./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.13.cil.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_12ea744a-891d-4142-8aa1-1b9efa1566d7/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ea744a-891d-4142-8aa1-1b9efa1566d7/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_12ea744a-891d-4142-8aa1-1b9efa1566d7/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ea744a-891d-4142-8aa1-1b9efa1566d7/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.13.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ea744a-891d-4142-8aa1-1b9efa1566d7/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_12ea744a-891d-4142-8aa1-1b9efa1566d7/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 5975f0f3825b3a6653676f33bd69d14e1e58fcf0306bfb5508ab91dc8951d6c4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:55:15,751 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:55:15,753 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:55:15,814 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:55:15,815 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:55:15,820 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:55:15,822 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:55:15,827 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:55:15,829 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:55:15,837 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:55:15,838 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:55:15,840 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:55:15,840 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:55:15,843 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:55:15,846 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:55:15,851 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:55:15,855 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:55:15,858 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:55:15,860 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:55:15,864 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:55:15,869 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:55:15,870 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:55:15,874 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:55:15,875 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:55:15,881 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:55:15,882 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:55:15,882 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:55:15,885 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:55:15,885 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:55:15,887 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:55:15,887 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:55:15,888 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:55:15,890 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:55:15,891 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:55:15,893 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:55:15,893 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:55:15,894 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:55:15,894 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:55:15,895 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:55:15,895 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:55:15,896 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:55:15,897 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ea744a-891d-4142-8aa1-1b9efa1566d7/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:55:15,938 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:55:15,941 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:55:15,942 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:55:15,943 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:55:15,943 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:55:15,943 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:55:15,943 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:55:15,944 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:55:15,944 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:55:15,944 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:55:15,945 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:55:15,945 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:55:15,946 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:55:15,946 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:55:15,946 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:55:15,946 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:55:15,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:55:15,947 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:55:15,947 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:55:15,948 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:55:15,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:55:15,948 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:55:15,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:55:15,949 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:55:15,949 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:55:15,949 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:55:15,949 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:55:15,950 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:55:15,950 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:55:15,952 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:55:15,952 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:55:15,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:55:15,953 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:55:15,953 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:55:15,953 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:55:15,953 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:55:15,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:55:15,954 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:55:15,954 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:55:15,954 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:55:15,955 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_12ea744a-891d-4142-8aa1-1b9efa1566d7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ea744a-891d-4142-8aa1-1b9efa1566d7/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5975f0f3825b3a6653676f33bd69d14e1e58fcf0306bfb5508ab91dc8951d6c4 [2021-11-12 22:55:16,196 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:55:16,216 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:55:16,219 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:55:16,220 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:55:16,221 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:55:16,222 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ea744a-891d-4142-8aa1-1b9efa1566d7/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/systemc/transmitter.13.cil.c [2021-11-12 22:55:16,353 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ea744a-891d-4142-8aa1-1b9efa1566d7/bin/utaipan-vmNK8stdcF/data/8571e8caf/c10f92f05bcf44f8a8addb6b9580947b/FLAG45324eac7 [2021-11-12 22:55:16,921 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:55:16,922 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ea744a-891d-4142-8aa1-1b9efa1566d7/sv-benchmarks/c/systemc/transmitter.13.cil.c [2021-11-12 22:55:16,958 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ea744a-891d-4142-8aa1-1b9efa1566d7/bin/utaipan-vmNK8stdcF/data/8571e8caf/c10f92f05bcf44f8a8addb6b9580947b/FLAG45324eac7 [2021-11-12 22:55:17,184 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ea744a-891d-4142-8aa1-1b9efa1566d7/bin/utaipan-vmNK8stdcF/data/8571e8caf/c10f92f05bcf44f8a8addb6b9580947b [2021-11-12 22:55:17,188 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:55:17,191 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:55:17,197 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:55:17,198 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:55:17,201 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:55:17,202 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:55:17" (1/1) ... [2021-11-12 22:55:17,203 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7033782b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:55:17, skipping insertion in model container [2021-11-12 22:55:17,204 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:55:17" (1/1) ... [2021-11-12 22:55:17,211 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:55:17,266 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:55:17,402 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_12ea744a-891d-4142-8aa1-1b9efa1566d7/sv-benchmarks/c/systemc/transmitter.13.cil.c[706,719] [2021-11-12 22:55:17,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:55:17,580 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:55:17,592 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_12ea744a-891d-4142-8aa1-1b9efa1566d7/sv-benchmarks/c/systemc/transmitter.13.cil.c[706,719] [2021-11-12 22:55:17,667 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:55:17,696 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:55:17,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:55:17 WrapperNode [2021-11-12 22:55:17,697 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:55:17,698 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:55:17,699 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:55:17,699 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:55:17,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:55:17" (1/1) ... [2021-11-12 22:55:17,723 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:55:17" (1/1) ... [2021-11-12 22:55:17,800 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:55:17,800 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:55:17,801 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:55:17,801 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:55:17,822 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:55:17" (1/1) ... [2021-11-12 22:55:17,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:55:17" (1/1) ... [2021-11-12 22:55:17,834 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:55:17" (1/1) ... [2021-11-12 22:55:17,834 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:55:17" (1/1) ... [2021-11-12 22:55:17,868 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:55:17" (1/1) ... [2021-11-12 22:55:17,883 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:55:17" (1/1) ... [2021-11-12 22:55:17,886 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:55:17" (1/1) ... [2021-11-12 22:55:17,892 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:55:17,893 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:55:17,893 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:55:17,893 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:55:17,894 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:55:17" (1/1) ... [2021-11-12 22:55:17,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:55:17,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ea744a-891d-4142-8aa1-1b9efa1566d7/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:55:17,935 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ea744a-891d-4142-8aa1-1b9efa1566d7/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:55:17,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ea744a-891d-4142-8aa1-1b9efa1566d7/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:55:17,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:55:17,982 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-12 22:55:17,983 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-12 22:55:17,983 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-12 22:55:17,983 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-12 22:55:17,983 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-12 22:55:17,983 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-12 22:55:17,983 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-12 22:55:17,984 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-12 22:55:17,984 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-12 22:55:17,984 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-12 22:55:17,984 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-12 22:55:17,984 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-12 22:55:17,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 22:55:17,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:55:17,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:55:19,632 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:55:19,633 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-11-12 22:55:19,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:55:19 BoogieIcfgContainer [2021-11-12 22:55:19,637 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:55:19,641 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:55:19,641 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:55:19,647 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:55:19,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:55:17" (1/3) ... [2021-11-12 22:55:19,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e545678 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:55:19, skipping insertion in model container [2021-11-12 22:55:19,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:55:17" (2/3) ... [2021-11-12 22:55:19,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e545678 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:55:19, skipping insertion in model container [2021-11-12 22:55:19,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:55:19" (3/3) ... [2021-11-12 22:55:19,650 INFO L111 eAbstractionObserver]: Analyzing ICFG transmitter.13.cil.c [2021-11-12 22:55:19,659 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:55:19,659 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:55:19,729 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:55:19,741 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 22:55:19,742 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:55:19,780 INFO L276 IsEmpty]: Start isEmpty. Operand has 197 states, 163 states have (on average 1.5644171779141105) internal successors, (255), 165 states have internal predecessors, (255), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-12 22:55:19,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-12 22:55:19,795 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:19,796 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:19,796 