./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.13.cil-2.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_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/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_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.13.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/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_346228c7-4e50-4580-b7b8-774961229b34/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 0dcd4461cca64e9ab41b6ad7ff4c6eaa4177bddcca1c612fa1571b77ac664a95 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:07:38,777 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:07:38,780 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:07:38,833 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:07:38,833 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:07:38,837 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:07:38,839 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:07:38,842 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:07:38,845 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:07:38,850 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:07:38,852 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:07:38,853 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:07:38,854 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:07:38,856 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:07:38,858 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:07:38,862 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:07:38,864 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:07:38,865 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:07:38,867 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:07:38,874 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:07:38,876 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:07:38,877 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:07:38,880 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:07:38,881 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:07:38,887 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:07:38,887 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:07:38,887 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:07:38,888 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:07:38,889 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:07:38,889 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:07:38,890 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:07:38,890 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:07:38,891 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:07:38,892 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:07:38,893 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:07:38,893 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:07:38,893 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:07:38,893 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:07:38,894 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:07:38,894 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:07:38,895 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:07:38,896 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:07:38,918 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:07:38,918 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:07:38,919 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:07:38,919 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:07:38,919 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:07:38,919 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:07:38,920 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:07:38,920 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:07:38,920 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:07:38,920 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:07:38,920 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:07:38,921 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:07:38,921 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:07:38,921 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:07:38,921 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:07:38,921 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:07:38,922 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:07:38,922 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:07:38,922 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:07:38,923 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:07:38,923 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:07:38,923 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:07:38,923 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:07:38,923 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:07:38,923 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:07:38,924 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:07:38,924 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:07:38,924 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:07:38,924 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:07:38,924 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:07:38,925 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:07:38,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:07:38,925 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:07:38,925 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:07:38,925 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:07:38,926 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:07:38,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:07:38,926 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:07:38,926 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:07:38,926 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:07:38,927 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_346228c7-4e50-4580-b7b8-774961229b34/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0dcd4461cca64e9ab41b6ad7ff4c6eaa4177bddcca1c612fa1571b77ac664a95 [2021-11-12 23:07:39,204 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:07:39,232 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:07:39,236 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:07:39,237 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:07:39,238 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:07:39,239 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/systemc/token_ring.13.cil-2.c [2021-11-12 23:07:39,318 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/data/5bb5d1d3c/76d4368d66fd4318b9015f97e5b872e5/FLAG9959d305a [2021-11-12 23:07:39,903 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:07:39,904 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/sv-benchmarks/c/systemc/token_ring.13.cil-2.c [2021-11-12 23:07:39,919 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/data/5bb5d1d3c/76d4368d66fd4318b9015f97e5b872e5/FLAG9959d305a [2021-11-12 23:07:40,322 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/data/5bb5d1d3c/76d4368d66fd4318b9015f97e5b872e5 [2021-11-12 23:07:40,325 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:07:40,326 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:07:40,342 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:07:40,342 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:07:40,345 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:07:40,346 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:07:40" (1/1) ... [2021-11-12 23:07:40,347 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d318d95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:40, skipping insertion in model container [2021-11-12 23:07:40,347 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:07:40" (1/1) ... [2021-11-12 23:07:40,354 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:07:40,402 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:07:40,578 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_346228c7-4e50-4580-b7b8-774961229b34/sv-benchmarks/c/systemc/token_ring.13.cil-2.c[671,684] [2021-11-12 