./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-wmm/safe019_pso.opt.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d211c834-5311-4089-852a-63aaae98c056/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d211c834-5311-4089-852a-63aaae98c056/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d211c834-5311-4089-852a-63aaae98c056/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d211c834-5311-4089-852a-63aaae98c056/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-wmm/safe019_pso.opt.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d211c834-5311-4089-852a-63aaae98c056/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d211c834-5311-4089-852a-63aaae98c056/bin/utaipan-q2qaUkNPG8 --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 f43935362c1335f4f9734ddabaed6e8642550761 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:19:40,024 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:19:40,028 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:19:40,080 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:19:40,080 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:19:40,085 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:19:40,086 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:19:40,090 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:19:40,093 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:19:40,099 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:19:40,100 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:19:40,102 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:19:40,102 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:19:40,105 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:19:40,107 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:19:40,113 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:19:40,117 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:19:40,118 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:19:40,121 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:19:40,131 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:19:40,133 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:19:40,134 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:19:40,137 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:19:40,138 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:19:40,147 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:19:40,147 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:19:40,148 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:19:40,150 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:19:40,150 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:19:40,152 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:19:40,152 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:19:40,153 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:19:40,155 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:19:40,156 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:19:40,158 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:19:40,158 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:19:40,159 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:19:40,159 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:19:40,159 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:19:40,160 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:19:40,161 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:19:40,162 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d211c834-5311-4089-852a-63aaae98c056/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:19:40,207 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:19:40,207 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:19:40,208 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:19:40,209 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:19:40,209 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:19:40,209 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:19:40,209 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:19:40,209 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:19:40,216 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:19:40,216 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:19:40,217 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:19:40,217 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:19:40,218 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:19:40,218 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:19:40,218 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:19:40,219 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:19:40,219 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:19:40,219 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:19:40,220 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:19:40,220 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:19:40,220 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:19:40,220 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:19:40,220 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:19:40,221 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:19:40,221 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:19:40,221 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:19:40,221 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:19:40,221 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:19:40,222 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:19:40,224 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:19:40,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:19:40,224 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:19:40,224 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:19:40,225 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:19:40,225 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:19:40,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:19:40,225 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:19:40,225 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:19:40,226 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:19:40,226 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_d211c834-5311-4089-852a-63aaae98c056/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d211c834-5311-4089-852a-63aaae98c056/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f43935362c1335f4f9734ddabaed6e8642550761 [2021-10-13 07:19:40,494 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:19:40,525 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:19:40,527 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:19:40,529 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:19:40,530 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:19:40,531 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d211c834-5311-4089-852a-63aaae98c056/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/pthread-wmm/safe019_pso.opt.i [2021-10-13 07:19:40,612 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d211c834-5311-4089-852a-63aaae98c056/bin/utaipan-q2qaUkNPG8/data/5c42bc206/9c1e2434c5dc45228db5b8dcb6a93d98/FLAGb718d5405 [2021-10-13 07:19:41,172 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:19:41,172 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d211c834-5311-4089-852a-63aaae98c056/sv-benchmarks/c/pthread-wmm/safe019_pso.opt.i [2021-10-13 07:19:41,197 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d211c834-5311-4089-852a-63aaae98c056/bin/utaipan-q2qaUkNPG8/data/5c42bc206/9c1e2434c5dc45228db5b8dcb6a93d98/FLAGb718d5405 [2021-10-13 07:19:41,449 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d211c834-5311-4089-852a-63aaae98c056/bin/utaipan-q2qaUkNPG8/data/5c42bc206/9c1e2434c5dc45228db5b8dcb6a93d98 [2021-10-13 07:19:41,452 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:19:41,453 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:19:41,455 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:19:41,456 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:19:41,460 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:19:41,460 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:19:41" (1/1) ... [2021-10-13 07:19:41,462 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@695d7b58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:41, skipping insertion in model container [2021-10-13 07:19:41,462 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:19:41" (1/1) ... [2021-10-13 07:19:41,470 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:19:41,511 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:19:41,734 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_d211c834-5311-4089-852a-63aaae98c056/sv-benchmarks/c/pthread-wmm/safe019_pso.opt.i[949,962] [2021-10-13 07:19:41,902 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:19:41,911 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:19:41,923 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_d211c834-5311-4089-852a-63aaae98c056/sv-benchmarks/c/pthread-wmm/safe019_pso.opt.i[949,962] [2021-10-13 07:19:41,954 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:19:41,993 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:19:41,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:41 WrapperNode [2021-10-13 07:19:41,994 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:19:41,995 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:19:41,995 