automaton has 17050 states and 25588 transitions. Word has length 215 [2021-11-25 20:31:43,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:43,927 INFO L470 AbstractCegarLoop]: Abstraction has 17050 states and 25588 transitions. [2021-11-25 20:31:43,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 4 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2021-11-25 20:31:43,927 INFO L276 IsEmpty]: Start isEmpty. Operand 17050 states and 25588 transitions. [2021-11-25 20:31:43,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2021-11-25 20:31:43,968 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:43,969 INFO L514 BasicCegarLoop]: trace histogram [15, 11, 11, 11, 11, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:31:44,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 20:31:44,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 20:31:44,187 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:44,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:44,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1792636964, now seen corresponding path program 1 times [2021-11-25 20:31:44,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:44,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883468305] [2021-11-25 20:31:44,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:44,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:44,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:44,401 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 22 proven. 43 refuted. 0 times theorem prover too weak. 705 trivial. 0 not checked. [2021-11-25 20:31:44,402 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:44,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883468305] [2021-11-25 20:31:44,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883468305] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:31:44,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764434862] [2021-11-25 20:31:44,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:44,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:31:44,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:31:44,404 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:31:44,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 20:31:45,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:45,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 3952 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 20:31:45,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:31:45,562 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 608 trivial. 0 not checked. [2021-11-25 20:31:45,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:31:45,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764434862] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:45,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:31:45,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-25 20:31:45,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272483844] [2021-11-25 20:31:45,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:45,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:31:45,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:45,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:31:45,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:31:45,564 INFO L87 Difference]: Start difference. First operand 17050 states and 25588 transitions. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 6 states have internal predecessors, (121), 2 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 3 states have call predecessors, (38), 2 states have call successors, (38) [2021-11-25 20:31:46,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:46,756 INFO L93 Difference]: Finished difference Result 32408 states and 49217 transitions. [2021-11-25 20:31:46,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:31:46,757 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 6 states have internal predecessors, (121), 2 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 3 states have call predecessors, (38), 2 states have call successors, (38) Word has length 380 [2021-11-25 20:31:46,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:46,852 INFO L225 Difference]: With dead ends: 32408 [2021-11-25 20:31:46,852 INFO L226 Difference]: Without dead ends: 17556 [2021-11-25 20:31:46,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-11-25 20:31:46,913 INFO L933 BasicCegarLoop]: 610 mSDtfsCounter, 119 mSDsluCounter, 3125 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 3557 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:46,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 3557 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:31:46,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17556 states. [2021-11-25 20:31:48,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17556 to 16948. [2021-11-25 20:31:48,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16948 states, 12946 states have (on average 1.456975127452495) internal successors, (18862), 13516 states have internal predecessors, (18862), 2775 states have call successors, (2775), 1051 states have call predecessors, (2775), 1226 states have return successors, (3829), 2551 states have call predecessors, (3829), 2765 states have call successors, (3829) [2021-11-25 20:31:48,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16948 states to 16948 states and 25466 transitions. [2021-11-25 20:31:48,334 INFO L78 Accepts]: Start accepts. Automaton has 16948 states and 25466 transitions. Word has length 380 [2021-11-25 20:31:48,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:48,334 INFO L470 AbstractCegarLoop]: Abstraction has 16948 states and 25466 transitions. [2021-11-25 20:31:48,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 6 states have internal predecessors, (121), 2 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 3 states have call predecessors, (38), 2 states have call successors, (38) [2021-11-25 20:31:48,335 INFO L276 IsEmpty]: Start isEmpty. Operand 16948 states and 25466 transitions. [2021-11-25 20:31:48,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-11-25 20:31:48,376 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:48,377 INFO L514 BasicCegarLoop]: trace histogram [13, 11, 11, 11, 11, 8, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:31:48,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 20:31:48,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:31:48,605 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:48,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:48,606 INFO L85 PathProgramCache]: Analyzing trace with hash -812633662, now seen corresponding path program 1 times [2021-11-25 20:31:48,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:48,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20744261] [2021-11-25 20:31:48,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:48,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:48,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:48,850 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 31 proven. 78 refuted. 0 times theorem prover too weak. 626 trivial. 