23:07:40,718 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:07:40,728 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:07:40,740 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_346228c7-4e50-4580-b7b8-774961229b34/sv-benchmarks/c/systemc/token_ring.13.cil-2.c[671,684] [2021-11-12 23:07:40,836 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:07:40,861 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:07:40,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:40 WrapperNode [2021-11-12 23:07:40,862 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:07:40,863 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:07:40,863 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:07:40,863 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:07:40,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:40" (1/1) ... [2021-11-12 23:07:40,891 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:40" (1/1) ... [2021-11-12 23:07:40,953 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:07:40,953 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:07:40,954 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:07:40,954 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:07:40,962 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:40" (1/1) ... [2021-11-12 23:07:40,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:40" (1/1) ... [2021-11-12 23:07:40,968 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:40" (1/1) ... [2021-11-12 23:07:40,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:40" (1/1) ... [2021-11-12 23:07:41,003 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:40" (1/1) ... [2021-11-12 23:07:41,039 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:40" (1/1) ... [2021-11-12 23:07:41,042 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:40" (1/1) ... [2021-11-12 23:07:41,053 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:07:41,054 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:07:41,054 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:07:41,054 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:07:41,055 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:40" (1/1) ... [2021-11-12 23:07:41,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:07:41,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:07:41,115 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:07:41,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:07:41,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:07:41,166 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-12 23:07:41,167 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-12 23:07:41,167 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-12 23:07:41,167 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-12 23:07:41,167 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-12 23:07:41,167 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-12 23:07:41,167 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-12 23:07:41,168 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-12 23:07:41,168 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-12 23:07:41,168 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-12 23:07:41,168 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-12 23:07:41,168 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-12 23:07:41,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 23:07:41,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:07:41,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:07:42,701 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:07:42,701 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2021-11-12 23:07:42,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:07:42 BoogieIcfgContainer [2021-11-12 23:07:42,705 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:07:42,707 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:07:42,707 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:07:42,710 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:07:42,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:07:40" (1/3) ... [2021-11-12 23:07:42,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19517bcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:07:42, skipping insertion in model container [2021-11-12 23:07:42,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:40" (2/3) ... [2021-11-12 23:07:42,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19517bcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:07:42, skipping insertion in model container [2021-11-12 23:07:42,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:07:42" (3/3) ... [2021-11-12 23:07:42,713 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.13.cil-2.c [2021-11-12 23:07:42,718 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:07:42,718 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:07:42,806 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:07:42,818 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 23:07:42,818 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:07:42,854 INFO L276 IsEmpty]: Start isEmpty. Operand has 199 states, 164 states have (on average 1.5609756097560976) internal successors, (256), 166 states have internal predecessors, (256), 27 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-12 23:07:42,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-12 23:07:42,866 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:42,867 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 23:07:42,868 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:42,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:42,873 INFO L85 PathProgramCache]: Analyzing trace with hash 784490566, now seen corresponding path program 1 times [2021-11-12 23:07:42,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:42,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646617297] [2021-11-12 23:07:42,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:42,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:43,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:43,364 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 23:07:43,364 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:43,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646617297] [2021-11-12 23:07:43,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646617297] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:43,367 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:43,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:07:43,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477882075] [2021-11-12 23:07:43,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:43,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:07:43,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:43,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:07:43,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:43,412 INFO L87 Difference]: Start difference. First operand has 199 states, 164 states have (on average 1.5609756097560976) internal successors, (256), 166 states have internal predecessors, (256), 27 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 23:07:44,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:44,052 INFO L93 Difference]: Finished difference Result 580 states and 938 transitions. [2021-11-12 23:07:44,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:07:44,054 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2021-11-12 23:07:44,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:44,080 INFO L225 Difference]: With dead ends: 580 [2021-11-12 23:07:44,080 INFO L226 Difference]: Without dead ends: 382 [2021-11-12 23:07:44,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:44,094 INFO L933 BasicCegarLoop]: 484 mSDtfsCounter, 541 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 382.