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:19:41,995 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:19:42,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:41" (1/1) ... [2021-10-13 07:19:42,017 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:41" (1/1) ... [2021-10-13 07:19:42,039 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:19:42,040 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:19:42,040 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:19:42,040 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:19:42,048 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:41" (1/1) ... [2021-10-13 07:19:42,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:41" (1/1) ... [2021-10-13 07:19:42,052 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:41" (1/1) ... [2021-10-13 07:19:42,052 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:41" (1/1) ... [2021-10-13 07:19:42,058 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:41" (1/1) ... [2021-10-13 07:19:42,070 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:41" (1/1) ... [2021-10-13 07:19:42,072 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:41" (1/1) ... [2021-10-13 07:19:42,085 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:19:42,086 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:19:42,086 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:19:42,086 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:19:42,087 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:41" (1/1) ... [2021-10-13 07:19:42,102 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:19:42,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d211c834-5311-4089-852a-63aaae98c056/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:19:42,135 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d211c834-5311-4089-852a-63aaae98c056/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:19:42,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d211c834-5311-4089-852a-63aaae98c056/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:19:42,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 07:19:42,182 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-13 07:19:42,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:19:42,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:19:42,183 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2021-10-13 07:19:42,183 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2021-10-13 07:19:42,183 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2021-10-13 07:19:42,183 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2021-10-13 07:19:42,183 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2021-10-13 07:19:42,184 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2021-10-13 07:19:42,184 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2021-10-13 07:19:42,184 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2021-10-13 07:19:42,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:19:42,184 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-13 07:19:42,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:19:42,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:19:42,186 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-13 07:19:42,513 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:19:42,516 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-13 07:19:42,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:19:42 BoogieIcfgContainer [2021-10-13 07:19:42,524 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:19:42,525 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:19:42,526 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:19:42,529 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:19:42,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:19:41" (1/3) ... [2021-10-13 07:19:42,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f7a1cff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:19:42, skipping insertion in model container [2021-10-13 07:19:42,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:41" (2/3) ... [2021-10-13 07:19:42,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f7a1cff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:19:42, skipping insertion in model container [2021-10-13 07:19:42,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:19:42" (3/3) ... [2021-10-13 07:19:42,535 INFO L111 eAbstractionObserver]: Analyzing ICFG safe019_pso.opt.i [2021-10-13 07:19:42,542 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-13 07:19:42,542 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:19:42,543 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:19:42,543 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-13 07:19:42,582 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork3_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,582 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork3_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,582 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,583 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,583 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork3_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,583 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork3_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,583 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,584 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,584 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,585 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,585 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,585 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,585 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,586 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,586 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,586 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,586 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,587 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,587 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,587 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,587 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,588 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,588 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,588 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,589 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,589 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,589 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,589 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,590 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,590 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,590 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,590 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,591 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,591 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,591 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,592 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,592 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,592 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,593 WARN L313 ript$VariableManager]: TermVariabe P3Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,593 WARN L313 ript$VariableManager]: TermVariabe P3Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,593 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,593 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,593 WARN L313 ript$VariableManager]: TermVariabe P3Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,594 WARN L313 ript$VariableManager]: TermVariabe P3Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,594 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,594 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,595 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,595 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,598 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,599 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,599 WARN L313 ript$VariableManager]: TermVariabe P3Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,599 WARN L313 ript$VariableManager]: TermVariabe P3Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,605 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,606 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,606 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,606 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,609 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,609 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,610 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,610 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,613 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,613 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,614 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,614 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 07:19:42,616 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-10-13 07:19:42,660 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:19:42,666 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, mConcurrency=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 [2021-10-13 07:19:42,667 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-10-13 07:19:42,681 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-13 07:19:42,692 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 98 transitions, 216 flow [2021-10-13 07:19:42,695 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 98 transitions, 216 flow [2021-10-13 07:19:42,697 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 109 places, 98 transitions, 216 flow [2021-10-13 07:19:42,812 INFO L129 PetriNetUnfolder]: 2/94 cut-off events. [2021-10-13 07:19:42,812 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-13 07:19:42,817 INFO L84 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 94 events. 