./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4188f091-a94e-463d-badd-fe1440e0fbec/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4188f091-a94e-463d-badd-fe1440e0fbec/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4188f091-a94e-463d-badd-fe1440e0fbec/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4188f091-a94e-463d-badd-fe1440e0fbec/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4188f091-a94e-463d-badd-fe1440e0fbec/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4188f091-a94e-463d-badd-fe1440e0fbec/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ff8f3f7dc837fc67a7020fd9a9dd65135ef198f3603f2c180bcb5ad9943191ea --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:54:26,984 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:54:26,987 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:54:27,047 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:54:27,048 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:54:27,049 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:54:27,051 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:54:27,053 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:54:27,056 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:54:27,057 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:54:27,058 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:54:27,060 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:54:27,060 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:54:27,061 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:54:27,063 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:54:27,065 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:54:27,066 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:54:27,067 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:54:27,069 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:54:27,072 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:54:27,074 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:54:27,077 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:54:27,078 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:54:27,079 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:54:27,084 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:54:27,084 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:54:27,085 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:54:27,086 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:54:27,087 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:54:27,088 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:54:27,089 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:54:27,090 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:54:27,091 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:54:27,092 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:54:27,093 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:54:27,094 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:54:27,095 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:54:27,095 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:54:27,095 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:54:27,097 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:54:27,098 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:54:27,099 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4188f091-a94e-463d-badd-fe1440e0fbec/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:54:27,135 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:54:27,137 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:54:27,139 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:54:27,139 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:54:27,139 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:54:27,140 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:54:27,140 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:54:27,140 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:54:27,140 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:54:27,141 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:54:27,142 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:54:27,142 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:54:27,142 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:54:27,143 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:54:27,143 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:54:27,143 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:54:27,144 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:54:27,144 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:54:27,145 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:54:27,145 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:54:27,145 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:54:27,145 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:54:27,146 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:54:27,146 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:54:27,146 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:54:27,146 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:54:27,146 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:54:27,147 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:54:27,147 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:54:27,149 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:54:27,149 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:54:27,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:54:27,150 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:54:27,150 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:54:27,151 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:54:27,151 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:54:27,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:54:27,151 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:54:27,152 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:54:27,152 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:54:27,152 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_4188f091-a94e-463d-badd-fe1440e0fbec/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4188f091-a94e-463d-badd-fe1440e0fbec/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff8f3f7dc837fc67a7020fd9a9dd65135ef198f3603f2c180bcb5ad9943191ea [2021-11-12 22:54:27,422 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:54:27,465 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:54:27,468 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:54:27,470 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:54:27,470 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:54:27,472 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4188f091-a94e-463d-badd-fe1440e0fbec/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-12 22:54:27,575 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4188f091-a94e-463d-badd-fe1440e0fbec/bin/utaipan-vmNK8stdcF/data/2779da422/3f9c084b1c104b0ea4c67504ebef242c/FLAG01946f9e4 [2021-11-12 22:54:28,158 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:54:28,159 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4188f091-a94e-463d-badd-fe1440e0fbec/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-12 22:54:28,180 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4188f091-a94e-463d-badd-fe1440e0fbec/bin/utaipan-vmNK8stdcF/data/2779da422/3f9c084b1c104b0ea4c67504ebef242c/FLAG01946f9e4 [2021-11-12 22:54:28,451 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4188f091-a94e-463d-badd-fe1440e0fbec/bin/utaipan-vmNK8stdcF/data/2779da422/3f9c084b1c104b0ea4c67504ebef242c [2021-11-12 22:54:28,454 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:54:28,455 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:54:28,457 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:54:28,457 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:54:28,461 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:54:28,461 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:54:28" (1/1) ... [2021-11-12 22:54:28,463 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e121dfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:28, skipping insertion in model container [2021-11-12 22:54:28,463 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:54:28" (1/1) ... [2021-11-12 22:54:28,470 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:54:28,522 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:54:28,819 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_4188f091-a94e-463d-badd-fe1440e0fbec/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[8460,8473] [2021-11-12 22:54:28,912 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:54:28,926 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:54:29,010 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_4188f091-a94e-463d-badd-fe1440e0fbec/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[8460,8473] [2021-11-12 22:54:29,059 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:54:29,079 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:54:29,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:29 WrapperNode [2021-11-12 22:54:29,080 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:54:29,081 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:54:29,081 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:54:29,081 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:54:29,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:29" (1/1) ... [2021-11-12 22:54:29,108 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:29" (1/1) ... [2021-11-12 22:54:29,177 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:54:29,178 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:54:29,178 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:54:29,179 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:54:29,188 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:29" (1/1) ... [2021-11-12 22:54:29,188 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:29" (1/1) ... [2021-11-12 22:54:29,194 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:29" (1/1) ... [2021-11-12 22:54:29,195 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:29" (1/1) ... [2021-11-12 22:54:29,209 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:29" (1/1) ... [2021-11-12 22:54:29,218 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:29" (1/1) ... [2021-11-12 22:54:29,222 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:29" (1/1) ... [2021-11-12 22:54:29,229 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:54:29,230 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:54:29,230 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:54:29,230 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:54:29,231 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:29" (1/1) ... [2021-11-12 22:54:29,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:54:29,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4188f091-a94e-463d-badd-fe1440e0fbec/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:54:29,276 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4188f091-a94e-463d-badd-fe1440e0fbec/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:54:29,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4188f091-a94e-463d-badd-fe1440e0fbec/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:54:29,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 22:54:29,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:54:29,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:54:29,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:54:30,575 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:54:30,575 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 22:54:30,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:54:30 BoogieIcfgContainer [2021-11-12 22:54:30,578 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:54:30,582 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:54:30,582 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:54:30,586 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:54:30,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:54:28" (1/3) ... [2021-11-12 22:54:30,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@577d905b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:54:30, skipping insertion in model container [2021-11-12 22:54:30,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:29" (2/3) ... [2021-11-12 22:54:30,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@577d905b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:54:30, skipping insertion in model container [2021-11-12 22:54:30,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:54:30" (3/3) ... [2021-11-12 22:54:30,590 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-12 22:54:30,596 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:54:30,596 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:54:30,646 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:54:30,654 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 22:54:30,655 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:54:30,678 INFO L276 IsEmpty]: Start isEmpty. Operand has 162 states, 160 states have (on average 1.70625) internal successors, (273), 161 states have internal predecessors, (273), 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) [2021-11-12 22:54:30,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-12 22:54:30,700 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:30,701 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:30,702 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:30,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:30,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1610035945, now seen corresponding path program 1 times [2021-11-12 22:54:30,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:54:30,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049336902] [2021-11-12 22:54:30,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:30,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:54:31,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:31,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:54:31,332 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:54:31,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049336902] [2021-11-12 22:54:31,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049336902] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:31,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:31,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-12 22:54:31,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200046460] [2021-11-12 22:54:31,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:31,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:54:31,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:54:31,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:54:31,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:54:31,380 INFO L87 Difference]: Start difference. First operand has 162 states, 160 states have (on average 1.70625) internal successors, (273), 161 states have internal predecessors, (273), 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 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 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) [2021-11-12 22:54:31,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:31,853 INFO L93 Difference]: Finished difference Result 564 states and 904 transitions. [2021-11-12 22:54:31,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:54:31,856 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 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 67 [2021-11-12 22:54:31,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:31,881 INFO L225 Difference]: With dead ends: 564 [2021-11-12 22:54:31,881 INFO L226 Difference]: Without dead ends: 469 [2021-11-12 22:54:31,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:54:31,890 INFO L933 BasicCegarLoop]: 421 mSDtfsCounter, 702 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 217.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 1349 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.65ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 278.67ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:31,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [702 Valid, 1349 Invalid, 212 Unknown, 0 Unchecked, 20.65ms Time], IncrementalHoareTripleChecker [23 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 278.67ms Time] [2021-11-12 22:54:31,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-11-12 22:54:32,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 461. [2021-11-12 22:54:32,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 1.4152173913043478) internal successors, (651), 460 states have internal predecessors, (651), 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) [2021-11-12 22:54:32,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 651 transitions. [2021-11-12 22:54:32,008 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 651 transitions. Word has length 67 [2021-11-12 22:54:32,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:32,009 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 651 transitions. [2021-11-12 22:54:32,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 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) [2021-11-12 22:54:32,009 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 651 transitions. [2021-11-12 22:54:32,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-12 22:54:32,019 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:32,020 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:32,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 22:54:32,021 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:32,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:32,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1760526780, now seen corresponding path program 1 times [2021-11-12 22:54:32,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:54:32,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222471121] [2021-11-12 22:54:32,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:32,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:54:32,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:32,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:54:32,221 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:54:32,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222471121] [2021-11-12 22:54:32,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222471121] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:32,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:32,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:54:32,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549841711] [2021-11-12 22:54:32,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:32,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:54:32,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:54:32,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:54:32,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:54:32,227 INFO L87 Difference]: Start difference. First operand 461 states and 651 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2021-11-12 22:54:32,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:32,533 INFO L93 Difference]: Finished difference Result 1109 states and 1611 transitions. [2021-11-12 22:54:32,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:54:32,534 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 [2021-11-12 22:54:32,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:32,539 INFO L225 Difference]: With dead ends: 1109 [2021-11-12 22:54:32,539 INFO L226 Difference]: Without dead ends: 728 [2021-11-12 22:54:32,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:54:32,551 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 565 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 159.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.71ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 201.05ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:32,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 234 Invalid, 214 Unknown, 0 Unchecked, 3.71ms Time], IncrementalHoareTripleChecker [6 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 201.05ms Time] [2021-11-12 22:54:32,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-11-12 22:54:32,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 726. [2021-11-12 22:54:32,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 1.446896551724138) internal successors, (1049), 725 states have internal predecessors, (1049), 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) [2021-11-12 22:54:32,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 1049 transitions. [2021-11-12 22:54:32,629 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 1049 transitions. Word has length 68 [2021-11-12 22:54:32,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:32,630 INFO L470 AbstractCegarLoop]: Abstraction has 726 states and 1049 transitions. [2021-11-12 22:54:32,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2021-11-12 22:54:32,632 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 1049 transitions. [2021-11-12 22:54:32,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-12 22:54:32,638 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:32,639 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:32,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-12 22:54:32,639 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:32,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:32,641 INFO L85 PathProgramCache]: Analyzing trace with hash 2037546003, now seen corresponding path program 1 times [2021-11-12 22:54:32,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:54:32,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288711052] [2021-11-12 22:54:32,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:32,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:54:32,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:32,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:54:32,841 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:54:32,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288711052] [2021-11-12 22:54:32,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288711052] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:32,842 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:32,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:54:32,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109078299] [2021-11-12 22:54:32,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:32,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:54:32,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:54:32,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:54:32,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:54:32,845 INFO L87 Difference]: Start difference. First operand 726 states and 1049 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2021-11-12 22:54:33,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:33,189 INFO L93 Difference]: Finished difference Result 1874 states and 2770 transitions. [2021-11-12 22:54:33,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:54:33,190 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 [2021-11-12 22:54:33,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:33,199 INFO L225 Difference]: With dead ends: 1874 [2021-11-12 22:54:33,199 INFO L226 Difference]: Without dead ends: 1258 [2021-11-12 22:54:33,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:54:33,209 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 548 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 150.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.61ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 192.95ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:33,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [548 Valid, 242 Invalid, 211 Unknown, 0 Unchecked, 3.61ms Time], IncrementalHoareTripleChecker [6 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 192.95ms Time] [2021-11-12 22:54:33,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2021-11-12 22:54:33,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 1256. [2021-11-12 22:54:33,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1256 states, 1255 states have (on average 1.4685258964143426) internal successors, (1843), 1255 states have internal predecessors, (1843), 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) [2021-11-12 22:54:33,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 1843 transitions. [2021-11-12 22:54:33,335 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 1843 transitions. Word has length 68 [2021-11-12 22:54:33,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:33,337 INFO L470 AbstractCegarLoop]: Abstraction has 1256 states and 1843 transitions. [2021-11-12 22:54:33,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2021-11-12 22:54:33,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 1843 transitions. [2021-11-12 22:54:33,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-12 22:54:33,340 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:33,341 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:33,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-12 22:54:33,341 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:33,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:33,342 INFO L85 PathProgramCache]: Analyzing trace with hash -351900638, now seen corresponding path program 1 times [2021-11-12 22:54:33,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:54:33,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612188857] [2021-11-12 22:54:33,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:33,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:54:33,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:33,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:54:33,473 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:54:33,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612188857] [2021-11-12 22:54:33,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612188857] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:33,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:33,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:54:33,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758826915] [2021-11-12 22:54:33,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:33,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:54:33,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:54:33,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:54:33,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:54:33,476 INFO L87 Difference]: Start difference. First operand 1256 states and 1843 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2021-11-12 22:54:33,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:33,900 INFO L93 Difference]: Finished difference Result 3430 states and 5115 transitions. [2021-11-12 22:54:33,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:54:33,900 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 [2021-11-12 22:54:33,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:33,917 INFO L225 Difference]: With dead ends: 3430 [2021-11-12 22:54:33,917 INFO L226 Difference]: Without dead ends: 2318 [2021-11-12 22:54:33,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:54:33,927 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 566 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 133.