./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.09.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61a33a4-2956-467e-947e-281946efd033/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61a33a4-2956-467e-947e-281946efd033/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61a33a4-2956-467e-947e-281946efd033/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61a33a4-2956-467e-947e-281946efd033/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.09.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61a33a4-2956-467e-947e-281946efd033/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61a33a4-2956-467e-947e-281946efd033/bin/utaipan-vmNK8stdcF --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 3945fa4b58cef50cb4b44b435a699812e99a1f6375664d08551274c6b50bee45 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:15:39,408 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:15:39,410 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:15:39,457 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:15:39,458 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:15:39,459 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:15:39,461 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:15:39,463 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:15:39,465 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:15:39,467 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:15:39,468 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:15:39,469 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:15:39,470 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:15:39,471 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:15:39,473 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:15:39,474 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:15:39,475 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:15:39,476 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:15:39,478 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:15:39,481 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:15:39,483 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:15:39,484 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:15:39,486 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:15:39,487 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:15:39,491 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:15:39,491 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:15:39,492 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:15:39,493 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:15:39,494 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:15:39,495 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:15:39,495 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:15:39,496 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:15:39,497 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:15:39,498 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:15:39,499 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:15:39,500 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:15:39,501 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:15:39,501 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:15:39,501 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:15:39,502 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:15:39,503 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:15:39,504 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61a33a4-2956-467e-947e-281946efd033/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:15:39,534 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:15:39,542 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:15:39,544 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:15:39,545 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:15:39,545 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:15:39,545 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:15:39,545 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:15:39,546 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:15:39,552 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:15:39,553 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:15:39,554 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:15:39,554 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:15:39,554 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:15:39,555 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:15:39,555 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:15:39,555 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:15:39,556 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:15:39,556 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:15:39,556 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:15:39,557 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:15:39,557 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:15:39,557 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:15:39,557 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:15:39,558 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:15:39,558 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:15:39,558 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:15:39,558 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:15:39,558 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:15:39,559 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:15:39,560 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:15:39,561 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:15:39,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:15:39,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:15:39,561 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:15:39,562 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:15:39,562 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:15:39,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:15:39,562 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:15:39,563 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:15:39,563 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:15:39,563 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_f61a33a4-2956-467e-947e-281946efd033/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61a33a4-2956-467e-947e-281946efd033/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3945fa4b58cef50cb4b44b435a699812e99a1f6375664d08551274c6b50bee45 [2021-11-12 22:15:39,857 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:15:39,883 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:15:39,886 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:15:39,887 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:15:39,888 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:15:39,889 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61a33a4-2956-467e-947e-281946efd033/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/systemc/transmitter.09.cil.c [2021-11-12 22:15:39,961 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61a33a4-2956-467e-947e-281946efd033/bin/utaipan-vmNK8stdcF/data/93adc07c3/017a782825af4de5a404ceff46cb6b72/FLAG14ccde298 [2021-11-12 22:15:40,434 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:15:40,435 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61a33a4-2956-467e-947e-281946efd033/sv-benchmarks/c/systemc/transmitter.09.cil.c [2021-11-12 22:15:40,460 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61a33a4-2956-467e-947e-281946efd033/bin/utaipan-vmNK8stdcF/data/93adc07c3/017a782825af4de5a404ceff46cb6b72/FLAG14ccde298 [2021-11-12 22:15:40,792 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61a33a4-2956-467e-947e-281946efd033/bin/utaipan-vmNK8stdcF/data/93adc07c3/017a782825af4de5a404ceff46cb6b72 [2021-11-12 22:15:40,795 