./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.12.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.12.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bc6dc2c99e05b6915f0a2e5b5d96221c996d96767aaa6be997dea59c4d6f5f0a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:27:55,420 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:27:55,422 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:27:55,457 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:27:55,458 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:27:55,459 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:27:55,461 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:27:55,464 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:27:55,467 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:27:55,468 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:27:55,470 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:27:55,472 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:27:55,472 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:27:55,474 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:27:55,476 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:27:55,477 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:27:55,479 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:27:55,480 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:27:55,482 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:27:55,485 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:27:55,487 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:27:55,488 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:27:55,490 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:27:55,491 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:27:55,495 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:27:55,496 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:27:55,496 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:27:55,498 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:27:55,498 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:27:55,499 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:27:55,500 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:27:55,500 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:27:55,501 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:27:55,502 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:27:55,503 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:27:55,504 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:27:55,504 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:27:55,504 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:27:55,504 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:27:55,505 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:27:55,506 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:27:55,507 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:27:55,531 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:27:55,531 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:27:55,532 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:27:55,532 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:27:55,533 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:27:55,533 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:27:55,533 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:27:55,534 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:27:55,534 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:27:55,534 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:27:55,534 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:27:55,534 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:27:55,535 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:27:55,535 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:27:55,535 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:27:55,535 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:27:55,536 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:27:55,536 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:27:55,537 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:27:55,537 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:27:55,537 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:27:55,537 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:27:55,538 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:27:55,538 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:27:55,538 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:27:55,538 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:27:55,538 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:27:55,539 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:27:55,539 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:27:55,539 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:27:55,539 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:27:55,540 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:27:55,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:27:55,540 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:27:55,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:27:55,541 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:27:55,541 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:27:55,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:27:55,541 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:27:55,541 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:27:55,542 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:27:55,542 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_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bc6dc2c99e05b6915f0a2e5b5d96221c996d96767aaa6be997dea59c4d6f5f0a [2021-11-23 03:27:55,830 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:27:55,870 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:27:55,873 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:27:55,875 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:27:55,876 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:27:55,877 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/systemc/token_ring.12.cil-2.c [2021-11-23 03:27:55,984 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/data/df420b2ef/2db853deb1e54dc898a84b5f62d79a4b/FLAG11fd2d3e0 [2021-11-23 03:27:56,677 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:27:56,678 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/sv-benchmarks/c/systemc/token_ring.12.cil-2.c [2021-11-23 03:27:56,717 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/data/df420b2ef/2db853deb1e54dc898a84b5f62d79a4b/FLAG11fd2d3e0 [2021-11-23 03:27:56,924 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/data/df420b2ef/2db853deb1e54dc898a84b5f62d79a4b [2021-11-23 03:27:56,927 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:27:56,929 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:27:56,936 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:27:56,937 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:27:56,942 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:27:56,944 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:27:56" (1/1) ... [2021-11-23 03:27:56,948 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a0870e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:56, skipping insertion in model container [2021-11-23 03:27:56,949 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:27:56" (1/1) ... [2021-11-23 03:27:56,960 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:27:57,028 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:27:57,230 