./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/kundu1.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5bed83-10bd-45c2-ac0d-a04893d090ee/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5bed83-10bd-45c2-ac0d-a04893d090ee/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5bed83-10bd-45c2-ac0d-a04893d090ee/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5bed83-10bd-45c2-ac0d-a04893d090ee/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/kundu1.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5bed83-10bd-45c2-ac0d-a04893d090ee/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5bed83-10bd-45c2-ac0d-a04893d090ee/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c114a15ea6b1c9b012290758a6a9559b9c02a944706c9768958a3bd9c86822a7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:22:23,708 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:22:23,712 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:22:23,769 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:22:23,770 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:22:23,776 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:22:23,780 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:22:23,784 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:22:23,787 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:22:23,795 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:22:23,796 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:22:23,798 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:22:23,798 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:22:23,801 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:22:23,803 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:22:23,806 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:22:23,808 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:22:23,809 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:22:23,814 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:22:23,824 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:22:23,826 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:22:23,827 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:22:23,831 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:22:23,832 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:22:23,836 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:22:23,836 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:22:23,837 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:22:23,839 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:22:23,839 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:22:23,841 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:22:23,841 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:22:23,842 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:22:23,844 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:22:23,845 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:22:23,847 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:22:23,847 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:22:23,848 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:22:23,848 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:22:23,848 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:22:23,849 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:22:23,850 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:22:23,851 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5bed83-10bd-45c2-ac0d-a04893d090ee/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:22:23,882 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:22:23,882 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:22:23,883 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:22:23,883 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:22:23,884 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:22:23,884 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:22:23,884 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:22:23,884 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:22:23,884 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:22:23,885 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:22:23,885 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:22:23,885 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:22:23,885 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:22:23,886 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:22:23,886 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:22:23,887 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:22:23,887 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:22:23,887 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:22:23,888 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:22:23,888 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:22:23,888 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:22:23,888 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:22:23,888 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:22:23,889 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:22:23,889 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:22:23,889 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:22:23,889 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:22:23,890 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:22:23,890 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:22:23,890 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:22:23,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:22:23,891 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:22:23,891 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:22:23,891 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:22:23,892 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:22:23,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:22:23,892 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:22:23,892 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:22:23,892 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:22:23,893 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_0c5bed83-10bd-45c2-ac0d-a04893d090ee/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5bed83-10bd-45c2-ac0d-a04893d090ee/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c114a15ea6b1c9b012290758a6a9559b9c02a944706c9768958a3bd9c86822a7 [2021-11-07 01:22:24,183 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:22:24,223 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:22:24,226 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:22:24,227 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:22:24,228 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:22:24,229 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5bed83-10bd-45c2-ac0d-a04893d090ee/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/systemc/kundu1.cil.c [2021-11-07 01:22:24,322 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5bed83-10bd-45c2-ac0d-a04893d090ee/bin/utaipan-UUZaoUuFF8/data/2ab7fb8f5/ee82fd6cc84f4b00b1e52ec82a98058b/FLAGc533e9d60 [2021-11-07 01:22:24,816 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:22:24,817 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5bed83-10bd-45c2-ac0d-a04893d090ee/sv-benchmarks/c/systemc/kundu1.cil.c [2021-11-07 01:22:24,826 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5bed83-10bd-45c2-ac0d-a04893d090ee/bin/utaipan-UUZaoUuFF8/data/2ab7fb8f5/ee82fd6cc84f4b00b1e52ec82a98058b/FLAGc533e9d60 [2021-11-07 01:22:25,286 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5bed83-10bd-45c2-ac0d-a04893d090ee/bin/utaipan-UUZaoUuFF8/data/2ab7fb8f5/ee82fd6cc84f4b00b1e52ec82a98058b [2021-11-07 01:22:25,288 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:22:25,290 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:22:25,295 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:22:25,295 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:22:25,298 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:22:25,299 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:22:25" (1/1) ... [2021-11-07 01:22:25,300 