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:15:40,796 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:15:40,798 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:15:40,798 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:15:40,801 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:15:40,802 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:15:40" (1/1) ... [2021-11-12 22:15:40,803 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a10e3f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:15:40, skipping insertion in model container [2021-11-12 22:15:40,804 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:15:40" (1/1) ... [2021-11-12 22:15:40,811 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:15:40,856 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:15:41,083 WARN L228 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_f61a33a4-2956-467e-947e-281946efd033/sv-benchmarks/c/systemc/transmitter.09.cil.c[706,719] [2021-11-12 22:15:41,235 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:15:41,254 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:15:41,269 WARN L228 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_f61a33a4-2956-467e-947e-281946efd033/sv-benchmarks/c/systemc/transmitter.09.cil.c[706,719] [2021-11-12 22:15:41,361 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:15:41,381 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:15:41,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:15:41 WrapperNode [2021-11-12 22:15:41,381 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:15:41,382 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:15:41,383 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:15:41,383 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:15:41,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:15:41" (1/1) ... [2021-11-12 22:15:41,400 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:15:41" (1/1) ... [2021-11-12 22:15:41,450 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:15:41,451 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:15:41,451 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:15:41,451 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:15:41,460 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:15:41" (1/1) ... [2021-11-12 22:15:41,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:15:41" (1/1) ... [2021-11-12 22:15:41,464 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:15:41" (1/1) ... [2021-11-12 22:15:41,465 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:15:41" (1/1) ... [2021-11-12 22:15:41,479 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:15:41" (1/1) ... [2021-11-12 22:15:41,494 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:15:41" (1/1) ... [2021-11-12 22:15:41,498 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:15:41" (1/1) ... [2021-11-12 22:15:41,511 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:15:41,512 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:15:41,512 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:15:41,512 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:15:41,516 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:15:41" (1/1) ... [2021-11-12 22:15:41,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:15:41,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61a33a4-2956-467e-947e-281946efd033/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:15:41,571 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61a33a4-2956-467e-947e-281946efd033/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:15:41,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61a33a4-2956-467e-947e-281946efd033/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:15:41,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:15:41,624 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-12 22:15:41,624 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-12 22:15:41,625 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-12 22:15:41,625 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-12 22:15:41,626 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-12 22:15:41,626 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-12 22:15:41,626 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-12 22:15:41,626 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-12 22:15:41,626 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-12 22:15:41,626 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-12 22:15:41,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 22:15:41,627 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-12 22:15:41,627 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-12 22:15:41,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:15:41,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:15:42,825 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:15:42,825 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-11-12 22:15:42,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:15:42 BoogieIcfgContainer [2021-11-12 22:15:42,828 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:15:42,830 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:15:42,830 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:15:42,833 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:15:42,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:15:40" (1/3) ... [2021-11-12 22:15:42,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@527c425 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:15:42, skipping insertion in model container [2021-11-12 22:15:42,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:15:41" (2/3) ... [2021-11-12 22:15:42,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@527c425 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:15:42, skipping insertion in model container [2021-11-12 22:15:42,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:15:42" (3/3) ... [2021-11-12 22:15:42,836 INFO L111 eAbstractionObserver]: Analyzing ICFG transmitter.09.cil.c [2021-11-12 22:15:42,841 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:15:42,842 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:15:42,891 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:15:42,898 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 [2021-11-12 22:15:42,898 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:15:42,919 INFO L276 IsEmpty]: Start isEmpty. Operand has 153 states, 123 states have (on average 1.5528455284552845) internal successors, (191), 125 states have internal predecessors, (191), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-12 22:15:42,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-12 22:15:42,929 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:15:42,930 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] [2021-11-12 22:15:42,930 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:15:42,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:15:42,936 INFO L85 PathProgramCache]: Analyzing trace with hash 451690190, now seen corresponding path program 1 times [2021-11-12 22:15:42,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:15:42,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124498404] [2021-11-12 22:15:42,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:15:42,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:15:43,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:15:43,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:15:43,233 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:15:43,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124498404] [2021-11-12 