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_cf6974ec-a188-45c5-b059-1ca12427355c/sv-benchmarks/c/systemc/token_ring.12.cil-2.c[671,684] [2021-11-23 03:27:57,415 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:27:57,429 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:27:57,446 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_cf6974ec-a188-45c5-b059-1ca12427355c/sv-benchmarks/c/systemc/token_ring.12.cil-2.c[671,684] [2021-11-23 03:27:57,604 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:27:57,632 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:27:57,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:57 WrapperNode [2021-11-23 03:27:57,633 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:27:57,634 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:27:57,634 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:27:57,634 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:27:57,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:57" (1/1) ... [2021-11-23 03:27:57,661 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:57" (1/1) ... [2021-11-23 03:27:57,738 INFO L137 Inliner]: procedures = 52, calls = 67, calls flagged for inlining = 36, calls inlined = 36, statements flattened = 853 [2021-11-23 03:27:57,738 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:27:57,739 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:27:57,739 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:27:57,740 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:27:57,750 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:57" (1/1) ... [2021-11-23 03:27:57,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:57" (1/1) ... [2021-11-23 03:27:57,756 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:57" (1/1) ... [2021-11-23 03:27:57,757 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:57" (1/1) ... [2021-11-23 03:27:57,776 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:57" (1/1) ... [2021-11-23 03:27:57,795 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:57" (1/1) ... [2021-11-23 03:27:57,799 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:57" (1/1) ... [2021-11-23 03:27:57,806 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:27:57,807 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:27:57,807 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:27:57,807 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:27:57,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:57" (1/1) ... [2021-11-23 03:27:57,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:27:57,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:27:57,857 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:27:57,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:27:57,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:27:57,904 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-23 03:27:57,904 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-23 03:27:57,904 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-23 03:27:57,904 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-23 03:27:57,904 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-23 03:27:57,905 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-23 03:27:57,905 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-23 03:27:57,905 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-23 03:27:57,905 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-23 03:27:57,905 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-23 03:27:57,906 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-23 03:27:57,906 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-23 03:27:57,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:27:57,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:27:57,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:27:58,025 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:27:58,027 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:27:59,121 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:27:59,659 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:27:59,660 INFO L301 CfgBuilder]: Removed 15 assume(true) statements. [2021-11-23 03:27:59,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:27:59 BoogieIcfgContainer [2021-11-23 03:27:59,664 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:27:59,665 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:27:59,666 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:27:59,669 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:27:59,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:27:56" (1/3) ... [2021-11-23 03:27:59,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17c5ef61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:27:59, skipping insertion in model container [2021-11-23 03:27:59,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:57" (2/3) ... [2021-11-23 03:27:59,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17c5ef61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:27:59, skipping insertion in model container [2021-11-23 03:27:59,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:27:59" (3/3) ... [2021-11-23 03:27:59,673 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.12.cil-2.c [2021-11-23 03:27:59,678 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:27:59,678 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:27:59,747 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:27:59,759 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:27:59,759 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:27:59,801 INFO L276 IsEmpty]: Start isEmpty. Operand has 188 states, 154 states have (on average 1.5584415584415585) internal successors, (240), 156 states have internal predecessors, (240), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-23 03:27:59,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-23 03:27:59,810 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:27:59,811 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:27:59,811 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:27:59,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:27:59,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1262094952, now seen corresponding path program 1 times [2021-11-23 03:27:59,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:27:59,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961695911] [2021-11-23 03:27:59,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:27:59,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:28:00,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:28:00,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:28:00,309 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:28:00,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961695911] [2021-11-23 03:28:00,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961695911] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:28:00,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:28:00,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:28:00,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326036233] [2021-11-23 03:28:00,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:28:00,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:28:00,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:28:00,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:28:00,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:28:00,366 INFO L87 Difference]: Start difference. First operand has 188 states, 154 states have (on average 1.5584415584415585) internal successors, (240), 156 states have internal