0 not checked. [2021-11-25 20:31:48,850 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:48,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20744261] [2021-11-25 20:31:48,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20744261] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:31:48,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157804522] [2021-11-25 20:31:48,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:48,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:31:48,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:31:48,852 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:31:48,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 20:31:49,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:49,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 3918 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 20:31:49,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:31:50,065 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 357 proven. 0 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-11-25 20:31:50,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:31:50,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157804522] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:50,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:31:50,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2021-11-25 20:31:50,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694573817] [2021-11-25 20:31:50,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:50,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:31:50,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:50,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:31:50,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-11-25 20:31:50,068 INFO L87 Difference]: Start difference. First operand 16948 states and 25466 transitions. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 6 states have internal predecessors, (140), 2 states have call successors, (45), 2 states have call predecessors, (45), 3 states have return successors, (44), 3 states have call predecessors, (44), 2 states have call successors, (44) [2021-11-25 20:31:51,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:51,211 INFO L93 Difference]: Finished difference Result 28147 states and 42563 transitions. [2021-11-25 20:31:51,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:31:51,213 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 6 states have internal predecessors, (140), 2 states have call successors, (45), 2 states have call predecessors, (45), 3 states have return successors, (44), 3 states have call predecessors, (44), 2 states have call successors, (44) Word has length 374 [2021-11-25 20:31:51,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:51,295 INFO L225 Difference]: With dead ends: 28147 [2021-11-25 20:31:51,295 INFO L226 Difference]: Without dead ends: 17148 [2021-11-25 20:31:51,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-11-25 20:31:51,336 INFO L933 BasicCegarLoop]: 699 mSDtfsCounter, 119 mSDsluCounter, 3467 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 3985 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:51,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 3985 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:31:51,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17148 states. [2021-11-25 20:31:52,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17148 to 16939. [2021-11-25 20:31:52,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16939 states, 12953 states have (on average 1.4571913842353124) internal successors, (18875), 13510 states have internal predecessors, (18875), 2766 states have call successors, (2766), 1045 states have call predecessors, (2766), 1219 states have return successors, (3806), 2554 states have call predecessors, (3806), 2756 states have call successors, (3806) [2021-11-25 20:31:52,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16939 states to 16939 states and 25447 transitions. [2021-11-25 20:31:52,828 INFO L78 Accepts]: Start accepts. Automaton has 16939 states and 25447 transitions. Word has length 374 [2021-11-25 20:31:52,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:52,829 INFO L470 AbstractCegarLoop]: Abstraction has 16939 states and 25447 transitions. [2021-11-25 20:31:52,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 6 states have internal predecessors, (140), 2 states have call successors, (45), 2 states have call predecessors, (45), 3 states have return successors, (44), 3 states have call predecessors, (44), 2 states have call successors, (44) [2021-11-25 20:31:52,829 INFO L276 IsEmpty]: Start isEmpty. Operand 16939 states and 25447 transitions. [2021-11-25 20:31:52,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-11-25 20:31:52,866 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:52,867 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:31:52,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 20:31:53,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-25 20:31:53,073 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:53,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:53,074 INFO L85 PathProgramCache]: Analyzing trace with hash 254785434, now seen corresponding path program 1 times [2021-11-25 20:31:53,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:53,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16341514] [2021-11-25 20:31:53,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:53,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:53,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:53,213 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-11-25 20:31:53,213 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:53,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16341514] [2021-11-25 20:31:53,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16341514] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:31:53,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18243365] [2021-11-25 20:31:53,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:53,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:31:53,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:31:53,215 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:31:53,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 20:31:53,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:53,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 2171 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 20:31:53,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:31:54,117 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-25 20:31:54,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:31:54,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18243365] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:54,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:31:54,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 17 [2021-11-25 20:31:54,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294222540] [2021-11-25 20:31:54,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:54,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 20:31:54,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:54,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 20:31:54,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-11-25 20:31:54,119 INFO L87 Difference]: Start difference. First operand 16939 states and 25447 transitions. Second operand has 10 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 4 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2021-11-25 20:31:57,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:57,325 INFO