22:15:43,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124498404] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:15:43,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:15:43,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:15:43,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015096947] [2021-11-12 22:15:43,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:15:43,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:15:43,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:15:43,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:15:43,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:15:43,271 INFO L87 Difference]: Start difference. First operand has 153 states, 123 states have (on average 1.5528455284552845) internal successors, (191), 125 states have internal predecessors, (191), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2021-11-12 22:15:43,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:15:43,802 INFO L93 Difference]: Finished difference Result 442 states and 701 transitions. [2021-11-12 22:15:43,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:15:43,805 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 65 [2021-11-12 22:15:43,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:15:43,826 INFO L225 Difference]: With dead ends: 442 [2021-11-12 22:15:43,826 INFO L226 Difference]: Without dead ends: 290 [2021-11-12 22:15:43,835 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 [2021-11-12 22:15:43,842 INFO L933 BasicCegarLoop]: 354 mSDtfsCounter, 400 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 260.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.97ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 340.57ms IncrementalHoareTripleChecker+Time [2021-11-12 22:15:43,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 630 Invalid, 256 Unknown, 0 Unchecked, 13.97ms Time], IncrementalHoareTripleChecker [14 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 340.57ms Time] [2021-11-12 22:15:43,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-11-12 22:15:43,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 287. [2021-11-12 22:15:43,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 235 states have (on average 1.4978723404255319) internal successors, (352), 236 states have internal predecessors, (352), 39 states have call successors, (39), 12 states have call predecessors, (39), 12 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2021-11-12 22:15:43,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 430 transitions. [2021-11-12 22:15:43,914 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 430 transitions. Word has length 65 [2021-11-12 22:15:43,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:15:43,915 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 430 transitions. [2021-11-12 22:15:43,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2021-11-12 22:15:43,916 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 430 transitions. [2021-11-12 22:15:43,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-12 22:15:43,920 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:15:43,920 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] [2021-11-12 22:15:43,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 22:15:43,920 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:15:43,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:15:43,921 INFO L85 PathProgramCache]: Analyzing trace with hash -656438449, now seen corresponding path program 1 times [2021-11-12 22:15:43,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:15:43,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860238399] [2021-11-12 22:15:43,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:15:43,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:15:43,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:15:44,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:15:44,097 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:15:44,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860238399] [2021-11-12 22:15:44,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860238399] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:15:44,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:15:44,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-12 22:15:44,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12748998] [2021-11-12 22:15:44,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:15:44,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:15:44,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:15:44,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:15:44,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:15:44,110 INFO L87 Difference]: Start difference. First operand 287 states and 430 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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) [2021-11-12 22:15:44,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:15:44,744 INFO L93 Difference]: Finished difference Result 979 states and 1483 transitions. [2021-11-12 22:15:44,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:15:44,745 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 65 [2021-11-12 22:15:44,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:15:44,753 INFO L225 Difference]: With dead ends: 979 [2021-11-12 22:15:44,754 INFO L226 Difference]: Without dead ends: 674 [2021-11-12 22:15:44,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:15:44,765 INFO L933 BasicCegarLoop]: 379 mSDtfsCounter, 832 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 406.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.44ms SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 496.33ms IncrementalHoareTripleChecker+Time [2021-11-12 22:15:44,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [842 Valid, 1006 Invalid, 579 Unknown, 0 Unchecked, 15.44ms Time], IncrementalHoareTripleChecker [174 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 496.33ms Time] [2021-11-12 22:15:44,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-11-12 22:15:44,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 662. [2021-11-12 22:15:44,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 557 states have (on average 1.4901256732495511) internal successors, (830), 550 states have internal predecessors, (830), 76 states have call successors, (76), 26 states have call predecessors, (76), 28 states have return successors, (86), 86 states have call predecessors, (86), 76 states have call successors, (86) [2021-11-12 22:15:44,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 992 transitions. [2021-11-12 22:15:44,841 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 992 transitions. Word has length 65 [2021-11-12 22:15:44,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:15:44,841 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 992 transitions. [2021-11-12 22:15:44,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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) [2021-11-12 22:15:44,842 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 992 transitions. [2021-11-12 22:15:44,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-12 22:15:44,844 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:15:44,844 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] [2021-11-12 22:15:44,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-12 22:15:44,845 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:15:44,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:15:44,846 INFO L85 PathProgramCache]: Analyzing trace with hash 811764880, now seen corresponding path program 1 times [2021-11-12 22:15:44,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:15:44,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011596517] [2021-11-12 