./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.10.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111b42c0-e958-4adf-85a1-82cb741aa0db/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111b42c0-e958-4adf-85a1-82cb741aa0db/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111b42c0-e958-4adf-85a1-82cb741aa0db/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111b42c0-e958-4adf-85a1-82cb741aa0db/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.10.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111b42c0-e958-4adf-85a1-82cb741aa0db/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111b42c0-e958-4adf-85a1-82cb741aa0db/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c68befe0cb772d649d152823cc17c89d77797d55cc04257d4beaaad2b518a7a0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:12:55,746 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:12:55,750 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:12:55,821 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:12:55,824 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:12:55,826 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:12:55,828 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:12:55,831 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:12:55,834 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:12:55,836 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:12:55,837 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:12:55,839 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:12:55,840 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:12:55,842 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:12:55,844 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:12:55,846 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:12:55,848 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:12:55,849 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:12:55,852 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:12:55,856 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:12:55,858 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:12:55,869 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:12:55,871 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:12:55,878 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:12:55,883 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:12:55,888 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:12:55,889 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:12:55,890 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:12:55,891 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:12:55,893 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:12:55,896 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:12:55,897 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:12:55,899 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:12:55,900 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:12:55,903 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:12:55,904 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:12:55,905 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:12:55,906 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:12:55,906 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:12:55,907 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:12:55,909 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:12:55,910 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111b42c0-e958-4adf-85a1-82cb741aa0db/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:12:55,973 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:12:55,974 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:12:55,975 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:12:55,976 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:12:55,976 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:12:55,976 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:12:55,977 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:12:55,977 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:12:55,977 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:12:55,978 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:12:55,979 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:12:55,980 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:12:55,980 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:12:55,980 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:12:55,981 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:12:55,982 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:12:55,982 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:12:55,982 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:12:55,983 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:12:55,983 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:12:55,983 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:12:55,984 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:12:55,984 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:12:55,984 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:12:55,984 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:12:55,985 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:12:55,985 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:12:55,985 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:12:55,986 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:12:55,986 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:12:55,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:12:55,987 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:12:55,987 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:12:55,988 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:12:55,988 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:12:55,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:12:55,989 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:12:55,989 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:12:55,989 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:12:55,990 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_111b42c0-e958-4adf-85a1-82cb741aa0db/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111b42c0-e958-4adf-85a1-82cb741aa0db/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c68befe0cb772d649d152823cc17c89d77797d55cc04257d4beaaad2b518a7a0 [2021-11-07 01:12:56,308 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:12:56,355 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:12:56,358 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:12:56,360 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:12:56,361 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:12:56,362 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111b42c0-e958-4adf-85a1-82cb741aa0db/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/systemc/transmitter.10.cil.c [2021-11-07 01:12:56,440 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111b42c0-e958-4adf-85a1-82cb741aa0db/bin/utaipan-UUZaoUuFF8/data/36ea8229b/4fd9b5ad1625438fb87425e6668c1ce9/FLAG39b7984ed [2021-11-07 01:12:57,099 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:12:57,100 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111b42c0-e958-4adf-85a1-82cb741aa0db/sv-benchmarks/c/systemc/transmitter.10.cil.c [2021-11-07 01:12:57,124 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111b42c0-e958-4adf-85a1-82cb741aa0db/bin/utaipan-UUZaoUuFF8/data/36ea8229b/4fd9b5ad1625438fb87425e6668c1ce9/FLAG39b7984ed [2021-11-07 01:12:57,372 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111b42c0-e958-4adf-85a1-82cb741aa0db/bin/utaipan-UUZaoUuFF8/data/36ea8229b/4fd9b5ad1625438fb87425e6668c1ce9 [2021-11-07 01:12:57,375 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:12:57,377 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:12:57,385 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:12:57,385 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:12:57,389 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:12:57,389 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:12:57" (1/1) ... [2021-11-07 01:12:57,391 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cf45524 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:57, skipping insertion in model container [2021-11-07 01:12:57,391 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:12:57" (1/1) ... [2021-11-07 01:12:57,400 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:12:57,461 