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:19,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:19,802 INFO L85 PathProgramCache]: Analyzing trace with hash -383573431, now seen corresponding path program 1 times [2021-11-12 22:55:19,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:55:19,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95559851] [2021-11-12 22:55:19,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:19,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:55:20,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:20,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:20,386 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:55:20,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95559851] [2021-11-12 22:55:20,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95559851] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:20,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:20,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:55:20,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465775038] [2021-11-12 22:55:20,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:20,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:55:20,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:55:20,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:55:20,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:55:20,436 INFO L87 Difference]: Start difference. First operand has 197 states, 163 states have (on average 1.5644171779141105) internal successors, (255), 165 states have internal predecessors, (255), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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 22:55:21,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:21,016 INFO L93 Difference]: Finished difference Result 574 states and 925 transitions. [2021-11-12 22:55:21,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:55:21,019 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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 81 [2021-11-12 22:55:21,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:21,046 INFO L225 Difference]: With dead ends: 574 [2021-11-12 22:55:21,047 INFO L226 Difference]: Without dead ends: 378 [2021-11-12 22:55:21,057 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 22:55:21,062 INFO L933 BasicCegarLoop]: 474 mSDtfsCounter, 532 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 318.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 854 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.84ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 400.95ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:21,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [532 Valid, 854 Invalid, 320 Unknown, 0 Unchecked, 24.84ms Time], IncrementalHoareTripleChecker [14 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 400.95ms Time] [2021-11-12 22:55:21,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-11-12 22:55:21,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 375. [2021-11-12 22:55:21,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 315 states have (on average 1.5238095238095237) internal successors, (480), 316 states have internal predecessors, (480), 47 states have call successors, (47), 12 states have call predecessors, (47), 12 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2021-11-12 22:55:21,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 574 transitions. [2021-11-12 22:55:21,163 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 574 transitions. Word has length 81 [2021-11-12 22:55:21,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:21,163 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 574 transitions. [2021-11-12 22:55:21,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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 22:55:21,164 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 574 transitions. [2021-11-12 22:55:21,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-12 22:55:21,169 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:21,170 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:21,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 22:55:21,170 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:21,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:21,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1956072650, now seen corresponding path program 1 times [2021-11-12 22:55:21,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:55:21,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387592624] [2021-11-12 22:55:21,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:21,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:55:21,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:21,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:21,310 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:55:21,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387592624] [2021-11-12 22:55:21,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387592624] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:21,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:21,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-12 22:55:21,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775033693] [2021-11-12 22:55:21,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:21,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:55:21,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:55:21,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:55:21,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:55:21,317 INFO L87 Difference]: Start difference. First operand 375 states and 574 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 22:55:22,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:22,118 INFO L93 Difference]: Finished difference Result 1287 states and 1995 transitions. [2021-11-12 22:55:22,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:55:22,119 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 81 [2021-11-12 22:55:22,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:22,128 INFO L225 Difference]: With dead ends: 1287 [2021-11-12 22:55:22,129 INFO L226 Difference]: Without dead ends: 890 [2021-11-12 22:55:22,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:55:22,141 INFO L933 BasicCegarLoop]: 507 mSDtfsCounter, 1136 mSDsluCounter, 1044 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 531.