2/94 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 51 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 78. Up to 2 conditions per place. [2021-10-13 07:19:42,823 INFO L116 LiptonReduction]: Number of co-enabled transitions 2114 [2021-10-13 07:19:46,177 INFO L131 LiptonReduction]: Checked pairs total: 3767 [2021-10-13 07:19:46,178 INFO L133 LiptonReduction]: Total number of compositions: 82 [2021-10-13 07:19:46,187 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 27 transitions, 74 flow [2021-10-13 07:19:46,293 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 706 states, 705 states have (on average 3.668085106382979) internal successors, (2586), 705 states have internal predecessors, (2586), 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) [2021-10-13 07:19:46,298 INFO L276 IsEmpty]: Start isEmpty. Operand has 706 states, 705 states have (on average 3.668085106382979) internal successors, (2586), 705 states have internal predecessors, (2586), 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) [2021-10-13 07:19:46,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 07:19:46,315 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:19:46,317 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:19:46,318 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-13 07:19:46,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:19:46,324 INFO L82 PathProgramCache]: Analyzing trace with hash -855573413, now seen corresponding path program 1 times [2021-10-13 07:19:46,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:19:46,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827360798] [2021-10-13 07:19:46,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:19:46,346 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:19:46,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:19:46,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:46,610 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:19:46,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827360798] [2021-10-13 07:19:46,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827360798] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:19:46,612 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:19:46,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:19:46,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904424803] [2021-10-13 07:19:46,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 07:19:46,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:19:46,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 07:19:46,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:19:46,644 INFO L87 Difference]: Start difference. First operand has 706 states, 705 states have (on average 3.668085106382979) internal successors, (2586), 705 states have internal predecessors, (2586), 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 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2021-10-13 07:19:46,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:19:46,698 INFO L93 Difference]: Finished difference Result 706 states and 2442 transitions. [2021-10-13 07:19:46,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 07:19:46,699 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 10 [2021-10-13 07:19:46,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:19:46,721 INFO L225 Difference]: With dead ends: 706 [2021-10-13 07:19:46,721 INFO L226 Difference]: Without dead ends: 706 [2021-10-13 07:19:46,722 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:19:46,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-10-13 07:19:46,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 706. [2021-10-13 07:19:46,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 3.4638297872340424) internal successors, (2442), 705 states have internal predecessors, (2442), 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) [2021-10-13 07:19:46,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 2442 transitions. [2021-10-13 07:19:46,837 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 2442 transitions. Word has length 10 [2021-10-13 07:19:46,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:19:46,838 INFO L470 AbstractCegarLoop]: Abstraction has 706 states and 2442 transitions. [2021-10-13 07:19:46,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2021-10-13 07:19:46,839 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 2442 transitions. [2021-10-13 07:19:46,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 07:19:46,842 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:19:46,842 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:19:46,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:19:46,843 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-13 07:19:46,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:19:46,844 INFO L82 PathProgramCache]: Analyzing trace with hash -752977543, now seen corresponding path program 1 times [2021-10-13 07:19:46,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:19:46,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928546286] [2021-10-13 07:19:46,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:19:46,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:19:46,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:19:47,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:47,120 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:19:47,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928546286] [2021-10-13 07:19:47,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928546286] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:19:47,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:19:47,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:19:47,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505162644] [2021-10-13 07:19:47,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:19:47,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:19:47,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:19:47,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:19:47,125 INFO L87 Difference]: Start difference. First operand 706 states and 2442 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2021-10-13 07:19:47,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:19:47,200 INFO L93 Difference]: Finished difference Result 1210 states and 3960 transitions. [2021-10-13 07:19:47,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:19:47,200 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 11 [2021-10-13 07:19:47,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:19:47,212 INFO L225 Difference]: With dead ends: 1210 [2021-10-13 07:19:47,212 INFO L226 Difference]: Without dead ends: 952 [2021-10-13 07:19:47,213 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:19:47,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2021-10-13 07:19:47,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 820. [2021-10-13 07:19:47,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 819 states have (on average 3.3675213675213675) internal successors, (2758), 819 states have internal predecessors, (2758), 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) [2021-10-13 07:19:47,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2758 transitions. [2021-10-13 07:19:47,272 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2758 transitions. Word has length 11 [2021-10-13 07:19:47,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:19:47,273 INFO L470 AbstractCegarLoop]: Abstraction has 820 states and 2758 transitions. [2021-10-13 07:19:47,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2021-10-13 07:19:47,273 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2758 transitions. [2021-10-13 07:19:47,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 07:19:47,281 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:19:47,282 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:19:47,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 07:19:47,282 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-13 07:19:47,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:19:47,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1046139535, now seen corresponding path program 1 times [2021-10-13 07:19:47,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:19:47,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266618891] [2021-10-13 07:19:47,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:19:47,285 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:19:47,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:19:47,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:47,413 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:19:47,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266618891] [2021-10-13 