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:12:57,669 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_111b42c0-e958-4adf-85a1-82cb741aa0db/sv-benchmarks/c/systemc/transmitter.10.cil.c[706,719] [2021-11-07 01:12:57,856 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:12:57,881 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:12:57,905 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_111b42c0-e958-4adf-85a1-82cb741aa0db/sv-benchmarks/c/systemc/transmitter.10.cil.c[706,719] [2021-11-07 01:12:58,035 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:12:58,073 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:12:58,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:58 WrapperNode [2021-11-07 01:12:58,074 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:12:58,076 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:12:58,077 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:12:58,077 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:12:58,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:58" (1/1) ... [2021-11-07 01:12:58,120 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:58" (1/1) ... [2021-11-07 01:12:58,251 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:12:58,252 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:12:58,253 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:12:58,253 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:12:58,264 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:58" (1/1) ... [2021-11-07 01:12:58,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:58" (1/1) ... [2021-11-07 01:12:58,276 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:58" (1/1) ... [2021-11-07 01:12:58,277 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:58" (1/1) ... [2021-11-07 01:12:58,330 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:58" (1/1) ... [2021-11-07 01:12:58,389 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:58" (1/1) ... [2021-11-07 01:12:58,403 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:58" (1/1) ... [2021-11-07 01:12:58,424 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:12:58,426 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:12:58,428 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:12:58,429 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:12:58,430 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:58" (1/1) ... [2021-11-07 01:12:58,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:12:58,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111b42c0-e958-4adf-85a1-82cb741aa0db/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:12:58,476 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111b42c0-e958-4adf-85a1-82cb741aa0db/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:12:58,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111b42c0-e958-4adf-85a1-82cb741aa0db/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:12:58,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:12:58,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 01:12:58,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:12:58,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:13:04,968 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:13:04,969 INFO L299 CfgBuilder]: Removed 406 assume(true) statements. [2021-11-07 01:13:04,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:13:04 BoogieIcfgContainer [2021-11-07 01:13:04,974 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:13:04,977 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:13:04,977 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:13:04,981 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:13:04,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:12:57" (1/3) ... [2021-11-07 01:13:04,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29b164ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:13:04, skipping insertion in model container [2021-11-07 01:13:04,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:58" (2/3) ... [2021-11-07 01:13:04,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29b164ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:13:04, skipping insertion in model container [2021-11-07 01:13:04,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:13:04" (3/3) ... [2021-11-07 01:13:04,986 INFO L111 eAbstractionObserver]: Analyzing ICFG transmitter.10.cil.c [2021-11-07 01:13:04,993 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:13:04,993 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:13:05,060 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:13:05,068 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:13:05,069 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:13:05,106 INFO L276 IsEmpty]: Start isEmpty. Operand has 640 states, 638 states have (on average 1.5297805642633229) internal successors, (976), 639 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:05,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 01:13:05,120 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:05,121 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:13:05,121 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:13:05,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:05,128 INFO L85 PathProgramCache]: Analyzing trace with hash -935713658, now seen corresponding path program 1 times [2021-11-07 01:13:05,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:13:05,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508084989] [2021-11-07 01:13:05,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:05,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:13:05,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:05,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:13:05,481 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:13:05,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508084989] [2021-11-07 01:13:05,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508084989] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:13:05,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:13:05,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:13:05,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059017397] [2021-11-07 01:13:05,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:13:05,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:13:05,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:13:05,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:13:05,525 INFO L87 Difference]: Start difference. First operand has 640 states, 638 states have (on average 1.5297805642633229) internal successors, (976), 639 states have internal predecessors, (976), 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 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:06,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:06,012 INFO L93 Difference]: Finished difference Result 2383 states and 3621 transitions. [2021-11-07 01:13:06,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:13:06,014 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 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 52 [2021-11-07 01:13:06,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:06,057 INFO L225 Difference]: With dead ends: 2383 [2021-11-07 01:13:06,057 INFO L226 Difference]: Without dead ends: 1739 [2021-11-07 01:13:06,070 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:13:06,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1739 states. [2021-11-07 01:13:06,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1739 to 1651. [2021-11-07 01:13:06,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 1.4945454545454546) internal successors, (2466), 1650 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:06,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 2466 transitions. [2021-11-07 01:13:06,306 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 2466 transitions. Word has length 52 [2021-11-07 01:13:06,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:06,307 INFO L470 AbstractCegarLoop]: Abstraction has 1651 states and 2466 transitions. [2021-11-07 01:13:06,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:06,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 2466 transitions. [2021-11-07 01:13:06,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 01:13:06,311 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:06,312 