predecessors, (240), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 03:28:01,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:28:01,040 INFO L93 Difference]: Finished difference Result 548 states and 868 transitions. [2021-11-23 03:28:01,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:28:01,044 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 66 [2021-11-23 03:28:01,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:28:01,075 INFO L225 Difference]: With dead ends: 548 [2021-11-23 03:28:01,075 INFO L226 Difference]: Without dead ends: 361 [2021-11-23 03:28:01,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:28:01,093 INFO L933 BasicCegarLoop]: 454 mSDtfsCounter, 512 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:28:01,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 810 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 03:28:01,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-11-23 03:28:01,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 360. [2021-11-23 03:28:01,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 299 states have (on average 1.5250836120401339) internal successors, (456), 301 states have internal predecessors, (456), 48 states have call successors, (48), 12 states have call predecessors, (48), 12 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2021-11-23 03:28:01,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 552 transitions. [2021-11-23 03:28:01,237 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 552 transitions. Word has length 66 [2021-11-23 03:28:01,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:28:01,238 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 552 transitions. [2021-11-23 03:28:01,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 03:28:01,239 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 552 transitions. [2021-11-23 03:28:01,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-23 03:28:01,267 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:28:01,267 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:28:01,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:28:01,268 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:28:01,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:28:01,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1731208306, now seen corresponding path program 1 times [2021-11-23 03:28:01,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:28:01,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68742835] [2021-11-23 03:28:01,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:28:01,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:28:01,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:28:01,554 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 03:28:01,554 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:28:01,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68742835] [2021-11-23 03:28:01,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68742835] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:28:01,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419208448] [2021-11-23 03:28:01,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:28:01,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:28:01,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:28:01,558 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:28:01,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:28:01,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:28:01,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 992 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 03:28:01,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:28:02,177 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 03:28:02,178 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:28:02,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419208448] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:28:02,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:28:02,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-23 03:28:02,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171538794] [2021-11-23 03:28:02,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:28:02,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:28:02,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:28:02,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:28:02,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:28:02,182 INFO L87 Difference]: Start difference. First operand 360 states and 552 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 03:28:02,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:28:02,373 INFO L93 Difference]: Finished difference Result 1063 states and 1659 transitions. [2021-11-23 03:28:02,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:28:02,374 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 135 [2021-11-23 03:28:02,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:28:02,382 INFO L225 Difference]: With dead ends: 1063 [2021-11-23 03:28:02,382 INFO L226 Difference]: Without dead ends: 708 [2021-11-23 03:28:02,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:28:02,386 INFO L933 BasicCegarLoop]: 288 mSDtfsCounter, 232 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:28:02,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 514 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:28:02,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-11-23 03:28:02,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 704. [2021-11-23 03:28:02,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 589 states have (on average 1.5229202037351444) internal successors, (897), 592 states have internal predecessors, (897), 90 states have call successors, (90), 24 states have call predecessors, (90), 24 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2021-11-23 03:28:02,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 1077 transitions. [2021-11-23 03:28:02,447 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 1077 transitions. Word has length 135 [2021-11-23 03:28:02,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:28:02,448 INFO L470 AbstractCegarLoop]: Abstraction has 704 states and 1077 transitions. [2021-11-23 03:28:02,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 03:28:02,448 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 1077 transitions. [2021-11-23 03:28:02,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-23 03:28:02,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:28:02,453 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:28:02,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:28:02,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:28:02,676 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:28:02,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:28:02,677 INFO L85 PathProgramCache]: Analyzing trace with hash 2096052334, now seen corresponding path program 1 times [2021-11-23 03:28:02,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:28:02,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329739685] [2021-11-23 03:28:02,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:28:02,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:28:02,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:28:02,844 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 03:28:02,845 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:28:02,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329739685] [2021-11-23 