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.42ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 167.26ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:33,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [566 Valid, 243 Invalid, 197 Unknown, 0 Unchecked, 3.42ms Time], IncrementalHoareTripleChecker [6 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 167.26ms Time] [2021-11-12 22:54:33,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2318 states. [2021-11-12 22:54:34,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2318 to 2316. [2021-11-12 22:54:34,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2316 states, 2315 states have (on average 1.4807775377969763) internal successors, (3428), 2315 states have internal predecessors, (3428), 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) [2021-11-12 22:54:34,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2316 states to 2316 states and 3428 transitions. [2021-11-12 22:54:34,156 INFO L78 Accepts]: Start accepts. Automaton has 2316 states and 3428 transitions. Word has length 68 [2021-11-12 22:54:34,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:34,156 INFO L470 AbstractCegarLoop]: Abstraction has 2316 states and 3428 transitions. [2021-11-12 22:54:34,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2021-11-12 22:54:34,157 INFO L276 IsEmpty]: Start isEmpty. Operand 2316 states and 3428 transitions. [2021-11-12 22:54:34,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-12 22:54:34,158 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:34,158 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:34,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-12 22:54:34,158 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:34,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:34,159 INFO L85 PathProgramCache]: Analyzing trace with hash 414577333, now seen corresponding path program 1 times [2021-11-12 22:54:34,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:54:34,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837016998] [2021-11-12 22:54:34,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:34,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:54:34,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:34,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:54:34,266 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:54:34,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837016998] [2021-11-12 22:54:34,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837016998] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:34,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:34,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:54:34,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137000264] [2021-11-12 22:54:34,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:34,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:54:34,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:54:34,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:54:34,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:54:34,269 INFO L87 Difference]: Start difference. First operand 2316 states and 3428 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2021-11-12 22:54:34,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:34,921 INFO L93 Difference]: Finished difference Result 6697 states and 9989 transitions. [2021-11-12 22:54:34,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:54:34,921 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 [2021-11-12 22:54:34,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:34,949 INFO L225 Difference]: With dead ends: 6697 [2021-11-12 22:54:34,950 INFO L226 Difference]: Without dead ends: 4438 [2021-11-12 22:54:34,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:54:34,956 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 558 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 147.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.56ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 182.44ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:34,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [558 Valid, 226 Invalid, 209 Unknown, 0 Unchecked, 3.56ms Time], IncrementalHoareTripleChecker [6 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 182.44ms Time] [2021-11-12 22:54:34,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4438 states. [2021-11-12 22:54:35,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4438 to 4436. [2021-11-12 22:54:35,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4436 states, 4435 states have (on average 1.4793686583990981) internal successors, (6561), 4435 states have internal predecessors, (6561), 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) [2021-11-12 22:54:35,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4436 states to 4436 states and 6561 transitions. [2021-11-12 22:54:35,420 INFO L78 Accepts]: Start accepts. Automaton has 4436 states and 6561 transitions. Word has length 68 [2021-11-12 22:54:35,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:35,421 INFO L470 AbstractCegarLoop]: Abstraction has 4436 states and 6561 transitions. [2021-11-12 22:54:35,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2021-11-12 22:54:35,421 INFO L276 IsEmpty]: Start isEmpty. Operand 4436 states and 6561 transitions. [2021-11-12 22:54:35,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-12 22:54:35,422 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:35,423 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:35,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-12 22:54:35,423 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:35,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:35,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1356310170, now seen corresponding path program 1 times [2021-11-12 22:54:35,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:54:35,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250167556] [2021-11-12 22:54:35,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:35,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:54:35,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:35,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:54:35,494 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:54:35,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250167556] [2021-11-12 22:54:35,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250167556] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:35,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:35,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:54:35,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007001346] [2021-11-12 22:54:35,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:35,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:54:35,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:54:35,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:54:35,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:54:35,497 INFO L87 Difference]: Start difference. First operand 4436 states and 6561 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2021-11-12 22:54:36,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:36,613 INFO L93 Difference]: Finished difference Result 12353 states and 18326 transitions. [2021-11-12 22:54:36,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:54:36,615 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 [2021-11-12 22:54:36,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:36,669 INFO L225 Difference]: With dead ends: 12353 [2021-11-12 22:54:36,669 INFO L226 Difference]: Without dead ends: 7958 [2021-11-12 22:54:36,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:54:36,678 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 563 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 265.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.26ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 368.81ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:36,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [563 Valid, 218 Invalid, 208 Unknown, 0 Unchecked, 4.26ms Time], IncrementalHoareTripleChecker [6 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 368.81ms Time] [2021-11-12 22:54:36,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7958 states. [2021-11-12 22:54:37,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7958 to 7956. [2021-11-12 22:54:37,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7956 states, 7955 states have (on average 1.4681332495285984) internal successors, (11679), 7955 states have internal predecessors, (11679), 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) [2021-11-12 22:54:37,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7956 states to 7956 states and 11679 transitions. [2021-11-12 22:54:37,493 INFO L78 Accepts]: Start accepts. Automaton has 7956 states and 11679 transitions. Word has length 68 [2021-11-12 22:54:37,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:37,495 INFO L470 AbstractCegarLoop]: Abstraction has 7956 states and 11679 transitions. [2021-11-12 22:54:37,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2021-11-12 22:54:37,495 INFO L276 IsEmpty]: Start isEmpty. Operand 7956 states and 11679 transitions. [2021-11-12 22:54:37,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-12 22:54:37,498 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:37,498 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:37,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-12 22:54:37,498 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:37,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:37,499 INFO L85 PathProgramCache]: Analyzing trace with hash -771034997, now seen corresponding path program 1 times [2021-11-12 22:54:37,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:54:37,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770139338] [2021-11-12 22:54:37,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:37,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:54:37,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:38,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:54:38,493 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:54:38,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770139338] [2021-11-12 22:54:38,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770139338] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:38,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:38,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-12 22:54:38,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5856000] [2021-11-12 22:54:38,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:38,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-12 22:54:38,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:54:38,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-12 22:54:38,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:54:38,495 INFO L87 Difference]: Start difference. First operand 7956 states and 11679 transitions. Second operand has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 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) [2021-11-12 22:54:41,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:41,497 INFO L93 Difference]: Finished difference Result 16652 states and 24367 transitions. [2021-11-12 22:54:41,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 22:54:41,498 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 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 69 [2021-11-12 22:54:41,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:41,568 INFO L225 Difference]: With dead ends: 16652 [2021-11-12 22:54:41,568 INFO L226 Difference]: Without dead ends: 12842 [2021-11-12 22:54:41,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2021-11-12 22:54:41,579 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 922 mSDsluCounter, 2552 mSDsCounter, 0 mSdLazyCounter, 1233 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1060.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 SdHoareTripleChecker+Valid, 2770 SdHoareTripleChecker+Invalid, 1266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.92ms SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1232.04ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:41,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [922 Valid, 2770 Invalid, 1266 Unknown, 0 Unchecked, 23.92ms Time], IncrementalHoareTripleChecker [33 Valid, 1233 Invalid, 0 Unknown, 0 Unchecked, 1232.04ms Time] [2021-11-12 22:54:41,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12842 states. [2021-11-12 22:54:42,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12842 to 10554. [2021-11-12 22:54:42,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10554 states, 10553 states have (on average 1.4589216336586752) internal successors, (15396), 10553 states have internal predecessors, (15396), 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) [2021-11-12 22:54:42,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10554 states to 10554 states and 15396 transitions. [2021-11-12 22:54:42,857 INFO L78 Accepts]: Start accepts. Automaton has 10554 states and 15396 transitions. Word has length 69 [2021-11-12 22:54:42,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:42,858 INFO L470 AbstractCegarLoop]: Abstraction has 10554 states and 15396 transitions. [2021-11-12 22:54:42,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 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) [2021-11-12 22:54:42,859 INFO L276 IsEmpty]: Start isEmpty. Operand 10554 states and 15396 transitions. [2021-11-12 22:54:42,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-12 22:54:42,861 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:42,861 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:42,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-12 22:54:42,861 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:42,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:42,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1845146731, now seen corresponding path program 1 times [2021-11-12 22:54:42,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:54:42,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429191433] [2021-11-12 22:54:42,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:42,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:54:42,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:44,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:54:44,155 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:54:44,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429191433] [2021-11-12 22:54:44,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429191433] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:44,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:44,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-12 22:54:44,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085130404] [2021-11-12 22:54:44,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:44,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-12 22:54:44,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:54:44,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-12 22:54:44,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-11-12 22:54:44,159 INFO L87 Difference]: Start difference. First operand 10554 states and 15396 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 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) [2021-11-12 22:54:48,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:48,166 INFO L93 Difference]: Finished difference Result 20249 states and 29447 transitions. [2021-11-12 22:54:48,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-12 22:54:48,167 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 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 69 [2021-11-12 22:54:48,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:48,220 INFO L225 Difference]: With dead ends: 20249 [2021-11-12 22:54:48,220 INFO L226 Difference]: Without dead ends: 18295 [2021-11-12 22:54:48,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=290, Invalid=1192, Unknown=0, NotChecked=0, Total=1482 [2021-11-12 22:54:48,230 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 1335 mSDsluCounter, 2485 mSDsCounter, 0 mSdLazyCounter, 3207 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1843.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1335 SdHoareTripleChecker+Valid, 2758 SdHoareTripleChecker+Invalid, 3235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.98ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 3207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2268.18ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:48,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1335 Valid, 2758 Invalid, 3235 Unknown, 0 Unchecked, 14.98ms Time], IncrementalHoareTripleChecker [28 Valid, 3207 Invalid, 0 Unknown, 0 Unchecked, 2268.18ms Time] [2021-11-12 22:54:48,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18295 states. [2021-11-12 22:54:49,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18295 to 13441. [2021-11-12 22:54:49,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13441 states, 13440 states have (on average 1.4553571428571428) internal successors, (19560), 13440 states have internal predecessors, (19560), 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) [2021-11-12 22:54:49,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13441 states to 13441 states and 19560 transitions. [2021-11-12 22:54:49,300 INFO L78 Accepts]: Start accepts. Automaton has 13441 states and 19560 transitions. Word has length 69 [2021-11-12 22:54:49,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:49,301 INFO L470 AbstractCegarLoop]: Abstraction has 13441 states and 19560 transitions. [2021-11-12 22:54:49,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 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) [2021-11-12 22:54:49,301 INFO L276 IsEmpty]: Start isEmpty. Operand 13441 states and 19560 transitions. [2021-11-12 22:54:49,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-12 22:54:49,302 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:49,302 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:49,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-12 22:54:49,303 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:49,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:49,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1916944309, now seen corresponding path program 1 times [2021-11-12 22:54:49,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:54:49,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035307035] [2021-11-12 22:54:49,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:49,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:54:49,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:49,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:54:49,901 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:54:49,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035307035] [2021-11-12 22:54:49,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035307035] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:49,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:49,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-12 22:54:49,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276543274] [2021-11-12 22:54:49,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:49,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-12 22:54:49,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:54:49,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-12 22:54:49,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-11-12 22:54:49,904 INFO L87 Difference]: Start difference. First operand 13441 states and 19560 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 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) [2021-11-12 22:54:51,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:51,980 INFO L93 Difference]: Finished difference Result 16588 states and 24072 transitions. [2021-11-12 22:54:51,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 22:54:51,981 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 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 69 [2021-11-12 22:54:51,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:52,030 INFO L225 Difference]: With dead ends: 16588 [2021-11-12 22:54:52,030 INFO L226 Difference]: Without dead ends: 16586 [2021-11-12 22:54:52,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2021-11-12 22:54:52,040 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 832 mSDsluCounter, 1887 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 577.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 2186 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.94ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 696.81ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:52,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [832 Valid, 2186 Invalid, 1007 Unknown, 0 Unchecked, 6.94ms Time], IncrementalHoareTripleChecker [16 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 696.81ms Time] [2021-11-12 22:54:52,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16586 states. [2021-11-12 22:54:53,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16586 to 13459. [2021-11-12 22:54:53,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13459 states, 13458 states have (on average 1.454896715708129) internal successors, (19580), 13458 states have internal predecessors, (19580), 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) [2021-11-12 22:54:53,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13459 states to 13459 states and 19580 transitions. [2021-11-12 22:54:53,186 INFO L78 Accepts]: Start accepts. Automaton has 13459 states and 19580 transitions. Word has length 69 [2021-11-12 22:54:53,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:53,187 INFO L470 AbstractCegarLoop]: Abstraction has 13459 states and 19580 transitions. [2021-11-12 22:54:53,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 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) [2021-11-12 22:54:53,187 INFO L276 IsEmpty]: Start isEmpty. Operand 13459 states and 19580 transitions. [2021-11-12 22:54:53,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-12 22:54:53,189 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:53,189 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:53,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-12 22:54:53,189 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:53,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:53,190 INFO L85 PathProgramCache]: Analyzing trace with hash -2111933269, now seen corresponding path program 1 times [2021-11-12 22:54:53,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:54:53,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514078578] [2021-11-12 22:54:53,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:53,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:54:53,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:53,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:54:53,797 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:54:53,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514078578] [2021-11-12 22:54:53,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514078578] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:53,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:53,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-12 22:54:53,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947902054] [2021-11-12 22:54:53,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:53,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-12 22:54:53,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:54:53,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-12 22:54:53,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-11-12 22:54:53,799 INFO L87 Difference]: Start difference. First operand 13459 states and 19580 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 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) [2021-11-12 22:54:56,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:56,096 INFO L93 Difference]: Finished difference Result 23461 states and 34193 transitions. [2021-11-12 22:54:56,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 22:54:56,097 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 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 69 [2021-11-12 22:54:56,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:56,143 INFO L225 Difference]: With dead ends: 23461 [2021-11-12 22:54:56,144 INFO L226 Difference]: Without dead ends: 23459 [2021-11-12 22:54:56,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2021-11-12 22:54:56,153 INFO L933 BasicCegarLoop]: 353 mSDtfsCounter, 874 mSDsluCounter, 1858 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 623.