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1150 SdHoareTripleChecker+Valid, 1362 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.16ms SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 649.01ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:22,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1150 Valid, 1362 Invalid, 715 Unknown, 0 Unchecked, 17.16ms Time], IncrementalHoareTripleChecker [210 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 649.01ms Time] [2021-11-12 22:55:22,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2021-11-12 22:55:22,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 878. [2021-11-12 22:55:22,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 757 states have (on average 1.513870541611625) internal successors, (1146), 746 states have internal predecessors, (1146), 92 states have call successors, (92), 26 states have call predecessors, (92), 28 states have return successors, (106), 106 states have call predecessors, (106), 92 states have call successors, (106) [2021-11-12 22:55:22,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1344 transitions. [2021-11-12 22:55:22,249 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1344 transitions. Word has length 81 [2021-11-12 22:55:22,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:22,250 INFO L470 AbstractCegarLoop]: Abstraction has 878 states and 1344 transitions. [2021-11-12 22:55:22,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 22:55:22,256 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1344 transitions. [2021-11-12 22:55:22,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-12 22:55:22,268 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:22,268 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:22,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-12 22:55:22,269 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:22,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:22,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1961251829, now seen corresponding path program 1 times [2021-11-12 22:55:22,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:55:22,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393977148] [2021-11-12 22:55:22,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:22,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:55:22,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:22,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:22,412 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:55:22,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393977148] [2021-11-12 22:55:22,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393977148] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:22,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:22,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-12 22:55:22,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269887354] [2021-11-12 22:55:22,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:22,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:55:22,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:55:22,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:55:22,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:55:22,416 INFO L87 Difference]: Start difference. First operand 878 states and 1344 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 22:55:23,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:23,054 INFO L93 Difference]: Finished difference Result 3089 states and 4796 transitions. [2021-11-12 22:55:23,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:55:23,055 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 81 [2021-11-12 22:55:23,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:23,071 INFO L225 Difference]: With dead ends: 3089 [2021-11-12 22:55:23,071 INFO L226 Difference]: Without dead ends: 2165 [2021-11-12 22:55:23,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:55:23,077 INFO L933 BasicCegarLoop]: 501 mSDtfsCounter, 1136 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 415.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1150 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.07ms SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 497.64ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:23,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1150 Valid, 1124 Invalid, 659 Unknown, 0 Unchecked, 11.07ms Time], IncrementalHoareTripleChecker [210 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 497.64ms Time] [2021-11-12 22:55:23,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2165 states. [2021-11-12 22:55:23,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2165 to 1681. [2021-11-12 22:55:23,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1681 states, 1452 states have (on average 1.5151515151515151) internal successors, (2200), 1442 states have internal predecessors, (2200), 172 states have call successors, (172), 50 states have call predecessors, (172), 56 states have return successors, (213), 189 states have call predecessors, (213), 172 states have call successors, (213) [2021-11-12 22:55:23,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1681 states to 1681 states and 2585 transitions. [2021-11-12 22:55:23,218 INFO L78 Accepts]: Start accepts. Automaton has 1681 states and 2585 transitions. Word has length 81 [2021-11-12 22:55:23,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:23,219 INFO L470 AbstractCegarLoop]: Abstraction has 1681 states and 2585 transitions. [2021-11-12 22:55:23,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 22:55:23,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1681 states and 2585 transitions. [2021-11-12 22:55:23,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-12 22:55:23,222 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:23,222 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:23,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-12 22:55:23,223 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:23,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:23,224 INFO L85 PathProgramCache]: Analyzing trace with hash -141525910, now seen corresponding path program 1 times [2021-11-12 22:55:23,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:55:23,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077467547] [2021-11-12 22:55:23,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:23,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:55:23,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:23,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:23,308 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:55:23,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077467547] [2021-11-12 22:55:23,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077467547] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:23,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:23,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-12 22:55:23,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738102929] [2021-11-12 22:55:23,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:23,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:55:23,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:55:23,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:55:23,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:55:23,312 INFO L87 Difference]: Start difference. First operand 1681 states and 2585 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 22:55:24,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:24,014 INFO L93 Difference]: Finished difference Result 5846 states and 9147 transitions. [2021-11-12 22:55:24,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:55:24,015 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 81 [2021-11-12 22:55:24,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:24,046 INFO L225 Difference]: With dead ends: 5846 [2021-11-12 22:55:24,046 INFO L226 Difference]: Without dead ends: 4072 [2021-11-12 22:55:24,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:55:24,056 INFO L933 BasicCegarLoop]: 501 mSDtfsCounter, 1136 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 420.