07:19:47,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266618891] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:19:47,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:19:47,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:19:47,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220717055] [2021-10-13 07:19:47,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:19:47,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:19:47,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:19:47,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:19:47,416 INFO L87 Difference]: Start difference. First operand 820 states and 2758 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-10-13 07:19:47,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:19:47,461 INFO L93 Difference]: Finished difference Result 901 states and 2929 transitions. [2021-10-13 07:19:47,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:19:47,462 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 12 [2021-10-13 07:19:47,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:19:47,470 INFO L225 Difference]: With dead ends: 901 [2021-10-13 07:19:47,470 INFO L226 Difference]: Without dead ends: 766 [2021-10-13 07:19:47,470 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:19:47,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-10-13 07:19:47,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 766. [2021-10-13 07:19:47,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 765 states have (on average 3.30718954248366) internal successors, (2530), 765 states have internal predecessors, (2530), 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) [2021-10-13 07:19:47,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 2530 transitions. [2021-10-13 07:19:47,510 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 2530 transitions. Word has length 12 [2021-10-13 07:19:47,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:19:47,510 INFO L470 AbstractCegarLoop]: Abstraction has 766 states and 2530 transitions. [2021-10-13 07:19:47,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-10-13 07:19:47,511 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 2530 transitions. [2021-10-13 07:19:47,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 07:19:47,514 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:19:47,514 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:19:47,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 07:19:47,518 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-13 07:19:47,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:19:47,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1868937433, now seen corresponding path program 1 times [2021-10-13 07:19:47,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:19:47,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894657009] [2021-10-13 07:19:47,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:19:47,522 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:19:47,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:19:47,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:47,638 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:19:47,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894657009] [2021-10-13 07:19:47,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894657009] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:19:47,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:19:47,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:19:47,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753297437] [2021-10-13 07:19:47,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:19:47,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:19:47,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:19:47,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:19:47,641 INFO L87 Difference]: Start difference. First operand 766 states and 2530 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2021-10-13 07:19:47,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:19:47,694 INFO L93 Difference]: Finished difference Result 922 states and 2910 transitions. [2021-10-13 07:19:47,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:19:47,694 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 12 [2021-10-13 07:19:47,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:19:47,702 INFO L225 Difference]: With dead ends: 922 [2021-10-13 07:19:47,702 INFO L226 Difference]: Without dead ends: 790 [2021-10-13 07:19:47,703 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:19:47,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2021-10-13 07:19:47,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 694. [2021-10-13 07:19:47,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 693 states have (on average 3.2698412698412698) internal successors, (2266), 693 states have internal predecessors, (2266), 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) [2021-10-13 07:19:47,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 2266 transitions. [2021-10-13 07:19:47,755 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 2266 transitions. Word has length 12 [2021-10-13 07:19:47,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:19:47,755 INFO L470 AbstractCegarLoop]: Abstraction has 694 states and 2266 transitions. [2021-10-13 07:19:47,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2021-10-13 07:19:47,756 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 2266 transitions. [2021-10-13 07:19:47,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 07:19:47,757 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:19:47,758 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:19:47,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 07:19:47,758 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-13 07:19:47,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:19:47,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1930882863, now seen corresponding path program 1 times [2021-10-13 07:19:47,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:19:47,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524848729] [2021-10-13 07:19:47,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:19:47,760 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:19:47,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:19:47,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:47,822 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:19:47,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524848729] [2021-10-13 07:19:47,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524848729] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:19:47,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:19:47,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:19:47,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280365797] [2021-10-13 07:19:47,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:19:47,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:19:47,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:19:47,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:19:47,825 INFO L87 Difference]: Start difference. First operand 694 states and 2266 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2021-10-13 07:19:47,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:19:47,864 INFO L93 Difference]: Finished difference Result 994 states and 3204 transitions. [2021-10-13 07:19:47,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:19:47,865 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 13 [2021-10-13 07:19:47,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:19:47,871 INFO L225 Difference]: With dead ends: 994 [2021-10-13 07:19:47,871 INFO L226 Difference]: Without dead ends: 526 [2021-10-13 07:19:47,871 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:19:47,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-10-13 07:19:47,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526. [2021-10-13 07:19:47,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 525 states have (on average 3.241904761904762) internal successors, (1702), 525 states have internal predecessors, (1702), 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) [2021-10-13 07:19:47,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 1702 transitions. [2021-10-13 07:19:47,899 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 1702 transitions. Word has length 13 [2021-10-13 07:19:47,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:19:47,900 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 1702 transitions. [2021-10-13 07:19:47,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2021-10-13 07:19:47,900 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 1702 transitions. [2021-10-13 07:19:47,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 07:19:47,901 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:19:47,902 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:19:47,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-13 07:19:47,902 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-13 07:19:47,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:19:47,903 INFO L82 PathProgramCache]: Analyzing trace with hash -2104491893, now seen corresponding path program 2 times [2021-10-13 