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 874 SdHoareTripleChecker+Valid, 2190 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.08ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 732.49ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:56,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [874 Valid, 2190 Invalid, 931 Unknown, 0 Unchecked, 7.08ms Time], IncrementalHoareTripleChecker [20 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 732.49ms Time] [2021-11-12 22:54:56,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23459 states. [2021-11-12 22:54:57,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23459 to 16877. [2021-11-12 22:54:57,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16877 states, 16876 states have (on average 1.4560914908746148) internal successors, (24573), 16876 states have internal predecessors, (24573), 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) [2021-11-12 22:54:57,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16877 states to 16877 states and 24573 transitions. [2021-11-12 22:54:57,494 INFO L78 Accepts]: Start accepts. Automaton has 16877 states and 24573 transitions. Word has length 69 [2021-11-12 22:54:57,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:57,494 INFO L470 AbstractCegarLoop]: Abstraction has 16877 states and 24573 transitions. [2021-11-12 22:54:57,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 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) [2021-11-12 22:54:57,495 INFO L276 IsEmpty]: Start isEmpty. Operand 16877 states and 24573 transitions. [2021-11-12 22:54:57,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-12 22:54:57,497 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:57,497 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:57,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-12 22:54:57,497 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:57,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:57,498 INFO L85 PathProgramCache]: Analyzing trace with hash 73744587, now seen corresponding path program 1 times [2021-11-12 22:54:57,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:54:57,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585023705] [2021-11-12 22:54:57,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:57,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:54:57,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:58,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:54:58,534 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:54:58,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585023705] [2021-11-12 22:54:58,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585023705] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:58,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:58,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-12 22:54:58,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246108370] [2021-11-12 22:54:58,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:58,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-12 22:54:58,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:54:58,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-12 22:54:58,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-12 22:54:58,536 INFO L87 Difference]: Start difference. First operand 16877 states and 24573 transitions. Second operand has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 states have internal predecessors, (69), 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) [2021-11-12 22:55:02,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:02,857 INFO L93 Difference]: Finished difference Result 31300 states and 45695 transitions. [2021-11-12 22:55:02,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-12 22:55:02,857 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 states have internal predecessors, (69), 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 69 [2021-11-12 22:55:02,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:02,924 INFO L225 Difference]: With dead ends: 31300 [2021-11-12 22:55:02,924 INFO L226 Difference]: Without dead ends: 29346 [2021-11-12 22:55:02,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=254, Invalid=1006, Unknown=0, NotChecked=0, Total=1260 [2021-11-12 22:55:02,939 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 1169 mSDsluCounter, 2049 mSDsCounter, 0 mSdLazyCounter, 2634 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1384.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1169 SdHoareTripleChecker+Valid, 2259 SdHoareTripleChecker+Invalid, 2657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.14ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1649.30ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:02,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1169 Valid, 2259 Invalid, 2657 Unknown, 0 Unchecked, 11.14ms Time], IncrementalHoareTripleChecker [23 Valid, 2634 Invalid, 0 Unknown, 0 Unchecked, 1649.30ms Time] [2021-11-12 22:55:02,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29346 states. [2021-11-12 22:55:04,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29346 to 18405. [2021-11-12 22:55:04,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18405 states, 18404 states have (on average 1.4572918930667247) internal successors, (26820), 18404 states have internal predecessors, (26820), 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) [2021-11-12 22:55:04,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18405 states to 18405 states and 26820 transitions. [2021-11-12 22:55:04,515 INFO L78 Accepts]: Start accepts. Automaton has 18405 states and 26820 transitions. Word has length 69 [2021-11-12 22:55:04,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:04,515 INFO L470 AbstractCegarLoop]: Abstraction has 18405 states and 26820 transitions. [2021-11-12 22:55:04,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 states have internal predecessors, (69), 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) [2021-11-12 22:55:04,516 INFO L276 IsEmpty]: Start isEmpty. Operand 18405 states and 26820 transitions. [2021-11-12 22:55:04,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-12 22:55:04,517 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:04,517 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:04,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-12 22:55:04,517 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:04,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:04,518 INFO L85 PathProgramCache]: Analyzing trace with hash 671206111, now seen corresponding path program 1 times [2021-11-12 22:55:04,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:55:04,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099791752] [2021-11-12 22:55:04,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:04,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:55:04,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:05,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:05,256 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:55:05,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099791752] [2021-11-12 22:55:05,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099791752] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:05,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:05,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-12 22:55:05,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163356566] [2021-11-12 22:55:05,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:05,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-12 22:55:05,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:55:05,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-12 22:55:05,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:55:05,259 INFO L87 Difference]: Start difference. First operand 18405 states and 26820 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 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) [2021-11-12 22:55:08,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:08,008 INFO L93 Difference]: Finished difference Result 26696 states and 38795 transitions. [2021-11-12 22:55:08,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 22:55:08,009 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 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 71 [2021-11-12 22:55:08,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:08,054 INFO L225 Difference]: With dead ends: 26696 [2021-11-12 22:55:08,055 INFO L226 Difference]: Without dead ends: 22726 [2021-11-12 22:55:08,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2021-11-12 22:55:08,067 INFO L933 BasicCegarLoop]: 345 mSDtfsCounter, 844 mSDsluCounter, 2570 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 702.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 2883 SdHoareTripleChecker+Invalid, 1189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.07ms SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 836.08ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:08,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [844 Valid, 2883 Invalid, 1189 Unknown, 0 Unchecked, 9.07ms Time], IncrementalHoareTripleChecker [21 Valid, 1168 Invalid, 0 Unknown, 0 Unchecked, 836.08ms Time] [2021-11-12 22:55:08,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22726 states. [2021-11-12 22:55:09,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22726 to 20200. [2021-11-12 22:55:09,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20200 states, 20199 states have (on average 1.4558641516906778) internal successors, (29407), 20199 states have internal predecessors, (29407), 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) [2021-11-12 22:55:09,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20200 states to 20200 states and 29407 transitions. [2021-11-12 22:55:09,612 INFO L78 Accepts]: Start accepts. Automaton has 20200 states and 29407 transitions. Word has length 71 [2021-11-12 22:55:09,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:09,613 INFO L470 AbstractCegarLoop]: Abstraction has 20200 states and 29407 transitions. [2021-11-12 22:55:09,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 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) [2021-11-12 22:55:09,613 INFO L276 IsEmpty]: Start isEmpty. Operand 20200 states and 29407 transitions. [2021-11-12 22:55:09,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-12 22:55:09,614 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:09,615 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:09,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-12 22:55:09,615 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:09,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:09,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1204082367, now seen corresponding path program 1 times [2021-11-12 22:55:09,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:55:09,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026373454] [2021-11-12 22:55:09,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:09,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:55:09,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:10,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:10,648 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:55:10,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026373454] [2021-11-12 22:55:10,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026373454] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:10,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:10,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-12 22:55:10,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617940648] [2021-11-12 22:55:10,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:10,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-12 22:55:10,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:55:10,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-12 22:55:10,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-11-12 22:55:10,650 INFO L87 Difference]: Start difference. First operand 20200 states and 29407 transitions. Second operand has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 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) [2021-11-12 22:55:14,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:14,513 INFO L93 Difference]: Finished difference Result 25322 states and 36745 transitions. [2021-11-12 22:55:14,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-12 22:55:14,516 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 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 71 [2021-11-12 22:55:14,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:14,576 INFO L225 Difference]: With dead ends: 25322 [2021-11-12 22:55:14,576 INFO L226 Difference]: Without dead ends: 25320 [2021-11-12 22:55:14,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-11-12 22:55:14,591 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 1225 mSDsluCounter, 1847 mSDsCounter, 0 mSdLazyCounter, 2303 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1275.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1225 SdHoareTripleChecker+Valid, 2042 SdHoareTripleChecker+Invalid, 2333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.56ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1520.39ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:14,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1225 Valid, 2042 Invalid, 2333 Unknown, 0 Unchecked, 11.56ms Time], IncrementalHoareTripleChecker [30 Valid, 2303 Invalid, 0 Unknown, 0 Unchecked, 1520.39ms Time] [2021-11-12 22:55:14,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25320 states. [2021-11-12 22:55:16,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25320 to 20200. [2021-11-12 22:55:16,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20200 states, 20199 states have (on average 1.4558641516906778) internal successors, (29407), 20199 states have internal predecessors, (29407), 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) [2021-11-12 22:55:16,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20200 states to 20200 states and 29407 transitions. [2021-11-12 22:55:16,685 INFO L78 Accepts]: Start accepts. Automaton has 20200 states and 29407 transitions. Word has length 71 [2021-11-12 22:55:16,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:16,686 INFO L470 AbstractCegarLoop]: Abstraction has 20200 states and 29407 transitions. [2021-11-12 22:55:16,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 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) [2021-11-12 22:55:16,686 INFO L276 IsEmpty]: Start isEmpty. Operand 20200 states and 29407 transitions. [2021-11-12 22:55:16,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-12 22:55:16,687 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:16,688 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:16,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-12 22:55:16,688 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:16,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:16,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1496112481, now seen corresponding path program 1 times [2021-11-12 22:55:16,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:55:16,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459018865] [2021-11-12 22:55:16,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:16,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:55:16,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:17,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:17,909 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:55:17,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459018865] [2021-11-12 22:55:17,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459018865] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:17,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:17,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-11-12 22:55:17,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104300202] [2021-11-12 22:55:17,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:17,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-12 22:55:17,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:55:17,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-12 22:55:17,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-11-12 22:55:17,911 INFO L87 Difference]: Start difference. First operand 20200 states and 29407 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 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) [2021-11-12 22:55:22,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:22,254 INFO L93 Difference]: Finished difference Result 25345 states and 36770 transitions. [2021-11-12 22:55:22,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-12 22:55:22,254 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 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 71 [2021-11-12 22:55:22,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:22,300 INFO L225 Difference]: With dead ends: 25345 [2021-11-12 22:55:22,300 INFO L226 Difference]: Without dead ends: 25343 [2021-11-12 22:55:22,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=331, Invalid=1391, Unknown=0, NotChecked=0, Total=1722 [2021-11-12 22:55:22,309 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 1469 mSDsluCounter, 1704 mSDsCounter, 0 mSdLazyCounter, 2443 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1369.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1469 SdHoareTripleChecker+Valid, 1942 SdHoareTripleChecker+Invalid, 2470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.38ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1612.33ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:22,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1469 Valid, 1942 Invalid, 2470 Unknown, 0 Unchecked, 12.38ms Time], IncrementalHoareTripleChecker [27 Valid, 2443 Invalid, 0 Unknown, 0 Unchecked, 1612.33ms Time] [2021-11-12 22:55:22,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25343 states. [2021-11-12 22:55:24,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25343 to 21204. [2021-11-12 22:55:24,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21204 states, 21203 states have (on average 1.4540395227090506) internal successors, (30830), 21203 states have internal predecessors, (30830), 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) [2021-11-12 22:55:24,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21204 states to 21204 states and 30830 transitions. [2021-11-12 22:55:24,203 INFO L78 Accepts]: Start accepts. Automaton has 21204 states and 30830 transitions. Word has length 71 [2021-11-12 22:55:24,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:24,203 INFO L470 AbstractCegarLoop]: Abstraction has 21204 states and 30830 transitions. [2021-11-12 22:55:24,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 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) [2021-11-12 22:55:24,204 INFO L276 IsEmpty]: Start isEmpty. Operand 21204 states and 30830 transitions. [2021-11-12 22:55:24,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-12 22:55:24,205 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:24,205 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:24,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-12 22:55:24,205 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:24,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:24,206 INFO L85 PathProgramCache]: Analyzing trace with hash -2058026209, now seen corresponding path program 1 times [2021-11-12 22:55:24,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:55:24,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795259819] [2021-11-12 22:55:24,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:24,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:55:24,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:25,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:25,140 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:55:25,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795259819] [2021-11-12 22:55:25,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795259819] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:25,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:25,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-12 22:55:25,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578664094] [2021-11-12 22:55:25,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:25,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-12 22:55:25,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:55:25,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-12 22:55:25,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-11-12 22:55:25,143 INFO L87 Difference]: Start difference. First operand 21204 states and 30830 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 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) [2021-11-12 22:55:28,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:28,238 INFO L93 Difference]: Finished difference Result 29957 states and 43584 transitions. [2021-11-12 22:55:28,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-12 22:55:28,239 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 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 71 [2021-11-12 22:55:28,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:28,276 INFO L225 Difference]: With dead ends: 29957 [2021-11-12 22:55:28,276 INFO L226 Difference]: Without dead ends: 26147 [2021-11-12 22:55:28,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2021-11-12 22:55:28,291 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 982 mSDsluCounter, 1394 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 586.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 982 SdHoareTripleChecker+Valid, 1636 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.69ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 689.11ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:28,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [982 Valid, 1636 Invalid, 886 Unknown, 0 Unchecked, 6.69ms Time], IncrementalHoareTripleChecker [29 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 689.11ms Time] [2021-11-12 22:55:28,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26147 states. [2021-11-12 22:55:29,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26147 to 21217. [2021-11-12 22:55:29,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21217 states, 21216 states have (on average 1.4539027149321266) internal successors, (30846), 21216 states have internal predecessors, (30846), 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) [2021-11-12 22:55:29,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21217 states to 21217 states and 30846 transitions. [2021-11-12 22:55:29,993 INFO L78 Accepts]: Start accepts. Automaton has 21217 states and 30846 transitions. Word has length 71 [2021-11-12 22:55:29,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:29,993 INFO L470 AbstractCegarLoop]: Abstraction has 21217 states and 30846 transitions. [2021-11-12 22:55:29,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 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) [2021-11-12 22:55:29,994 INFO L276 IsEmpty]: Start isEmpty. Operand 21217 states and 30846 transitions. [2021-11-12 22:55:29,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-12 22:55:29,995 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:29,996 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:29,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-12 22:55:29,996 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:29,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:29,997 INFO L85 PathProgramCache]: Analyzing trace with hash 558155519, now seen corresponding path program 1 times [2021-11-12 22:55:29,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:55:29,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975047793] [2021-11-12 22:55:29,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:29,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:55:30,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:31,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:31,108 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:55:31,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975047793] [2021-11-12 22:55:31,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975047793] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:31,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:31,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-11-12 22:55:31,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917973026] [2021-11-12 22:55:31,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:31,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-12 22:55:31,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:55:31,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-12 22:55:31,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-11-12 22:55:31,113 INFO L87 Difference]: Start difference. First operand 21217 states and 30846 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 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) [2021-11-12 22:55:35,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:35,488 INFO L93 Difference]: Finished difference Result 28839 states and 41845 transitions. [2021-11-12 22:55:35,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-12 22:55:35,489 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 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 71 [2021-11-12 22:55:35,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:35,532 INFO L225 Difference]: With dead ends: 28839 [2021-11-12 22:55:35,532 INFO L226 Difference]: Without dead ends: 26885 [2021-11-12 22:55:35,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=314, Invalid=1326, Unknown=0, NotChecked=0, Total=1640 [2021-11-12 22:55:35,544 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 1252 mSDsluCounter, 2197 mSDsCounter, 0 mSdLazyCounter, 3030 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1406.