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dcc67d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:25, skipping insertion in model container [2021-11-07 01:22:25,300 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:22:25" (1/1) ... [2021-11-07 01:22:25,308 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:22:25,336 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:22:25,497 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_0c5bed83-10bd-45c2-ac0d-a04893d090ee/sv-benchmarks/c/systemc/kundu1.cil.c[636,649] [2021-11-07 01:22:25,579 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:22:25,596 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:22:25,613 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_0c5bed83-10bd-45c2-ac0d-a04893d090ee/sv-benchmarks/c/systemc/kundu1.cil.c[636,649] [2021-11-07 01:22:25,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:22:25,687 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:22:25,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:25 WrapperNode [2021-11-07 01:22:25,688 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:22:25,689 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:22:25,690 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:22:25,690 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:22:25,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:25" (1/1) ... [2021-11-07 01:22:25,706 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:25" (1/1) ... [2021-11-07 01:22:25,737 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:22:25,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:22:25,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:22:25,738 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:22:25,747 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:25" (1/1) ... [2021-11-07 01:22:25,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:25" (1/1) ... [2021-11-07 01:22:25,751 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:25" (1/1) ... [2021-11-07 01:22:25,751 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:25" (1/1) ... [2021-11-07 01:22:25,759 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:25" (1/1) ... [2021-11-07 01:22:25,766 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:25" (1/1) ... [2021-11-07 01:22:25,768 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:25" (1/1) ... [2021-11-07 01:22:25,772 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:22:25,773 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:22:25,774 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:22:25,774 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:22:25,775 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:25" (1/1) ... [2021-11-07 01:22:25,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:22:25,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5bed83-10bd-45c2-ac0d-a04893d090ee/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:22:25,814 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5bed83-10bd-45c2-ac0d-a04893d090ee/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:22:25,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5bed83-10bd-45c2-ac0d-a04893d090ee/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:22:25,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:22:25,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 01:22:25,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:22:25,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:22:26,828 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:22:26,828 INFO L299 CfgBuilder]: Removed 72 assume(true) statements. [2021-11-07 01:22:26,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:22:26 BoogieIcfgContainer [2021-11-07 01:22:26,831 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:22:26,835 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:22:26,835 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:22:26,838 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:22:26,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:22:25" (1/3) ... [2021-11-07 01:22:26,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a0af45a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:22:26, skipping insertion in model container [2021-11-07 01:22:26,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:25" (2/3) ... [2021-11-07 01:22:26,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a0af45a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:22:26, skipping insertion in model container [2021-11-07 01:22:26,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:22:26" (3/3) ... [2021-11-07 01:22:26,842 INFO L111 eAbstractionObserver]: Analyzing ICFG kundu1.cil.c [2021-11-07 01:22:26,851 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:22:26,851 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-07 01:22:26,904 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:22:26,910 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:22:26,910 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-07 01:22:26,928 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 60 states have (on average 1.6666666666666667) internal successors, (100), 63 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:26,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 01:22:26,935 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:26,936 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:22:26,936 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:26,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:26,956 INFO L85 PathProgramCache]: Analyzing trace with hash -35002489, now seen corresponding path program 1 times [2021-11-07 01:22:26,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:22:26,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402156314] [2021-11-07 01:22:26,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:26,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:22:27,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:27,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:22:27,122 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:22:27,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402156314] [2021-11-07 01:22:27,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402156314] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:27,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:27,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 01:22:27,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195808527] [2021-11-07 01:22:27,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:22:27,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:22:27,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:22:27,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:22:27,146 INFO L87 Difference]: Start difference. First operand has 64 states, 60 states have (on average 1.6666666666666667) internal successors, (100), 63 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:27,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:27,236 INFO L93 Difference]: Finished difference Result 176 states and 274 transitions. [2021-11-07 01:22:27,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:22:27,238 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-07 01:22:27,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:27,253 INFO L225 Difference]: With dead ends: 176 [2021-11-07 01:22:27,253 INFO L226 Difference]: Without dead ends: 110 [2021-11-07 01:22:27,257 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:22:27,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-07 01:22:27,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 101. [2021-11-07 01:22:27,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 98 states have (on average 1.5510204081632653) internal successors, (152), 100 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:27,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 152 transitions. [2021-11-07 01:22:27,319 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 152 transitions. Word has length 