03:28:02,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329739685] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:28:02,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788952219] [2021-11-23 03:28:02,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:28:02,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:28:02,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:28:02,851 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:28:02,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:28:03,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:28:03,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 986 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 03:28:03,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:28:03,403 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 03:28:03,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:28:03,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788952219] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:28:03,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:28:03,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-23 03:28:03,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856303088] [2021-11-23 03:28:03,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:28:03,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:28:03,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:28:03,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:28:03,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:28:03,409 INFO L87 Difference]: Start difference. First operand 704 states and 1077 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 03:28:03,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:28:03,621 INFO L93 Difference]: Finished difference Result 2089 states and 3252 transitions. [2021-11-23 03:28:03,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:28:03,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 135 [2021-11-23 03:28:03,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:28:03,638 INFO L225 Difference]: With dead ends: 2089 [2021-11-23 03:28:03,639 INFO L226 Difference]: Without dead ends: 1390 [2021-11-23 03:28:03,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:28:03,643 INFO L933 BasicCegarLoop]: 276 mSDtfsCounter, 241 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:28:03,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 502 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:28:03,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2021-11-23 03:28:03,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1384. [2021-11-23 03:28:03,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1163 states have (on average 1.5193465176268273) internal successors, (1767), 1168 states have internal predecessors, (1767), 172 states have call successors, (172), 48 states have call predecessors, (172), 48 states have return successors, (172), 168 states have call predecessors, (172), 172 states have call successors, (172) [2021-11-23 03:28:03,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 2111 transitions. [2021-11-23 03:28:03,756 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 2111 transitions. Word has length 135 [2021-11-23 03:28:03,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:28:03,756 INFO L470 AbstractCegarLoop]: Abstraction has 1384 states and 2111 transitions. [2021-11-23 03:28:03,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 03:28:03,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 2111 transitions. [2021-11-23 03:28:03,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-23 03:28:03,763 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:28:03,764 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:28:03,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:28:03,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:28:03,972 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:28:03,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:28:03,973 INFO L85 PathProgramCache]: Analyzing trace with hash -258320498, now seen corresponding path program 1 times [2021-11-23 03:28:03,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:28:03,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462201023] [2021-11-23 03:28:03,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:28:03,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:28:04,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:28:04,068 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 03:28:04,068 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:28:04,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462201023] [2021-11-23 03:28:04,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462201023] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:28:04,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53490176] [2021-11-23 03:28:04,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:28:04,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:28:04,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:28:04,075 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:28:04,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:28:04,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:28:04,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 03:28:04,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:28:04,562 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-23 03:28:04,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:28:04,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53490176] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:28:04,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:28:04,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-23 03:28:04,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486986341] [2021-11-23 03:28:04,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:28:04,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:28:04,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:28:04,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:28:04,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:28:04,566 INFO L87 Difference]: Start difference. First operand 1384 states and 2111 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 03:28:04,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:28:04,833 INFO L93 Difference]: Finished difference Result 4117 states and 6388 transitions. [2021-11-23 03:28:04,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:28:04,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 135 [2021-11-23 03:28:04,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:28:04,862 INFO L225 Difference]: With dead ends: 4117 [2021-11-23 03:28:04,863 INFO L226 Difference]: Without dead ends: 2738 [2021-11-23 03:28:04,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:28:04,876 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 259 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:28:04,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 501 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:28:04,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2738 states. [2021-11-23 03:28:05,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2738 to 2728. [2021-11-23 03:28:05,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2728 states, 2299 states have (on average 1.5150065245759026) internal successors, (3483), 2308 states have internal predecessors, (3483), 332 states have call successors, (332), 96 states have call predecessors, (332), 96 states have return successors, (332), 324 states have call predecessors, (332), 332 states have call successors, (332) [2021-11-23 03:28:05,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2728 