07:19:47,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:19:47,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305548727] [2021-10-13 07:19:47,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:19:47,904 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:19:47,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:19:47,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:47,973 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:19:47,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305548727] [2021-10-13 07:19:47,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305548727] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:19:47,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:19:47,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:19:47,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495727553] [2021-10-13 07:19:47,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:19:47,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:19:47,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:19:47,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:19:47,975 INFO L87 Difference]: Start difference. First operand 526 states and 1702 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2021-10-13 07:19:48,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:19:48,020 INFO L93 Difference]: Finished difference Result 682 states and 2100 transitions. [2021-10-13 07:19:48,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:19:48,020 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 13 [2021-10-13 07:19:48,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:19:48,026 INFO L225 Difference]: With dead ends: 682 [2021-10-13 07:19:48,026 INFO L226 Difference]: Without dead ends: 586 [2021-10-13 07:19:48,027 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:19:48,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-10-13 07:19:48,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 490. [2021-10-13 07:19:48,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.198364008179959) internal successors, (1564), 489 states have internal predecessors, (1564), 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) [2021-10-13 07:19:48,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1564 transitions. [2021-10-13 07:19:48,049 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1564 transitions. Word has length 13 [2021-10-13 07:19:48,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:19:48,050 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 1564 transitions. [2021-10-13 07:19:48,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2021-10-13 07:19:48,050 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1564 transitions. [2021-10-13 07:19:48,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 07:19:48,051 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:19:48,052 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:19:48,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-13 07:19:48,052 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-13 07:19:48,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:19:48,053 INFO L82 PathProgramCache]: Analyzing trace with hash 131466755, now seen corresponding path program 1 times [2021-10-13 07:19:48,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:19:48,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112345794] [2021-10-13 07:19:48,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:19:48,053 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:19:48,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:19:48,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:48,097 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:19:48,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112345794] [2021-10-13 07:19:48,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112345794] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:19:48,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:19:48,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:19:48,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178981616] [2021-10-13 07:19:48,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:19:48,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:19:48,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:19:48,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:19:48,100 INFO L87 Difference]: Start difference. First operand 490 states and 1564 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-10-13 07:19:48,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:19:48,126 INFO L93 Difference]: Finished difference Result 712 states and 2183 transitions. [2021-10-13 07:19:48,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:19:48,126 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 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 14 [2021-10-13 07:19:48,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:19:48,131 INFO L225 Difference]: With dead ends: 712 [2021-10-13 07:19:48,131 INFO L226 Difference]: Without dead ends: 502 [2021-10-13 07:19:48,132 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:19:48,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-10-13 07:19:48,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 430. [2021-10-13 07:19:48,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 3.090909090909091) internal successors, (1326), 429 states have internal predecessors, (1326), 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) [2021-10-13 07:19:48,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1326 transitions. [2021-10-13 07:19:48,151 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1326 transitions. Word has length 14 [2021-10-13 07:19:48,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:19:48,151 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 1326 transitions. [2021-10-13 07:19:48,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-10-13 07:19:48,152 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1326 transitions. [2021-10-13 07:19:48,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 07:19:48,153 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:19:48,153 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:19:48,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-13 07:19:48,154 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-13 07:19:48,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:19:48,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1903921432, now seen corresponding path program 1 times [2021-10-13 07:19:48,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:19:48,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519637134] [2021-10-13 07:19:48,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:19:48,155 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:19:48,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:19:48,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:48,203 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:19:48,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519637134] [2021-10-13 07:19:48,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519637134] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:19:48,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:19:48,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:19:48,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757485961] [2021-10-13 07:19:48,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:19:48,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:19:48,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:19:48,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:19:48,206 INFO L87 Difference]: Start difference. First operand 430 states and 1326 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-10-13 07:19:48,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:19:48,244 INFO L93 Difference]: Finished difference Result 616 states and 1839 transitions. [2021-10-13 07:19:48,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:19:48,245 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 14 [2021-10-13 07:19:48,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:19:48,248 INFO L225 Difference]: With dead ends: 616 [2021-10-13 07:19:48,248 INFO L226 Difference]: Without dead ends: 310 [2021-10-13 07:19:48,249 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 20.