16 [2021-11-07 01:22:27,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:27,320 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 152 transitions. [2021-11-07 01:22:27,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:27,320 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 152 transitions. [2021-11-07 01:22:27,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 01:22:27,321 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:27,322 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:22:27,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:22:27,322 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:27,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:27,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1105426168, now seen corresponding path program 1 times [2021-11-07 01:22:27,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:22:27,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254960058] [2021-11-07 01:22:27,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:27,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:22:27,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:27,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:22:27,403 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:22:27,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254960058] [2021-11-07 01:22:27,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254960058] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:27,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:27,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:22:27,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324151219] [2021-11-07 01:22:27,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:22:27,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:22:27,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:22:27,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:22:27,407 INFO L87 Difference]: Start difference. First operand 101 states and 152 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:27,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:27,534 INFO L93 Difference]: Finished difference Result 322 states and 476 transitions. [2021-11-07 01:22:27,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:22:27,535 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-07 01:22:27,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:27,537 INFO L225 Difference]: With dead ends: 322 [2021-11-07 01:22:27,538 INFO L226 Difference]: Without dead ends: 226 [2021-11-07 01:22:27,539 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:22:27,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-11-07 01:22:27,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 161. [2021-11-07 01:22:27,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 158 states have (on average 1.4936708860759493) internal successors, (236), 160 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:27,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 236 transitions. [2021-11-07 01:22:27,564 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 236 transitions. Word has length 16 [2021-11-07 01:22:27,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:27,565 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 236 transitions. [2021-11-07 01:22:27,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:27,565 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 236 transitions. [2021-11-07 01:22:27,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 01:22:27,566 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:27,566 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:22:27,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 01:22:27,567 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:27,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:27,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1564940830, now seen corresponding path program 1 times [2021-11-07 01:22:27,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:22:27,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521901517] [2021-11-07 01:22:27,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:27,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:22:27,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:27,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:22:27,691 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:22:27,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521901517] [2021-11-07 01:22:27,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521901517] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:27,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:27,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:22:27,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464824012] [2021-11-07 01:22:27,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:22:27,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:22:27,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:22:27,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:22:27,702 INFO L87 Difference]: Start difference. First operand 161 states and 236 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:27,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:27,792 INFO L93 Difference]: Finished difference Result 562 states and 838 transitions. [2021-11-07 01:22:27,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:22:27,793 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 01:22:27,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:27,799 INFO L225 Difference]: With dead ends: 562 [2021-11-07 01:22:27,800 INFO L226 Difference]: Without dead ends: 410 [2021-11-07 01:22:27,803 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:22:27,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-11-07 01:22:27,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 261. [2021-11-07 01:22:27,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 258 states have (on average 1.4922480620155039) internal successors, (385), 260 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:27,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 385 transitions. [2021-11-07 01:22:27,841 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 385 transitions. Word has length 17 [2021-11-07 01:22:27,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:27,841 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 385 transitions. [2021-11-07 01:22:27,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:27,842 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 385 transitions. [2021-11-07 01:22:27,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:22:27,843 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:27,843 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:22:27,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 01:22:27,844 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:27,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:27,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1153252066, now seen corresponding path program 1 times [2021-11-07 01:22:27,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:22:27,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642950566] [2021-11-07 01:22:27,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:27,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:22:27,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:27,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:22:27,940 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:22:27,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642950566] [2021-11-07 01:22:27,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642950566] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:27,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:27,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:22:27,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763482993] [2021-11-07 01:22:27,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:22:27,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:22:27,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:22:27,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:22:27,943 