./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.12.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6af8435d-e2fb-407b-806e-e559473ade7c/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6af8435d-e2fb-407b-806e-e559473ade7c/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6af8435d-e2fb-407b-806e-e559473ade7c/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6af8435d-e2fb-407b-806e-e559473ade7c/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.12.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6af8435d-e2fb-407b-806e-e559473ade7c/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6af8435d-e2fb-407b-806e-e559473ade7c/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bc6dc2c99e05b6915f0a2e5b5d96221c996d96767aaa6be997dea59c4d6f5f0a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:43:42,453 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:43:42,457 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:43:42,528 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:43:42,529 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:43:42,533 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:43:42,536 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:43:42,540 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:43:42,543 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:43:42,549 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:43:42,550 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:43:42,552 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:43:42,552 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:43:42,555 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:43:42,558 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:43:42,562 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:43:42,564 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:43:42,566 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:43:42,568 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:43:42,577 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:43:42,579 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:43:42,580 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:43:42,584 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:43:42,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:43:42,594 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:43:42,594 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:43:42,595 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:43:42,597 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:43:42,598 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:43:42,599 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:43:42,600 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:43:42,601 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:43:42,603 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:43:42,604 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:43:42,606 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:43:42,606 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:43:42,607 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:43:42,607 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:43:42,608 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:43:42,609 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:43:42,610 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:43:42,610 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6af8435d-e2fb-407b-806e-e559473ade7c/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:43:42,653 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:43:42,653 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:43:42,655 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:43:42,655 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:43:42,656 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:43:42,656 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:43:42,656 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:43:42,656 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:43:42,663 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:43:42,663 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:43:42,664 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:43:42,664 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:43:42,665 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:43:42,665 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:43:42,665 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:43:42,666 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:43:42,666 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:43:42,667 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:43:42,667 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:43:42,667 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:43:42,667 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:43:42,668 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:43:42,668 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:43:42,668 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:43:42,668 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:43:42,669 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:43:42,669 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:43:42,669 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:43:42,669 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:43:42,671 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:43:42,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:43:42,671 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:43:42,672 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:43:42,672 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:43:42,672 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:43:42,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:43:42,673 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:43:42,673 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:43:42,673 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:43:42,673 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_6af8435d-e2fb-407b-806e-e559473ade7c/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6af8435d-e2fb-407b-806e-e559473ade7c/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bc6dc2c99e05b6915f0a2e5b5d96221c996d96767aaa6be997dea59c4d6f5f0a [2021-11-07 01:43:42,972 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:43:42,998 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:43:43,001 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:43:43,002 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:43:43,003 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:43:43,004 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6af8435d-e2fb-407b-806e-e559473ade7c/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/systemc/token_ring.12.cil-2.c [2021-11-07 01:43:43,100 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6af8435d-e2fb-407b-806e-e559473ade7c/bin/utaipan-UUZaoUuFF8/data/9c83ecee0/98b68daccb8e4271a59d523b809500c0/FLAG7d31f46de [2021-11-07 01:43:43,645 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:43:43,645 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6af8435d-e2fb-407b-806e-e559473ade7c/sv-benchmarks/c/systemc/token_ring.12.cil-2.c [2021-11-07 01:43:43,668 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6af8435d-e2fb-407b-806e-e559473ade7c/bin/utaipan-UUZaoUuFF8/data/9c83ecee0/98b68daccb8e4271a59d523b809500c0/FLAG7d31f46de [2021-11-07 01:43:43,953 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6af8435d-e2fb-407b-806e-e559473ade7c/bin/utaipan-UUZaoUuFF8/data/9c83ecee0/98b68daccb8e4271a59d523b809500c0 [2021-11-07 01:43:43,958 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:43:43,960 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:43:43,965 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:43:43,965 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:43:43,970 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:43:43,971 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:43:43" (1/1) ... [2021-11-07 01:43:43,973 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cbabbc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:43, skipping insertion in model container [2021-11-07 01:43:43,973 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:43:43" (1/1) ... [2021-11-07 01:43:43,982 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:43:44,059 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:43:44,321 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_6af8435d-e2fb-407b-806e-e559473ade7c/sv-benchmarks/c/systemc/token_ring.12.cil-2.c[671,684] [2021-11-07 01:43:44,503 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:43:44,516 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:43:44,530 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_6af8435d-e2fb-407b-806e-e559473ade7c/sv-benchmarks/c/systemc/token_ring.12.cil-2.c[671,684] [2021-11-07 01:43:44,611 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:43:44,634 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:43:44,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:44 WrapperNode [2021-11-07 01:43:44,635 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:43:44,636 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:43:44,637 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:43:44,637 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:43:44,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:44" (1/1) ... [2021-11-07 01:43:44,660 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:44" (1/1) ... [2021-11-07 01:43:44,784 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:43:44,785 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:43:44,785 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:43:44,785 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:43:44,795 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:44" (1/1) ... [2021-11-07 01:43:44,796 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:44" (1/1) ... [2021-11-07 01:43:44,808 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:44" (1/1) ... [2021-11-07 01:43:44,808 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:44" (1/1) ... [2021-11-07 01:43:44,859 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:44" (1/1) ... [2021-11-07 01:43:44,916 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:44" (1/1) ... [2021-11-07 01:43:44,927 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:44" (1/1) ... [2021-11-07 01:43:44,990 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:43:44,991 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:43:44,991 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:43:44,991 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:43:45,009 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:44" (1/1) ... [2021-11-07 01:43:45,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:43:45,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6af8435d-e2fb-407b-806e-e559473ade7c/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:43:45,103 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6af8435d-e2fb-407b-806e-e559473ade7c/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:43:45,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6af8435d-e2fb-407b-806e-e559473ade7c/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:43:45,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:43:45,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 01:43:45,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:43:45,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:43:53,698 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:43:53,699 INFO L299 CfgBuilder]: Removed 553 assume(true) statements. [2021-11-07 01:43:53,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:43:53 BoogieIcfgContainer [2021-11-07 01:43:53,704 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:43:53,707 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:43:53,707 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:43:53,712 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:43:53,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:43:43" (1/3) ... [2021-11-07 01:43:53,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e566004 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:43:53, skipping insertion in model container [2021-11-07 01:43:53,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:44" (2/3) ... [2021-11-07 01:43:53,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e566004 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:43:53, skipping insertion in model container [2021-11-07 01:43:53,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:43:53" (3/3) ... [2021-11-07 01:43:53,716 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.12.cil-2.c [2021-11-07 01:43:53,723 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:43:53,723 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:43:53,802 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:43:53,809 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 [2021-11-07 01:43:53,810 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:43:53,855 INFO L276 IsEmpty]: Start isEmpty. Operand has 910 states, 908 states have (on average 1.524229074889868) internal successors, (1384), 909 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:53,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 01:43:53,864 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:53,865 INFO L513 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] [2021-11-07 01:43:53,866 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:43:53,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:53,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1431544659, now seen corresponding path program 1 times [2021-11-07 01:43:53,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:43:53,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687636371] [2021-11-07 01:43:53,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:53,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:43:54,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:54,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:54,260 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:43:54,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687636371] [2021-11-07 01:43:54,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687636371] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:54,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:54,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 01:43:54,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582444118] [2021-11-07 01:43:54,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:43:54,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:43:54,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:43:54,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:43:54,297 INFO L87 Difference]: Start difference. First operand has 910 states, 908 states have (on average 1.524229074889868) internal successors, (1384), 909 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:54,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:54,564 INFO L93 Difference]: Finished difference