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1252 SdHoareTripleChecker+Valid, 2406 SdHoareTripleChecker+Invalid, 3053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.54ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 3030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1650.13ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:35,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1252 Valid, 2406 Invalid, 3053 Unknown, 0 Unchecked, 10.54ms Time], IncrementalHoareTripleChecker [23 Valid, 3030 Invalid, 0 Unknown, 0 Unchecked, 1650.13ms Time] [2021-11-12 22:55:35,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26885 states. [2021-11-12 22:55:37,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26885 to 21240. [2021-11-12 22:55:37,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21240 states, 21239 states have (on average 1.453646593530769) internal successors, (30874), 21239 states have internal predecessors, (30874), 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) [2021-11-12 22:55:37,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21240 states to 21240 states and 30874 transitions. [2021-11-12 22:55:37,430 INFO L78 Accepts]: Start accepts. Automaton has 21240 states and 30874 transitions. Word has length 71 [2021-11-12 22:55:37,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:37,430 INFO L470 AbstractCegarLoop]: Abstraction has 21240 states and 30874 transitions. [2021-11-12 22:55:37,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 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) [2021-11-12 22:55:37,431 INFO L276 IsEmpty]: Start isEmpty. Operand 21240 states and 30874 transitions. [2021-11-12 22:55:37,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-12 22:55:37,432 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:37,432 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:37,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-12 22:55:37,433 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:37,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:37,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1091031775, now seen corresponding path program 1 times [2021-11-12 22:55:37,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:55:37,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440527750] [2021-11-12 22:55:37,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:37,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:55:37,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:38,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:38,535 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:55:38,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440527750] [2021-11-12 22:55:38,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440527750] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:38,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:38,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-11-12 22:55:38,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072362776] [2021-11-12 22:55:38,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:38,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-12 22:55:38,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:55:38,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-12 22:55:38,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-11-12 22:55:38,537 INFO L87 Difference]: Start difference. First operand 21240 states and 30874 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 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) [2021-11-12 22:55:44,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:44,405 INFO L93 Difference]: Finished difference Result 37524 states and 54605 transitions. [2021-11-12 22:55:44,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-12 22:55:44,405 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 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 71 [2021-11-12 22:55:44,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:44,461 INFO L225 Difference]: With dead ends: 37524 [2021-11-12 22:55:44,461 INFO L226 Difference]: Without dead ends: 37522 [2021-11-12 22:55:44,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=300, Invalid=1340, Unknown=0, NotChecked=0, Total=1640 [2021-11-12 22:55:44,474 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 1183 mSDsluCounter, 2800 mSDsCounter, 0 mSdLazyCounter, 3786 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1712.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1183 SdHoareTripleChecker+Valid, 3028 SdHoareTripleChecker+Invalid, 3808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.61ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 3786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2012.45ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:44,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1183 Valid, 3028 Invalid, 3808 Unknown, 0 Unchecked, 13.61ms Time], IncrementalHoareTripleChecker [22 Valid, 3786 Invalid, 0 Unknown, 0 Unchecked, 2012.45ms Time] [2021-11-12 22:55:44,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37522 states. [2021-11-12 22:55:46,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37522 to 21243. [2021-11-12 22:55:46,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21243 states, 21242 states have (on average 1.4535825251859524) internal successors, (30877), 21242 states have internal predecessors, (30877), 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) [2021-11-12 22:55:46,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21243 states to 21243 states and 30877 transitions. [2021-11-12 22:55:46,565 INFO L78 Accepts]: Start accepts. Automaton has 21243 states and 30877 transitions. Word has length 71 [2021-11-12 22:55:46,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:46,565 INFO L470 AbstractCegarLoop]: Abstraction has 21243 states and 30877 transitions. [2021-11-12 22:55:46,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 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) [2021-11-12 22:55:46,566 INFO L276 IsEmpty]: Start isEmpty. Operand 21243 states and 30877 transitions. [2021-11-12 22:55:46,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-12 22:55:46,568 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:46,568 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:46,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-12 22:55:46,568 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:46,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:46,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1860614337, now seen corresponding path program 1 times [2021-11-12 22:55:46,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:55:46,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913298117] [2021-11-12 22:55:46,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:46,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:55:46,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:48,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:48,119 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:55:48,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913298117] [2021-11-12 22:55:48,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913298117] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:48,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:48,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-11-12 22:55:48,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585438702] [2021-11-12 22:55:48,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:48,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-12 22:55:48,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:55:48,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-12 22:55:48,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2021-11-12 22:55:48,121 INFO L87 Difference]: Start difference. First operand 21243 states and 30877 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 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) [2021-11-12 22:55:54,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:54,714 INFO L93 Difference]: Finished difference Result 29409 states and 42728 transitions. [2021-11-12 22:55:54,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-12 22:55:54,715 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 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 71 [2021-11-12 22:55:54,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:54,757 INFO L225 Difference]: With dead ends: 29409 [2021-11-12 22:55:54,757 INFO L226 Difference]: Without dead ends: 27423 [2021-11-12 22:55:54,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=474, Invalid=2076, Unknown=0, NotChecked=0, Total=2550 [2021-11-12 22:55:54,769 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 1664 mSDsluCounter, 3000 mSDsCounter, 0 mSdLazyCounter, 4828 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2382.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1664 SdHoareTripleChecker+Valid, 3227 SdHoareTripleChecker+Invalid, 4861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.72ms SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 4828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2801.38ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:54,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1664 Valid, 3227 Invalid, 4861 Unknown, 0 Unchecked, 16.72ms Time], IncrementalHoareTripleChecker [33 Valid, 4828 Invalid, 0 Unknown, 0 Unchecked, 2801.38ms Time] [2021-11-12 22:55:54,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27423 states. [2021-11-12 22:55:57,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27423 to 23026. [2021-11-12 22:55:57,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23026 states, 23025 states have (on average 1.4523344191096634) internal successors, (33440), 23025 states have internal predecessors, (33440), 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) [2021-11-12 22:55:57,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23026 states to 23026 states and 33440 transitions. [2021-11-12 22:55:57,088 INFO L78 Accepts]: Start accepts. Automaton has 23026 states and 33440 transitions. Word has length 71 [2021-11-12 22:55:57,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:57,088 INFO L470 AbstractCegarLoop]: Abstraction has 23026 states and 33440 transitions. [2021-11-12 22:55:57,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 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) [2021-11-12 22:55:57,089 INFO L276 IsEmpty]: Start isEmpty. Operand 23026 states and 33440 transitions. [2021-11-12 22:55:57,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-12 22:55:57,090 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:57,091 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:57,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-12 22:55:57,091 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:57,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:57,092 INFO L85 PathProgramCache]: Analyzing trace with hash 755567391, now seen corresponding path program 1 times [2021-11-12 22:55:57,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:55:57,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409037422] [2021-11-12 22:55:57,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:57,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:55:57,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:57,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:57,762 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:55:57,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409037422] [2021-11-12 22:55:57,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409037422] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:57,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:57,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-12 22:55:57,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665216022] [2021-11-12 22:55:57,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:57,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-12 22:55:57,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:55:57,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-12 22:55:57,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:55:57,763 INFO L87 Difference]: Start difference. First operand 23026 states and 33440 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 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) [2021-11-12 22:56:02,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:02,718 INFO L93 Difference]: Finished difference Result 44556 states and 64843 transitions. [2021-11-12 22:56:02,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 22:56:02,718 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 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 71 [2021-11-12 22:56:02,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:02,786 INFO L225 Difference]: With dead ends: 44556 [2021-11-12 22:56:02,786 INFO L226 Difference]: Without dead ends: 40586 [2021-11-12 22:56:02,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2021-11-12 22:56:02,802 INFO L933 BasicCegarLoop]: 341 mSDtfsCounter, 891 mSDsluCounter, 2432 mSDsCounter, 0 mSdLazyCounter, 1287 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 783.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 2747 SdHoareTripleChecker+Invalid, 1311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.38ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 922.20ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:02,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [891 Valid, 2747 Invalid, 1311 Unknown, 0 Unchecked, 9.38ms Time], IncrementalHoareTripleChecker [24 Valid, 1287 Invalid, 0 Unknown, 0 Unchecked, 922.20ms Time] [2021-11-12 22:56:02,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40586 states. [2021-11-12 22:56:05,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40586 to 24665. [2021-11-12 22:56:05,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24665 states, 24664 states have (on average 1.4505757379176127) internal successors, (35777), 24664 states have internal predecessors, (35777), 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) [2021-11-12 22:56:05,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24665 states to 24665 states and 35777 transitions. [2021-11-12 22:56:05,453 INFO L78 Accepts]: Start accepts. Automaton has 24665 states and 35777 transitions. Word has length 71 [2021-11-12 22:56:05,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:05,453 INFO L470 AbstractCegarLoop]: Abstraction has 24665 states and 35777 transitions. [2021-11-12 22:56:05,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 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) [2021-11-12 22:56:05,454 INFO L276 IsEmpty]: Start isEmpty. Operand 24665 states and 35777 transitions. [2021-11-12 22:56:05,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-12 22:56:05,456 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:05,456 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:05,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-12 22:56:05,456 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:05,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:05,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1288443647, now seen corresponding path program 1 times [2021-11-12 22:56:05,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:56:05,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164908499] [2021-11-12 22:56:05,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:05,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:56:05,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:07,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:56:07,005 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:56:07,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164908499] [2021-11-12 22:56:07,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164908499] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:07,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:07,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-11-12 22:56:07,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228273112] [2021-11-12 22:56:07,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:07,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-12 22:56:07,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:56:07,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-12 22:56:07,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-11-12 22:56:07,007 INFO L87 Difference]: Start difference. First operand 24665 states and 35777 transitions. Second operand has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 states have internal predecessors, (71), 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) [2021-11-12 22:56:13,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:13,045 INFO L93 Difference]: Finished difference Result 27851 states and 40330 transitions. [2021-11-12 22:56:13,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-12 22:56:13,046 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 states have internal predecessors, (71), 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 71 [2021-11-12 22:56:13,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:13,088 INFO L225 Difference]: With dead ends: 27851 [2021-11-12 22:56:13,088 INFO L226 Difference]: Without dead ends: 27849 [2021-11-12 22:56:13,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=338, Invalid=1384, Unknown=0, NotChecked=0, Total=1722 [2021-11-12 22:56:13,098 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 954 mSDsluCounter, 2171 mSDsCounter, 0 mSdLazyCounter, 3094 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1753.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 954 SdHoareTripleChecker+Valid, 2392 SdHoareTripleChecker+Invalid, 3113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.04ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 3094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2036.08ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:13,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [954 Valid, 2392 Invalid, 3113 Unknown, 0 Unchecked, 12.04ms Time], IncrementalHoareTripleChecker [19 Valid, 3094 Invalid, 0 Unknown, 0 Unchecked, 2036.08ms Time] [2021-11-12 22:56:13,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27849 states. [2021-11-12 22:56:15,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27849 to 24668. [2021-11-12 22:56:15,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24668 states, 24667 states have (on average 1.4505614788989338) internal successors, (35781), 24667 states have internal predecessors, (35781), 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) [2021-11-12 22:56:15,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24668 states to 24668 states and 35781 transitions. [2021-11-12 22:56:15,706 INFO L78 Accepts]: Start accepts. Automaton has 24668 states and 35781 transitions. Word has length 71 [2021-11-12 22:56:15,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:15,706 INFO L470 AbstractCegarLoop]: Abstraction has 24668 states and 35781 transitions. [2021-11-12 22:56:15,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 states have internal predecessors, (71), 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) [2021-11-12 22:56:15,706 INFO L276 IsEmpty]: Start isEmpty. Operand 24668 states and 35781 transitions. [2021-11-12 22:56:15,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-12 22:56:15,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:15,708 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:15,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-12 22:56:15,709 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:15,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:15,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1093454687, now seen corresponding path program 1 times [2021-11-12 22:56:15,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:56:15,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960261166] [2021-11-12 22:56:15,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:15,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:56:15,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:16,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:56:16,431 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:56:16,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960261166] [2021-11-12 22:56:16,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960261166] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:16,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:16,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-12 22:56:16,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812791164] [2021-11-12 22:56:16,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:16,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-12 22:56:16,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:56:16,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-12 22:56:16,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-11-12 22:56:16,433 INFO L87 Difference]: Start difference. First operand 24668 states and 35781 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 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) [2021-11-12 22:56:21,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:21,267 INFO L93 Difference]: Finished difference Result 41984 states and 60980 transitions. [2021-11-12 22:56:21,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-12 22:56:21,267 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 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 71 [2021-11-12 22:56:21,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:21,329 INFO L225 Difference]: With dead ends: 41984 [2021-11-12 22:56:21,329 INFO L226 Difference]: Without dead ends: 38014 [2021-11-12 22:56:21,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2021-11-12 22:56:21,345 INFO L933 BasicCegarLoop]: 362 mSDtfsCounter, 763 mSDsluCounter, 2461 mSDsCounter, 0 mSdLazyCounter, 1291 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 716.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 2794 SdHoareTripleChecker+Invalid, 1310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.11ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 848.10ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:21,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [763 Valid, 2794 Invalid, 1310 Unknown, 0 Unchecked, 11.11ms Time], IncrementalHoareTripleChecker [19 Valid, 1291 Invalid, 0 Unknown, 0 Unchecked, 848.10ms Time] [2021-11-12 22:56:21,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38014 states. [2021-11-12 22:56:24,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38014 to 24688. [2021-11-12 22:56:24,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24688 states, 24687 states have (on average 1.4503584882731801) internal successors, (35805), 24687 states have internal predecessors, (35805), 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) [2021-11-12 22:56:24,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24688 states to 24688 states and 35805 transitions. [2021-11-12 22:56:24,144 INFO L78 Accepts]: Start accepts. Automaton has 24688 states and 35805 transitions. Word has length 71 [2021-11-12 22:56:24,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:24,144 INFO L470 AbstractCegarLoop]: Abstraction has 24688 states and 35805 transitions. [2021-11-12 22:56:24,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 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) [2021-11-12 22:56:24,144 INFO L276 IsEmpty]: Start isEmpty. Operand 24688 states and 35805 transitions. [2021-11-12 22:56:24,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-12 22:56:24,146 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:24,147 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:24,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-12 22:56:24,147 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:24,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:24,148 INFO L85 PathProgramCache]: Analyzing trace with hash -918898757, now seen corresponding path program 1 times [2021-11-12 22:56:24,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:56:24,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956665220] [2021-11-12 22:56:24,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:24,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:56:24,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:24,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:56:24,181 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:56:24,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956665220] [2021-11-12 22:56:24,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956665220] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:24,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:24,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:56:24,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451537898] [2021-11-12 22:56:24,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:24,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:56:24,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:56:24,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:56:24,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:56:24,183 INFO L87 Difference]: Start difference. First operand 24688 states and 35805 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) [2021-11-12 22:56:26,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:26,723 INFO L93 Difference]: Finished difference Result 44336 states and 64451 transitions. [2021-11-12 22:56:26,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:56:26,724 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 72 [2021-11-12 22:56:26,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:26,754 INFO L225 Difference]: With dead ends: 44336 [2021-11-12 22:56:26,754 INFO L226 Difference]: Without dead ends: 21000 [2021-11-12 22:56:26,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:56:26,782 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 138 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.08ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.46ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:26,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 366 Invalid, 43 Unknown, 0 Unchecked, 1.08ms Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 45.46ms Time] [2021-11-12 22:56:26,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21000 states. [2021-11-12 