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:13:06,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:13:06,312 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:13:06,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:06,313 INFO L85 PathProgramCache]: Analyzing trace with hash 497121061, now seen corresponding path program 1 times [2021-11-07 01:13:06,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:13:06,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739868933] [2021-11-07 01:13:06,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:06,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:13:06,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:06,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:13:06,433 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:13:06,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739868933] [2021-11-07 01:13:06,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739868933] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:13:06,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:13:06,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:13:06,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689672099] [2021-11-07 01:13:06,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:13:06,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:13:06,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:13:06,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:13:06,440 INFO L87 Difference]: Start difference. First operand 1651 states and 2466 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:06,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:06,861 INFO L93 Difference]: Finished difference Result 6256 states and 9317 transitions. [2021-11-07 01:13:06,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:13:06,862 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 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 52 [2021-11-07 01:13:06,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:06,895 INFO L225 Difference]: With dead ends: 6256 [2021-11-07 01:13:06,895 INFO L226 Difference]: Without dead ends: 4617 [2021-11-07 01:13:06,900 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:13:06,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4617 states. [2021-11-07 01:13:07,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4617 to 4420. [2021-11-07 01:13:07,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4420 states, 4419 states have (on average 1.4709210228558498) internal successors, (6500), 4419 states have internal predecessors, (6500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:07,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4420 states to 4420 states and 6500 transitions. [2021-11-07 01:13:07,120 INFO L78 Accepts]: Start accepts. Automaton has 4420 states and 6500 transitions. Word has length 52 [2021-11-07 01:13:07,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:07,121 INFO L470 AbstractCegarLoop]: Abstraction has 4420 states and 6500 transitions. [2021-11-07 01:13:07,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:07,121 INFO L276 IsEmpty]: Start isEmpty. Operand 4420 states and 6500 transitions. [2021-11-07 01:13:07,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 01:13:07,132 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:07,132 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:13:07,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 01:13:07,133 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:13:07,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:07,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1658393340, now seen corresponding path program 1 times [2021-11-07 01:13:07,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:13:07,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507230043] [2021-11-07 01:13:07,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:07,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:13:07,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:07,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:13:07,280 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:13:07,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507230043] [2021-11-07 01:13:07,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507230043] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:13:07,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:13:07,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:13:07,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345358823] [2021-11-07 01:13:07,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:13:07,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:13:07,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:13:07,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:13:07,297 INFO L87 Difference]: Start difference. First operand 4420 states and 6500 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:08,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:08,049 INFO L93 Difference]: Finished difference Result 16852 states and 24712 transitions. [2021-11-07 01:13:08,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:13:08,050 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 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 52 [2021-11-07 01:13:08,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:08,136 INFO L225 Difference]: With dead ends: 16852 [2021-11-07 01:13:08,137 INFO L226 Difference]: Without dead ends: 12447 [2021-11-07 01:13:08,151 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:13:08,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12447 states. [2021-11-07 01:13:08,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12447 to 11985. [2021-11-07 01:13:08,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11985 states, 11984 states have (on average 1.4482643524699599) internal successors, (17356), 11984 states have internal predecessors, (17356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:08,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11985 states to 11985 states and 17356 transitions. [2021-11-07 01:13:08,814 INFO L78 Accepts]: Start accepts. Automaton has 11985 states and 17356 transitions. Word has length 52 [2021-11-07 01:13:08,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:08,816 INFO L470 AbstractCegarLoop]: Abstraction has 11985 states and 17356 transitions. [2021-11-07 01:13:08,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:08,816 INFO L276 IsEmpty]: Start isEmpty. Operand 11985 states and 17356 transitions. [2021-11-07 01:13:08,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 01:13:08,818 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:08,818 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:13:08,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 01:13:08,819 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:13:08,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:08,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1679645573, now seen corresponding path program 1 times [2021-11-07 01:13:08,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:13:08,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640415475] [2021-11-07 01:13:08,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:08,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:13:08,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:08,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:13:08,955 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:13:08,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640415475] [2021-11-07 01:13:08,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640415475] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:13:08,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:13:08,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 01:13:08,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655205011] [2021-11-07 01:13:08,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:13:08,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:13:08,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:13:08,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:13:08,959 INFO L87 Difference]: Start difference. First operand 11985 states and 17356 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:09,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:09,911 INFO L93 Difference]: Finished difference Result 34552 