22:15:44,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:15:44,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:15:44,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:15:44,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:15:44,956 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:15:44,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011596517] [2021-11-12 22:15:44,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011596517] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:15:44,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:15:44,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-12 22:15:44,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271817041] [2021-11-12 22:15:44,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:15:44,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:15:44,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:15:44,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:15:44,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:15:44,960 INFO L87 Difference]: Start difference. First operand 662 states and 992 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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) [2021-11-12 22:15:45,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:15:45,569 INFO L93 Difference]: Finished difference Result 2313 states and 3512 transitions. [2021-11-12 22:15:45,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:15:45,570 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 65 [2021-11-12 22:15:45,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:15:45,585 INFO L225 Difference]: With dead ends: 2313 [2021-11-12 22:15:45,586 INFO L226 Difference]: Without dead ends: 1613 [2021-11-12 22:15:45,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:15:45,598 INFO L933 BasicCegarLoop]: 379 mSDtfsCounter, 832 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 391.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.39ms SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 471.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:15:45,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [842 Valid, 985 Invalid, 575 Unknown, 0 Unchecked, 12.39ms Time], IncrementalHoareTripleChecker [174 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 471.00ms Time] [2021-11-12 22:15:45,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2021-11-12 22:15:45,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 1257. [2021-11-12 22:15:45,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1060 states have (on average 1.490566037735849) internal successors, (1580), 1054 states have internal predecessors, (1580), 140 states have call successors, (140), 50 states have call predecessors, (140), 56 states have return successors, (169), 153 states have call predecessors, (169), 140 states have call successors, (169) [2021-11-12 22:15:45,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 1889 transitions. [2021-11-12 22:15:45,711 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 1889 transitions. Word has length 65 [2021-11-12 22:15:45,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:15:45,712 INFO L470 AbstractCegarLoop]: Abstraction has 1257 states and 1889 transitions. [2021-11-12 22:15:45,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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) [2021-11-12 22:15:45,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 1889 transitions. [2021-11-12 22:15:45,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-12 22:15:45,716 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:15:45,717 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] [2021-11-12 22:15:45,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-12 22:15:45,722 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:15:45,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:15:45,723 INFO L85 PathProgramCache]: Analyzing trace with hash -496239889, now seen corresponding path program 1 times [2021-11-12 22:15:45,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:15:45,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192210469] [2021-11-12 22:15:45,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:15:45,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:15:45,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:15:45,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:15:45,810 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:15:45,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192210469] [2021-11-12 22:15:45,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192210469] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:15:45,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:15:45,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-12 22:15:45,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002413463] [2021-11-12 22:15:45,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:15:45,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:15:45,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:15:45,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:15:45,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:15:45,813 INFO L87 Difference]: Start difference. First operand 1257 states and 1889 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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) [2021-11-12 22:15:46,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:15:46,372 INFO L93 Difference]: Finished difference Result 4326 states and 6607 transitions. [2021-11-12 22:15:46,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:15:46,372 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 65 [2021-11-12 22:15:46,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:15:46,400 INFO L225 Difference]: With dead ends: 4326 [2021-11-12 22:15:46,400 INFO L226 Difference]: Without dead ends: 2992 [2021-11-12 22:15:46,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:15:46,416 INFO L933 BasicCegarLoop]: 373 mSDtfsCounter, 832 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 331.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.55ms SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 392.65ms IncrementalHoareTripleChecker+Time [2021-11-12 22:15:46,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [842 Valid, 828 Invalid, 535 Unknown, 0 Unchecked, 8.55ms Time], IncrementalHoareTripleChecker [174 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 392.65ms Time] [2021-11-12 22:15:46,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2992 states. [2021-11-12 22:15:46,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2992 to 2421. [2021-11-12 22:15:46,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2421 states, 2044 states have (on average 1.4892367906066537) internal successors, (3044), 2042 states have internal predecessors, (3044), 264 states have call successors, (264), 98 states have call predecessors, (264), 112 states have return successors, (329), 281 states have call predecessors, (329), 264 states have call successors, (329) [2021-11-12 22:15:46,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2421 states to 2421 states and 3637 transitions. [2021-11-12 22:15:46,598 INFO L78 Accepts]: Start accepts. Automaton has 2421 states and 3637 transitions. Word has length 65 [2021-11-12 22:15:46,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:15:46,599 INFO L470 AbstractCegarLoop]: Abstraction has 2421 states and 3637 transitions. [2021-11-12 22:15:46,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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) [2021-11-12 22:15:46,599 INFO L276 IsEmpty]: Start isEmpty. Operand 2421 states and 3637 transitions. [2021-11-12 22:15:46,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-12 22:15:46,602 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:15:46,603 