Result 2656 states and 4034 transitions. [2021-11-07 01:43:54,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:43:54,566 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-07 01:43:54,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:54,594 INFO L225 Difference]: With dead ends: 2656 [2021-11-07 01:43:54,594 INFO L226 Difference]: Without dead ends: 1744 [2021-11-07 01:43:54,602 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:43:54,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1744 states. [2021-11-07 01:43:54,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1744 to 1694. [2021-11-07 01:43:54,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1694 states, 1693 states have (on average 1.5067926757235677) internal successors, (2551), 1693 states have internal predecessors, (2551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:54,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1694 states to 1694 states and 2551 transitions. [2021-11-07 01:43:54,845 INFO L78 Accepts]: Start accepts. Automaton has 1694 states and 2551 transitions. Word has length 49 [2021-11-07 01:43:54,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:54,846 INFO L470 AbstractCegarLoop]: Abstraction has 1694 states and 2551 transitions. [2021-11-07 01:43:54,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:54,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1694 states and 2551 transitions. [2021-11-07 01:43:54,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-07 01:43:54,858 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:54,858 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:54,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:43:54,859 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:43:54,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:54,860 INFO L85 PathProgramCache]: Analyzing trace with hash -234755655, now seen corresponding path program 1 times [2021-11-07 01:43:54,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:43:54,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282373697] [2021-11-07 01:43:54,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:54,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:43:54,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:54,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:43:54,973 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:43:54,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282373697] [2021-11-07 01:43:54,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282373697] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:54,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:54,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 01:43:54,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187846695] [2021-11-07 01:43:54,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:43:54,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:43:54,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:43:54,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:43:54,978 INFO L87 Difference]: Start difference. First operand 1694 states and 2551 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:55,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:55,137 INFO L93 Difference]: Finished difference Result 4890 states and 7356 transitions. [2021-11-07 01:43:55,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:43:55,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-07 01:43:55,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:55,156 INFO L225 Difference]: With dead ends: 4890 [2021-11-07 01:43:55,157 INFO L226 Difference]: Without dead ends: 3205 [2021-11-07 01:43:55,160 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:43:55,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3205 states. [2021-11-07 01:43:55,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3205 to 3201. [2021-11-07 01:43:55,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3201 states, 3200 states have (on average 1.495) internal successors, (4784), 3200 states have internal predecessors, (4784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:55,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3201 states to 3201 states and 4784 transitions. [2021-11-07 01:43:55,275 INFO L78 Accepts]: Start accepts. Automaton has 3201 states and 4784 transitions. Word has length 106 [2021-11-07 01:43:55,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:55,276 INFO L470 AbstractCegarLoop]: Abstraction has 3201 states and 4784 transitions. [2021-11-07 01:43:55,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:55,276 INFO L276 IsEmpty]: Start isEmpty. Operand 3201 states and 4784 transitions. [2021-11-07 01:43:55,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-07 01:43:55,282 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:55,283 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:55,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 01:43:55,283 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:43:55,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:55,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1675866491, now seen corresponding path program 1 times [2021-11-07 01:43:55,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:43:55,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785276229] [2021-11-07 01:43:55,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:55,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:43:55,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:55,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:43:55,414 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:43:55,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785276229] [2021-11-07 01:43:55,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785276229] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:55,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:55,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:43:55,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290190737] [2021-11-07 01:43:55,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:43:55,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:43:55,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:43:55,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:55,419 INFO L87 Difference]: Start difference. First operand 3201 states and 4784 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:55,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:55,975 INFO L93 Difference]: Finished difference Result 12071 states and 17984 transitions. [2021-11-07 01:43:55,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:43:55,976 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-07 01:43:55,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:56,036 INFO L225 Difference]: With dead ends: 12071 [2021-11-07 01:43:56,036 INFO L226 Difference]: Without dead ends: 8875 [2021-11-07 01:43:56,045 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:43:56,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8875 states. [2021-11-07 01:43:56,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8875 to 8715. [2021-11-07 01:43:56,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8715 states, 8714 states have (on average 1.4709662611888914) internal successors, (12818), 8714 states have internal predecessors, (12818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:56,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8715 states to 8715 states and 12818 transitions. [2021-11-07 01:43:56,495 INFO L78 Accepts]: Start accepts. Automaton has 8715 states and 12818 transitions. Word