states to 2728 states and 4147 transitions. [2021-11-23 03:28:05,090 INFO L78 Accepts]: Start accepts. Automaton has 2728 states and 4147 transitions. Word has length 135 [2021-11-23 03:28:05,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:28:05,091 INFO L470 AbstractCegarLoop]: Abstraction has 2728 states and 4147 transitions. [2021-11-23 03:28:05,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 03:28:05,092 INFO L276 IsEmpty]: Start isEmpty. Operand 2728 states and 4147 transitions. [2021-11-23 03:28:05,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-23 03:28:05,102 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:28:05,102 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:28:05,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:28:05,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:28:05,320 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:28:05,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:28:05,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1185410734, now seen corresponding path program 1 times [2021-11-23 03:28:05,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:28:05,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895149209] [2021-11-23 03:28:05,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:28:05,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:28:05,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:28:05,421 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 03:28:05,421 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:28:05,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895149209] [2021-11-23 03:28:05,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895149209] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:28:05,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282724220] [2021-11-23 03:28:05,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:28:05,423 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:28:05,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:28:05,428 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:28:05,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:28:05,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:28:05,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 974 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 03:28:05,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:28:05,964 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-23 03:28:05,965 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:28:05,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282724220] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:28:05,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:28:05,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-23 03:28:05,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381257299] [2021-11-23 03:28:05,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:28:05,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:28:05,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:28:05,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:28:05,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:28:05,968 INFO L87 Difference]: Start difference. First operand 2728 states and 4147 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 03:28:06,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:28:06,319 INFO L93 Difference]: Finished difference Result 8125 states and 12560 transitions. [2021-11-23 03:28:06,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:28:06,320 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 135 [2021-11-23 03:28:06,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:28:06,373 INFO L225 Difference]: With dead ends: 8125 [2021-11-23 03:28:06,374 INFO L226 Difference]: Without dead ends: 5402 [2021-11-23 03:28:06,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:28:06,394 INFO L933 BasicCegarLoop]: 285 mSDtfsCounter, 262 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:28:06,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 511 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:28:06,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5402 states. [2021-11-23 03:28:06,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5402 to 5384. [2021-11-23 03:28:06,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5384 states, 4547 states have (on average 1.510226522982186) internal successors, (6867), 4564 states have internal predecessors, (6867), 644 states have call successors, (644), 192 states have call predecessors, (644), 192 states have return successors, (644), 628 states have call predecessors, (644), 644 states have call successors, (644) [2021-11-23 03:28:06,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5384 states to 5384 states and 8155 transitions. [2021-11-23 03:28:06,780 INFO L78 Accepts]: Start accepts. Automaton has 5384 states and 8155 transitions. Word has length 135 [2021-11-23 03:28:06,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:28:06,781 INFO L470 AbstractCegarLoop]: Abstraction has 5384 states and 8155 transitions. [2021-11-23 03:28:06,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 03:28:06,781 INFO L276 IsEmpty]: Start isEmpty. Operand 5384 states and 8155 transitions. [2021-11-23 03:28:06,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-23 03:28:06,796 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:28:06,797 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:28:06,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:28:07,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:28:07,018 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:28:07,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:28:07,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1580041102, now seen corresponding path program 1 times [2021-11-23 03:28:07,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:28:07,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214256091] [2021-11-23 03:28:07,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:28:07,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:28:07,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:28:07,135 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 03:28:07,136 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:28:07,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214256091] [2021-11-23 03:28:07,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214256091] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:28:07,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338298685] [2021-11-23 03:28:07,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:28:07,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:28:07,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:28:07,138 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:28:07,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 03:28:07,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:28:07,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 03:28:07,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:28:07,592 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-23 03:28:07,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:28:07,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338298685] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:28:07,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:28:07,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-11-23 03:28:07,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271173430] [2021-11-23 