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] [2021-11-12 22:15:46,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-12 22:15:46,603 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:15:46,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:15:46,605 INFO L85 PathProgramCache]: Analyzing trace with hash -96248690, now seen corresponding path program 1 times [2021-11-12 22:15:46,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:15:46,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817753200] [2021-11-12 22:15:46,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:15:46,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:15:46,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:15:46,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:15:46,716 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:15:46,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817753200] [2021-11-12 22:15:46,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817753200] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:15:46,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:15:46,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-12 22:15:46,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959485829] [2021-11-12 22:15:46,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:15:46,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:15:46,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:15:46,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:15:46,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:15:46,719 INFO L87 Difference]: Start difference. First operand 2421 states and 3637 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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) [2021-11-12 22:15:47,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:15:47,378 INFO L93 Difference]: Finished difference Result 8194 states and 12531 transitions. [2021-11-12 22:15:47,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:15:47,384 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 65 [2021-11-12 22:15:47,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:15:47,435 INFO L225 Difference]: With dead ends: 8194 [2021-11-12 22:15:47,435 INFO L226 Difference]: Without dead ends: 5620 [2021-11-12 22:15:47,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:15:47,449 INFO L933 BasicCegarLoop]: 373 mSDtfsCounter, 832 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 316.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.22ms SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 385.50ms IncrementalHoareTripleChecker+Time [2021-11-12 22:15:47,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [842 Valid, 828 Invalid, 535 Unknown, 0 Unchecked, 6.22ms Time], IncrementalHoareTripleChecker [174 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 385.50ms Time] [2021-11-12 22:15:47,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5620 states. [2021-11-12 22:15:47,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5620 to 4709. [2021-11-12 22:15:47,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4709 states, 3980 states have (on average 1.48643216080402) internal successors, (5916), 3986 states have internal predecessors, (5916), 504 states have call successors, (504), 194 states have call predecessors, (504), 224 states have return successors, (637), 529 states have call predecessors, (637), 504 states have call successors, (637) [2021-11-12 22:15:47,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4709 states to 4709 states and 7057 transitions. [2021-11-12 22:15:47,768 INFO L78 Accepts]: Start accepts. Automaton has 4709 states and 7057 transitions. Word has length 65 [2021-11-12 22:15:47,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:15:47,768 INFO L470 AbstractCegarLoop]: Abstraction has 4709 states and 7057 transitions. [2021-11-12 22:15:47,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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) [2021-11-12 22:15:47,769 INFO L276 IsEmpty]: Start isEmpty. Operand 4709 states and 7057 transitions. [2021-11-12 22:15:47,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-12 22:15:47,770 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:15:47,770 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] [2021-11-12 22:15:47,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-12 22:15:47,771 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:15:47,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:15:47,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1724898963, now seen corresponding path program 1 times [2021-11-12 22:15:47,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:15:47,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922358904] [2021-11-12 22:15:47,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:15:47,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:15:47,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:15:47,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:15:47,832 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:15:47,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922358904] [2021-11-12 22:15:47,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922358904] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:15:47,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:15:47,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-12 22:15:47,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083253817] [2021-11-12 22:15:47,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:15:47,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:15:47,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:15:47,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:15:47,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:15:47,834 INFO L87 Difference]: Start difference. First operand 4709 states and 7057 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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) [2021-11-12 22:15:48,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:15:48,691 INFO L93 Difference]: Finished difference Result 15740 states and 24085 transitions. [2021-11-12 22:15:48,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:15:48,691 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 65 [2021-11-12 22:15:48,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:15:48,772 INFO L225 Difference]: With dead ends: 15740 [2021-11-12 22:15:48,773 INFO L226 Difference]: Without dead ends: 10730 [2021-11-12 22:15:48,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:15:48,797 INFO L933 BasicCegarLoop]: 376 mSDtfsCounter, 834 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 310.