L93 Difference]: Finished difference Result 28013 states and 42085 transitions. [2021-11-25 20:31:57,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 20:31:57,330 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 4 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 220 [2021-11-25 20:31:57,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:57,419 INFO L225 Difference]: With dead ends: 28013 [2021-11-25 20:31:57,419 INFO L226 Difference]: Without dead ends: 17119 [2021-11-25 20:31:57,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-11-25 20:31:57,458 INFO L933 BasicCegarLoop]: 843 mSDtfsCounter, 1338 mSDsluCounter, 3378 mSDsCounter, 0 mSdLazyCounter, 3927 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1360 SdHoareTripleChecker+Valid, 3851 SdHoareTripleChecker+Invalid, 4237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 3927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:57,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1360 Valid, 3851 Invalid, 4237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 3927 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-25 20:31:57,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17119 states. [2021-11-25 20:31:58,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17119 to 16635. [2021-11-25 20:31:58,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16635 states, 12649 states have (on average 1.4473080875958573) internal successors, (18307), 13206 states have internal predecessors, (18307), 2766 states have call successors, (2766), 1045 states have call predecessors, (2766), 1219 states have return successors, (3806), 2554 states have call predecessors, (3806), 2756 states have call successors, (3806) [2021-11-25 20:31:58,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16635 states to 16635 states and 24879 transitions. [2021-11-25 20:31:58,952 INFO L78 Accepts]: Start accepts. Automaton has 16635 states and 24879 transitions. Word has length 220 [2021-11-25 20:31:58,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:58,952 INFO L470 AbstractCegarLoop]: Abstraction has 16635 states and 24879 transitions. [2021-11-25 20:31:58,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 4 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2021-11-25 20:31:58,953 INFO L276 IsEmpty]: Start isEmpty. Operand 16635 states and 24879 transitions. [2021-11-25 20:31:58,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-11-25 20:31:58,996 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:58,997 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:31:59,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 20:31:59,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-25 20:31:59,201 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:59,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:59,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1643496363, now seen corresponding path program 1 times [2021-11-25 20:31:59,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:59,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683915764] [2021-11-25 20:31:59,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:59,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:59,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:59,339 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-11-25 20:31:59,339 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:59,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683915764] [2021-11-25 20:31:59,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683915764] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:31:59,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747385259] [2021-11-25 20:31:59,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:59,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:31:59,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:31:59,341 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:31:59,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 20:31:59,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:59,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 2892 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:31:59,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:32:00,116 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-11-25 20:32:00,116 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:32:00,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747385259] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:32:00,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:32:00,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-11-25 20:32:00,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174342111] [2021-11-25 20:32:00,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:32:00,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:32:00,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:32:00,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:32:00,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:32:00,118 INFO L87 Difference]: Start difference. First operand 16635 states and 24879 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-25 20:32:01,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:32:01,464 INFO L93 Difference]: Finished difference Result 33254 states and 50233 transitions. [2021-11-25 20:32:01,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:32:01,465 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 231 [2021-11-25 20:32:01,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:32:01,528 INFO L225 Difference]: With dead ends: 33254 [2021-11-25 20:32:01,529 INFO L226 Difference]: Without dead ends: 16595 [2021-11-25 20:32:01,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:32:01,584 INFO L933 BasicCegarLoop]: 490 mSDtfsCounter, 192 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:32:01,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 1446 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:32:01,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16595 states. [2021-11-25 20:32:02,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16595 to 16595. [2021-11-25 20:32:02,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16595 states, 12613 states have (on average 1.401490525648141) internal successors, (17677), 13166 states have internal predecessors, (17677), 2766 states have call successors, (2766), 1045 states have call predecessors, (2766), 1215 states have return successors, (3799), 2554 states have call predecessors, (3799), 2756 states have call successors, (3799) [2021-11-25 20:32:02,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16595 states to 16595 states and 24242 transitions. [2021-11-25 20:32:02,728 INFO L78 Accepts]: Start accepts. Automaton has 16595 states and 24242 transitions. Word has length 231 [2021-11-25 20:32:02,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:32:02,729 INFO L470 AbstractCegarLoop]: Abstraction has 16595 states and 24242 transitions. [2021-11-25 20:32:02,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-25 20:32:02,729 INFO L276 IsEmpty]: Start isEmpty. Operand 16595 states and 24242 transitions. [2021-11-25 20:32:02,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-11-25 20:32:02,754 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:32:02,755 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:32:02,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-25 