03:28:07,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:28:07,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:28:07,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:28:07,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:28:07,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:28:07,595 INFO L87 Difference]: Start difference. First operand 5384 states and 8155 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 03:28:08,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:28:08,216 INFO L93 Difference]: Finished difference Result 16045 states and 24704 transitions. [2021-11-23 03:28:08,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:28:08,217 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 135 [2021-11-23 03:28:08,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:28:08,313 INFO L225 Difference]: With dead ends: 16045 [2021-11-23 03:28:08,314 INFO L226 Difference]: Without dead ends: 10666 [2021-11-23 03:28:08,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:28:08,345 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 247 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:28:08,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 482 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:28:08,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10666 states. [2021-11-23 03:28:08,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10666 to 10632. [2021-11-23 03:28:08,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10632 states, 8995 states have (on average 1.5051695386325736) internal successors, (13539), 9028 states have internal predecessors, (13539), 1252 states have call successors, (1252), 384 states have call predecessors, (1252), 384 states have return successors, (1252), 1220 states have call predecessors, (1252), 1252 states have call successors, (1252) [2021-11-23 03:28:09,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10632 states to 10632 states and 16043 transitions. [2021-11-23 03:28:09,063 INFO L78 Accepts]: Start accepts. Automaton has 10632 states and 16043 transitions. Word has length 135 [2021-11-23 03:28:09,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:28:09,064 INFO L470 AbstractCegarLoop]: Abstraction has 10632 states and 16043 transitions. [2021-11-23 03:28:09,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 03:28:09,064 INFO L276 IsEmpty]: Start isEmpty. Operand 10632 states and 16043 transitions. [2021-11-23 03:28:09,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-23 03:28:09,092 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:28:09,092 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:28:09,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 03:28:09,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:28:09,308 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:28:09,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:28:09,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1551054162, now seen corresponding path program 1 times [2021-11-23 03:28:09,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:28:09,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714565081] [2021-11-23 03:28:09,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:28:09,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:28:09,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:28:09,397 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 03:28:09,397 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:28:09,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714565081] [2021-11-23 03:28:09,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714565081] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:28:09,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745373679] [2021-11-23 03:28:09,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:28:09,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:28:09,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:28:09,399 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:28:09,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 03:28:09,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:28:09,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 962 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 03:28:09,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:28:09,915 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-23 03:28:09,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:28:09,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745373679] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:28:09,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:28:09,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2021-11-23 03:28:09,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082557202] [2021-11-23 03:28:09,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:28:09,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:28:09,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:28:09,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:28:09,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:28:09,919 INFO L87 Difference]: Start difference. First operand 10632 states and 16043 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 03:28:10,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:28:10,912 INFO L93 Difference]: Finished difference Result 31693 states and 48592 transitions. [2021-11-23 03:28:10,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:28:10,912 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 135 [2021-11-23 03:28:10,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:28:11,095 INFO L225 Difference]: With dead ends: 31693 [2021-11-23 03:28:11,095 INFO L226 Difference]: Without dead ends: 21066 [2021-11-23 03:28:11,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:28:11,164 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 253 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:28:11,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 482 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:28:11,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21066 states. [2021-11-23 03:28:12,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21066 to 21000. [2021-11-23 03:28:12,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21000 states, 17795 states have (on average 1.499915706659174) internal successors, (26691), 17860 states have internal predecessors, (26691), 2436 states have call successors, (2436), 768 states have call predecessors, (2436), 768 states have return successors, (2436), 2372 states have call predecessors, (2436), 2436 states have call successors, (2436) [2021-11-23 03:28:12,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21000 states to 21000 states and 31563 transitions. [2021-11-23 03:28:12,420 INFO L78 Accepts]: Start accepts. Automaton has 21000 states and 31563 transitions. Word has length 135 [2021-11-23 03:28:12,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:28:12,420 INFO L470 AbstractCegarLoop]: Abstraction has 21000 states and 31563 transitions. [2021-11-23 03:28:12,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 03:28:12,422 INFO L276 IsEmpty]: Start isEmpty. Operand 21000 states and 31563 transitions. [2021-11-23 03:28:12,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-23 03:28:12,478 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:28:12,479 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:28:12,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 03:28:12,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:28:12,700 