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.06ms SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 379.31ms IncrementalHoareTripleChecker+Time [2021-11-12 22:15:48,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [845 Valid, 829 Invalid, 545 Unknown, 0 Unchecked, 6.06ms Time], IncrementalHoareTripleChecker [179 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 379.31ms Time] [2021-11-12 22:15:48,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10730 states. [2021-11-12 22:15:49,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10730 to 9245. [2021-11-12 22:15:49,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9245 states, 7796 states have (on average 1.4807593637762955) internal successors, (11544), 7818 states have internal predecessors, (11544), 1000 states have call successors, (1000), 386 states have call predecessors, (1000), 448 states have return successors, (1277), 1041 states have call predecessors, (1277), 1000 states have call successors, (1277) [2021-11-12 22:15:49,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9245 states to 9245 states and 13821 transitions. [2021-11-12 22:15:49,439 INFO L78 Accepts]: Start accepts. Automaton has 9245 states and 13821 transitions. Word has length 65 [2021-11-12 22:15:49,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:15:49,440 INFO L470 AbstractCegarLoop]: Abstraction has 9245 states and 13821 transitions. [2021-11-12 22:15:49,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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) [2021-11-12 22:15:49,440 INFO L276 IsEmpty]: Start isEmpty. Operand 9245 states and 13821 transitions. [2021-11-12 22:15:49,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-12 22:15:49,448 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:15:49,448 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:15:49,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-12 22:15:49,449 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:15:49,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:15:49,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1030161032, now seen corresponding path program 1 times [2021-11-12 22:15:49,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:15:49,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355538134] [2021-11-12 22:15:49,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:15:49,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:15:49,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:15:49,534 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 22:15:49,535 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:15:49,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355538134] [2021-11-12 22:15:49,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355538134] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:15:49,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:15:49,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 22:15:49,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780258177] [2021-11-12 22:15:49,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:15:49,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:15:49,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:15:49,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:15:49,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:15:49,539 INFO L87 Difference]: Start difference. First operand 9245 states and 13821 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-12 22:15:50,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:15:50,646 INFO L93 Difference]: Finished difference Result 28878 states and 43353 transitions. [2021-11-12 22:15:50,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:15:50,647 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 84 [2021-11-12 22:15:50,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:15:50,854 INFO L225 Difference]: With dead ends: 28878 [2021-11-12 22:15:50,854 INFO L226 Difference]: Without dead ends: 19639 [2021-11-12 22:15:50,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:15:50,889 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 844 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 236.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.34ms SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 304.94ms IncrementalHoareTripleChecker+Time [2021-11-12 22:15:50,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [851 Valid, 562 Invalid, 377 Unknown, 0 Unchecked, 8.34ms Time], IncrementalHoareTripleChecker [137 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 304.94ms Time] [2021-11-12 22:15:50,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19639 states. [2021-11-12 22:15:51,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19639 to 15551. [2021-11-12 22:15:51,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15551 states, 13266 states have (on average 1.4672847881803106) internal successors, (19465), 13309 states have internal predecessors, (19465), 1516 states have call successors, (1516), 644 states have call predecessors, (1516), 768 states have return successors, (2070), 1598 states have call predecessors, (2070), 1516 states have call successors, (2070) [2021-11-12 22:15:51,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15551 states to 15551 states and 23051 transitions. [2021-11-12 22:15:51,944 INFO L78 Accepts]: Start accepts. Automaton has 15551 states and 23051 transitions. Word has length 84 [2021-11-12 22:15:51,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:15:51,945 INFO L470 AbstractCegarLoop]: Abstraction has 15551 states and 23051 transitions. [2021-11-12 22:15:51,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-12 22:15:51,946 INFO L276 IsEmpty]: Start isEmpty. Operand 15551 states and 23051 transitions. [2021-11-12 22:15:51,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-12 22:15:51,960 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:15:51,960 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:15:51,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-12 22:15:51,960 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:15:51,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:15:51,962 INFO L85 PathProgramCache]: Analyzing trace with hash 811186100, now seen corresponding path program 1 times [2021-11-12 22:15:51,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:15:51,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620016839] [2021-11-12 22:15:51,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:15:51,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:15:51,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:15:52,082 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:15:52,082 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:15:52,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620016839] [2021-11-12 22:15:52,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620016839] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:15:52,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:15:52,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 22:15:52,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973359278] [2021-11-12 22:15:52,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:15:52,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:15:52,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:15:52,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:15:52,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:15:52,086 INFO L87 Difference]: Start difference. First operand 15551 states and 23051 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-12 22:15:54,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:15:54,119 INFO L93 Difference]: Finished difference Result 57875 states and 86036 transitions. [2021-11-12 22:15:54,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:15:54,120 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 86 [2021-11-12 22:15:54,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:15:54,476 INFO L225 Difference]: With dead ends: 57875 [2021-11-12 22:15:54,476 INFO L226 Difference]: Without dead ends: 42330 [2021-11-12 22:15:54,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:15:54,527 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 873 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 237.