states and 49973 transitions. [2021-11-07 01:13:09,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:13:09,912 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 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 52 [2021-11-07 01:13:09,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:10,036 INFO L225 Difference]: With dead ends: 34552 [2021-11-07 01:13:10,036 INFO L226 Difference]: Without dead ends: 22589 [2021-11-07 01:13:10,065 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:13:10,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22589 states. [2021-11-07 01:13:10,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22589 to 22560. [2021-11-07 01:13:11,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22560 states, 22559 states have (on average 1.4346380601977038) internal successors, (32364), 22559 states have internal predecessors, (32364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:11,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22560 states to 22560 states and 32364 transitions. [2021-11-07 01:13:11,110 INFO L78 Accepts]: Start accepts. Automaton has 22560 states and 32364 transitions. Word has length 52 [2021-11-07 01:13:11,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:11,110 INFO L470 AbstractCegarLoop]: Abstraction has 22560 states and 32364 transitions. [2021-11-07 01:13:11,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:11,111 INFO L276 IsEmpty]: Start isEmpty. Operand 22560 states and 32364 transitions. [2021-11-07 01:13:11,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 01:13:11,115 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:11,115 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:13:11,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 01:13:11,116 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:13:11,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:11,116 INFO L85 PathProgramCache]: Analyzing trace with hash 103087814, now seen corresponding path program 1 times [2021-11-07 01:13:11,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:13:11,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374581030] [2021-11-07 01:13:11,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:11,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:13:11,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:11,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:13:11,227 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:13:11,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374581030] [2021-11-07 01:13:11,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374581030] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:13:11,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:13:11,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:13:11,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884707452] [2021-11-07 01:13:11,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:13:11,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:13:11,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:13:11,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:13:11,230 INFO L87 Difference]: Start difference. First operand 22560 states and 32364 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:13,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:13,278 INFO L93 Difference]: Finished difference Result 85278 states and 122008 transitions. [2021-11-07 01:13:13,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:13:13,278 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 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 52 [2021-11-07 01:13:13,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:13,505 INFO L225 Difference]: With dead ends: 85278 [2021-11-07 01:13:13,506 INFO L226 Difference]: Without dead ends: 62747 [2021-11-07 01:13:13,566 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:13:13,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62747 states. [2021-11-07 01:13:15,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62747 to 61235. [2021-11-07 01:13:15,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61235 states, 61234 states have (on average 1.4132181467812) internal successors, (86537), 61234 states have internal predecessors, (86537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:15,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61235 states to 61235 states and 86537 transitions. [2021-11-07 01:13:15,826 INFO L78 Accepts]: Start accepts. Automaton has 61235 states and 86537 transitions. Word has length 52 [2021-11-07 01:13:15,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:15,827 INFO L470 AbstractCegarLoop]: Abstraction has 61235 states and 86537 transitions. [2021-11-07 01:13:15,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:15,827 INFO L276 IsEmpty]: Start isEmpty. Operand 61235 states and 86537 transitions. [2021-11-07 01:13:15,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 01:13:15,830 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:15,830 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:13:15,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 01:13:15,831 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:13:15,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:15,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1569429817, now seen corresponding path program 1 times [2021-11-07 01:13:15,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:13:15,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887411366] [2021-11-07 01:13:15,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:15,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:13:15,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:15,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:13:15,899 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:13:15,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887411366] [2021-11-07 01:13:15,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887411366] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:13:15,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:13:15,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 01:13:15,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761171640] [2021-11-07 01:13:15,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:13:15,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:13:15,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:13:15,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:13:15,903 INFO L87 Difference]: Start difference. First operand 61235 states and 86537 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:18,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:18,957 INFO L93 Difference]: Finished difference Result 182326 states and 256912 transitions. [2021-11-07 01:13:18,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:13:18,958 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 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 52 [2021-11-07 01:13:18,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:19,245 INFO L225 Difference]: With dead ends: 182326 [2021-11-07 01:13:19,246 INFO L226 Difference]: Without dead ends: 121127 [2021-11-07 01:13:19,379 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:13:19,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121127 states. [2021-11-07 01:13:23,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121127 to 120965. [2021-11-07 01:13:23,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120965 states, 120964 states have (on average 1.3954068979200422) internal successors, (168794), 120964 states have internal predecessors, (168794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:23,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120965 states to 120965 states and 168794 transitions. [2021-11-07 01:13:23,864 INFO L78 Accepts]: Start accepts. Automaton has 120965 states and 168794 transitions. Word has length 52 [2021-11-07 01:13:23,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:23,865 INFO L470 AbstractCegarLoop]: Abstraction has 120965 states and 168794 transitions. [2021-11-07 01:13:23,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:23,866 INFO L276 IsEmpty]: Start isEmpty. Operand 120965 states and 168794 transitions. [2021-11-07 01:13:23,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:13:23,887 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:23,887 