INFO L87 Difference]: Start difference. First operand 261 states and 385 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:28,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:28,018 INFO L93 Difference]: Finished difference Result 458 states and 680 transitions. [2021-11-07 01:22:28,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:22:28,019 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:22:28,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:28,022 INFO L225 Difference]: With dead ends: 458 [2021-11-07 01:22:28,022 INFO L226 Difference]: Without dead ends: 306 [2021-11-07 01:22:28,023 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:22:28,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-11-07 01:22:28,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 299. [2021-11-07 01:22:28,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 296 states have (on average 1.4864864864864864) internal successors, (440), 298 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:28,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 440 transitions. [2021-11-07 01:22:28,046 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 440 transitions. Word has length 24 [2021-11-07 01:22:28,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:28,047 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 440 transitions. [2021-11-07 01:22:28,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:28,047 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 440 transitions. [2021-11-07 01:22:28,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-07 01:22:28,049 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:28,049 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:22:28,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 01:22:28,050 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:28,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:28,050 INFO L85 PathProgramCache]: Analyzing trace with hash 2105930281, now seen corresponding path program 1 times [2021-11-07 01:22:28,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:22:28,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846803212] [2021-11-07 01:22:28,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:28,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:22:28,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:28,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:22:28,128 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:22:28,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846803212] [2021-11-07 01:22:28,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846803212] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:28,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:28,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:22:28,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854519248] [2021-11-07 01:22:28,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:22:28,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:22:28,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:22:28,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:22:28,134 INFO L87 Difference]: Start difference. First operand 299 states and 440 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:28,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:28,218 INFO L93 Difference]: Finished difference Result 1006 states and 1474 transitions. [2021-11-07 01:22:28,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:22:28,219 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-07 01:22:28,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:28,224 INFO L225 Difference]: With dead ends: 1006 [2021-11-07 01:22:28,224 INFO L226 Difference]: Without dead ends: 716 [2021-11-07 01:22:28,225 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:22:28,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-11-07 01:22:28,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 533. [2021-11-07 01:22:28,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 530 states have (on average 1.4641509433962263) internal successors, (776), 532 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:28,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 776 transitions. [2021-11-07 01:22:28,262 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 776 transitions. Word has length 25 [2021-11-07 01:22:28,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:28,262 INFO L470 AbstractCegarLoop]: Abstraction has 533 states and 776 transitions. [2021-11-07 01:22:28,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:28,262 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 776 transitions. [2021-11-07 01:22:28,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 01:22:28,264 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:28,265 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:22:28,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 01:22:28,265 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:28,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:28,266 INFO L85 PathProgramCache]: Analyzing trace with hash 549812478, now seen corresponding path program 1 times [2021-11-07 01:22:28,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:22:28,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031961405] [2021-11-07 01:22:28,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:28,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:22:28,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:28,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:22:28,332 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:22:28,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031961405] [2021-11-07 01:22:28,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031961405] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:28,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:28,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:22:28,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358406099] [2021-11-07 01:22:28,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:22:28,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:22:28,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:22:28,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:22:28,336 INFO L87 Difference]: Start difference. First operand 533 states and 776 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:28,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:28,468 INFO L93 Difference]: Finished difference Result 1677 states and 2430 transitions. [2021-11-07 01:22:28,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:22:28,469 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-07 01:22:28,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:28,477 INFO L225 Difference]: With dead ends: 1677 [2021-11-07 01:22:28,477 INFO L226 Difference]: Without dead ends: 1150 [2021-11-07 01:22:28,478 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:22:28,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1150 states. [2021-11-07 01:22:28,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1150 to 986. [2021-11-07 01:22:28,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 983 states have (on average 1.4252288911495423) internal successors, (1401), 985 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:28,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 1401 transitions. [2021-11-07 01:22:28,551 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 1401 transitions. Word has length 26 [2021-11-07 01:22:28,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:28,551 INFO L470 AbstractCegarLoop]: Abstraction has 986 states and 1401 transitions. [2021-11-07 01:22:28,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:28,552 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 1401 transitions. [2021-11-07 01:22:28,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 01:22:28,558 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:28,558 