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:19:48,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-10-13 07:19:48,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 310. [2021-10-13 07:19:48,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.896440129449838) internal successors, (895), 309 states have internal predecessors, (895), 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) [2021-10-13 07:19:48,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 895 transitions. [2021-10-13 07:19:48,261 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 895 transitions. Word has length 14 [2021-10-13 07:19:48,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:19:48,262 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 895 transitions. [2021-10-13 07:19:48,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-10-13 07:19:48,262 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 895 transitions. [2021-10-13 07:19:48,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 07:19:48,263 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:19:48,263 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:19:48,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-13 07:19:48,264 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-13 07:19:48,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:19:48,264 INFO L82 PathProgramCache]: Analyzing trace with hash 466133286, now seen corresponding path program 1 times [2021-10-13 07:19:48,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:19:48,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507958572] [2021-10-13 07:19:48,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:19:48,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:19:48,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:19:48,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:48,326 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:19:48,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507958572] [2021-10-13 07:19:48,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507958572] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:19:48,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:19:48,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:19:48,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334497816] [2021-10-13 07:19:48,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:19:48,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:19:48,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:19:48,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:19:48,328 INFO L87 Difference]: Start difference. First operand 310 states and 895 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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) [2021-10-13 07:19:48,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:19:48,357 INFO L93 Difference]: Finished difference Result 377 states and 1011 transitions. [2021-10-13 07:19:48,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:19:48,358 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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 15 [2021-10-13 07:19:48,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:19:48,361 INFO L225 Difference]: With dead ends: 377 [2021-10-13 07:19:48,361 INFO L226 Difference]: Without dead ends: 284 [2021-10-13 07:19:48,361 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:19:48,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-10-13 07:19:48,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 284. [2021-10-13 07:19:48,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.7385159010600706) internal successors, (775), 283 states have internal predecessors, (775), 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) [2021-10-13 07:19:48,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 775 transitions. [2021-10-13 07:19:48,373 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 775 transitions. Word has length 15 [2021-10-13 07:19:48,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:19:48,373 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 775 transitions. [2021-10-13 07:19:48,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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) [2021-10-13 07:19:48,374 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 775 transitions. [2021-10-13 07:19:48,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 07:19:48,375 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:19:48,375 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:19:48,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-13 07:19:48,375 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-13 07:19:48,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:19:48,376 INFO L82 PathProgramCache]: Analyzing trace with hash 2068885176, now seen corresponding path program 1 times [2021-10-13 07:19:48,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:19:48,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232975249] [2021-10-13 07:19:48,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:19:48,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:19:48,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:19:48,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:48,431 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:19:48,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232975249] [2021-10-13 07:19:48,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232975249] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:19:48,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:19:48,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 07:19:48,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387677860] [2021-10-13 07:19:48,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:19:48,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:19:48,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:19:48,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:19:48,433 INFO L87 Difference]: Start difference. First operand 284 states and 775 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2021-10-13 07:19:48,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:19:48,469 INFO L93 Difference]: Finished difference Result 298 states and 737 transitions. [2021-10-13 07:19:48,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:19:48,470 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 16 [2021-10-13 07:19:48,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:19:48,472 INFO L225 Difference]: With dead ends: 298 [2021-10-13 07:19:48,472 INFO L226 Difference]: Without dead ends: 223 [2021-10-13 07:19:48,472 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:19:48,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-10-13 07:19:48,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2021-10-13 07:19:48,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.4504504504504503) internal successors, (544), 222 states have internal predecessors, (544), 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) [2021-10-13 07:19:48,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 544 transitions. [2021-10-13 07:19:48,481 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 544 transitions. Word has length 16 [2021-10-13 07:19:48,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:19:48,481 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 544 transitions. [2021-10-13 07:19:48,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2021-10-13 07:19:48,482 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 544 transitions. [2021-10-13 07:19:48,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 07:19:48,483 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:19:48,483 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:19:48,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-13 07:19:48,484 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-13 07:19:48,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:19:48,484 INFO L82 PathProgramCache]: Analyzing trace with hash -289436797, now seen corresponding path program 1 times [2021-10-13 07:19:48,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:19:48,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487132867] [2021-10-13 07:19:48,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:19:48,485 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:19:48,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:19:48,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:48,541 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:19:48,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487132867] [2021-10-13 07:19:48,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487132867] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:19:48,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:19:48,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 07:19:48,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668627985] [2021-10-13 07:19:48,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:19:48,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:19:48,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:19:48,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:19:48,544 INFO L87 Difference]: Start difference. First operand 223 states and 544 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 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) [2021-10-13 07:19:48,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:19:48,587 INFO L93 Difference]: Finished difference Result 207 states and 474 transitions. [2021-10-13 07:19:48,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:19:48,588 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 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 17 [2021-10-13 07:19:48,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:19:48,590 INFO L225 Difference]: With dead ends: 207 [2021-10-13 07:19:48,590 INFO L226 Difference]: Without dead ends: 169 [2021-10-13 07:19:48,590 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:19:48,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-10-13 07:19:48,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2021-10-13 07:19:48,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.3095238095238093) internal successors, (388), 168 states have internal predecessors, (388), 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) [2021-10-13 