22:56:29,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21000 to 20725. [2021-11-12 22:56:29,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20725 states, 20724 states have (on average 1.4471144566685967) internal successors, (29990), 20724 states have internal predecessors, (29990), 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) [2021-11-12 22:56:29,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20725 states to 20725 states and 29990 transitions. [2021-11-12 22:56:29,134 INFO L78 Accepts]: Start accepts. Automaton has 20725 states and 29990 transitions. Word has length 72 [2021-11-12 22:56:29,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:29,135 INFO L470 AbstractCegarLoop]: Abstraction has 20725 states and 29990 transitions. [2021-11-12 22:56:29,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) [2021-11-12 22:56:29,135 INFO L276 IsEmpty]: Start isEmpty. Operand 20725 states and 29990 transitions. [2021-11-12 22:56:29,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-12 22:56:29,136 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:29,137 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:29,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-12 22:56:29,137 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:29,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:29,138 INFO L85 PathProgramCache]: Analyzing trace with hash -843250868, now seen corresponding path program 1 times [2021-11-12 22:56:29,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:56:29,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640772628] [2021-11-12 22:56:29,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:29,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:56:29,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:29,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:56:29,171 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:56:29,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640772628] [2021-11-12 22:56:29,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640772628] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:29,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:29,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:56:29,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178583749] [2021-11-12 22:56:29,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:29,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:56:29,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:56:29,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:56:29,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:56:29,173 INFO L87 Difference]: Start difference. First operand 20725 states and 29990 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) [2021-11-12 22:56:31,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:31,420 INFO L93 Difference]: Finished difference Result 35943 states and 52158 transitions. [2021-11-12 22:56:31,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:56:31,420 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 72 [2021-11-12 22:56:31,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:31,445 INFO L225 Difference]: With dead ends: 35943 [2021-11-12 22:56:31,445 INFO L226 Difference]: Without dead ends: 19196 [2021-11-12 22:56:31,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:56:31,457 INFO L933 BasicCegarLoop]: 264 mSDtfsCounter, 144 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.90ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.65ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:31,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 360 Invalid, 48 Unknown, 0 Unchecked, 0.90ms Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 44.65ms Time] [2021-11-12 22:56:31,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19196 states. [2021-11-12 22:56:33,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19196 to 19194. [2021-11-12 22:56:33,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19194 states, 19193 states have (on average 1.445058094096806) internal successors, (27735), 19193 states have internal predecessors, (27735), 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) [2021-11-12 22:56:33,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19194 states to 19194 states and 27735 transitions. [2021-11-12 22:56:33,516 INFO L78 Accepts]: Start accepts. Automaton has 19194 states and 27735 transitions. Word has length 72 [2021-11-12 22:56:33,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:33,516 INFO L470 AbstractCegarLoop]: Abstraction has 19194 states and 27735 transitions. [2021-11-12 22:56:33,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) [2021-11-12 22:56:33,516 INFO L276 IsEmpty]: Start isEmpty. Operand 19194 states and 27735 transitions. [2021-11-12 22:56:33,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-12 22:56:33,517 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:33,518 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:33,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-12 22:56:33,518 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:33,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:33,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1558349089, now seen corresponding path program 1 times [2021-11-12 22:56:33,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:56:33,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247539576] [2021-11-12 22:56:33,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:33,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:56:33,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:33,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:56:33,549 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:56:33,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247539576] [2021-11-12 22:56:33,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247539576] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:33,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:33,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:56:33,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95283936] [2021-11-12 22:56:33,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:33,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:56:33,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:56:33,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:56:33,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:56:33,551 INFO L87 Difference]: Start difference. First operand 19194 states and 27735 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) [2021-11-12 22:56:35,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:35,702 INFO L93 Difference]: Finished difference Result 33111 states and 48030 transitions. [2021-11-12 22:56:35,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:56:35,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 72 [2021-11-12 22:56:35,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:35,728 INFO L225 Difference]: With dead ends: 33111 [2021-11-12 22:56:35,728 INFO L226 Difference]: Without dead ends: 18558 [2021-11-12 22:56:35,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:56:35,744 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 135 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.90ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.32ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:35,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 360 Invalid, 47 Unknown, 0 Unchecked, 0.90ms Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 47.32ms Time] [2021-11-12 22:56:35,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18558 states. [2021-11-12 22:56:37,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18558 to 18556. [2021-11-12 22:56:37,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18556 states, 18555 states have (on average 1.4440851522500673) internal successors, (26795), 18555 states have internal predecessors, (26795), 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) [2021-11-12 22:56:37,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18556 states to 18556 states and 26795 transitions. [2021-11-12 22:56:37,886 INFO L78 Accepts]: Start accepts. Automaton has 18556 states and 26795 transitions. Word has length 72 [2021-11-12 22:56:37,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:37,886 INFO L470 AbstractCegarLoop]: Abstraction has 18556 states and 26795 transitions. [2021-11-12 22:56:37,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) [2021-11-12 22:56:37,886 INFO L276 IsEmpty]: Start isEmpty. Operand 18556 states and 26795 transitions. [2021-11-12 22:56:37,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-12 22:56:37,887 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:37,887 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:37,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-12 22:56:37,888 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:37,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:37,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1269200431, now seen corresponding path program 1 times [2021-11-12 22:56:37,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:56:37,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038634923] [2021-11-12 22:56:37,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:37,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:56:37,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:37,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:56:37,919 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:56:37,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038634923] [2021-11-12 22:56:37,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038634923] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:37,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:37,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:56:37,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306483518] [2021-11-12 22:56:37,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:37,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:56:37,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:56:37,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:56:37,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:56:37,921 INFO L87 Difference]: Start difference. First operand 18556 states and 26795 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) [2021-11-12 22:56:40,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:40,278 INFO L93 Difference]: Finished difference Result 32082 states and 46456 transitions. [2021-11-12 22:56:40,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:56:40,278 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 72 [2021-11-12 22:56:40,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:40,304 INFO L225 Difference]: With dead ends: 32082 [2021-11-12 22:56:40,304 INFO L226 Difference]: Without dead ends: 17865 [2021-11-12 22:56:40,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:56:40,320 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 139 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.98ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.43ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:40,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 348 Invalid, 49 Unknown, 0 Unchecked, 0.98ms Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 46.43ms Time] [2021-11-12 22:56:40,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17865 states. [2021-11-12 22:56:42,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17865 to 17863. [2021-11-12 22:56:42,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17863 states, 17862 states have (on average 1.4422237151494794) internal successors, (25761), 17862 states have internal predecessors, (25761), 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) [2021-11-12 22:56:42,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17863 states to 17863 states and 25761 transitions. [2021-11-12 22:56:42,409 INFO L78 Accepts]: Start accepts. Automaton has 17863 states and 25761 transitions. Word has length 72 [2021-11-12 22:56:42,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:42,409 INFO L470 AbstractCegarLoop]: Abstraction has 17863 states and 25761 transitions. [2021-11-12 22:56:42,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) [2021-11-12 22:56:42,409 INFO L276 IsEmpty]: Start isEmpty. Operand 17863 states and 25761 transitions. [2021-11-12 22:56:42,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-12 22:56:42,411 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:42,411 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:42,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-12 22:56:42,411 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:42,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:42,412 INFO L85 PathProgramCache]: Analyzing trace with hash -76649453, now seen corresponding path program 1 times [2021-11-12 22:56:42,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:56:42,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657223845] [2021-11-12 22:56:42,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:42,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:56:42,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:44,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:56:44,788 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:56:44,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657223845] [2021-11-12 22:56:44,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657223845] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:44,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:44,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-11-12 22:56:44,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43613480] [2021-11-12 22:56:44,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:44,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-12 22:56:44,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:56:44,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-12 22:56:44,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-11-12 22:56:44,790 INFO L87 Difference]: Start difference. First operand 17863 states and 25761 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 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) [2021-11-12 22:56:52,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:52,250 INFO L93 Difference]: Finished difference Result 22568 states and 32450 transitions. [2021-11-12 22:56:52,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-12 22:56:52,250 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 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 73 [2021-11-12 22:56:52,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:52,282 INFO L225 Difference]: With dead ends: 22568 [2021-11-12 22:56:52,282 INFO L226 Difference]: Without dead ends: 22566 [2021-11-12 22:56:52,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=425, Invalid=1737, Unknown=0, NotChecked=0, Total=2162 [2021-11-12 22:56:52,291 INFO L933 BasicCegarLoop]: 307 mSDtfsCounter, 854 mSDsluCounter, 2711 mSDsCounter, 0 mSdLazyCounter, 3632 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2479.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 854 SdHoareTripleChecker+Valid, 3013 SdHoareTripleChecker+Invalid, 3668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.81ms SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 3632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2822.48ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:52,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [854 Valid, 3013 Invalid, 3668 Unknown, 0 Unchecked, 13.81ms Time], IncrementalHoareTripleChecker [36 Valid, 3632 Invalid, 0 Unknown, 0 Unchecked, 2822.48ms Time] [2021-11-12 22:56:52,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22566 states. [2021-11-12 22:56:54,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22566 to 17869. [2021-11-12 22:56:54,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17869 states, 17868 states have (on average 1.442131184239982) internal successors, (25768), 17868 states have internal predecessors, (25768), 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) [2021-11-12 22:56:54,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17869 states to 17869 states and 25768 transitions. [2021-11-12 22:56:54,424 INFO L78 Accepts]: Start accepts. Automaton has 17869 states and 25768 transitions. Word has length 73 [2021-11-12 22:56:54,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:54,425 INFO L470 AbstractCegarLoop]: Abstraction has 17869 states and 25768 transitions. [2021-11-12 22:56:54,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 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) [2021-11-12 22:56:54,425 INFO L276 IsEmpty]: Start isEmpty. Operand 17869 states and 25768 transitions. [2021-11-12 22:56:54,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-12 22:56:54,426 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:54,426 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:54,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-12 22:56:54,427 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:54,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:54,427 INFO L85 PathProgramCache]: Analyzing trace with hash 823232627, now seen corresponding path program 1 times [2021-11-12 22:56:54,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:56:54,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281357157] [2021-11-12 22:56:54,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:54,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:56:54,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:56,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:56:56,963 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:56:56,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281357157] [2021-11-12 22:56:56,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281357157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:56,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:56,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-11-12 22:56:56,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920676991] [2021-11-12 22:56:56,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:56,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-12 22:56:56,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:56:56,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-12 22:56:56,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-11-12 22:56:56,964 INFO L87 Difference]: Start difference. First operand 17869 states and 25768 transitions. Second operand has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 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) [2021-11-12 22:57:04,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:57:04,731 INFO L93 Difference]: Finished difference Result 22579 states and 32542 transitions. [2021-11-12 22:57:04,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-12 22:57:04,732 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 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 73 [2021-11-12 22:57:04,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:57:04,771 INFO L225 Difference]: With dead ends: 22579 [2021-11-12 22:57:04,772 INFO L226 Difference]: Without dead ends: 20785 [2021-11-12 22:57:04,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=548, Invalid=2104, Unknown=0, NotChecked=0, Total=2652 [2021-11-12 22:57:04,783 INFO L933 BasicCegarLoop]: 333 mSDtfsCounter, 1172 mSDsluCounter, 3060 mSDsCounter, 0 mSdLazyCounter, 4376 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2573.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1172 SdHoareTripleChecker+Valid, 3387 SdHoareTripleChecker+Invalid, 4403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.72ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 4376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3000.04ms IncrementalHoareTripleChecker+Time [2021-11-12 22:57:04,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1172 Valid, 3387 Invalid, 4403 Unknown, 0 Unchecked, 16.72ms Time], IncrementalHoareTripleChecker [27 Valid, 4376 Invalid, 0 Unknown, 0 Unchecked, 3000.04ms Time] [2021-11-12 22:57:04,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20785 states. [2021-11-12 22:57:06,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20785 to 17869. [2021-11-12 22:57:06,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17869 states, 17868 states have (on average 1.442131184239982) internal successors, (25768), 17868 states have internal predecessors, (25768), 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) [2021-11-12 22:57:07,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17869 states to 17869 states and 25768 transitions. [2021-11-12 22:57:07,012 INFO L78 Accepts]: Start accepts. Automaton has 17869 states and 25768 transitions. Word has length 73 [2021-11-12 22:57:07,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:57:07,013 INFO L470 AbstractCegarLoop]: Abstraction has 17869 states and 25768 transitions. [2021-11-12 22:57:07,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 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) [2021-11-12 22:57:07,013 INFO L276 IsEmpty]: Start isEmpty. Operand 17869 states and 25768 transitions. [2021-11-12 22:57:07,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-12 22:57:07,014 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:57:07,014 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:57:07,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-12 22:57:07,014 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:57:07,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:57:07,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1356108883, now seen corresponding path program 1 times [2021-11-12 22:57:07,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:57:07,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282043102] [2021-11-12 22:57:07,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:07,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:57:07,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:07,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:57:07,961 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:57:07,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282043102] [2021-11-12 22:57:07,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282043102] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:57:07,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:57:07,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-12 22:57:07,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473295982] [2021-11-12 22:57:07,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:57:07,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-12 22:57:07,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:57:07,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-12 22:57:07,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-11-12 22:57:07,963 INFO L87 Difference]: Start difference. First operand 17869 states and 25768 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 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) [2021-11-12 22:57:12,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:57:12,967 INFO L93 Difference]: Finished difference Result 22561 states and 32443 transitions. [2021-11-12 22:57:12,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-12 22:57:12,968 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 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 73 [2021-11-12 22:57:12,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:57:12,996 INFO L225 Difference]: With dead ends: 22561 [2021-11-12 22:57:12,996 INFO L226 Difference]: Without dead ends: 22559 [2021-11-12 22:57:13,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=298, Invalid=1262, Unknown=0, NotChecked=0, Total=1560 [2021-11-12 22:57:13,003 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 1050 mSDsluCounter, 1873 mSDsCounter, 0 mSdLazyCounter, 2325 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1223.