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:22:28,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 01:22:28,559 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:28,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:28,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1814218818, now seen corresponding path program 1 times [2021-11-07 01:22:28,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:22:28,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824663430] [2021-11-07 01:22:28,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:28,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:22:28,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:28,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:22:28,640 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:22:28,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824663430] [2021-11-07 01:22:28,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824663430] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:28,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:28,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:22:28,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206893405] [2021-11-07 01:22:28,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:22:28,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:22:28,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:22:28,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:22:28,643 INFO L87 Difference]: Start difference. First operand 986 states and 1401 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:28,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:28,852 INFO L93 Difference]: Finished difference Result 3073 states and 4314 transitions. [2021-11-07 01:22:28,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:22:28,853 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-07 01:22:28,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:28,865 INFO L225 Difference]: With dead ends: 3073 [2021-11-07 01:22:28,865 INFO L226 Difference]: Without dead ends: 2095 [2021-11-07 01:22:28,868 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:22:28,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2095 states. [2021-11-07 01:22:28,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2095 to 1622. [2021-11-07 01:22:28,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1619 states have (on average 1.3767757875231625) internal successors, (2229), 1621 states have internal predecessors, (2229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:28,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 2229 transitions. [2021-11-07 01:22:28,996 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 2229 transitions. Word has length 27 [2021-11-07 01:22:28,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:28,997 INFO L470 AbstractCegarLoop]: Abstraction has 1622 states and 2229 transitions. [2021-11-07 01:22:28,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:28,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 2229 transitions. [2021-11-07 01:22:29,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 01:22:29,000 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:29,001 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:22:29,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 01:22:29,002 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:29,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:29,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1094847912, now seen corresponding path program 1 times [2021-11-07 01:22:29,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:22:29,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768622129] [2021-11-07 01:22:29,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:29,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:22:29,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:29,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:22:29,073 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:22:29,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768622129] [2021-11-07 01:22:29,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768622129] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:29,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:29,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:22:29,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310584471] [2021-11-07 01:22:29,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:22:29,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:22:29,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:22:29,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:22:29,075 INFO L87 Difference]: Start difference. First operand 1622 states and 2229 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:29,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:29,440 INFO L93 Difference]: Finished difference Result 5310 states and 7387 transitions. [2021-11-07 01:22:29,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:22:29,441 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-07 01:22:29,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:29,468 INFO L225 Difference]: With dead ends: 5310 [2021-11-07 01:22:29,468 INFO L226 Difference]: Without dead ends: 4284 [2021-11-07 01:22:29,472 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:22:29,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4284 states. [2021-11-07 01:22:29,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4284 to 2256. [2021-11-07 01:22:29,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2253 states have (on average 1.3861517976031958) internal successors, (3123), 2255 states have internal predecessors, (3123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:29,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 3123 transitions. [2021-11-07 01:22:29,712 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 3123 transitions. Word has length 27 [2021-11-07 01:22:29,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:29,712 INFO L470 AbstractCegarLoop]: Abstraction has 2256 states and 3123 transitions. [2021-11-07 01:22:29,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:29,713 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 3123 transitions. [2021-11-07 01:22:29,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 01:22:29,715 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:29,716 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:22:29,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 01:22:29,716 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:29,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:29,717 INFO L85 PathProgramCache]: Analyzing trace with hash -293797764, now seen corresponding path program 1 times [2021-11-07 01:22:29,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:22:29,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118315406] [2021-11-07 01:22:29,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:29,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:22:29,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:29,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:22:29,803 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:22:29,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118315406] [2021-11-07 01:22:29,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118315406] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:29,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:29,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 01:22:29,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783791270] [2021-11-07 01:22:29,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:22:29,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:22:29,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:22:29,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:22:29,812 INFO L87 Difference]: Start difference. First operand 2256 states and 3123 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:29,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:29,997 