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1150 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.92ms SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 499.84ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:24,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1150 Valid, 1124 Invalid, 659 Unknown, 0 Unchecked, 9.92ms Time], IncrementalHoareTripleChecker [210 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 499.84ms Time] [2021-11-12 22:55:24,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4072 states. [2021-11-12 22:55:24,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4072 to 3261. [2021-11-12 22:55:24,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3261 states, 2820 states have (on average 1.5148936170212766) internal successors, (4272), 2814 states have internal predecessors, (4272), 328 states have call successors, (328), 98 states have call predecessors, (328), 112 states have return successors, (421), 349 states have call predecessors, (421), 328 states have call successors, (421) [2021-11-12 22:55:24,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3261 states to 3261 states and 5021 transitions. [2021-11-12 22:55:24,268 INFO L78 Accepts]: Start accepts. Automaton has 3261 states and 5021 transitions. Word has length 81 [2021-11-12 22:55:24,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:24,268 INFO L470 AbstractCegarLoop]: Abstraction has 3261 states and 5021 transitions. [2021-11-12 22:55:24,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 22:55:24,269 INFO L276 IsEmpty]: Start isEmpty. Operand 3261 states and 5021 transitions. [2021-11-12 22:55:24,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-12 22:55:24,271 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:24,271 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:24,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-12 22:55:24,272 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:24,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:24,272 INFO L85 PathProgramCache]: Analyzing trace with hash -133775351, now seen corresponding path program 1 times [2021-11-12 22:55:24,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:55:24,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073443514] [2021-11-12 22:55:24,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:24,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:55:24,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:24,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:24,366 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:55:24,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073443514] [2021-11-12 22:55:24,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073443514] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:24,367 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:24,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:55:24,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447531798] [2021-11-12 22:55:24,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:24,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:55:24,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:55:24,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:55:24,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:55:24,369 INFO L87 Difference]: Start difference. First operand 3261 states and 5021 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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 22:55:24,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:24,987 INFO L93 Difference]: Finished difference Result 9716 states and 15238 transitions. [2021-11-12 22:55:24,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:55:24,988 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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 81 [2021-11-12 22:55:24,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:25,033 INFO L225 Difference]: With dead ends: 9716 [2021-11-12 22:55:25,033 INFO L226 Difference]: Without dead ends: 6460 [2021-11-12 22:55:25,047 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 22:55:25,048 INFO L933 BasicCegarLoop]: 473 mSDtfsCounter, 553 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 238.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.39ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 285.86ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:25,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 852 Invalid, 313 Unknown, 0 Unchecked, 5.39ms Time], IncrementalHoareTripleChecker [5 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 285.86ms Time] [2021-11-12 22:55:25,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6460 states. [2021-11-12 22:55:25,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6460 to 6440. [2021-11-12 22:55:25,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6440 states, 5579 states have (on average 1.5063631475174764) internal successors, (8404), 5567 states have internal predecessors, (8404), 636 states have call successors, (636), 196 states have call predecessors, (636), 224 states have return successors, (815), 677 states have call predecessors, (815), 636 states have call successors, (815) [2021-11-12 22:55:25,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6440 states to 6440 states and 9855 transitions. [2021-11-12 22:55:25,491 INFO L78 Accepts]: Start accepts. Automaton has 6440 states and 9855 transitions. Word has length 81 [2021-11-12 22:55:25,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:25,491 INFO L470 AbstractCegarLoop]: Abstraction has 6440 states and 9855 transitions. [2021-11-12 22:55:25,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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 22:55:25,492 INFO L276 IsEmpty]: Start isEmpty. Operand 6440 states and 9855 transitions. [2021-11-12 22:55:25,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-12 22:55:25,495 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:25,495 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:25,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-12 22:55:25,496 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:25,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:25,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1864112408, now seen corresponding path program 1 times [2021-11-12 22:55:25,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:55:25,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303632261] [2021-11-12 22:55:25,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:25,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:55:25,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:25,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:25,579 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:55:25,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303632261] [2021-11-12 22:55:25,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303632261] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:25,579 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:25,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-12 22:55:25,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630392001] [2021-11-12 22:55:25,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:25,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:55:25,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:55:25,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:55:25,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:55:25,582 INFO L87 Difference]: Start difference. First operand 6440 states and 9855 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 22:55:26,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:26,779 INFO L93 Difference]: Finished difference Result 21898 states and 34178 transitions. [2021-11-12 22:55:26,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:55:26,780 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 81 [2021-11-12 22:55:26,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:26,908 INFO L225 Difference]: With dead ends: 21898 [2021-11-12 22:55:26,909 INFO L226 Difference]: Without dead ends: 15091 [2021-11-12 22:55:26,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:55:26,950 INFO L933 BasicCegarLoop]: 501 mSDtfsCounter, 1136 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 444.