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 890 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.20ms SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 294.10ms IncrementalHoareTripleChecker+Time [2021-11-12 22:15:54,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [890 Valid, 533 Invalid, 375 Unknown, 0 Unchecked, 6.20ms Time], IncrementalHoareTripleChecker [137 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 294.10ms Time] [2021-11-12 22:15:54,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42330 states. [2021-11-12 22:15:56,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42330 to 30508. [2021-11-12 22:15:56,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30508 states, 26039 states have (on average 1.4611544222128345) internal successors, (38047), 26126 states have internal predecessors, (38047), 2932 states have call successors, (2932), 1288 states have call predecessors, (2932), 1536 states have return successors, (3978), 3094 states have call predecessors, (3978), 2932 states have call successors, (3978) [2021-11-12 22:15:56,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30508 states to 30508 states and 44957 transitions. [2021-11-12 22:15:56,562 INFO L78 Accepts]: Start accepts. Automaton has 30508 states and 44957 transitions. Word has length 86 [2021-11-12 22:15:56,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:15:56,563 INFO L470 AbstractCegarLoop]: Abstraction has 30508 states and 44957 transitions. [2021-11-12 22:15:56,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-12 22:15:56,563 INFO L276 IsEmpty]: Start isEmpty. Operand 30508 states and 44957 transitions. [2021-11-12 22:15:56,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-12 22:15:56,580 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:15:56,580 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:15:56,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-12 22:15:56,581 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:15:56,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:15:56,581 INFO L85 PathProgramCache]: Analyzing trace with hash -623132136, now seen corresponding path program 1 times [2021-11-12 22:15:56,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:15:56,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629329345] [2021-11-12 22:15:56,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:15:56,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:15:56,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:15:56,739 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:15:56,740 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:15:56,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629329345] [2021-11-12 22:15:56,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629329345] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:15:56,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:15:56,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 22:15:56,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892942750] [2021-11-12 22:15:56,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:15:56,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:15:56,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:15:56,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:15:56,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:15:56,743 INFO L87 Difference]: Start difference. First operand 30508 states and 44957 transitions. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-12 22:15:59,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:15:59,501 INFO L93 Difference]: Finished difference Result 87772 states and 129969 transitions. [2021-11-12 22:15:59,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:15:59,505 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 88 [2021-11-12 22:15:59,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:15:59,758 INFO L225 Difference]: With dead ends: 87772 [2021-11-12 22:15:59,758 INFO L226 Difference]: Without dead ends: 57270 [2021-11-12 22:15:59,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:15:59,832 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 715 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 296.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.02ms SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 367.69ms IncrementalHoareTripleChecker+Time [2021-11-12 22:15:59,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [721 Valid, 720 Invalid, 458 Unknown, 0 Unchecked, 7.02ms Time], IncrementalHoareTripleChecker [137 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 367.69ms Time] [2021-11-12 22:15:59,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57270 states. [2021-11-12 22:16:02,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57270 to 45148. [2021-11-12 22:16:02,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45148 states, 38487 states have (on average 1.4557383012445761) internal successors, (56027), 38600 states have internal predecessors, (56027), 4356 states have call successors, (4356), 1936 states have call predecessors, (4356), 2304 states have return successors, (5876), 4612 states have call predecessors, (5876), 4356 states have call successors, (5876) [2021-11-12 22:16:02,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45148 states to 45148 states and 66259 transitions. [2021-11-12 22:16:02,663 INFO L78 Accepts]: Start accepts. Automaton has 45148 states and 66259 transitions. Word has length 88 [2021-11-12 22:16:02,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:16:02,664 INFO L470 AbstractCegarLoop]: Abstraction has 45148 states and 66259 transitions. [2021-11-12 22:16:02,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-12 22:16:02,664 INFO L276 IsEmpty]: Start isEmpty. Operand 45148 states and 66259 transitions. [2021-11-12 22:16:02,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-12 22:16:02,690 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:16:02,690 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:16:02,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-12 22:16:02,690 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:16:02,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:16:02,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1657797372, now seen corresponding path program 1 times [2021-11-12 22:16:02,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:16:02,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366029656] [2021-11-12 22:16:02,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:16:02,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:16:02,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:16:02,814 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 22:16:02,815 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:16:02,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366029656] [2021-11-12 22:16:02,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366029656] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:16:02,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:16:02,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 22:16:02,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136921055] [2021-11-12 22:16:02,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:16:02,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:16:02,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:16:02,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:16:02,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:16:02,817 INFO L87 Difference]: Start difference. First operand 45148 states and 66259 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-12 22:16:06,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:16:06,432 INFO L93 Difference]: Finished difference Result 127928 states and 188853 transitions. [2021-11-12 22:16:06,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:16:06,433 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 90 [2021-11-12 22:16:06,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:16:06,834 INFO L225 Difference]: With dead ends: 127928 [2021-11-12 22:16:06,834 INFO L226 Difference]: Without dead ends: 82786 [2021-11-12 22:16:06,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:16:06,970 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 698 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 568.