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.04ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 485.09ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:44,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 866 Invalid, 325 Unknown, 0 Unchecked, 18.04ms Time], IncrementalHoareTripleChecker [13 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 485.09ms Time] [2021-11-12 23:07:44,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-11-12 23:07:44,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 381. [2021-11-12 23:07:44,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 318 states have (on average 1.5220125786163523) internal successors, (484), 320 states have internal predecessors, (484), 50 states have call successors, (50), 12 states have call predecessors, (50), 12 states have return successors, (50), 49 states have call predecessors, (50), 50 states have call successors, (50) [2021-11-12 23:07:44,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 584 transitions. [2021-11-12 23:07:44,205 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 584 transitions. Word has length 69 [2021-11-12 23:07:44,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:44,205 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 584 transitions. [2021-11-12 23:07:44,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 23:07:44,206 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 584 transitions. [2021-11-12 23:07:44,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-12 23:07:44,216 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:44,217 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:44,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 23:07:44,218 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:44,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:44,219 INFO L85 PathProgramCache]: Analyzing trace with hash -300169029, now seen corresponding path program 1 times [2021-11-12 23:07:44,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:44,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633817030] [2021-11-12 23:07:44,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:44,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:44,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:44,394 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:07:44,394 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:44,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633817030] [2021-11-12 23:07:44,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633817030] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:07:44,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835854816] [2021-11-12 23:07:44,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:44,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:07:44,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:07:44,398 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:07:44,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-12 23:07:44,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:44,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 1062 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:07:44,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:45,039 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:07:45,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:45,322 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-12 23:07:45,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835854816] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:07:45,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:07:45,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-12 23:07:45,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962407845] [2021-11-12 23:07:45,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:45,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:07:45,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:45,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:07:45,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:07:45,335 INFO L87 Difference]: Start difference. First operand 381 states and 584 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:07:45,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:45,563 INFO L93 Difference]: Finished difference Result 1126 states and 1757 transitions. [2021-11-12 23:07:45,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:07:45,564 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 142 [2021-11-12 23:07:45,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:45,580 INFO L225 Difference]: With dead ends: 1126 [2021-11-12 23:07:45,580 INFO L226 Difference]: Without dead ends: 750 [2021-11-12 23:07:45,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 281 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:07:45,584 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 258 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 132.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.40ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 163.07ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:45,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 545 Invalid, 111 Unknown, 0 Unchecked, 7.40ms Time], IncrementalHoareTripleChecker [2 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 163.07ms Time] [2021-11-12 23:07:45,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2021-11-12 23:07:45,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 746. [2021-11-12 23:07:45,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 627 states have (on average 1.5199362041467304) internal successors, (953), 630 states have internal predecessors, (953), 94 states have call successors, (94), 24 states have call predecessors, (94), 24 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-12 23:07:45,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1141 transitions. [2021-11-12 23:07:45,676 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1141 transitions. Word has length 142 [2021-11-12 23:07:45,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:45,678 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 1141 transitions. [2021-11-12 23:07:45,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:07:45,679 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1141 transitions. [2021-11-12 23:07:45,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-12 23:07:45,692 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:45,692 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:45,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:45,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:07:45,918 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:45,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:45,918 INFO L85 PathProgramCache]: Analyzing trace with hash -886186819, now seen corresponding path program 1 times [2021-11-12 23:07:45,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:45,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253609341] [2021-11-12 23:07:45,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:45,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:45,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:46,019 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:07:46,019 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:46,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253609341] [2021-11-12 23:07:46,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253609341] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:07:46,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263074838] [2021-11-12 23:07:46,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:46,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:07:46,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:07:46,021 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:07:46,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-12 23:07:46,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:46,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:07:46,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:46,486 