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1150 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.78ms SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 524.56ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:26,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1150 Valid, 1124 Invalid, 659 Unknown, 0 Unchecked, 9.78ms Time], IncrementalHoareTripleChecker [210 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 524.56ms Time] [2021-11-12 22:55:26,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15091 states. [2021-11-12 22:55:27,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15091 to 12593. [2021-11-12 22:55:27,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12593 states, 10916 states have (on average 1.5044888237449616) internal successors, (16423), 10920 states have internal predecessors, (16423), 1228 states have call successors, (1228), 388 states have call predecessors, (1228), 448 states have return successors, (1599), 1285 states have call predecessors, (1599), 1228 states have call successors, (1599) [2021-11-12 22:55:27,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12593 states to 12593 states and 19250 transitions. [2021-11-12 22:55:27,852 INFO L78 Accepts]: Start accepts. Automaton has 12593 states and 19250 transitions. Word has length 81 [2021-11-12 22:55:27,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:27,853 INFO L470 AbstractCegarLoop]: Abstraction has 12593 states and 19250 transitions. [2021-11-12 22:55:27,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 22:55:27,854 INFO L276 IsEmpty]: Start isEmpty. Operand 12593 states and 19250 transitions. [2021-11-12 22:55:27,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-12 22:55:27,857 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:27,857 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:27,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-12 22:55:27,857 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:27,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:27,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1155752199, now seen corresponding path program 1 times [2021-11-12 22:55:27,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:55:27,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226660210] [2021-11-12 22:55:27,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:27,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:55:27,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:27,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:27,973 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:55:27,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226660210] [2021-11-12 22:55:27,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226660210] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:27,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:27,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-12 22:55:27,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145603620] [2021-11-12 22:55:27,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:27,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:55:27,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:55:27,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:55:27,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:55:27,975 INFO L87 Difference]: Start difference. First operand 12593 states and 19250 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 22:55:29,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:29,732 INFO L93 Difference]: Finished difference Result 42245 states and 65931 transitions. [2021-11-12 22:55:29,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:55:29,732 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 81 [2021-11-12 22:55:29,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:29,958 INFO L225 Difference]: With dead ends: 42245 [2021-11-12 22:55:29,958 INFO L226 Difference]: Without dead ends: 28933 [2021-11-12 22:55:30,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:55:30,015 INFO L933 BasicCegarLoop]: 501 mSDtfsCounter, 1136 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 400.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1150 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.67ms SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 491.22ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:30,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1150 Valid, 1124 Invalid, 659 Unknown, 0 Unchecked, 9.67ms Time], IncrementalHoareTripleChecker [210 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 491.22ms Time] [2021-11-12 22:55:30,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28933 states. [2021-11-12 22:55:31,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28933 to 24755. [2021-11-12 22:55:31,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24755 states, 21478 states have (on average 1.5020486078778286) internal successors, (32261), 21514 states have internal predecessors, (32261), 2380 states have call successors, (2380), 772 states have call predecessors, (2380), 896 states have return successors, (3119), 2469 states have call predecessors, (3119), 2380 states have call successors, (3119) [2021-11-12 22:55:31,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24755 states to 24755 states and 37760 transitions. [2021-11-12 22:55:31,577 INFO L78 Accepts]: Start accepts. Automaton has 24755 states and 37760 transitions. Word has length 81 [2021-11-12 22:55:31,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:31,578 INFO L470 AbstractCegarLoop]: Abstraction has 24755 states and 37760 transitions. [2021-11-12 22:55:31,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 22:55:31,579 INFO L276 IsEmpty]: Start isEmpty. Operand 24755 states and 37760 transitions. [2021-11-12 22:55:31,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-12 22:55:31,581 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:31,581 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:31,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-12 22:55:31,582 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:31,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:31,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1679072870, now