20:32:02,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:32:02,956 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:32:02,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:32:02,956 INFO L85 PathProgramCache]: Analyzing trace with hash 359417694, now seen corresponding path program 1 times [2021-11-25 20:32:02,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:32:02,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249471083] [2021-11-25 20:32:02,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:02,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:32:02,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:03,066 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2021-11-25 20:32:03,066 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:32:03,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249471083] [2021-11-25 20:32:03,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249471083] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:32:03,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080887633] [2021-11-25 20:32:03,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:03,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:32:03,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:32:03,069 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:32:03,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 20:32:03,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:03,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 2894 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:32:03,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:32:03,890 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-25 20:32:03,890 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:32:03,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080887633] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:32:03,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:32:03,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-11-25 20:32:03,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431789277] [2021-11-25 20:32:03,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:32:03,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:32:03,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:32:03,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:32:03,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:32:03,892 INFO L87 Difference]: Start difference. First operand 16595 states and 24242 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-25 20:32:05,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:32:05,218 INFO L93 Difference]: Finished difference Result 33274 states and 48761 transitions. [2021-11-25 20:32:05,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:32:05,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 231 [2021-11-25 20:32:05,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:32:05,291 INFO L225 Difference]: With dead ends: 33274 [2021-11-25 20:32:05,291 INFO L226 Difference]: Without dead ends: 16595 [2021-11-25 20:32:05,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:32:05,355 INFO L933 BasicCegarLoop]: 503 mSDtfsCounter, 135 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 1459 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:32:05,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 1459 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:32:05,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16595 states. [2021-11-25 20:32:06,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16595 to 15882. [2021-11-25 20:32:06,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15882 states, 11978 states have (on average 1.3408749373852062) internal successors, (16061), 12525 states have internal predecessors, (16061), 2721 states have call successors, (2721), 1018 states have call predecessors, (2721), 1182 states have return successors, (3739), 2509 states have call predecessors, (3739), 2711 states have call successors, (3739) [2021-11-25 20:32:06,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15882 states to 15882 states and 22521 transitions. [2021-11-25 20:32:06,628 INFO L78 Accepts]: Start accepts. Automaton has 15882 states and 22521 transitions. Word has length 231 [2021-11-25 20:32:06,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:32:06,629 INFO L470 AbstractCegarLoop]: Abstraction has 15882 states and 22521 transitions. [2021-11-25 20:32:06,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-25 20:32:06,629 INFO L276 IsEmpty]: Start isEmpty. Operand 15882 states and 22521 transitions. [2021-11-25 20:32:06,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-11-25 20:32:06,651 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:32:06,651 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:32:06,674 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-25 20:32:06,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:32:06,852 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:32:06,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:32:06,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1170767706, now seen corresponding path program 1 times [2021-11-25 20:32:06,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:32:06,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34713221] [2021-11-25 20:32:06,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:06,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:32:06,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:06,965 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-11-25 20:32:06,965 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:32:06,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34713221] [2021-11-25 20:32:06,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34713221] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:32:06,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037544388] [2021-11-25 20:32:06,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:06,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:32:06,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:32:06,967 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:32:06,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-25 20:32:07,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:07,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 2899 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 20:32:07,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:32:08,127 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-11-25 20:32:08,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:32:08,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037544388] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:32:08,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:32:08,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2021-11-25 20:32:08,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629468016] [2021-11-25 20:32:08,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:32:08,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:32:08,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:32:08,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:32:08,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-25 20:32:08,129 INFO L87 Difference]: Start difference. First operand 15882 states and 22521 transitions. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 7 states have internal predecessors, (101), 6 states have call successors, (34), 5 states have call predecessors, (34), 5 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) [2021-11-25 20:32:13,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:32:13,715 INFO L93 Difference]: Finished difference Result 42717 states and 61952 transitions. [2021-11-25 20:32:13,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 20:32:13,715 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 7 states have internal predecessors, (101), 6 states have call successors, (34), 5 states have call predecessors, (34), 5 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) Word has length 232 [2021-11-25 20:32:13,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:32:13,812 INFO L225 Difference]: With dead ends: 42717 [2021-11-25 20:32:13,813 INFO L226 Difference]: Without dead ends: 26690 [2021-11-25 20:32:13,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-11-25 20:32:13,861 INFO L933 BasicCegarLoop]: 947 mSDtfsCounter, 2353 mSDsluCounter, 1027 mSDsCounter, 0 mSdLazyCounter, 4115 mSolverCounterSat, 1038 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2524 SdHoareTripleChecker+Valid, 1891 SdHoareTripleChecker+Invalid, 5153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1038 IncrementalHoareTripleChecker+Valid, 4115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:32:13,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2524 Valid, 1891 Invalid, 5153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1038 Valid, 4115 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-25 20:32:13,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26690 states. [2021-11-25 20:32:15,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26690 to 25278. [2021-11-25 20:32:15,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25278 states, 18602 states have (on average 1.3459843027631437) internal successors, (25038), 19612 states have internal predecessors, (25038), 4920 states have call successors, (4920), 1488 states have call predecessors, (4920), 1755 states have return successors, (6564), 4481 states have call predecessors, (6564), 4905 states have call successors, (6564) [2021-11-25 20:32:15,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25278 states to 25278 states and 36522 transitions. [2021-11-25 20:32:15,808 INFO L78 Accepts]: Start accepts. Automaton has 25278 states and 36522 transitions. Word has length 232 [2021-11-25 20:32:15,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:32:15,809 INFO L470 AbstractCegarLoop]: Abstraction has 25278 states and 36522 transitions. [2021-11-25 20:32:15,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 7 states have internal predecessors, (101), 6 states have call successors, (34), 5 states have call predecessors, (34), 5 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) [2021-11-25 20:32:15,809 INFO L276 IsEmpty]: Start isEmpty. Operand 25278 states and 36522 transitions. [2021-11-25 20:32:15,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-11-25 20:32:15,832 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:32:15,832 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:32:15,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-25 20:32:16,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:32:16,037 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:32:16,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:32:16,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1534668119, now seen corresponding path program 1 times [2021-11-25 20:32:16,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:32:16,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85665] [2021-11-25 20:32:16,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:16,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:32:16,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:16,174 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-25 20:32:16,175 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:32:16,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85665] [2021-11-25 20:32:16,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85665] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:32:16,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003737624] [2021-11-25 20:32:16,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:16,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:32:16,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:32:16,189 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:32:16,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-25 20:32:16,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:16,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 2168 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 20:32:16,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:32:17,044 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-11-25 20:32:17,045 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:32:17,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003737624] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:32:17,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:32:17,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 17 [2021-11-25 20:32:17,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349655812] [2021-11-25 20:32:17,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:32:17,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 20:32:17,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:32:17,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 20:32:17,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-11-25 20:32:17,047 INFO L87 Difference]: Start difference. First operand 25278 states and 36522 transitions. Second operand has 10 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 4 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2021-11-25 20:32:21,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:32:21,213 INFO L93 Difference]: Finished difference Result 41671 states and 60227 transitions. [2021-11-25 20:32:21,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 20:32:21,214 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 4 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 223 [2021-11-25 20:32:21,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:32:21,492 INFO L225 Difference]: With dead ends: 41671 [2021-11-25 20:32:21,492 INFO L226 Difference]: Without dead ends: 25504 [2021-11-25 20:32:21,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-11-25 20:32:21,538 INFO L933 BasicCegarLoop]: 807 mSDtfsCounter, 1441 mSDsluCounter, 3178 mSDsCounter, 0 mSdLazyCounter, 3896 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1463 SdHoareTripleChecker+Valid, 3615 SdHoareTripleChecker+Invalid, 4188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 3896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:32:21,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1463 Valid, 3615 Invalid, 4188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 3896 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-25 20:32:21,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25504 states. [2021-11-25 20:32:23,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25504 to 24863. [2021-11-25 20:32:23,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24863 states, 18187 states have (on average 1.3425523725738164) internal successors, (24417), 19197 states have internal