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1050 SdHoareTripleChecker+Valid, 2074 SdHoareTripleChecker+Invalid, 2355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.95ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1446.36ms IncrementalHoareTripleChecker+Time [2021-11-12 22:57:13,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1050 Valid, 2074 Invalid, 2355 Unknown, 0 Unchecked, 8.95ms Time], IncrementalHoareTripleChecker [30 Valid, 2325 Invalid, 0 Unknown, 0 Unchecked, 1446.36ms Time] [2021-11-12 22:57:13,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22559 states. [2021-11-12 22:57:15,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22559 to 17868. [2021-11-12 22:57:15,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17868 states, 17867 states have (on average 1.4420999608216265) internal successors, (25766), 17867 states have internal predecessors, (25766), 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) [2021-11-12 22:57:15,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17868 states to 17868 states and 25766 transitions. [2021-11-12 22:57:15,272 INFO L78 Accepts]: Start accepts. Automaton has 17868 states and 25766 transitions. Word has length 73 [2021-11-12 22:57:15,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:57:15,272 INFO L470 AbstractCegarLoop]: Abstraction has 17868 states and 25766 transitions. [2021-11-12 22:57:15,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 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) [2021-11-12 22:57:15,272 INFO L276 IsEmpty]: Start isEmpty. Operand 17868 states and 25766 transitions. [2021-11-12 22:57:15,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-12 22:57:15,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:57:15,273 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:57:15,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-12 22:57:15,274 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:57:15,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:57:15,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1344085965, now seen corresponding path program 1 times [2021-11-12 22:57:15,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:57:15,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698361406] [2021-11-12 22:57:15,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:15,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:57:15,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:15,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:57:15,911 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:57:15,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698361406] [2021-11-12 22:57:15,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698361406] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:57:15,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:57:15,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-12 22:57:15,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658459359] [2021-11-12 22:57:15,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:57:15,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-12 22:57:15,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:57:15,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-12 22:57:15,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-11-12 22:57:15,912 INFO L87 Difference]: Start difference. First operand 17868 states and 25766 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 20 states have internal predecessors, (73), 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) [2021-11-12 22:57:19,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:57:19,585 INFO L93 Difference]: Finished difference Result 22546 states and 32430 transitions. [2021-11-12 22:57:19,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-12 22:57:19,586 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 20 states have internal predecessors, (73), 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 73 [2021-11-12 22:57:19,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:57:19,611 INFO L225 Difference]: With dead ends: 22546 [2021-11-12 22:57:19,611 INFO L226 Difference]: Without dead ends: 22544 [2021-11-12 22:57:19,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=775, Unknown=0, NotChecked=0, Total=992 [2021-11-12 22:57:19,616 INFO L933 BasicCegarLoop]: 395 mSDtfsCounter, 761 mSDsluCounter, 2628 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 516.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 2989 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.12ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 614.62ms IncrementalHoareTripleChecker+Time [2021-11-12 22:57:19,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [761 Valid, 2989 Invalid, 900 Unknown, 0 Unchecked, 7.12ms Time], IncrementalHoareTripleChecker [16 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 614.62ms Time] [2021-11-12 22:57:19,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22544 states. [2021-11-12 22:57:21,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22544 to 17871. [2021-11-12 22:57:21,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17871 states, 17870 states have (on average 1.4420257414661444) internal successors, (25769), 17870 states have internal predecessors, (25769), 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) [2021-11-12 22:57:21,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17871 states to 17871 states and 25769 transitions. [2021-11-12 22:57:21,781 INFO L78 Accepts]: Start accepts. Automaton has 17871 states and 25769 transitions. Word has length 73 [2021-11-12 22:57:21,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:57:21,782 INFO L470 AbstractCegarLoop]: Abstraction has 17871 states and 25769 transitions. [2021-11-12 22:57:21,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 20 states have internal predecessors, (73), 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) [2021-11-12 22:57:21,782 INFO L276 IsEmpty]: Start isEmpty. Operand 17871 states and 25769 transitions. [2021-11-12 22:57:21,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-12 22:57:21,783 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:57:21,783 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:57:21,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-12 22:57:21,783 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:57:21,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:57:21,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1557480595, now seen corresponding path program 1 times [2021-11-12 22:57:21,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:57:21,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918830241] [2021-11-12 22:57:21,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:21,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:57:21,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:22,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:57:22,997 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:57:22,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918830241] [2021-11-12 22:57:22,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918830241] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:57:22,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:57:22,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-11-12 22:57:22,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054587840] [2021-11-12 22:57:22,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:57:22,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-12 22:57:22,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:57:22,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-12 22:57:22,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-11-12 22:57:22,999 INFO L87 Difference]: Start difference. First operand 17871 states and 25769 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 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) [2021-11-12 22:57:28,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:57:28,228 INFO L93 Difference]: Finished difference Result 24695 states and 35568 transitions. [2021-11-12 22:57:28,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-12 22:57:28,229 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 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 73 [2021-11-12 22:57:28,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:57:28,263 INFO L225 Difference]: With dead ends: 24695 [2021-11-12 22:57:28,263 INFO L226 Difference]: Without dead ends: 22933 [2021-11-12 22:57:28,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=333, Invalid=1307, Unknown=0, NotChecked=0, Total=1640 [2021-11-12 22:57:28,273 INFO L933 BasicCegarLoop]: 327 mSDtfsCounter, 945 mSDsluCounter, 2266 mSDsCounter, 0 mSdLazyCounter, 2675 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1364.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 945 SdHoareTripleChecker+Valid, 2588 SdHoareTripleChecker+Invalid, 2708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.67ms SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1595.19ms IncrementalHoareTripleChecker+Time [2021-11-12 22:57:28,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [945 Valid, 2588 Invalid, 2708 Unknown, 0 Unchecked, 9.67ms Time], IncrementalHoareTripleChecker [33 Valid, 2675 Invalid, 0 Unknown, 0 Unchecked, 1595.19ms Time] [2021-11-12 22:57:28,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22933 states. [2021-11-12 22:57:30,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22933 to 18674. [2021-11-12 22:57:30,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18674 states, 18673 states have (on average 1.4424034702511648) internal successors, (26934), 18673 states have internal predecessors, (26934), 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) [2021-11-12 22:57:30,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18674 states to 18674 states and 26934 transitions. [2021-11-12 22:57:30,679 INFO L78 Accepts]: Start accepts. Automaton has 18674 states and 26934 transitions. Word has length 73 [2021-11-12 22:57:30,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:57:30,679 INFO L470 AbstractCegarLoop]: Abstraction has 18674 states and 26934 transitions. [2021-11-12 22:57:30,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 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) [2021-11-12 22:57:30,680 INFO L276 IsEmpty]: Start isEmpty. Operand 18674 states and 26934 transitions. [2021-11-12 22:57:30,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-12 22:57:30,681 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:57:30,681 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:57:30,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-12 22:57:30,681 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:57:30,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:57:30,682 INFO L85 PathProgramCache]: Analyzing trace with hash 2090356851, now seen corresponding path program 1 times [2021-11-12 22:57:30,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:57:30,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833045247] [2021-11-12 22:57:30,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:30,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:57:30,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:32,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:57:32,064 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:57:32,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833045247] [2021-11-12 22:57:32,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833045247] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:57:32,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:57:32,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-11-12 22:57:32,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552229738] [2021-11-12 22:57:32,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:57:32,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-12 22:57:32,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:57:32,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-12 22:57:32,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-11-12 22:57:32,066 INFO L87 Difference]: Start difference. First operand 18674 states and 26934 transitions. Second operand has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 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) [2021-11-12 22:57:38,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:57:38,701 INFO L93 Difference]: Finished difference Result 23358 states and 33603 transitions. [2021-11-12 22:57:38,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-12 22:57:38,701 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 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 73 [2021-11-12 22:57:38,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:57:38,738 INFO L225 Difference]: With dead ends: 23358 [2021-11-12 22:57:38,738 INFO L226 Difference]: Without dead ends: 23356 [2021-11-12 22:57:38,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=375, Invalid=1517, Unknown=0, NotChecked=0, Total=1892 [2021-11-12 22:57:38,747 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 868 mSDsluCounter, 2614 mSDsCounter, 0 mSdLazyCounter, 3744 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2082.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 868 SdHoareTripleChecker+Valid, 2823 SdHoareTripleChecker+Invalid, 3769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.79ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 3744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2411.14ms IncrementalHoareTripleChecker+Time [2021-11-12 22:57:38,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [868 Valid, 2823 Invalid, 3769 Unknown, 0 Unchecked, 12.79ms Time], IncrementalHoareTripleChecker [25 Valid, 3744 Invalid, 0 Unknown, 0 Unchecked, 2411.14ms Time] [2021-11-12 22:57:38,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23356 states. [2021-11-12 22:57:41,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23356 to 18677. [2021-11-12 22:57:41,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18677 states, 18676 states have (on average 1.4423859498822018) internal successors, (26938), 18676 states have internal predecessors, (26938), 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) [2021-11-12 22:57:41,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18677 states to 18677 states and 26938 transitions. [2021-11-12 22:57:41,180 INFO L78 Accepts]: Start accepts. Automaton has 18677 states and 26938 transitions. Word has length 73 [2021-11-12 22:57:41,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:57:41,180 INFO L470 AbstractCegarLoop]: Abstraction has 18677 states and 26938 transitions. [2021-11-12 22:57:41,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 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) [2021-11-12 22:57:41,181 INFO L276 IsEmpty]: Start isEmpty. Operand 18677 states and 26938 transitions. [2021-11-12 22:57:41,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-12 22:57:41,181 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:57:41,182 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:57:41,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-12 22:57:41,182 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:57:41,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:57:41,182 INFO L85 PathProgramCache]: Analyzing trace with hash -609837997, now seen corresponding path program 1 times [2021-11-12 22:57:41,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:57:41,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9276196] [2021-11-12 22:57:41,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:41,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:57:41,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:42,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:57:42,649 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:57:42,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9276196] [2021-11-12 22:57:42,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9276196] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:57:42,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:57:42,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-11-12 22:57:42,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633696461] [2021-11-12 22:57:42,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:57:42,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-12 22:57:42,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:57:42,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-12 22:57:42,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-11-12 22:57:42,651 INFO L87 Difference]: Start difference. First operand 18677 states and 26938 transitions. Second operand has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 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) [2021-11-12 22:57:49,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:57:49,181 INFO L93 Difference]: Finished difference Result 23478 states and 33787 transitions. [2021-11-12 22:57:49,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-12 22:57:49,184 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 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 73 [2021-11-12 22:57:49,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:57:49,217 INFO L225 Difference]: With dead ends: 23478 [2021-11-12 22:57:49,217 INFO L226 Difference]: Without dead ends: 23476 [2021-11-12 22:57:49,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=386, Invalid=1594, Unknown=0, NotChecked=0, Total=1980 [2021-11-12 22:57:49,226 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 999 mSDsluCounter, 4057 mSDsCounter, 0 mSdLazyCounter, 3099 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1921.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 999 SdHoareTripleChecker+Valid, 4345 SdHoareTripleChecker+Invalid, 3123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.68ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 3099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2217.23ms IncrementalHoareTripleChecker+Time [2021-11-12 22:57:49,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [999 Valid, 4345 Invalid, 3123 Unknown, 0 Unchecked, 14.68ms Time], IncrementalHoareTripleChecker [24 Valid, 3099 Invalid, 0 Unknown, 0 Unchecked, 2217.23ms Time] [2021-11-12 22:57:49,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23476 states. [2021-11-12 22:57:51,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23476 to 18677. [2021-11-12 22:57:51,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18677 states, 18676 states have (on average 1.4423859498822018) internal successors, (26938), 18676 states have internal predecessors, (26938), 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) [2021-11-12 22:57:51,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18677 states to 18677 states and 26938 transitions. [2021-11-12 22:57:51,674 INFO L78 Accepts]: Start accepts. Automaton has 18677 states and 26938 transitions. Word has length 73 [2021-11-12 22:57:51,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:57:51,674 INFO L470 AbstractCegarLoop]: Abstraction has 18677 states and 26938 transitions. [2021-11-12 22:57:51,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 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) [2021-11-12 22:57:51,674 INFO L276 IsEmpty]: Start isEmpty. Operand 18677 states and 26938 transitions. [2021-11-12 22:57:51,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-12 22:57:51,675 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:57:51,675 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:57:51,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-12 22:57:51,676 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:57:51,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:57:51,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1171751725, now seen corresponding path program 1 times [2021-11-12 22:57:51,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:57:51,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124392248] [2021-11-12 22:57:51,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:51,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:57:51,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:53,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:57:53,147 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:57:53,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124392248] [2021-11-12 22:57:53,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124392248] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:57:53,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:57:53,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-11-12 22:57:53,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689373386] [2021-11-12 22:57:53,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:57:53,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-12 22:57:53,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:57:53,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-12 22:57:53,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-11-12 22:57:53,148 INFO L87 Difference]: Start difference. First operand 18677 states and 26938 transitions. Second operand has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 states have internal predecessors, (73), 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) [2021-11-12 22:58:00,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:58:00,123 INFO L93 Difference]: Finished difference Result 31145 states and 45082 transitions. [2021-11-12 22:58:00,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-12 22:58:00,124 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 states have internal predecessors, (73), 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 73 [2021-11-12 22:58:00,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:58:00,168 INFO L225 Difference]: With dead ends: 31145 [2021-11-12 22:58:00,168 INFO L226 Difference]: Without dead ends: 27783 [2021-11-12 22:58:00,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=425, Invalid=1737, Unknown=0, NotChecked=0, Total=2162 [2021-11-12 22:58:00,184 INFO L933 BasicCegarLoop]: 402 mSDtfsCounter, 906 mSDsluCounter, 4639 mSDsCounter, 0 mSdLazyCounter, 2891 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1736.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 4986 SdHoareTripleChecker+Invalid, 2920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.33ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2023.24ms IncrementalHoareTripleChecker+Time [2021-11-12 22:58:00,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [906 Valid, 4986 Invalid, 2920 Unknown, 0 Unchecked, 15.33ms Time], IncrementalHoareTripleChecker [29 Valid, 2891 Invalid, 0 Unknown, 0 Unchecked, 2023.24ms Time] [2021-11-12 22:58:00,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27783 states. [2021-11-12 22:58:02,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27783 to 18661. [2021-11-12 22:58:02,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18661 states, 18660 states have (on average 1.442711682743837) internal successors, (26921), 18660 states have internal predecessors, (26921), 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) [2021-11-12 22:58:02,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18661 states to 18661 states and 26921 transitions. [2021-11-12 22:58:02,775 INFO L78 Accepts]: Start accepts. Automaton has 18661 states and 26921 transitions. Word has length 73 [2021-11-12 22:58:02,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:58:02,775 INFO L470 AbstractCegarLoop]: Abstraction has 18661 states and 26921 transitions. [2021-11-12 22:58:02,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 states have internal predecessors, (73), 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) [2021-11-12 22:58:02,776 INFO L276 IsEmpty]: Start isEmpty. Operand 18661 states and 26921 transitions. [2021-11-12 22:58:02,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-12 22:58:02,777 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:58:02,777 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:58:02,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-12 22:58:02,777 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:58:02,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:58:02,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1977306259, now seen corresponding path program 1 times [2021-11-12 22:58:02,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:58:02,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711365448] [2021-11-12 22:58:02,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:58:02,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:58:02,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:58:05,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:58:05,746 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:58:05,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711365448] [2021-11-12 22:58:05,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711365448] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:58:05,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:58:05,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-11-12 22:58:05,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555936421] [2021-11-12 22:58:05,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:58:05,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-12 22:58:05,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:58:05,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-12 22:58:05,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2021-11-12 22:58:05,750 INFO L87 Difference]: Start difference. First operand 18661 states and 26921 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 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) [2021-11-12 22:58:14,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:58:14,637 INFO L93 Difference]: Finished difference Result 21564 states and 31054 transitions. [2021-11-12 22:58:14,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-12 22:58:14,637 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 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 73 [2021-11-12 22:58:14,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:58:14,663 INFO L225 Difference]: With dead ends: 21564 [2021-11-12 22:58:14,663 INFO L226 Difference]: Without dead ends: 21562 [2021-11-12 22:58:14,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=624, Invalid=2346, Unknown=0, NotChecked=0, Total=2970 [2021-11-12 22:58:14,668 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 864 mSDsluCounter, 2914 mSDsCounter, 0 mSdLazyCounter, 4550 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2927.