seen corresponding path program 1 times [2021-11-12 22:55:31,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:55:31,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706992438] [2021-11-12 22:55:31,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:31,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:55:31,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:31,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:31,678 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:55:31,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706992438] [2021-11-12 22:55:31,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706992438] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:31,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:31,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-12 22:55:31,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706122386] [2021-11-12 22:55:31,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:31,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:55:31,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:55:31,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:55:31,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:55:31,680 INFO L87 Difference]: Start difference. First operand 24755 states and 37760 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 22:55:34,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:34,570 INFO L93 Difference]: Finished difference Result 82435 states and 128417 transitions. [2021-11-12 22:55:34,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:55:34,571 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 81 [2021-11-12 22:55:34,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:34,911 INFO L225 Difference]: With dead ends: 82435 [2021-11-12 22:55:34,911 INFO L226 Difference]: Without dead ends: 56273 [2021-11-12 22:55:35,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:55:35,014 INFO L933 BasicCegarLoop]: 501 mSDtfsCounter, 1136 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 410.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1150 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.18ms SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 518.56ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:35,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1150 Valid, 1124 Invalid, 659 Unknown, 0 Unchecked, 13.18ms Time], IncrementalHoareTripleChecker [210 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 518.56ms Time] [2021-11-12 22:55:35,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56273 states. [2021-11-12 22:55:37,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56273 to 48815. [2021-11-12 22:55:37,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48815 states, 42402 states have (on average 1.4992924862034809) internal successors, (63573), 42502 states have internal predecessors, (63573), 4620 states have call successors, (4620), 1540 states have call predecessors, (4620), 1792 states have return successors, (6063), 4773 states have call predecessors, (6063), 4620 states have call successors, (6063) [2021-11-12 22:55:37,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48815 states to 48815 states and 74256 transitions. [2021-11-12 22:55:37,683 INFO L78 Accepts]: Start accepts. Automaton has 48815 states and 74256 transitions. Word has length 81 [2021-11-12 22:55:37,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:37,684 INFO L470 AbstractCegarLoop]: Abstraction has 48815 states and 74256 transitions. [2021-11-12 22:55:37,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 22:55:37,685 INFO L276 IsEmpty]: Start isEmpty. Operand 48815 states and 74256 transitions. [2021-11-12 22:55:37,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-12 22:55:37,687 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:37,688 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:37,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-12 22:55:37,688 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:37,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:37,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1564445337, now seen corresponding path program 1 times [2021-11-12 22:55:37,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:55:37,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469116892] [2021-11-12 22:55:37,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:37,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:55:37,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:37,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:37,840 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:55:37,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469116892] [2021-11-12 22:55:37,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469116892] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:37,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:37,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 22:55:37,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450517675] [2021-11-12 22:55:37,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:37,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:55:37,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:55:37,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:55:37,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:55:37,844 INFO L87 Difference]: Start difference. First operand 48815 states and 74256 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 2 states have call successors, (5), 2 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 22:55:41,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:41,792 INFO L93 Difference]: Finished difference Result 155527 states and 236681 transitions. [2021-11-12 22:55:41,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:55:41,802 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 2 states have call successors, (5), 2 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 81 [2021-11-12 22:55:41,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:42,327 INFO L225 Difference]: With dead ends: 155527 [2021-11-12 22:55:42,327 INFO L226 Difference]: Without dead ends: 106718 [2021-11-12 22:55:42,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 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 22:55:42,653 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 1167 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 530.