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:13:23,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 01:13:23,888 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:13:23,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:23,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1357999283, now seen corresponding path program 1 times [2021-11-07 01:13:23,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:13:23,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835250664] [2021-11-07 01:13:23,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:23,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:13:23,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:24,019 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 01:13:24,019 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:13:24,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835250664] [2021-11-07 01:13:24,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835250664] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:13:24,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:13:24,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:13:24,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109323266] [2021-11-07 01:13:24,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:13:24,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:13:24,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:13:24,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:13:24,023 INFO L87 Difference]: Start difference. First operand 120965 states and 168794 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:28,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:28,672 INFO L93 Difference]: Finished difference Result 292136 states and 409608 transitions. [2021-11-07 01:13:28,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:13:28,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 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 68 [2021-11-07 01:13:28,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:29,060 INFO L225 Difference]: With dead ends: 292136 [2021-11-07 01:13:29,060 INFO L226 Difference]: Without dead ends: 171209 [2021-11-07 01:13:29,213 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:13:29,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171209 states. [2021-11-07 01:13:34,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171209 to 146869. [2021-11-07 01:13:34,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146869 states, 146868 states have (on average 1.4012446550644115) internal successors, (205798), 146868 states have internal predecessors, (205798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:35,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146869 states to 146869 states and 205798 transitions. [2021-11-07 01:13:35,095 INFO L78 Accepts]: Start accepts. Automaton has 146869 states and 205798 transitions. Word has length 68 [2021-11-07 01:13:35,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:35,096 INFO L470 AbstractCegarLoop]: Abstraction has 146869 states and 205798 transitions. [2021-11-07 01:13:35,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:35,096 INFO L276 IsEmpty]: Start isEmpty. Operand 146869 states and 205798 transitions. [2021-11-07 01:13:35,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:13:35,115 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:35,115 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:13:35,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 01:13:35,116 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:13:35,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:35,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1900589283, now seen corresponding path program 1 times [2021-11-07 01:13:35,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:13:35,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297354467] [2021-11-07 01:13:35,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:35,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:13:35,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:35,204 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:13:35,205 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:13:35,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297354467] [2021-11-07 01:13:35,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297354467] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:13:35,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:13:35,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:13:35,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972657427] [2021-11-07 01:13:35,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:13:35,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:13:35,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:13:35,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:13:35,209 INFO L87 Difference]: Start difference. First operand 146869 states and 205798 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:43,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:43,782 INFO L93 Difference]: Finished difference Result 462855 states and 651865 transitions. [2021-11-07 01:13:43,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:13:43,783 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 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 70 [2021-11-07 01:13:43,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:44,801 INFO L225 Difference]: With dead ends: 462855 [2021-11-07 01:13:44,801 INFO L226 Difference]: Without dead ends: 316024 [2021-11-07 01:13:44,959 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:13:45,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316024 states. [2021-11-07 01:13:53,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316024 to 249825. [2021-11-07 01:13:53,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249825 states, 249824 states have (on average 1.4031878442423467) internal successors, (350550), 249824 states have internal predecessors, (350550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:54,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249825 states to 249825 states and 350550 transitions. [2021-11-07 01:13:54,844 INFO L78 Accepts]: Start accepts. Automaton has 249825 states and 350550 transitions. Word has length 70 [2021-11-07 01:13:54,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:54,845 INFO L470 AbstractCegarLoop]: Abstraction has 249825 states and 350550 transitions. [2021-11-07 01:13:54,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:54,846 INFO L276 IsEmpty]: Start isEmpty. Operand 249825 states and 350550 transitions. [2021-11-07 01:13:54,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:13:54,913 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:54,914 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:13:54,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 01:13:54,926 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:13:54,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:54,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1611117993, now seen corresponding path program 1 times [2021-11-07 01:13:54,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:13:54,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117213910] [2021-11-07 01:13:54,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:54,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:13:55,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:55,090 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 01:13:55,091 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:13:55,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117213910] [2021-11-07 01:13:55,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117213910] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:13:55,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:13:55,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:13:55,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405725713] [2021-11-07 01:13:55,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:13:55,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:13:55,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:13:55,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:13:55,102 INFO L87 Difference]: Start difference. First operand 249825 states and 350550 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 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)