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.58ms SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 629.04ms IncrementalHoareTripleChecker+Time [2021-11-12 22:16:06,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [704 Valid, 705 Invalid, 455 Unknown, 0 Unchecked, 21.58ms Time], IncrementalHoareTripleChecker [137 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 629.04ms Time] [2021-11-12 22:16:07,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82786 states. [2021-11-12 22:16:10,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82786 to 66928. [2021-11-12 22:16:10,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66928 states, 56995 states have (on average 1.4501447495394333) internal successors, (82651), 57132 states have internal predecessors, (82651), 6476 states have call successors, (6476), 2912 states have call predecessors, (6476), 3456 states have return successors, (8676), 6884 states have call predecessors, (8676), 6476 states have call successors, (8676) [2021-11-12 22:16:11,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66928 states to 66928 states and 97803 transitions. [2021-11-12 22:16:11,021 INFO L78 Accepts]: Start accepts. Automaton has 66928 states and 97803 transitions. Word has length 90 [2021-11-12 22:16:11,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:16:11,023 INFO L470 AbstractCegarLoop]: Abstraction has 66928 states and 97803 transitions. [2021-11-12 22:16:11,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-12 22:16:11,024 INFO L276 IsEmpty]: Start isEmpty. Operand 66928 states and 97803 transitions. [2021-11-12 22:16:11,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-12 22:16:11,050 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:16:11,051 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:16:11,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-12 22:16:11,052 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:16:11,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:16:11,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1782043176, now seen corresponding path program 1 times [2021-11-12 22:16:11,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:16:11,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235278876] [2021-11-12 22:16:11,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:16:11,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:16:11,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:16:11,167 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:16:11,167 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:16:11,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235278876] [2021-11-12 22:16:11,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235278876] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:16:11,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:16:11,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 22:16:11,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770648158] [2021-11-12 22:16:11,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:16:11,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:16:11,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:16:11,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:16:11,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:16:11,171 INFO L87 Difference]: Start difference. First operand 66928 states and 97803 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-12 22:16:18,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:16:18,190 INFO L93 Difference]: Finished difference Result 233908 states and 343854 transitions. [2021-11-12 22:16:18,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:16:18,190 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 92 [2021-11-12 22:16:18,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:16:19,076 INFO L225 Difference]: With dead ends: 233908 [2021-11-12 22:16:19,076 INFO L226 Difference]: Without dead ends: 166986 [2021-11-12 22:16:19,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:16:19,201 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 764 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 263.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 781 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.43ms SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 318.10ms IncrementalHoareTripleChecker+Time [2021-11-12 22:16:19,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [781 Valid, 518 Invalid, 374 Unknown, 0 Unchecked, 5.43ms Time], IncrementalHoareTripleChecker [141 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 318.10ms Time] [2021-11-12 22:16:19,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166986 states. [2021-11-12 22:16:25,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166986 to 131176. [2021-11-12 22:16:25,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131176 states, 111747 states have (on average 1.443287068109211) internal successors, (161283), 112036 states have internal predecessors, (161283), 12516 states have call successors, (12516), 5824 states have call predecessors, (12516), 6912 states have return successors, (16644), 13316 states have call predecessors, (16644), 12516 states have call successors, (16644) [2021-11-12 22:16:26,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131176 states to 131176 states and 190443 transitions. [2021-11-12 22:16:26,313 INFO L78 Accepts]: Start accepts. Automaton has 131176 states and 190443 transitions. Word has length 92 [2021-11-12 22:16:26,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:16:26,314 INFO L470 AbstractCegarLoop]: Abstraction has 131176 states and 190443 transitions. [2021-11-12 22:16:26,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-12 22:16:26,314 INFO L276 IsEmpty]: Start isEmpty. Operand 131176 states and 190443 transitions. [2021-11-12 22:16:26,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-12 22:16:26,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:16:26,365 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:16:26,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-12 22:16:26,366 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:16:26,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:16:26,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1680950204, now seen corresponding path program 1 times [2021-11-12 22:16:26,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:16:26,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575969359] [2021-11-12 22:16:26,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:16:26,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:16:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:16:26,459 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 22:16:26,459 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:16:26,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575969359] [2021-11-12 22:16:26,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575969359] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:16:26,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:16:26,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 22:16:26,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698073575] [2021-11-12 22:16:26,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:16:26,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:16:26,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:16:26,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:16:26,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:16:26,461 INFO L87 Difference]: Start difference. First operand 131176 states and 190443 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6)