INFO L93 Difference]: Finished difference Result 4690 states and 6474 transitions. [2021-11-07 01:22:29,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:22:29,998 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-07 01:22:29,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:30,011 INFO L225 Difference]: With dead ends: 4690 [2021-11-07 01:22:30,012 INFO L226 Difference]: Without dead ends: 2442 [2021-11-07 01:22:30,015 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:22:30,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2021-11-07 01:22:30,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2410. [2021-11-07 01:22:30,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2410 states, 2407 states have (on average 1.3780639800581638) internal successors, (3317), 2409 states have internal predecessors, (3317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:30,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2410 states to 2410 states and 3317 transitions. [2021-11-07 01:22:30,179 INFO L78 Accepts]: Start accepts. Automaton has 2410 states and 3317 transitions. Word has length 29 [2021-11-07 01:22:30,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:30,179 INFO L470 AbstractCegarLoop]: Abstraction has 2410 states and 3317 transitions. [2021-11-07 01:22:30,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:30,179 INFO L276 IsEmpty]: Start isEmpty. Operand 2410 states and 3317 transitions. [2021-11-07 01:22:30,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 01:22:30,180 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:30,180 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:22:30,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 01:22:30,180 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:30,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:30,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1011039886, now seen corresponding path program 1 times [2021-11-07 01:22:30,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:22:30,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319948639] [2021-11-07 01:22:30,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:30,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:22:30,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:30,215 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:22:30,215 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:22:30,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319948639] [2021-11-07 01:22:30,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319948639] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:30,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:30,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:22:30,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107246587] [2021-11-07 01:22:30,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:22:30,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:22:30,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:22:30,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:22:30,217 INFO L87 Difference]: Start difference. First operand 2410 states and 3317 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:30,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:30,463 INFO L93 Difference]: Finished difference Result 5193 states and 7179 transitions. [2021-11-07 01:22:30,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:22:30,464 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-07 01:22:30,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:30,480 INFO L225 Difference]: With dead ends: 5193 [2021-11-07 01:22:30,481 INFO L226 Difference]: Without dead ends: 2945 [2021-11-07 01:22:30,484 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:22:30,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2945 states. [2021-11-07 01:22:30,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2945 to 2555. [2021-11-07 01:22:30,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2555 states, 2552 states have (on average 1.3816614420062696) internal successors, (3526), 2554 states have internal predecessors, (3526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:30,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2555 states to 2555 states and 3526 transitions. [2021-11-07 01:22:30,689 INFO L78 Accepts]: Start accepts. Automaton has 2555 states and 3526 transitions. Word has length 29 [2021-11-07 01:22:30,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:30,689 INFO L470 AbstractCegarLoop]: Abstraction has 2555 states and 3526 transitions. [2021-11-07 01:22:30,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:30,689 INFO L276 IsEmpty]: Start isEmpty. Operand 2555 states and 3526 transitions. [2021-11-07 01:22:30,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 01:22:30,690 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:30,691 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:22:30,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 01:22:30,691 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:30,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:30,692 INFO L85 PathProgramCache]: Analyzing trace with hash 982260236, now seen corresponding path program 1 times [2021-11-07 01:22:30,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:22:30,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050556171] [2021-11-07 01:22:30,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:30,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:22:30,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:30,723 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:22:30,723 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:22:30,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050556171] [2021-11-07 01:22:30,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050556171] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:30,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:30,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:22:30,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428437712] [2021-11-07 01:22:30,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:22:30,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:22:30,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:22:30,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:22:30,725 INFO L87 Difference]: Start difference. First operand 2555 states and 3526 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:30,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:30,875 INFO L93 Difference]: Finished difference Result 4491 states and 6243 transitions. [2021-11-07 01:22:30,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:22:30,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-07 01:22:30,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:30,892 INFO L225 Difference]: With dead ends: 4491 [2021-11-07 01:22:30,892 INFO L226 Difference]: Without dead ends: 2597 [2021-11-07 01:22:30,896 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:22:30,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2597 states. [2021-11-07 01:22:31,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2597 to 2555. [2021-11-07 01:22:31,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2555 states, 2552 states have (on average 1.3377742946708464) internal successors, (3414), 2554 states have internal predecessors, (3414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:31,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2555 states to 2555 states and 3414 transitions. [2021-11-07 01:22:31,115 INFO L78 Accepts]: Start accepts. Automaton has 2555 states and 3414 transitions. Word has length 40 [2021-11-07 01:22:31,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:31,115 INFO L470 AbstractCegarLoop]: Abstraction has 2555 states and 3414 transitions. [2021-11-07 01:22:31,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:31,116 INFO L276 IsEmpty]: Start isEmpty. Operand 2555 states and 3414 transitions. [2021-11-07 