has length 106 [2021-11-07 01:43:56,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:56,498 INFO L470 AbstractCegarLoop]: Abstraction has 8715 states and 12818 transitions. [2021-11-07 01:43:56,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:56,498 INFO L276 IsEmpty]: Start isEmpty. Operand 8715 states and 12818 transitions. [2021-11-07 01:43:56,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-07 01:43:56,516 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:56,517 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:56,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 01:43:56,517 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:43:56,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:56,519 INFO L85 PathProgramCache]: Analyzing trace with hash 907359836, now seen corresponding path program 1 times [2021-11-07 01:43:56,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:43:56,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666841522] [2021-11-07 01:43:56,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:56,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:43:56,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:43:56,669 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:43:56,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666841522] [2021-11-07 01:43:56,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666841522] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:56,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:56,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 01:43:56,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414744916] [2021-11-07 01:43:56,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:43:56,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:43:56,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:43:56,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:43:56,676 INFO L87 Difference]: Start difference. First operand 8715 states and 12818 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:57,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:57,307 INFO L93 Difference]: Finished difference Result 25333 states and 37212 transitions. [2021-11-07 01:43:57,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:43:57,308 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-07 01:43:57,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:57,421 INFO L225 Difference]: With dead ends: 25333 [2021-11-07 01:43:57,421 INFO L226 Difference]: Without dead ends: 16636 [2021-11-07 01:43:57,436 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:43:57,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16636 states. [2021-11-07 01:43:57,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16636 to 16622. [2021-11-07 01:43:58,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16622 states, 16621 states have (on average 1.4586968293123157) internal successors, (24245), 16621 states have internal predecessors, (24245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:58,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16622 states to 16622 states and 24245 transitions. [2021-11-07 01:43:58,081 INFO L78 Accepts]: Start accepts. Automaton has 16622 states and 24245 transitions. Word has length 106 [2021-11-07 01:43:58,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:58,081 INFO L470 AbstractCegarLoop]: Abstraction has 16622 states and 24245 transitions. [2021-11-07 01:43:58,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:58,084 INFO L276 IsEmpty]: Start isEmpty. Operand 16622 states and 24245 transitions. [2021-11-07 01:43:58,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-07 01:43:58,120 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:58,120 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:58,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 01:43:58,121 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:43:58,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:58,122 INFO L85 PathProgramCache]: Analyzing trace with hash 869913147, now seen corresponding path program 1 times [2021-11-07 01:43:58,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:43:58,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312712184] [2021-11-07 01:43:58,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:58,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:43:58,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:58,252 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:43:58,253 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:43:58,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312712184] [2021-11-07 01:43:58,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312712184] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:58,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:58,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:43:58,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996753028] [2021-11-07 01:43:58,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:43:58,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:43:58,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:43:58,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:58,258 INFO L87 Difference]: Start difference. First operand 16622 states and 24245 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:59,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:59,591 INFO L93 Difference]: Finished difference Result 63006 states and 91628 transitions. [2021-11-07 01:43:59,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:43:59,592 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-07 01:43:59,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:59,728 INFO L225 Difference]: With dead ends: 63006 [2021-11-07 01:43:59,728 INFO L226 Difference]: Without dead ends: 46409 [2021-11-07 01:43:59,761 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:43:59,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46409 states. [2021-11-07 01:44:01,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46409 to 45733. [2021-11-07 01:44:01,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45733 states, 45732 states have (on average 1.4362372080818682) internal successors, (65682), 45732 states have internal predecessors, (65682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:01,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45733 states to 45733 states and 65682 transitions. [2021-11-07 01:44:01,481 INFO L78 Accepts]: Start accepts. Automaton has 45733 states and 65682 transitions. Word has length 106 [2021-11-07 01:44:01,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:01,482 INFO L470 AbstractCegarLoop]: Abstraction has 45733 states and 65682 transitions. [2021-11-07 01:44:01,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:01,483 INFO L276 IsEmpty]: Start isEmpty. Operand 45733 states and 65682 transitions. [2021-11-07 01:44:01,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-07 01:44:01,554 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:01,554 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:01,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 01:44:01,555 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:44:01,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:01,556 INFO L85 PathProgramCache]: Analyzing trace with hash 415007066, now seen corresponding path program 1 times [2021-11-07 01:44:01,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:01,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084698016] [2021-11-07 