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1174 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.33ms SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 732.22ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:42,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1174 Valid, 765 Invalid, 461 Unknown, 0 Unchecked, 8.33ms Time], IncrementalHoareTripleChecker [161 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 732.22ms Time] [2021-11-12 22:55:42,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106718 states. [2021-11-12 22:55:46,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106718 to 82832. [2021-11-12 22:55:46,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82832 states, 72763 states have (on average 1.4851366766076166) internal successors, (108063), 72962 states have internal predecessors, (108063), 6996 states have call successors, (6996), 2568 states have call predecessors, (6996), 3072 states have return successors, (9882), 7302 states have call predecessors, (9882), 6996 states have call successors, (9882) [2021-11-12 22:55:47,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82832 states to 82832 states and 124941 transitions. [2021-11-12 22:55:47,165 INFO L78 Accepts]: Start accepts. Automaton has 82832 states and 124941 transitions. Word has length 81 [2021-11-12 22:55:47,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:47,166 INFO L470 AbstractCegarLoop]: Abstraction has 82832 states and 124941 transitions. [2021-11-12 22:55:47,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 2 states have call successors, (5), 2 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 22:55:47,167 INFO L276 IsEmpty]: Start isEmpty. Operand 82832 states and 124941 transitions. [2021-11-12 22:55:47,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-12 22:55:47,174 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:47,175 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:47,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-12 22:55:47,175 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:47,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:47,176 INFO L85 PathProgramCache]: Analyzing trace with hash 727492203, now seen corresponding path program 1 times [2021-11-12 22:55:47,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:55:47,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148984832] [2021-11-12 22:55:47,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:47,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:55:47,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:47,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:47,299 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:55:47,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148984832] [2021-11-12 22:55:47,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148984832] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:47,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:47,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 22:55:47,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751352925] [2021-11-12 22:55:47,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:47,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:55:47,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:55:47,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:55:47,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:55:47,301 INFO L87 Difference]: Start difference. First operand 82832 states and 124941 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 2 states have call successors, (5), 2 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 22:55:55,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:55,154 INFO L93 Difference]: Finished difference Result 316200 states and 476578 transitions. [2021-11-12 22:55:55,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:55:55,155 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 2 states have call successors, (5), 2 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 82 [2021-11-12 22:55:55,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:56,084 INFO L225 Difference]: With dead ends: 316200 [2021-11-12 22:55:56,085 INFO L226 Difference]: Without dead ends: 233374 [2021-11-12 22:55:56,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 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 22:55:56,286 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 1226 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 326.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1247 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.67ms SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 412.78ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:56,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1247 Valid, 727 Invalid, 459 Unknown, 0 Unchecked, 7.67ms Time], IncrementalHoareTripleChecker [161 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 412.78ms Time] [2021-11-12 22:55:56,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233374 states. [2021-11-12 22:56:03,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233374 to 163332. [2021-11-12 22:56:03,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163332 states, 143583 states have (on average 1.4809204432279588) internal successors, (212635), 143984 states have internal predecessors, (212635), 13604 states have call successors, (13604), 5136 states have call predecessors, (13604), 6144 states have return successors, (19124), 14212 states have call predecessors, (19124), 13604 states have call successors, (19124) [2021-11-12 22:56:04,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163332 states to 163332 states and 245363 transitions. [2021-11-12 22:56:04,803 INFO L78 Accepts]: Start accepts. Automaton has 163332 states and 245363 transitions. Word has length 82 [2021-11-12 22:56:04,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:04,805 INFO L470 AbstractCegarLoop]: Abstraction has 163332 states and 245363 transitions. [2021-11-12 22:56:04,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 2 states have call successors, (5), 2 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 22:56:04,805 INFO L276 IsEmpty]: Start isEmpty. Operand 163332 states and 245363 transitions. [2021-11-12 22:56:04,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-12 22:56:04,810 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:04,811 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:04,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-12 22:56:04,811 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:04,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:04,812 INFO L85 PathProgramCache]: Analyzing trace with hash 490185776, now seen corresponding path program 1 times [2021-11-12 22:56:04,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:56:04,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044861891] [2021-11-12 22:56:04,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:04,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:56:04,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:04,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:56:04,926 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:56:04,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044861891] [2021-11-12 22:56:04,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044861891] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:04,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:04,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 22:56:04,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638855801] [2021-11-12 22:56:04,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:04,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:56:04,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:56:04,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:56:04,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:56:04,929 INFO L87 Difference]: Start difference. First operand 163332 states and 245363 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)