01:22:31,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 01:22:31,117 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:31,117 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:22:31,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 01:22:31,117 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:31,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:31,118 INFO L85 PathProgramCache]: Analyzing trace with hash -8904437, now seen corresponding path program 1 times [2021-11-07 01:22:31,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:22:31,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205869801] [2021-11-07 01:22:31,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:31,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:22:31,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:31,154 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:22:31,154 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:22:31,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205869801] [2021-11-07 01:22:31,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205869801] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:31,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:31,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:22:31,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602078616] [2021-11-07 01:22:31,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:22:31,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:22:31,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:22:31,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:22:31,157 INFO L87 Difference]: Start difference. First operand 2555 states and 3414 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:31,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:31,371 INFO L93 Difference]: Finished difference Result 5297 states and 7072 transitions. [2021-11-07 01:22:31,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:22:31,371 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-07 01:22:31,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:31,391 INFO L225 Difference]: With dead ends: 5297 [2021-11-07 01:22:31,391 INFO L226 Difference]: Without dead ends: 3403 [2021-11-07 01:22:31,395 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:22:31,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3403 states. [2021-11-07 01:22:31,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3403 to 2555. [2021-11-07 01:22:31,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2555 states, 2552 states have (on average 1.3158307210031348) internal successors, (3358), 2554 states have internal predecessors, (3358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:31,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2555 states to 2555 states and 3358 transitions. [2021-11-07 01:22:31,589 INFO L78 Accepts]: Start accepts. Automaton has 2555 states and 3358 transitions. Word has length 40 [2021-11-07 01:22:31,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:31,589 INFO L470 AbstractCegarLoop]: Abstraction has 2555 states and 3358 transitions. [2021-11-07 01:22:31,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:31,589 INFO L276 IsEmpty]: Start isEmpty. Operand 2555 states and 3358 transitions. [2021-11-07 01:22:31,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 01:22:31,590 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:31,591 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:22:31,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 01:22:31,591 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:31,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:31,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1406893127, now seen corresponding path program 1 times [2021-11-07 01:22:31,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:22:31,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20797241] [2021-11-07 01:22:31,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:31,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:22:31,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:31,657 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:22:31,657 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:22:31,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20797241] [2021-11-07 01:22:31,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20797241] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:22:31,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390135205] [2021-11-07 01:22:31,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:31,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:22:31,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5bed83-10bd-45c2-ac0d-a04893d090ee/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:22:31,661 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5bed83-10bd-45c2-ac0d-a04893d090ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:22:31,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5bed83-10bd-45c2-ac0d-a04893d090ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 01:22:31,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:31,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:22:31,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:22:31,924 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:22:31,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:22:32,062 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:22:32,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390135205] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:22:32,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [664318050] [2021-11-07 01:22:32,085 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2021-11-07 01:22:32,085 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:22:32,089 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:22:32,095 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:22:32,095 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:22:32,171 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:22:32,186 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:22:32,187 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:22:32,188 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 01:22:32,189 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:22:32,190 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:22:32,191 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 01:22:32,199 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 199 [2021-11-07 01:22:32,224 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_21|], 21=[|v_#valid_22|]} [2021-11-07 01:22:32,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:32,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:32,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:32,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-07 01:22:32,251 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:22:32,251 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:22:32,252 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:22:32,253 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:22:32,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:22:32,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:22:32,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:22:32,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:32,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:32,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:32,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:32,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:32,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:32,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:32,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:32,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:32,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-07 01:22:32,294 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:22:32,297 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:22:32,298 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:22:32,299 