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:28:12,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:28:12,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1662895666, now seen corresponding path program 1 times [2021-11-23 03:28:12,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:28:12,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704270137] [2021-11-23 03:28:12,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:28:12,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:28:12,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:28:12,816 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-23 03:28:12,817 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:28:12,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704270137] [2021-11-23 03:28:12,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704270137] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:28:12,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689942631] [2021-11-23 03:28:12,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:28:12,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:28:12,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:28:12,819 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:28:12,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 03:28:13,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:28:13,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 956 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 03:28:13,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:28:13,276 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 03:28:13,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:28:13,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689942631] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:28:13,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:28:13,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2021-11-23 03:28:13,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033994179] [2021-11-23 03:28:13,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:28:13,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:28:13,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:28:13,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:28:13,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:28:13,279 INFO L87 Difference]: Start difference. First operand 21000 states and 31563 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 03:28:15,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:28:15,356 INFO L93 Difference]: Finished difference Result 62605 states and 95568 transitions. [2021-11-23 03:28:15,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:28:15,357 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 135 [2021-11-23 03:28:15,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:28:15,751 INFO L225 Difference]: With dead ends: 62605 [2021-11-23 03:28:15,752 INFO L226 Difference]: Without dead ends: 41610 [2021-11-23 03:28:15,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:28:15,826 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 235 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:28:15,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 482 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:28:15,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41610 states. [2021-11-23 03:28:17,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41610 to 41480. [2021-11-23 03:28:17,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41480 states, 35203 states have (on average 1.4945033093770417) internal successors, (52611), 35332 states have internal predecessors, (52611), 4740 states have call successors, (4740), 1536 states have call predecessors, (4740), 1536 states have return successors, (4740), 4612 states have call predecessors, (4740), 4740 states have call successors, (4740) [2021-11-23 03:28:18,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41480 states to 41480 states and 62091 transitions. [2021-11-23 03:28:18,325 INFO L78 Accepts]: Start accepts. Automaton has 41480 states and 62091 transitions. Word has length 135 [2021-11-23 03:28:18,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:28:18,327 INFO L470 AbstractCegarLoop]: Abstraction has 41480 states and 62091 transitions. [2021-11-23 03:28:18,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 03:28:18,327 INFO L276 IsEmpty]: Start isEmpty. Operand 41480 states and 62091 transitions. [2021-11-23 03:28:18,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-23 03:28:18,470 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:28:18,470 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:28:18,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 03:28:18,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf6974ec-a188-45c5-b059-1ca12427355c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-23 03:28:18,684 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:28:18,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:28:18,684 INFO L85 PathProgramCache]: Analyzing trace with hash 2056990958, now seen corresponding path program 1 times [2021-11-23 03:28:18,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:28:18,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289159099] [2021-11-23 03:28:18,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:28:18,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:28:18,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:28:18,860 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-23 03:28:18,860 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:28:18,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289159099] [2021-11-23 03:28:18,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289159099] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:28:18,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:28:18,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 03:28:18,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318604811] [2021-11-23 03:28:18,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:28:18,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:28:18,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:28:18,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:28:18,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:28:18,866 INFO L87 Difference]: Start difference. First operand 41480 states and 62091 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-23 03:28:22,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:28:22,303 INFO L93 Difference]: Finished difference Result 113420 states and 169933 transitions. [2021-11-23 03:28:22,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:28:22,304 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 135 [2021-11-23 03:28:22,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:28:23,013 INFO L225 Difference]: With dead ends: 113420 [2021-11-23 03:28:23,014 INFO L226 Difference]: Without dead ends: 71946 [2021-11-23 03:28:23,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-23 03:28:23,315 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 968 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 974 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:28:23,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [974 Valid, 816 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 03:28:23,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71946 states. [2021-11-23 03:28:26,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71946 to 61704. [2021-11-23 03:28:26,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61704 states, 52355 states have (on average 1.4901919587431955) internal