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:07:46,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:46,712 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-12 23:07:46,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263074838] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:07:46,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:07:46,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-12 23:07:46,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358071050] [2021-11-12 23:07:46,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:46,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:07:46,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:46,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:07:46,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:07:46,717 INFO L87 Difference]: Start difference. First operand 746 states and 1141 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:07:46,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:46,914 INFO L93 Difference]: Finished difference Result 2215 states and 3448 transitions. [2021-11-12 23:07:46,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:07:46,915 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 142 [2021-11-12 23:07:46,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:46,926 INFO L225 Difference]: With dead ends: 2215 [2021-11-12 23:07:46,926 INFO L226 Difference]: Without dead ends: 1474 [2021-11-12 23:07:46,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 281 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:07:46,931 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 270 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 107.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.41ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 127.57ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:46,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 533 Invalid, 108 Unknown, 0 Unchecked, 3.41ms Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 127.57ms Time] [2021-11-12 23:07:46,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2021-11-12 23:07:47,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1468. [2021-11-12 23:07:47,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1239 states have (on average 1.516545601291364) internal successors, (1879), 1244 states have internal predecessors, (1879), 180 states have call successors, (180), 48 states have call predecessors, (180), 48 states have return successors, (180), 176 states have call predecessors, (180), 180 states have call successors, (180) [2021-11-12 23:07:47,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 2239 transitions. [2021-11-12 23:07:47,021 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 2239 transitions. Word has length 142 [2021-11-12 23:07:47,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:47,021 INFO L470 AbstractCegarLoop]: Abstraction has 1468 states and 2239 transitions. [2021-11-12 23:07:47,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:07:47,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 2239 transitions. [2021-11-12 23:07:47,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-12 23:07:47,028 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:47,028 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:47,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:47,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-12 23:07:47,242 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:47,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:47,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1228407361, now seen corresponding path program 1 times [2021-11-12 23:07:47,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:47,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359505932] [2021-11-12 23:07:47,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:47,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:47,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:47,349 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:07:47,349 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:47,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359505932] [2021-11-12 23:07:47,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359505932] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:07:47,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396901809] [2021-11-12 23:07:47,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:47,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:07:47,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:07:47,358 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:07:47,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-12 23:07:47,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:47,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:07:47,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:47,842 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:07:47,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:48,080 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-12 23:07:48,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396901809] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:07:48,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:07:48,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-12 23:07:48,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051496658] [2021-11-12 23:07:48,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:48,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:07:48,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:48,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:07:48,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:07:48,085 INFO L87 Difference]: Start difference. First operand 1468 states and 2239 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:07:48,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:48,320 INFO L93 Difference]: Finished difference Result 4369 states and 6780 transitions. [2021-11-12 23:07:48,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:07:48,320 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 142 [2021-11-12 23:07:48,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:48,344 INFO L225 Difference]: With dead ends: 4369 [2021-11-12 23:07:48,347 INFO L226 Difference]: Without dead ends: 2906 [2021-11-12 23:07:48,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 281 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:07:48,360 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 252 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 85.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.05ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 103.24ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:48,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 511 Invalid, 108 Unknown, 0 Unchecked, 5.05ms Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 103.24ms Time] [2021-11-12 23:07:48,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2906 states. [2021-11-12 23:07:48,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2906 to 2896. [2021-11-12 23:07:48,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2896 states, 2451 states have (on average 1.5124439004487964) internal successors, (3707), 2460 states have internal predecessors, (3707), 348 states have call successors, (348), 96 states have call predecessors, (348), 96 states have return successors, (348), 340 states have call predecessors, (348), 348 states have call successors, (348) [2021-11-12 23:07:48,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2896 states to 2896 states and 4403 transitions. [2021-11-12 23:07:48,596 INFO L78 Accepts]: Start accepts. Automaton has 2896 states and 4403 transitions. Word has length 142 [2021-11-12 23:07:48,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:48,596 INFO L470 AbstractCegarLoop]: Abstraction has 2896 states and 4403 