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 864 SdHoareTripleChecker+Valid, 3241 SdHoareTripleChecker+Invalid, 4579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.04ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 4550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3357.54ms IncrementalHoareTripleChecker+Time [2021-11-12 22:58:14,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [864 Valid, 3241 Invalid, 4579 Unknown, 0 Unchecked, 16.04ms Time], IncrementalHoareTripleChecker [29 Valid, 4550 Invalid, 0 Unknown, 0 Unchecked, 3357.54ms Time] [2021-11-12 22:58:14,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21562 states. [2021-11-12 22:58:17,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21562 to 18664. [2021-11-12 22:58:17,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18664 states, 18663 states have (on average 1.442694100626909) internal successors, (26925), 18663 states have internal predecessors, (26925), 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) [2021-11-12 22:58:17,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18664 states to 18664 states and 26925 transitions. [2021-11-12 22:58:17,147 INFO L78 Accepts]: Start accepts. Automaton has 18664 states and 26925 transitions. Word has length 73 [2021-11-12 22:58:17,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:58:17,148 INFO L470 AbstractCegarLoop]: Abstraction has 18664 states and 26925 transitions. [2021-11-12 22:58:17,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 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) [2021-11-12 22:58:17,148 INFO L276 IsEmpty]: Start isEmpty. Operand 18664 states and 26925 transitions. [2021-11-12 22:58:17,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-12 22:58:17,150 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:58:17,150 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:58:17,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-12 22:58:17,151 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:58:17,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:58:17,151 INFO L85 PathProgramCache]: Analyzing trace with hash -860742702, now seen corresponding path program 1 times [2021-11-12 22:58:17,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:58:17,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436502983] [2021-11-12 22:58:17,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:58:17,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:58:17,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:58:17,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:58:17,180 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:58:17,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436502983] [2021-11-12 22:58:17,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436502983] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:58:17,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:58:17,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:58:17,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366646582] [2021-11-12 22:58:17,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:58:17,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:58:17,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:58:17,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:58:17,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:58:17,182 INFO L87 Difference]: Start difference. First operand 18664 states and 26925 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2021-11-12 22:58:19,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:58:19,745 INFO L93 Difference]: Finished difference Result 35301 states and 51090 transitions. [2021-11-12 22:58:19,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:58:19,746 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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 74 [2021-11-12 22:58:19,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:58:19,773 INFO L225 Difference]: With dead ends: 35301 [2021-11-12 22:58:19,773 INFO L226 Difference]: Without dead ends: 18063 [2021-11-12 22:58:19,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:58:19,789 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 124 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.71ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.78ms IncrementalHoareTripleChecker+Time [2021-11-12 22:58:19,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 356 Invalid, 46 Unknown, 0 Unchecked, 0.71ms Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 40.78ms Time] [2021-11-12 22:58:19,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18063 states. [2021-11-12 22:58:22,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18063 to 18061. [2021-11-12 22:58:22,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18061 states, 18060 states have (on average 1.4409745293466223) internal successors, (26024), 18060 states have internal predecessors, (26024), 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) [2021-11-12 22:58:22,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18061 states to 18061 states and 26024 transitions. [2021-11-12 22:58:22,312 INFO L78 Accepts]: Start accepts. Automaton has 18061 states and 26024 transitions. Word has length 74 [2021-11-12 22:58:22,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:58:22,313 INFO L470 AbstractCegarLoop]: Abstraction has 18061 states and 26024 transitions. [2021-11-12 22:58:22,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2021-11-12 22:58:22,313 INFO L276 IsEmpty]: Start isEmpty. Operand 18061 states and 26024 transitions. [2021-11-12 22:58:22,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-12 22:58:22,315 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:58:22,315 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:58:22,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-12 22:58:22,315 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:58:22,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:58:22,315 INFO L85 PathProgramCache]: Analyzing trace with hash -8055641, now seen corresponding path program 1 times [2021-11-12 22:58:22,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:58:22,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182338818] [2021-11-12 22:58:22,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:58:22,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:58:22,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:58:24,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:58:24,900 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:58:24,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182338818] [2021-11-12 22:58:24,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182338818] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:58:24,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:58:24,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-11-12 22:58:24,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144517679] [2021-11-12 22:58:24,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:58:24,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-12 22:58:24,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:58:24,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-12 22:58:24,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-11-12 22:58:24,902 INFO L87 Difference]: Start difference. First operand 18061 states and 26024 transitions. Second operand has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 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) [2021-11-12 22:58:33,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:58:33,564 INFO L93 Difference]: Finished difference Result 20890 states and 30025 transitions. [2021-11-12 22:58:33,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-12 22:58:33,565 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 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 75 [2021-11-12 22:58:33,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:58:33,597 INFO L225 Difference]: With dead ends: 20890 [2021-11-12 22:58:33,597 INFO L226 Difference]: Without dead ends: 20888 [2021-11-12 22:58:33,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=615, Invalid=2465, Unknown=0, NotChecked=0, Total=3080 [2021-11-12 22:58:33,606 INFO L933 BasicCegarLoop]: 408 mSDtfsCounter, 1272 mSDsluCounter, 4684 mSDsCounter, 0 mSdLazyCounter, 3675 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2433.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1272 SdHoareTripleChecker+Valid, 5048 SdHoareTripleChecker+Invalid, 3707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.11ms SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 3675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2798.16ms IncrementalHoareTripleChecker+Time [2021-11-12 22:58:33,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1272 Valid, 5048 Invalid, 3707 Unknown, 0 Unchecked, 18.11ms Time], IncrementalHoareTripleChecker [32 Valid, 3675 Invalid, 0 Unknown, 0 Unchecked, 2798.16ms Time] [2021-11-12 22:58:33,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20888 states. [2021-11-12 22:58:36,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20888 to 18061. [2021-11-12 22:58:36,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18061 states, 18060 states have (on average 1.4409745293466223) internal successors, (26024), 18060 states have internal predecessors, (26024), 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) [2021-11-12 22:58:36,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18061 states to 18061 states and 26024 transitions. [2021-11-12 22:58:36,205 INFO L78 Accepts]: Start accepts. Automaton has 18061 states and 26024 transitions. Word has length 75 [2021-11-12 22:58:36,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:58:36,206 INFO L470 AbstractCegarLoop]: Abstraction has 18061 states and 26024 transitions. [2021-11-12 22:58:36,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 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) [2021-11-12 22:58:36,206 INFO L276 IsEmpty]: Start isEmpty. Operand 18061 states and 26024 transitions. [2021-11-12 22:58:36,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-12 22:58:36,207 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:58:36,207 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:58:36,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-12 22:58:36,207 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:58:36,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:58:36,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1229605063, now seen corresponding path program 1 times [2021-11-12 22:58:36,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:58:36,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029385434] [2021-11-12 22:58:36,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:58:36,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:58:36,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:58:40,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:58:40,787 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:58:40,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029385434] [2021-11-12 22:58:40,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029385434] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:58:40,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:58:40,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-11-12 22:58:40,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296595466] [2021-11-12 22:58:40,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:58:40,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-12 22:58:40,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:58:40,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-12 22:58:40,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2021-11-12 22:58:40,790 INFO L87 Difference]: Start difference. First operand 18061 states and 26024 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 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) [2021-11-12 22:58:53,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:58:53,169 INFO L93 Difference]: Finished difference Result 20873 states and 30007 transitions. [2021-11-12 22:58:53,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-12 22:58:53,169 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 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 75 [2021-11-12 22:58:53,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:58:53,195 INFO L225 Difference]: With dead ends: 20873 [2021-11-12 22:58:53,195 INFO L226 Difference]: Without dead ends: 20871 [2021-11-12 22:58:53,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=754, Invalid=2906, Unknown=0, NotChecked=0, Total=3660 [2021-11-12 22:58:53,201 INFO L933 BasicCegarLoop]: 323 mSDtfsCounter, 1357 mSDsluCounter, 3739 mSDsCounter, 0 mSdLazyCounter, 6279 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4378.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1357 SdHoareTripleChecker+Valid, 4055 SdHoareTripleChecker+Invalid, 6323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.09ms SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 6279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4979.74ms IncrementalHoareTripleChecker+Time [2021-11-12 22:58:53,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1357 Valid, 4055 Invalid, 6323 Unknown, 0 Unchecked, 21.09ms Time], IncrementalHoareTripleChecker [44 Valid, 6279 Invalid, 0 Unknown, 0 Unchecked, 4979.74ms Time] [2021-11-12 22:58:53,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20871 states. [2021-11-12 22:58:55,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20871 to 18061. [2021-11-12 22:58:55,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18061 states, 18060 states have (on average 1.4409745293466223) internal successors, (26024), 18060 states have internal predecessors, (26024), 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) [2021-11-12 22:58:55,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18061 states to 18061 states and 26024 transitions. [2021-11-12 22:58:55,788 INFO L78 Accepts]: Start accepts. Automaton has 18061 states and 26024 transitions. Word has length 75 [2021-11-12 22:58:55,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:58:55,789 INFO L470 AbstractCegarLoop]: Abstraction has 18061 states and 26024 transitions. [2021-11-12 22:58:55,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 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) [2021-11-12 22:58:55,789 INFO L276 IsEmpty]: Start isEmpty. Operand 18061 states and 26024 transitions. [2021-11-12 22:58:55,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-12 22:58:55,790 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:58:55,790 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:58:55,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-11-12 22:58:55,791 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:58:55,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:58:55,791 INFO L85 PathProgramCache]: Analyzing trace with hash 2129487143, now seen corresponding path program 1 times [2021-11-12 22:58:55,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:58:55,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469117310] [2021-11-12 22:58:55,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:58:55,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:58:55,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:58:58,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:58:58,695 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:58:58,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469117310] [2021-11-12 22:58:58,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469117310] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:58:58,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:58:58,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-11-12 22:58:58,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066789319] [2021-11-12 22:58:58,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:58:58,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-12 22:58:58,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:58:58,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-12 22:58:58,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-11-12 22:58:58,697 INFO L87 Difference]: Start difference. First operand 18061 states and 26024 transitions. Second operand has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 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) [2021-11-12 22:59:12,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:12,460 INFO L93 Difference]: Finished difference Result 27102 states and 39024 transitions. [2021-11-12 22:59:12,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-12 22:59:12,460 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 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 75 [2021-11-12 22:59:12,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:59:12,498 INFO L225 Difference]: With dead ends: 27102 [2021-11-12 22:59:12,498 INFO L226 Difference]: Without dead ends: 25372 [2021-11-12 22:59:12,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=856, Invalid=3176, Unknown=0, NotChecked=0, Total=4032 [2021-11-12 22:59:12,508 INFO L933 BasicCegarLoop]: 357 mSDtfsCounter, 1279 mSDsluCounter, 3649 mSDsCounter, 0 mSdLazyCounter, 6084 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4022.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1279 SdHoareTripleChecker+Valid, 3998 SdHoareTripleChecker+Invalid, 6143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.25ms SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 6084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4627.02ms IncrementalHoareTripleChecker+Time [2021-11-12 22:59:12,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1279 Valid, 3998 Invalid, 6143 Unknown, 0 Unchecked, 22.25ms Time], IncrementalHoareTripleChecker [59 Valid, 6084 Invalid, 0 Unknown, 0 Unchecked, 4627.02ms Time] [2021-11-12 22:59:12,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25372 states. [2021-11-12 22:59:15,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25372 to 18045. [2021-11-12 22:59:15,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18045 states, 18044 states have (on average 1.441310130791399) internal successors, (26007), 18044 states have internal predecessors, (26007), 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) [2021-11-12 22:59:15,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18045 states to 18045 states and 26007 transitions. [2021-11-12 22:59:15,203 INFO L78 Accepts]: Start accepts. Automaton has 18045 states and 26007 transitions. Word has length 75 [2021-11-12 22:59:15,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:59:15,204 INFO L470 AbstractCegarLoop]: Abstraction has 18045 states and 26007 transitions. [2021-11-12 22:59:15,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 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) [2021-11-12 22:59:15,204 INFO L276 IsEmpty]: Start isEmpty. Operand 18045 states and 26007 transitions. [2021-11-12 22:59:15,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-12 22:59:15,205 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:59:15,205 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:59:15,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-12 22:59:15,205 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:59:15,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:59:15,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1632603897, now seen corresponding path program 1 times [2021-11-12 22:59:15,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:59:15,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748595713] [2021-11-12 22:59:15,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:59:15,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:59:15,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:59:18,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:59:18,262 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:59:18,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748595713] [2021-11-12 22:59:18,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748595713] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:59:18,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:59:18,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-11-12 22:59:18,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550140600] [2021-11-12 22:59:18,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:59:18,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-12 22:59:18,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:59:18,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-12 22:59:18,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2021-11-12 22:59:18,264 INFO L87 Difference]: Start difference. First operand 18045 states and 26007 transitions. Second operand has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 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) [2021-11-12 22:59:27,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:27,871 INFO L93 Difference]: Finished difference Result 20825 states and 29955 transitions. [2021-11-12 22:59:27,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-12 22:59:27,871 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 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 75 [2021-11-12 22:59:27,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:59:27,897 INFO L225 Difference]: With dead ends: 20825 [2021-11-12 22:59:27,897 INFO L226 Difference]: Without dead ends: 20823 [2021-11-12 22:59:27,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=590, Invalid=2166, Unknown=0, NotChecked=0, Total=2756 [2021-11-12 22:59:27,902 INFO L933 BasicCegarLoop]: 335 mSDtfsCounter, 993 mSDsluCounter, 2787 mSDsCounter, 0 mSdLazyCounter, 4072 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2755.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 993 SdHoareTripleChecker+Valid, 3114 SdHoareTripleChecker+Invalid, 4105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.86ms SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 4072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3165.27ms IncrementalHoareTripleChecker+Time [2021-11-12 22:59:27,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [993 Valid, 3114 Invalid, 4105 Unknown, 0 Unchecked, 14.86ms Time], IncrementalHoareTripleChecker [33 Valid, 4072 Invalid, 0 Unknown, 0 Unchecked, 3165.27ms Time] [2021-11-12 22:59:27,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20823 states. [2021-11-12 22:59:30,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20823 to 18041. [2021-11-12 22:59:30,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18041 states, 18040 states have (on average 1.4413525498891353) internal successors, (26002), 18040 states have internal predecessors, (26002), 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) [2021-11-12 22:59:30,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18041 states to 18041 states and 26002 transitions. [2021-11-12 22:59:30,639 INFO L78 Accepts]: Start accepts. Automaton has 18041 states and 26002 transitions. Word has length 75 [2021-11-12 22:59:30,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:59:30,639 INFO L470 AbstractCegarLoop]: Abstraction has 18041 states and 26002 transitions. [2021-11-12 22:59:30,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 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) [2021-11-12 22:59:30,639 INFO L276 IsEmpty]: Start isEmpty. Operand 18041 states and 26002 transitions. [2021-11-12 22:59:30,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-12 22:59:30,641 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:59:30,641 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:59:30,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-11-12 22:59:30,641 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:59:30,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:59:30,641 INFO L85 PathProgramCache]: Analyzing trace with hash -37831449, now seen corresponding path program 1 times [2021-11-12 22:59:30,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:59:30,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459419643] [2021-11-12 22:59:30,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:59:30,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:59:30,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:59:34,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:59:34,926 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:59:34,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459419643] [2021-11-12 22:59:34,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459419643] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:59:34,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:59:34,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-11-12 22:59:34,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587325346] [2021-11-12 22:59:34,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:59:34,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-12 22:59:34,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:59:34,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-12 22:59:34,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2021-11-12 22:59:34,928 INFO L87 Difference]: Start difference. First operand 18041 states and 26002 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 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) [2021-11-12 22:59:47,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:47,200 INFO L93 Difference]: Finished difference Result 22678 states and 32596 transitions. [2021-11-12 22:59:47,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-12 22:59:47,206 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 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 75 [2021-11-12 22:59:47,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:59:47,237 INFO L225 Difference]: With dead ends: 22678 [2021-11-12 22:59:47,237 INFO L226 Difference]: Without dead ends: 22676 [2021-11-12 22:59:47,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=687, Invalid=2973, Unknown=0, NotChecked=0, Total=3660 [2021-11-12 22:59:47,245 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 1361 mSDsluCounter, 2833 mSDsCounter, 0 mSdLazyCounter, 5329 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3882.