successors, (78019), 52548 states have internal predecessors, (78019), 7044 states have call successors, (7044), 2304 states have call predecessors, (7044), 2304 states have return successors, (7044), 6852 states have call predecessors, (7044), 7044 states have call successors, (7044) [2021-11-23 03:28:26,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61704 states to 61704 states and 92107 transitions. [2021-11-23 03:28:26,527 INFO L78 Accepts]: Start accepts. Automaton has 61704 states and 92107 transitions. Word has length 135 [2021-11-23 03:28:26,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:28:26,529 INFO L470 AbstractCegarLoop]: Abstraction has 61704 states and 92107 transitions. [2021-11-23 03:28:26,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-23 03:28:26,529 INFO L276 IsEmpty]: Start isEmpty. Operand 61704 states and 92107 transitions. [2021-11-23 03:28:26,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-23 03:28:26,602 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:28:26,602 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:28:26,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 03:28:26,603 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:28:26,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:28:26,604 INFO L85 PathProgramCache]: Analyzing trace with hash 487886790, now seen corresponding path program 1 times [2021-11-23 03:28:26,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:28:26,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541517097] [2021-11-23 03:28:26,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:28:26,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:28:26,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:28:26,762 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-23 03:28:26,763 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:28:26,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541517097] [2021-11-23 03:28:26,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541517097] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:28:26,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:28:26,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 03:28:26,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698018392] [2021-11-23 03:28:26,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:28:26,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:28:26,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:28:26,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:28:26,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:28:26,766 INFO L87 Difference]: Start difference. First operand 61704 states and 92107 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-23 03:28:32,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:28:32,660 INFO L93 Difference]: Finished difference Result 216332 states and 322510 transitions. [2021-11-23 03:28:32,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:28:32,672 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 136 [2021-11-23 03:28:32,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:28:33,579 INFO L225 Difference]: With dead ends: 216332 [2021-11-23 03:28:33,579 INFO L226 Difference]: Without dead ends: 154634 [2021-11-23 03:28:33,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-23 03:28:33,797 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 1130 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1151 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:28:33,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1151 Valid, 717 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 03:28:33,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154634 states. [2021-11-23 03:28:39,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154634 to 121096. [2021-11-23 03:28:39,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121096 states, 102787 states have (on average 1.4844192358955899) internal successors, (152579), 103172 states have internal predecessors, (152579), 13700 states have call successors, (13700), 4608 states have call predecessors, (13700), 4608 states have return successors, (13700), 13316 states have call predecessors, (13700), 13700 states have call successors, (13700) [2021-11-23 03:28:40,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121096 states to 121096 states and 179979 transitions. [2021-11-23 03:28:40,823 INFO L78 Accepts]: Start accepts. Automaton has 121096 states and 179979 transitions. Word has length 136 [2021-11-23 03:28:40,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:28:40,824 INFO L470 AbstractCegarLoop]: Abstraction has 121096 states and 179979 transitions. [2021-11-23 03:28:40,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-23 03:28:40,825 INFO L276 IsEmpty]: Start isEmpty. Operand 121096 states and 179979 transitions. [2021-11-23 03:28:41,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-23 03:28:41,008 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:28:41,008 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:28:41,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 03:28:41,009 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:28:41,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:28:41,010 INFO L85 PathProgramCache]: Analyzing trace with hash -633911574, now seen corresponding path program 1 times [2021-11-23 03:28:41,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:28:41,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854602638] [2021-11-23 03:28:41,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:28:41,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:28:41,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:28:41,162 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-23 03:28:41,162 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:28:41,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854602638] [2021-11-23 03:28:41,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854602638] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:28:41,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:28:41,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 03:28:41,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502590664] [2021-11-23 03:28:41,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:28:41,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:28:41,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:28:41,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:28:41,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:28:41,166 INFO L87 Difference]: Start difference. First operand 121096 states and 179979 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-23 03:28:50,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:28:50,364 INFO L93 Difference]: Finished difference Result 329228 states and 490381 transitions. [2021-11-23 03:28:50,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:28:50,365 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 137 [2021-11-23 03:28:50,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:28:51,528 INFO L225 Difference]: With dead ends: 329228 [2021-11-23 03:28:51,528 INFO L226 Difference]: Without dead ends: 208138 [2021-11-23 03:28:52,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-23 03:28:52,305 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 916 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:28:52,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [922 Valid, 935 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 03:28:52,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208138 states.