transitions. [2021-11-12 23:07:48,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:07:48,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2896 states and 4403 transitions. [2021-11-12 23:07:48,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-12 23:07:48,606 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:48,606 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:48,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:48,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:07:48,822 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:48,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:48,822 INFO L85 PathProgramCache]: Analyzing trace with hash -935103, now seen corresponding path program 1 times [2021-11-12 23:07:48,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:48,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134528697] [2021-11-12 23:07:48,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:48,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:48,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:48,914 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:07:48,914 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:48,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134528697] [2021-11-12 23:07:48,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134528697] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:07:48,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208432641] [2021-11-12 23:07:48,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:48,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:07:48,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:07:48,922 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:07:48,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-12 23:07:49,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:49,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:07:49,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:49,389 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:07:49,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:49,619 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 23:07:49,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208432641] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:07:49,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:07:49,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-12 23:07:49,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951576540] [2021-11-12 23:07:49,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:49,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:07:49,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:49,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:07:49,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:07:49,622 INFO L87 Difference]: Start difference. First operand 2896 states and 4403 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:07:49,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:49,977 INFO L93 Difference]: Finished difference Result 8629 states and 13344 transitions. [2021-11-12 23:07:49,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:07:49,978 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 142 [2021-11-12 23:07:49,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:50,016 INFO L225 Difference]: With dead ends: 8629 [2021-11-12 23:07:50,017 INFO L226 Difference]: Without dead ends: 5738 [2021-11-12 23:07:50,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 281 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:07:50,031 INFO L933 BasicCegarLoop]: 291 mSDtfsCounter, 279 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 85.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.71ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 103.23ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:50,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 531 Invalid, 108 Unknown, 0 Unchecked, 2.71ms Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 103.23ms Time] [2021-11-12 23:07:50,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5738 states. [2021-11-12 23:07:50,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5738 to 5720. [2021-11-12 23:07:50,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5720 states, 4851 states have (on average 1.507936507936508) internal successors, (7315), 4868 states have internal predecessors, (7315), 676 states have call successors, (676), 192 states have call predecessors, (676), 192 states have return successors, (676), 660 states have call predecessors, (676), 676 states have call successors, (676) [2021-11-12 23:07:50,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5720 states to 5720 states and 8667 transitions. [2021-11-12 23:07:50,386 INFO L78 Accepts]: Start accepts. Automaton has 5720 states and 8667 transitions. Word has length 142 [2021-11-12 23:07:50,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:50,386 INFO L470 AbstractCegarLoop]: Abstraction has 5720 states and 8667 transitions. [2021-11-12 23:07:50,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:07:50,387 INFO L276 IsEmpty]: Start isEmpty. Operand 5720 states and 8667 transitions. [2021-11-12 23:07:50,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-12 23:07:50,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:50,401 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:50,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:50,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:07:50,617 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:50,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:50,617 INFO L85 PathProgramCache]: Analyzing trace with hash -507536257, now seen corresponding path program 1 times [2021-11-12 23:07:50,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:50,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803120675] [2021-11-12 23:07:50,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:50,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:50,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:50,694 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:07:50,694 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:50,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803120675] [2021-11-12 23:07:50,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803120675] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:07:50,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398281817] [2021-11-12 23:07:50,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:50,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:07:50,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:07:50,696 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:07:50,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-12 23:07:50,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:50,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:07:50,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:51,204 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-12 23:07:51,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:51,507 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 23:07:51,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398281817] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:07:51,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:07:51,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-12 23:07:51,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612265525] [2021-11-12 23:07:51,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:51,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:07:51,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:51,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:07:51,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:07:51,510 INFO L87 Difference]: Start difference. First operand 5720 states and 8667 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:07:52,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:52,077 INFO L93 Difference]: Finished difference Result 17053 states and 26272 transitions. [2021-11-12 23:07:52,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:07:52,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 142 [2021-11-12 23:07:52,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:52,171 INFO L225 Difference]: With dead ends: 17053 [2021-11-12 23:07:52,171 INFO L226 Difference]: Without dead ends: 11338 [2021-11-12 23:07:52,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 281 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:07:52,203 INFO L933 BasicCegarLoop]: 301 mSDtfsCounter, 276 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 135.