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1361 SdHoareTripleChecker+Valid, 3083 SdHoareTripleChecker+Invalid, 5374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.66ms SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 5329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4415.76ms IncrementalHoareTripleChecker+Time [2021-11-12 22:59:47,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1361 Valid, 3083 Invalid, 5374 Unknown, 0 Unchecked, 19.66ms Time], IncrementalHoareTripleChecker [45 Valid, 5329 Invalid, 0 Unknown, 0 Unchecked, 4415.76ms Time] [2021-11-12 22:59:47,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22676 states. [2021-11-12 22:59:49,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22676 to 18041. [2021-11-12 22:59:49,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18041 states, 18040 states have (on average 1.4413525498891353) internal successors, (26002), 18040 states have internal predecessors, (26002), 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) [2021-11-12 22:59:50,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18041 states to 18041 states and 26002 transitions. [2021-11-12 22:59:50,024 INFO L78 Accepts]: Start accepts. Automaton has 18041 states and 26002 transitions. Word has length 75 [2021-11-12 22:59:50,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:59:50,025 INFO L470 AbstractCegarLoop]: Abstraction has 18041 states and 26002 transitions. [2021-11-12 22:59:50,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 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) [2021-11-12 22:59:50,025 INFO L276 IsEmpty]: Start isEmpty. Operand 18041 states and 26002 transitions. [2021-11-12 22:59:50,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-12 22:59:50,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:59:50,027 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:59:50,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-11-12 22:59:50,027 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:59:50,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:59:50,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1172083803, now seen corresponding path program 1 times [2021-11-12 22:59:50,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:59:50,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313372158] [2021-11-12 22:59:50,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:59:50,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:59:50,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:59:58,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:59:58,556 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:59:58,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313372158] [2021-11-12 22:59:58,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313372158] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:59:58,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:59:58,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2021-11-12 22:59:58,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731981776] [2021-11-12 22:59:58,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:59:58,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-12 22:59:58,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:59:58,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-12 22:59:58,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1595, Unknown=0, NotChecked=0, Total=1722 [2021-11-12 22:59:58,558 INFO L87 Difference]: Start difference. First operand 18041 states and 26002 transitions. Second operand has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 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) [2021-11-12 23:00:15,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:00:15,060 INFO L93 Difference]: Finished difference Result 20826 states and 29958 transitions. [2021-11-12 23:00:15,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-12 23:00:15,060 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 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 77 [2021-11-12 23:00:15,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:00:15,087 INFO L225 Difference]: With dead ends: 20826 [2021-11-12 23:00:15,087 INFO L226 Difference]: Without dead ends: 20824 [2021-11-12 23:00:15,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=1174, Invalid=4376, Unknown=0, NotChecked=0, Total=5550 [2021-11-12 23:00:15,094 INFO L933 BasicCegarLoop]: 356 mSDtfsCounter, 1141 mSDsluCounter, 5261 mSDsCounter, 0 mSdLazyCounter, 3961 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3454.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1141 SdHoareTripleChecker+Valid, 5608 SdHoareTripleChecker+Invalid, 3986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.71ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 3961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3885.78ms IncrementalHoareTripleChecker+Time [2021-11-12 23:00:15,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1141 Valid, 5608 Invalid, 3986 Unknown, 0 Unchecked, 21.71ms Time], IncrementalHoareTripleChecker [25 Valid, 3961 Invalid, 0 Unknown, 0 Unchecked, 3885.78ms Time] [2021-11-12 23:00:15,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20824 states. [2021-11-12 23:00:17,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20824 to 18017. [2021-11-12 23:00:17,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18017 states, 18016 states have (on average 1.441829484902309) internal successors, (25976), 18016 states have internal predecessors, (25976), 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) [2021-11-12 23:00:17,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18017 states to 18017 states and 25976 transitions. [2021-11-12 23:00:17,877 INFO L78 Accepts]: Start accepts. Automaton has 18017 states and 25976 transitions. Word has length 77 [2021-11-12 23:00:17,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:00:17,878 INFO L470 AbstractCegarLoop]: Abstraction has 18017 states and 25976 transitions. [2021-11-12 23:00:17,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 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) [2021-11-12 23:00:17,878 INFO L276 IsEmpty]: Start isEmpty. Operand 18017 states and 25976 transitions. [2021-11-12 23:00:17,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-12 23:00:17,880 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:00:17,880 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:00:17,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-11-12 23:00:17,880 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:00:17,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:00:17,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1973873642, now seen corresponding path program 1 times [2021-11-12 23:00:17,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:00:17,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604520024] [2021-11-12 23:00:17,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:17,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:00:17,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:17,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:00:17,923 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:00:17,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604520024] [2021-11-12 23:00:17,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604520024] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:00:17,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:00:17,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:00:17,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405352203] [2021-11-12 23:00:17,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:00:17,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:00:17,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:00:17,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:00:17,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:00:17,926 INFO L87 Difference]: Start difference. First operand 18017 states and 25976 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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) [2021-11-12 23:00:21,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:00:21,114 INFO L93 Difference]: Finished difference Result 28675 states and 41699 transitions. [2021-11-12 23:00:21,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:00:21,114 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 80 [2021-11-12 23:00:21,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:00:21,142 INFO L225 Difference]: With dead ends: 28675 [2021-11-12 23:00:21,142 INFO L226 Difference]: Without dead ends: 22065 [2021-11-12 23:00:21,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:00:21,151 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 97 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.70ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.23ms IncrementalHoareTripleChecker+Time [2021-11-12 23:00:21,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 408 Invalid, 28 Unknown, 0 Unchecked, 0.70ms Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 30.23ms Time] [2021-11-12 23:00:21,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22065 states. [2021-11-12 23:00:24,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22065 to 21031. [2021-11-12 23:00:24,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21031 states, 21030 states have (on average 1.442035187826914) internal successors, (30326), 21030 states have internal predecessors, (30326), 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) [2021-11-12 23:00:24,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21031 states to 21031 states and 30326 transitions. [2021-11-12 23:00:24,332 INFO L78 Accepts]: Start accepts. Automaton has 21031 states and 30326 transitions. Word has length 80 [2021-11-12 23:00:24,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:00:24,332 INFO L470 AbstractCegarLoop]: Abstraction has 21031 states and 30326 transitions. [2021-11-12 23:00:24,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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) [2021-11-12 23:00:24,333 INFO L276 IsEmpty]: Start isEmpty. Operand 21031 states and 30326 transitions. [2021-11-12 23:00:24,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-12 23:00:24,336 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:00:24,336 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:00:24,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-11-12 23:00:24,337 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:00:24,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:00:24,337 INFO L85 PathProgramCache]: Analyzing trace with hash -242197279, now seen corresponding path program 1 times [2021-11-12 23:00:24,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:00:24,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034971258] [2021-11-12 23:00:24,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:24,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:00:24,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:24,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:00:24,385 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:00:24,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034971258] [2021-11-12 23:00:24,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034971258] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:00:24,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:00:24,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:00:24,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970296548] [2021-11-12 23:00:24,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:00:24,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:00:24,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:00:24,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:00:24,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:00:24,388 INFO L87 Difference]: Start difference. First operand 21031 states and 30326 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2021-11-12 23:00:28,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:00:28,253 INFO L93 Difference]: Finished difference Result 36131 states and 52540 transitions. [2021-11-12 23:00:28,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:00:28,254 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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 83 [2021-11-12 23:00:28,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:00:28,295 INFO L225 Difference]: With dead ends: 36131 [2021-11-12 23:00:28,295 INFO L226 Difference]: Without dead ends: 26593 [2021-11-12 23:00:28,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:00:28,309 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 92 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.82ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.90ms IncrementalHoareTripleChecker+Time [2021-11-12 23:00:28,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 390 Invalid, 28 Unknown, 0 Unchecked, 0.82ms Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 34.90ms Time] [2021-11-12 23:00:28,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26593 states. [2021-11-12 23:00:31,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26593 to 25151. [2021-11-12 23:00:31,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25151 states, 25150 states have (on average 1.441510934393638) internal successors, (36254), 25150 states have internal predecessors, (36254), 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) [2021-11-12 23:00:32,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25151 states to 25151 states and 36254 transitions. [2021-11-12 23:00:32,040 INFO L78 Accepts]: Start accepts. Automaton has 25151 states and 36254 transitions. Word has length 83 [2021-11-12 23:00:32,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:00:32,041 INFO L470 AbstractCegarLoop]: Abstraction has 25151 states and 36254 transitions. [2021-11-12 23:00:32,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2021-11-12 23:00:32,041 INFO L276 IsEmpty]: Start isEmpty. Operand 25151 states and 36254 transitions. [2021-11-12 23:00:32,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-12 23:00:32,044 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:00:32,044 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:00:32,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-11-12 23:00:32,045 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:00:32,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:00:32,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1502616025, now seen corresponding path program 1 times [2021-11-12 23:00:32,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:00:32,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922932449] [2021-11-12 23:00:32,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:32,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:00:32,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:32,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:00:32,083 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:00:32,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922932449] [2021-11-12 23:00:32,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922932449] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:00:32,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:00:32,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:00:32,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985466507] [2021-11-12 23:00:32,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:00:32,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:00:32,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:00:32,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:00:32,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:00:32,085 INFO L87 Difference]: Start difference. First operand 25151 states and 36254 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2021-11-12 23:00:36,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:00:36,889 INFO L93 Difference]: Finished difference Result 46659 states and 67746 transitions. [2021-11-12 23:00:36,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:00:36,890 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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 86 [2021-11-12 23:00:36,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:00:36,945 INFO L225 Difference]: With dead ends: 46659 [2021-11-12 23:00:36,945 INFO L226 Difference]: Without dead ends: 33225 [2021-11-12 23:00:36,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:00:36,962 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 87 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.71ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.97ms IncrementalHoareTripleChecker+Time [2021-11-12 23:00:36,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 371 Invalid, 29 Unknown, 0 Unchecked, 0.71ms Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 30.97ms Time] [2021-11-12 23:00:36,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33225 states. [2021-11-12 23:00:41,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33225 to 31111. [2021-11-12 23:00:41,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31111 states, 31110 states have (on average 1.438637094181935) internal successors, (44756), 31110 states have internal predecessors, (44756), 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) [2021-11-12 23:00:41,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31111 states to 31111 states and 44756 transitions. [2021-11-12 23:00:41,698 INFO L78 Accepts]: Start accepts. Automaton has 31111 states and 44756 transitions. Word has length 86 [2021-11-12 23:00:41,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:00:41,698 INFO L470 AbstractCegarLoop]: Abstraction has 31111 states and 44756 transitions. [2021-11-12 23:00:41,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2021-11-12 23:00:41,698 INFO L276 IsEmpty]: Start isEmpty. Operand 31111 states and 44756 transitions. [2021-11-12 23:00:41,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-12 23:00:41,701 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:00:41,702 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:00:41,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-11-12 23:00:41,702 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:00:41,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:00:41,703 INFO L85 PathProgramCache]: Analyzing trace with hash -626574003, now seen corresponding path program 1 times [2021-11-12 23:00:41,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:00:41,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786786643] [2021-11-12 23:00:41,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:41,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:00:41,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:41,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:00:41,749 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:00:41,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786786643] [2021-11-12 23:00:41,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786786643] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:00:41,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:00:41,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:00:41,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938419933] [2021-11-12 23:00:41,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:00:41,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:00:41,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:00:41,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:00:41,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:00:41,751 INFO L87 Difference]: Start difference. First operand 31111 states and 44756 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2021-11-12 23:00:48,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:00:48,249 INFO L93 Difference]: Finished difference Result 64545 states and 93322 transitions. [2021-11-12 23:00:48,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:00:48,250 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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 89 [2021-11-12 23:00:48,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:00:48,318 INFO L225 Difference]: With dead ends: 64545 [2021-11-12 23:00:48,318 INFO L226 Difference]: Without dead ends: 43375 [2021-11-12 23:00:48,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:00:48,335 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 82 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.74ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.45ms IncrementalHoareTripleChecker+Time [2021-11-12 23:00:48,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 352 Invalid, 30 Unknown, 0 Unchecked, 0.74ms Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 31.45ms Time] [2021-11-12 23:00:48,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43375 states. [2021-11-12 23:00:54,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43375 to 40217. [2021-11-12 23:00:54,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40217 states, 40216 states have (on average 1.4326636164710562) internal successors, (57616), 40216 states have internal predecessors, (57616), 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) [2021-11-12 23:00:54,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40217 states to 40217 states and 57616 transitions. [2021-11-12 23:00:54,784 INFO L78 Accepts]: Start accepts. Automaton has 40217 states and 57616 transitions. Word has length 89 [2021-11-12 23:00:54,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:00:54,785 INFO L470 AbstractCegarLoop]: Abstraction has 40217 states and 57616 transitions. [2021-11-12 23:00:54,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2021-11-12 23:00:54,785 INFO L276 IsEmpty]: Start isEmpty. Operand 40217 states and 57616 transitions. [2021-11-12 23:00:54,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-12 23:00:54,791 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:00:54,791 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:00:54,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-11-12 23:00:54,792 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:00:54,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:00:54,792 INFO L85 PathProgramCache]: Analyzing trace with hash 153940077, now seen corresponding path program 1 times [2021-11-12 23:00:54,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:00:54,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712360354] [2021-11-12 23:00:54,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:54,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:00:54,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:54,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:00:54,839 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:00:54,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712360354] [2021-11-12 23:00:54,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712360354] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:00:54,839 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:00:54,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:00:54,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329550493] [2021-11-12 23:00:54,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:00:54,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:00:54,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:00:54,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:00:54,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:00:54,841 INFO L87 Difference]: Start difference. First operand 40217 states and 57616 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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) [2021-11-12 23:01:04,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:01:04,310 INFO L93 Difference]: Finished difference Result 94535 states and 135810 transitions. [2021-11-12 23:01:04,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:01:04,310 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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 92 [2021-11-12 23:01:04,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:01:04,416 INFO L225 Difference]: With dead ends: 94535 [2021-11-12 23:01:04,417 INFO L226 Difference]: Without dead ends: 58635 [2021-11-12 23:01:04,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:01:04,449 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 79 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.78ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.81ms IncrementalHoareTripleChecker+Time [2021-11-12 23:01:04,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 353 Invalid, 28 Unknown, 0 Unchecked, 0.78ms Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 32.81ms Time] [2021-11-12 23:01:04,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58635 states. [2021-11-12 23:01:13,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58635 to 54739. [2021-11-12 23:01:13,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54739 states, 54738 states have (on average 1.425919836311155) internal successors, (78052), 54738 states have internal predecessors, (78052), 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) [2021-11-12 23:01:13,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54739 states to 54739 states and 78052 transitions. [2021-11-12 23:01:13,387 INFO L78 Accepts]: Start accepts. Automaton has 54739 states and 78052 transitions. Word has length 92 [2021-11-12 23:01:13,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:01:13,388 INFO L470 AbstractCegarLoop]: Abstraction has 54739 states and 78052 transitions. [2021-11-12 23:01:13,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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) [2021-11-12 23:01:13,388 INFO L276 IsEmpty]: Start isEmpty. Operand 54739 states and 78052 transitions. [2021-11-12 23:01:13,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-12 23:01:13,394 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:01:13,395 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:01:13,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-11-12 23:01:13,395 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:01:13,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:01:13,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1221733174, now seen corresponding path program 1 times [2021-11-12 23:01:13,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:01:13,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926838250] [2021-11-12 23:01:13,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:01:13,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:01:13,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:01:13,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:01:13,438 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:01:13,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926838250] [2021-11-12 23:01:13,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926838250] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:01:13,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:01:13,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:01:13,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413620107] [2021-11-12 23:01:13,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:01:13,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:01:13,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:01:13,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:01:13,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:01:13,439 INFO L87 Difference]: Start difference. First operand 54739 states and 78052 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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)