07:19:48,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 388 transitions. [2021-10-13 07:19:48,597 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 388 transitions. Word has length 17 [2021-10-13 07:19:48,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:19:48,597 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 388 transitions. [2021-10-13 07:19:48,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 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) [2021-10-13 07:19:48,598 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 388 transitions. [2021-10-13 07:19:48,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 07:19:48,599 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:19:48,599 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:19:48,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-13 07:19:48,599 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-13 07:19:48,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:19:48,600 INFO L82 PathProgramCache]: Analyzing trace with hash -2098220685, now seen corresponding path program 1 times [2021-10-13 07:19:48,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:19:48,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285698258] [2021-10-13 07:19:48,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:19:48,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:19:48,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:19:48,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:48,668 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:19:48,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285698258] [2021-10-13 07:19:48,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285698258] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:19:48,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:19:48,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 07:19:48,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823889590] [2021-10-13 07:19:48,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:19:48,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:19:48,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:19:48,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:19:48,670 INFO L87 Difference]: Start difference. First operand 169 states and 388 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 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) [2021-10-13 07:19:48,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:19:48,699 INFO L93 Difference]: Finished difference Result 209 states and 466 transitions. [2021-10-13 07:19:48,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:19:48,700 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 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 19 [2021-10-13 07:19:48,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:19:48,701 INFO L225 Difference]: With dead ends: 209 [2021-10-13 07:19:48,701 INFO L226 Difference]: Without dead ends: 136 [2021-10-13 07:19:48,701 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:19:48,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-10-13 07:19:48,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2021-10-13 07:19:48,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.122137404580153) internal successors, (278), 131 states have internal predecessors, (278), 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) [2021-10-13 07:19:48,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 278 transitions. [2021-10-13 07:19:48,707 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 278 transitions. Word has length 19 [2021-10-13 07:19:48,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:19:48,707 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 278 transitions. [2021-10-13 07:19:48,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 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) [2021-10-13 07:19:48,708 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 278 transitions. [2021-10-13 07:19:48,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 07:19:48,708 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:19:48,708 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:19:48,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-13 07:19:48,709 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-13 07:19:48,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:19:48,709 INFO L82 PathProgramCache]: Analyzing trace with hash -142225233, now seen corresponding path program 2 times [2021-10-13 07:19:48,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:19:48,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377073480] [2021-10-13 07:19:48,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:19:48,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:19:48,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:19:48,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:48,773 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:19:48,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377073480] [2021-10-13 07:19:48,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377073480] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:19:48,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:19:48,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 07:19:48,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057346568] [2021-10-13 07:19:48,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 07:19:48,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:19:48,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 07:19:48,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:19:48,775 INFO L87 Difference]: Start difference. First operand 132 states and 278 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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) [2021-10-13 07:19:48,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:19:48,827 INFO L93 Difference]: Finished difference Result 121 states and 254 transitions. [2021-10-13 07:19:48,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 07:19:48,827 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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 19 [2021-10-13 07:19:48,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:19:48,828 INFO L225 Difference]: With dead ends: 121 [2021-10-13 07:19:48,829 INFO L226 Difference]: Without dead ends: 72 [2021-10-13 07:19:48,829 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:19:48,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-13 07:19:48,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-10-13 07:19:48,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.028169014084507) internal successors, (144), 71 states have internal predecessors, (144), 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) [2021-10-13 07:19:48,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 144 transitions. [2021-10-13 07:19:48,832 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 144 transitions. Word has length 19 [2021-10-13 07:19:48,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:19:48,833 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 144 transitions. [2021-10-13 07:19:48,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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) [2021-10-13 07:19:48,833 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 144 transitions. [2021-10-13 07:19:48,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 07:19:48,834 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:19:48,834 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:19:48,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-13 07:19:48,834 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-13 07:19:48,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:19:48,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1685666813, now seen corresponding path program 1 times [2021-10-13 07:19:48,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:19:48,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794852435] [2021-10-13 07:19:48,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:19:48,836 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:19:48,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:19:48,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:48,893 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:19:48,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794852435] [2021-10-13 07:19:48,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794852435] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:19:48,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:19:48,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 07:19:48,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597609905] [2021-10-13 07:19:48,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:19:48,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:19:48,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:19:48,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:19:48,896 INFO L87 Difference]: Start difference. First operand 72 states and 144 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 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) [2021-10-13 07:19:48,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:19:48,926 INFO L93 Difference]: Finished difference Result 