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.26ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 160.68ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:52,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 541 Invalid, 111 Unknown, 0 Unchecked, 3.26ms Time], IncrementalHoareTripleChecker [2 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 160.68ms Time] [2021-11-12 23:07:52,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11338 states. [2021-11-12 23:07:52,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11338 to 11304. [2021-11-12 23:07:52,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11304 states, 9603 states have (on average 1.5031760908049567) internal successors, (14435), 9636 states have internal predecessors, (14435), 1316 states have call successors, (1316), 384 states have call predecessors, (1316), 384 states have return successors, (1316), 1284 states have call predecessors, (1316), 1316 states have call successors, (1316) [2021-11-12 23:07:52,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11304 states to 11304 states and 17067 transitions. [2021-11-12 23:07:52,919 INFO L78 Accepts]: Start accepts. Automaton has 11304 states and 17067 transitions. Word has length 142 [2021-11-12 23:07:52,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:52,919 INFO L470 AbstractCegarLoop]: Abstraction has 11304 states and 17067 transitions. [2021-11-12 23:07:52,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:07:52,920 INFO L276 IsEmpty]: Start isEmpty. Operand 11304 states and 17067 transitions. [2021-11-12 23:07:52,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-12 23:07:52,949 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:52,949 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:52,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:53,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:07:53,166 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:53,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:53,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1229550593, now seen corresponding path program 1 times [2021-11-12 23:07:53,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:53,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296164083] [2021-11-12 23:07:53,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:53,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:53,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:53,273 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:07:53,274 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:53,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296164083] [2021-11-12 23:07:53,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296164083] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:07:53,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172098587] [2021-11-12 23:07:53,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:53,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:07:53,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:07:53,276 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:07:53,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-12 23:07:53,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:53,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:07:53,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:53,839 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 23:07:53,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:54,069 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-12 23:07:54,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172098587] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:07:54,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:07:54,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-12 23:07:54,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779948638] [2021-11-12 23:07:54,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:54,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:07:54,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:54,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:07:54,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:07:54,072 INFO L87 Difference]: Start difference. First operand 11304 states and 17067 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:07:54,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:54,936 INFO L93 Difference]: Finished difference Result 33709 states and 51728 transitions. [2021-11-12 23:07:54,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:07:54,937 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 142 [2021-11-12 23:07:54,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:55,080 INFO L225 Difference]: With dead ends: 33709 [2021-11-12 23:07:55,081 INFO L226 Difference]: Without dead ends: 22410 [2021-11-12 23:07:55,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 281 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:07:55,134 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 264 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 87.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.88ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 107.08ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:55,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 511 Invalid, 108 Unknown, 0 Unchecked, 2.88ms Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 107.08ms Time] [2021-11-12 23:07:55,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22410 states. [2021-11-12 23:07:56,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22410 to 22344. [2021-11-12 23:07:56,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22344 states, 19011 states have (on average 1.498237862290253) internal successors, (28483), 19076 states have internal predecessors, (28483), 2564 states have call successors, (2564), 768 states have call predecessors, (2564), 768 states have return successors, (2564), 2500 states have call predecessors, (2564), 2564 states have call successors, (2564) [2021-11-12 23:07:56,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22344 states to 22344 states and 33611 transitions. [2021-11-12 23:07:56,412 INFO L78 Accepts]: Start accepts. Automaton has 22344 states and 33611 transitions. Word has length 142 [2021-11-12 23:07:56,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:56,412 INFO L470 AbstractCegarLoop]: Abstraction has 22344 states and 33611 transitions. [2021-11-12 23:07:56,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:07:56,413 INFO L276 IsEmpty]: Start isEmpty. Operand 22344 states and 33611 transitions. [2021-11-12 23:07:56,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-12 23:07:56,462 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:56,462 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:56,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:56,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-12 23:07:56,678 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:56,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:56,678 INFO L85 PathProgramCache]: Analyzing trace with hash -146211197, now seen corresponding path program 1 times [2021-11-12 23:07:56,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:56,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487960442] [2021-11-12 