01:44:01,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:01,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:01,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:01,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:44:01,670 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:01,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084698016] [2021-11-07 01:44:01,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084698016] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:01,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:01,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:44:01,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887171566] [2021-11-07 01:44:01,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:44:01,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:01,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:44:01,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:44:01,683 INFO L87 Difference]: Start difference. First operand 45733 states and 65682 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:04,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:04,762 INFO L93 Difference]: Finished difference Result 173397 states and 248317 transitions. [2021-11-07 01:44:04,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:44:04,763 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-07 01:44:04,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:05,365 INFO L225 Difference]: With dead ends: 173397 [2021-11-07 01:44:05,365 INFO L226 Difference]: Without dead ends: 127696 [2021-11-07 01:44:05,505 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:44:05,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127696 states. [2021-11-07 01:44:09,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127696 to 126268. [2021-11-07 01:44:09,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126268 states, 126267 states have (on average 1.4151520191340572) internal successors, (178687), 126267 states have internal predecessors, (178687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:09,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126268 states to 126268 states and 178687 transitions. [2021-11-07 01:44:09,780 INFO L78 Accepts]: Start accepts. Automaton has 126268 states and 178687 transitions. Word has length 106 [2021-11-07 01:44:09,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:09,781 INFO L470 AbstractCegarLoop]: Abstraction has 126268 states and 178687 transitions. [2021-11-07 01:44:09,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:09,781 INFO L276 IsEmpty]: Start isEmpty. Operand 126268 states and 178687 transitions. [2021-11-07 01:44:09,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-07 01:44:09,893 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:09,893 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:09,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 01:44:09,894 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:44:09,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:09,895 INFO L85 PathProgramCache]: Analyzing trace with hash 56829016, now seen corresponding path program 1 times [2021-11-07 01:44:09,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:09,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427539098] [2021-11-07 01:44:09,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:09,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:09,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:09,987 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:44:09,989 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:09,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427539098] [2021-11-07 01:44:09,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427539098] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:09,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:09,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:44:09,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589425942] [2021-11-07 01:44:09,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:44:09,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:10,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:44:10,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:44:10,011 INFO L87 Difference]: Start difference. First operand 126268 states and 178687 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:17,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:17,918 INFO L93 Difference]: Finished difference Result 477644 states and 674030 transitions. [2021-11-07 01:44:17,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:44:17,918 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-07 01:44:17,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:18,711 INFO L225 Difference]: With dead ends: 477644 [2021-11-07 01:44:18,711 INFO L226 Difference]: Without dead ends: 351415 [2021-11-07 01:44:18,910 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:44:19,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351415 states. [2021-11-07 01:44:28,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351415 to 348963. [2021-11-07 01:44:29,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348963 states, 348962 states have (on average 1.395212086129722) internal successors, (486876), 348962 states have internal predecessors, (486876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:30,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348963 states to 348963 states and 486876 transitions. [2021-11-07 01:44:30,283 INFO L78 Accepts]: Start accepts. Automaton has 348963 states and 486876 transitions. Word has length 106 [2021-11-07 01:44:30,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:30,283 INFO L470 AbstractCegarLoop]: Abstraction has 348963 states and 486876 transitions. [2021-11-07 01:44:30,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:30,284 INFO L276 IsEmpty]: Start isEmpty. Operand 348963 states and 486876 transitions. [2021-11-07 01:44:30,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-07 01:44:30,457 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:30,457 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:30,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 01:44:30,458 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:44:30,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:30,458 INFO L85 PathProgramCache]: Analyzing trace with hash 210197974, now seen corresponding path program 1 times [2021-11-07 01:44:30,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:30,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377458525] [2021-11-07 01:44:30,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:30,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:30,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:30,546 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:30,547 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:30,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377458525] [2021-11-07 01:44:30,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377458525] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:30,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:30,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:44:30,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106953634] [2021-11-07 01:44:30,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:44:30,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:30,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:44:30,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:44:30,550 INFO L87 Difference]: Start difference. First operand 348963 states and 486876 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)