predecessors, (24417), 4920 states have call successors, (4920), 1488 states have call predecessors, (4920), 1755 states have return successors, (6564), 4481 states have call predecessors, (6564), 4905 states have call successors, (6564) [2021-11-25 20:32:23,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24863 states to 24863 states and 35901 transitions. [2021-11-25 20:32:23,311 INFO L78 Accepts]: Start accepts. Automaton has 24863 states and 35901 transitions. Word has length 223 [2021-11-25 20:32:23,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:32:23,312 INFO L470 AbstractCegarLoop]: Abstraction has 24863 states and 35901 transitions. [2021-11-25 20:32:23,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 4 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2021-11-25 20:32:23,312 INFO L276 IsEmpty]: Start isEmpty. Operand 24863 states and 35901 transitions. [2021-11-25 20:32:23,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-11-25 20:32:23,338 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:32:23,338 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:32:23,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-25 20:32:23,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-25 20:32:23,539 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:32:23,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:32:23,540 INFO L85 PathProgramCache]: Analyzing trace with hash 359549242, now seen corresponding path program 1 times [2021-11-25 20:32:23,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:32:23,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250324971] [2021-11-25 20:32:23,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:23,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:32:23,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:23,662 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2021-11-25 20:32:23,663 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:32:23,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250324971] [2021-11-25 20:32:23,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250324971] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:32:23,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646837579] [2021-11-25 20:32:23,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:23,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:32:23,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:32:23,665 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:32:23,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-25 20:32:24,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:24,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 2894 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:32:24,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:32:24,538 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-25 20:32:24,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:32:24,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646837579] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:32:24,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:32:24,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-11-25 20:32:24,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60574440] [2021-11-25 20:32:24,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:32:24,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:32:24,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:32:24,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:32:24,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:32:24,540 INFO L87 Difference]: Start difference. First operand 24863 states and 35901 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-25 20:32:26,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:32:26,725 INFO L93 Difference]: Finished difference Result 49792 states and 72308 transitions. [2021-11-25 20:32:26,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:32:26,728 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 231 [2021-11-25 20:32:26,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:32:26,837 INFO L225 Difference]: With dead ends: 49792 [2021-11-25 20:32:26,837 INFO L226 Difference]: Without dead ends: 24863 [2021-11-25 20:32:26,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:32:26,926 INFO L933 BasicCegarLoop]: 503 mSDtfsCounter, 136 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 1459 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:32:26,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 1459 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:32:26,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24863 states. [2021-11-25 20:32:28,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24863 to 24815. [2021-11-25 20:32:28,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24815 states, 18147 states have (on average 1.3198324791976634) internal successors, (23951), 19157 states have internal predecessors, (23951), 4915 states have call successors, (4915), 1485 states have call predecessors, (4915), 1752 states have return successors, (6559), 4476 states have call predecessors, (6559), 4900 states have call successors, (6559) [2021-11-25 20:32:28,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24815 states to 24815 states and 35425 transitions. [2021-11-25 20:32:28,918 INFO L78 Accepts]: Start accepts. Automaton has 24815 states and 35425 transitions. Word has length 231 [2021-11-25 20:32:28,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:32:28,918 INFO L470 AbstractCegarLoop]: Abstraction has 24815 states and 35425 transitions. [2021-11-25 20:32:28,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-25 20:32:28,919 INFO L276 IsEmpty]: Start isEmpty. Operand 24815 states and 35425 transitions. [2021-11-25 20:32:28,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-11-25 20:32:28,943 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:32:28,943 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:32:28,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-25 20:32:29,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-25 20:32:29,144 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:32:29,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:32:29,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1013910498, now seen corresponding path program 1 times [2021-11-25 20:32:29,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:32:29,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623936771] [2021-11-25 20:32:29,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:29,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:32:29,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:29,266 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2021-11-25 20:32:29,266 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:32:29,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623936771] [2021-11-25 20:32:29,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623936771] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:32:29,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10566351] [2021-11-25 20:32:29,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:29,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:32:29,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:32:29,268 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa50b09-f961-4115-a9d3-5f5b7213bd50/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)