23:07:56,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:56,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:56,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:56,869 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:07:56,869 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:56,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487960442] [2021-11-12 23:07:56,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487960442] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:07:56,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729723378] [2021-11-12 23:07:56,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:56,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:07:56,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:07:56,874 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:07:56,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-12 23:07:57,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:57,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 1026 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:07:57,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:57,406 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 23:07:57,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:57,687 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-12 23:07:57,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729723378] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:07:57,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:07:57,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-12 23:07:57,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718829017] [2021-11-12 23:07:57,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:57,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:07:57,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:57,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:07:57,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:07:57,690 INFO L87 Difference]: Start difference. First operand 22344 states and 33611 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:07:59,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:59,200 INFO L93 Difference]: Finished difference Result 66637 states and 101840 transitions. [2021-11-12 23:07:59,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:07:59,201 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 142 [2021-11-12 23:07:59,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:59,413 INFO L225 Difference]: With dead ends: 66637 [2021-11-12 23:07:59,414 INFO L226 Difference]: Without dead ends: 44298 [2021-11-12 23:07:59,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 281 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:07:59,472 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 249 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 100.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.46ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 124.82ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:59,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 511 Invalid, 108 Unknown, 0 Unchecked, 3.46ms Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 124.82ms Time] [2021-11-12 23:07:59,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44298 states. [2021-11-12 23:08:00,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44298 to 44168. [2021-11-12 23:08:01,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44168 states, 37635 states have (on average 1.4931579646605553) internal successors, (56195), 37764 states have internal predecessors, (56195), 4996 states have call successors, (4996), 1536 states have call predecessors, (4996), 1536 states have return successors, (4996), 4868 states have call predecessors, (4996), 4996 states have call successors, (4996) [2021-11-12 23:08:01,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44168 states to 44168 states and 66187 transitions. [2021-11-12 23:08:01,439 INFO L78 Accepts]: Start accepts. Automaton has 44168 states and 66187 transitions. Word has length 142 [2021-11-12 23:08:01,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:01,440 INFO L470 AbstractCegarLoop]: Abstraction has 44168 states and 66187 transitions. [2021-11-12 23:08:01,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:08:01,440 INFO L276 IsEmpty]: Start isEmpty. Operand 44168 states and 66187 transitions. [2021-11-12 23:08:01,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-12 23:08:01,516 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:01,516 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:01,546 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-12 23:08:01,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_346228c7-4e50-4580-b7b8-774961229b34/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:08:01,730 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:01,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:01,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1555431359, now seen corresponding path program 1 times [2021-11-12 23:08:01,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:01,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616704439] [2021-11-12 23:08:01,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:01,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:01,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:01,876 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-12 23:08:01,876 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:01,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616704439] [2021-11-12 23:08:01,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616704439] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:01,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:01,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 23:08:01,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501365833] [2021-11-12 23:08:01,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:01,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:08:01,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:01,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:08:01,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:08:01,881 INFO L87 Difference]: Start difference. First operand 44168 states and 66187 transitions. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 23:08:05,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:05,232 INFO L93 Difference]: Finished difference Result 155276 states and 232462 transitions. [2021-11-12 23:08:05,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:08:05,233 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 142 [2021-11-12 23:08:05,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:06,138 INFO L225 Difference]: With dead ends: 155276 [2021-11-12 23:08:06,138 INFO L226 Difference]: Without dead ends: 111114 [2021-11-12 23:08:06,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:08:06,240 INFO L933 BasicCegarLoop]: 274 mSDtfsCounter, 1142 mSDsluCounter, 764 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 389.