71 states and 143 transitions. [2021-10-13 07:19:48,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:19:48,927 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 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 21 [2021-10-13 07:19:48,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:19:48,927 INFO L225 Difference]: With dead ends: 71 [2021-10-13 07:19:48,927 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 07:19:48,927 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:19:48,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 07:19:48,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 07:19:48,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-10-13 07:19:48,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 07:19:48,929 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2021-10-13 07:19:48,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:19:48,929 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 07:19:48,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 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) [2021-10-13 07:19:48,929 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 07:19:48,929 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 07:19:48,932 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:19:48,932 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-13 07:19:48,933 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-13 07:19:48,933 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-13 07:19:48,933 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3INUSE_VIOLATION [2021-10-13 07:19:48,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-13 07:19:48,937 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-13 07:19:48,938 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:19:48,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:19:48 BasicIcfg [2021-10-13 07:19:48,940 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:19:48,940 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:19:48,940 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:19:48,941 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:19:48,941 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:19:42" (3/4) ... [2021-10-13 07:19:48,944 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 07:19:48,950 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2021-10-13 07:19:48,951 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2021-10-13 07:19:48,951 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2021-10-13 07:19:48,951 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P3 [2021-10-13 07:19:48,956 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2021-10-13 07:19:48,956 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-13 07:19:48,956 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 07:19:48,957 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 07:19:48,988 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d211c834-5311-4089-852a-63aaae98c056/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:19:48,989 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:19:48,990 INFO L168 Benchmark]: Toolchain (without parser) took 7536.40 ms. Allocated memory was 104.9 MB in the beginning and 176.2 MB in the end (delta: 71.3 MB). Free memory was 60.6 MB in the beginning and 57.3 MB in the end (delta: 3.2 MB). Peak memory consumption was 73.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:19:48,991 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 104.9 MB. Free memory was 78.7 MB in the beginning and 78.7 MB in the end (delta: 62.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:19:48,991 INFO L168 Benchmark]: CACSL2BoogieTranslator took 538.77 ms. Allocated memory is still 104.9 MB. Free memory was 60.4 MB in the beginning and 69.9 MB in the end (delta: -9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:19:48,992 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.30 ms. Allocated memory is still 104.9 MB. Free memory was 69.9 MB in the beginning and 68.0 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:19:48,992 INFO L168 Benchmark]: Boogie Preprocessor took 45.20 ms. Allocated memory is still 104.9 MB. Free memory was 67.7 MB in the beginning and 66.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:19:48,992 INFO L168 Benchmark]: RCFGBuilder took 438.12 ms. Allocated memory is still 104.9 MB. Free memory was 66.3 MB in the beginning and 53.5 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:19:48,993 INFO L168 Benchmark]: TraceAbstraction took 6414.53 ms. Allocated memory was 104.9 MB in the beginning and 176.2 MB in the end (delta: 71.3 MB). Free memory was 53.1 MB in the beginning and 60.5 MB in the end (delta: -7.4 MB). Peak memory consumption was 65.2 MB. Max. memory is 16.1 GB. [2021-10-13 07:19:48,993 INFO L168 Benchmark]: Witness Printer took 48.63 ms. Allocated memory is still 176.2 MB. Free memory was 60.5 MB in the beginning and 57.3 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:19:48,995 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 104.9 MB. Free memory was 78.7 MB in the beginning and 78.7 MB in the end (delta: 62.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 538.77 ms. Allocated memory is still 104.9 MB. Free memory was 60.4 MB in the beginning and 69.9 MB in the end (delta: -9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 44.30 ms. Allocated memory is still 104.9 MB. Free memory was 69.9 MB in the beginning and 68.0 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 45.20 ms. Allocated memory is still 104.9 MB. Free memory was 67.7 MB in the beginning and 66.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 438.12 ms. Allocated memory is still 104.9 MB. Free memory was 66.3 MB in the beginning and 53.5 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6414.53 ms. Allocated memory was 104.9 MB in the beginning and 176.2 MB in the end (delta: 71.3 MB). Free memory was 53.1 MB in the beginning and 60.5 MB in the end (delta: -7.4 MB). Peak memory consumption was 65.2 MB. Max. memory is 16.1 GB. * Witness Printer took 48.63 ms. Allocated memory is still 176.2 MB. Free memory was 60.5 MB in the beginning and 57.3 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3482.7ms, 109 PlacesBefore, 39 PlacesAfterwards, 98 TransitionsBefore, 27 TransitionsAfterwards, 2114 CoEnabledTransitionPairs, 6 FixpointIterations, 20 TrivialSequentialCompositions, 53 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 1 ChoiceCompositions, 82 TotalNumberOfCompositions, 3767 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2379, positive: 2284, positive conditional: 0, positive unconditional: 2284, negative: 95, negative conditional: 0, negative unconditional: 95, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1544, positive: 1507, positive conditional: 0, positive unconditional: 1507, negative: 37, negative conditional: 0, negative unconditional: 37, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1544, positive: 1492, positive conditional: 0, positive unconditional: 1492, negative: 52, negative conditional: 0, negative unconditional: 52, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 52, positive: 15, positive conditional: 0, positive unconditional: 15, negative: 37, negative conditional: 0, negative unconditional: 37, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 109, positive: 35, positive conditional: 0, positive unconditional: 35, negative: 74, negative conditional: 0, negative unconditional: 74, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2379, positive: 777, positive conditional: 0, positive unconditional: 777, negative: 58, negative conditional: 0, negative unconditional: 58, unknown: 1544, unknown conditional: 0, unknown unconditional: 1544] , Statistics on independence cache: Total cache size (in pairs): 113, Positive cache size: 98, Positive conditional cache size: 0, Positive unconditional cache size: 98, Negative cache size: 15, Negative conditional cache size: 0, Negative unconditional cache size: 15 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 127 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 6277.7ms, OverallIterations: 14, TraceHistogramMax: 1, EmptinessCheckTime: 46.3ms, AutomataDifference: 725.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 3626.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 378 SDtfs, 453 SDslu, 655 SDs, 0 SdLazy, 264 SolverSat, 60 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 214.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 71 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 245.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=820occurred in iteration=2, InterpolantAutomatonStates: 81, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 372.4ms AutomataMinimizationTime, 14 MinimizatonAttempts, 400 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 55.0ms SsaConstructionTime, 315.8ms SatisfiabilityAnalysisTime, 840.1ms InterpolantComputationTime, 206 NumberOfCodeBlocks, 206 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 192 ConstructedInterpolants, 0 QuantifiedInterpolants, 819 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-13 07:19:49,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d211c834-5311-4089-852a-63aaae98c056/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...