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1164 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.92ms SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 484.82ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:06,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1164 Valid, 905 Invalid, 548 Unknown, 0 Unchecked, 9.92ms Time], IncrementalHoareTripleChecker [152 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 484.82ms Time] [2021-11-12 23:08:06,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111114 states. [2021-11-12 23:08:09,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111114 to 86792. [2021-11-12 23:08:09,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86792 states, 73987 states have (on average 1.487869490586184) internal successors, (110083), 74244 states have internal predecessors, (110083), 9732 states have call successors, (9732), 3072 states have call predecessors, (9732), 3072 states have return successors, (9732), 9476 states have call predecessors, (9732), 9732 states have call successors, (9732) [2021-11-12 23:08:10,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86792 states to 86792 states and 129547 transitions. [2021-11-12 23:08:10,431 INFO L78 Accepts]: Start accepts. Automaton has 86792 states and 129547 transitions. Word has length 142 [2021-11-12 23:08:10,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:10,433 INFO L470 AbstractCegarLoop]: Abstraction has 86792 states and 129547 transitions. [2021-11-12 23:08:10,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 23:08:10,434 INFO L276 IsEmpty]: Start isEmpty. Operand 86792 states and 129547 transitions. [2021-11-12 23:08:10,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-12 23:08:10,545 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:10,546 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:10,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-12 23:08:10,546 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:10,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:10,547 INFO L85 PathProgramCache]: Analyzing trace with hash -877198779, now seen corresponding path program 1 times [2021-11-12 23:08:10,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:10,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810775649] [2021-11-12 23:08:10,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:10,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:10,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:10,691 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-12 23:08:10,692 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:10,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810775649] [2021-11-12 23:08:10,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810775649] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:10,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:10,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 23:08:10,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557162966] [2021-11-12 23:08:10,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:10,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:08:10,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:10,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:08:10,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:08:10,694 INFO L87 Difference]: Start difference. First operand 86792 states and 129547 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 23:08:15,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:15,955 INFO L93 Difference]: Finished difference Result 238476 states and 356493 transitions. [2021-11-12 23:08:15,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:08:15,956 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 143 [2021-11-12 23:08:15,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:16,766 INFO L225 Difference]: With dead ends: 238476 [2021-11-12 23:08:16,766 INFO L226 Difference]: Without dead ends: 151690 [2021-11-12 23:08:17,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:08:17,066 INFO L933 BasicCegarLoop]: 266 mSDtfsCounter, 1067 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 319.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1073 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.30ms SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 405.73ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:17,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1073 Valid, 821 Invalid, 472 Unknown, 0 Unchecked, 7.30ms Time], IncrementalHoareTripleChecker [160 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 405.73ms Time] [2021-11-12 23:08:17,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151690 states. [2021-11-12 23:08:22,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151690 to 129160. [2021-11-12 23:08:22,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129160 states, 110083 states have (on average 1.4837077477903038) internal successors, (163331), 110468 states have internal predecessors, (163331), 14468 states have call successors, (14468), 4608 states have call predecessors, (14468), 4608 states have return successors, (14468), 14084 states have call predecessors, (14468), 14468 states have call successors, (14468) [2021-11-12 23:08:23,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129160 states to 129160 states and 192267 transitions. [2021-11-12 23:08:23,495 INFO L78 Accepts]: Start accepts. Automaton has 129160 states and 192267 transitions. Word has length 143 [2021-11-12 23:08:23,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:23,495 INFO L470 AbstractCegarLoop]: Abstraction has 129160 states and 192267 transitions. [2021-11-12 23:08:23,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 23:08:23,496 INFO L276 IsEmpty]: Start isEmpty. Operand 129160 states and 192267 transitions. [2021-11-12 23:08:23,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-12 23:08:23,683 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:23,683 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:23,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-12 23:08:23,683 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:23,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:23,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1602615867, now seen corresponding path program 1 times [2021-11-12 23:08:23,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:23,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860678816] [2021-11-12 23:08:23,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:23,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:23,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:23,841 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-12 23:08:23,841 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:23,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860678816] [2021-11-12 23:08:23,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860678816] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:23,842 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:23,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 23:08:23,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572032518] [2021-11-12 23:08:23,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:23,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:08:23,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:23,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:08:23,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:08:23,844 INFO L87 Difference]: Start difference. First operand 129160 states and 192267 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 23:08:32,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:32,757 INFO L93 Difference]: Finished difference Result 352460 states and 526093 transitions. [2021-11-12 23:08:32,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:08:32,758 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 144 [2021-11-12 23:08:32,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:33,655 INFO L225 Difference]: With dead ends: 352460 [2021-11-12 23:08:33,655 INFO L226 Difference]: Without dead ends: 223306 [2021-11-12 23:08:34,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:08:34,354 INFO L933 BasicCegarLoop]: 266 mSDtfsCounter, 984 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 394.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 990 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.99ms SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 480.93ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:34,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [990 Valid, 1000 Invalid, 565 Unknown, 0 Unchecked, 10.99ms Time], IncrementalHoareTripleChecker [160 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 480.93ms Time] [2021-11-12 23:08:34,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223306 states.