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:22:32,299 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 01:22:32,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:22:32,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:22:32,314 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:22:32,318 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 145 [2021-11-07 01:22:32,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 01:22:32,319 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:170, output treesize:145 [2021-11-07 01:22:32,336 INFO L180 QuantifierPusher]: treesize reduction 4, result has 97.8 percent of original size [2021-11-07 01:22:32,342 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 175 [2021-11-07 01:22:32,374 INFO L180 QuantifierPusher]: treesize reduction 8, result has 96.3 percent of original size [2021-11-07 01:22:32,384 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 205 [2021-11-07 01:22:32,396 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:22:32,405 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 205 [2021-11-07 01:22:32,423 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:22:32,438 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 263 [2021-11-07 01:22:32,465 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:22:32,473 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 225 [2021-11-07 01:22:32,484 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:22:32,498 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 243 [2021-11-07 01:22:32,509 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:22:32,522 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 247 [2021-11-07 01:22:32,533 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:22:32,546 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 258 [2021-11-07 01:22:32,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:22:32,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:22:32,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:22:32,870 INFO L180 QuantifierPusher]: treesize reduction 8, result has 98.8 percent of original size [2021-11-07 01:22:32,892 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 612 [2021-11-07 01:22:32,913 INFO L180 QuantifierPusher]: treesize reduction 3, result has 99.5 percent of original size [2021-11-07 01:22:32,937 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 612 [2021-11-07 01:22:32,957 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:22:32,982 INFO L185 QuantifierPusher]: treesize reduction 154, result has 59.8 percent of original size 229 [2021-11-07 01:22:33,005 INFO L180 QuantifierPusher]: treesize reduction 154, result has 62.0 percent of original size [2021-11-07 01:22:33,013 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 247 [2021-11-07 01:22:33,021 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:22:33,033 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 251 [2021-11-07 01:22:33,044 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:22:33,053 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 259 [2021-11-07 01:22:33,114 INFO L180 QuantifierPusher]: treesize reduction 8, result has 98.8 percent of original size [2021-11-07 01:22:33,152 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 612 [2021-11-07 01:22:33,181 INFO L180 QuantifierPusher]: treesize reduction 8, result has 98.7 percent of original size [2021-11-07 01:22:33,197 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:22:33,206 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:22:33,249 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 388 [2021-11-07 01:22:33,251 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:22:33,261 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:22:33,305 INFO L185 QuantifierPusher]: treesize reduction 12, result has 96.8 percent of original size 366 [2021-11-07 01:22:33,307 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:22:33,334 INFO L180 QuantifierPusher]: treesize reduction 12, result has 96.9 percent of original size [2021-11-07 01:22:33,367 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 356 [2021-11-07 01:22:33,368 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:22:33,376 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:22:33,409 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 350 [2021-11-07 01:22:33,444 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 530 [2021-11-07 01:22:33,467 INFO L180 QuantifierPusher]: treesize reduction 7, result has 98.8 percent of original size [2021-11-07 01:22:33,475 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:22:33,482 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:22:33,526 INFO L185 QuantifierPusher]: treesize reduction 12, result has 96.4 percent of original size 326 [2021-11-07 01:22:33,528 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:22:33,551 INFO L180 QuantifierPusher]: treesize reduction 12, result has 96.5 percent of original size [2021-11-07 01:22:33,582 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 320 [2021-11-07 01:22:33,622 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 524 [2021-11-07 01:22:33,677 INFO L180 QuantifierPusher]: treesize reduction 8, result has 98.8 percent of original size [2021-11-07 01:22:33,698 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 612 [2021-11-07 01:22:33,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:22:33,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:22:34,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:22:34,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:22:34,437 INFO L180 QuantifierPusher]: treesize reduction 246, result has 68.9 percent of original size [2021-11-07 01:22:34,460 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 528 [2021-11-07 01:22:34,488 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:22:34,515 INFO L185 QuantifierPusher]: treesize reduction 59, result has 79.5 percent of original size 229 [2021-11-07 01:22:34,546 INFO L180 QuantifierPusher]: treesize reduction 59, result has 81.0 percent of original size [2021-11-07 01:22:34,561 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 247 [2021-11-07 01:22:34,581 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:22:34,598 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 251 [2021-11-07 01:22:34,616 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:22:34,632 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 259 [2021-11-07 01:22:34,646 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:22:41,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [664318050] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:41,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-11-07 01:22:41,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [6, 4, 4] total 22 [2021-11-07 01:22:41,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175253795] [2021-11-07 01:22:41,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 01:22:41,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:22:41,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 01:22:41,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-11-07 01:22:41,717 INFO L87 Difference]: Start difference. First operand 2555 states and 3358 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:43,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:43,563 INFO L93 Difference]: Finished difference Result 4971 states and 6555 transitions. [2021-11-07 01:22:43,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 01:22:43,564 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-07 01:22:43,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:43,578 INFO L225 Difference]: With dead ends: 4971 [2021-11-07 01:22:43,578 INFO L226 Difference]: Without dead ends: 2424 [2021-11-07 01:22:43,583 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 102 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=132, Invalid=420, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:22:43,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2424 states. [2021-11-07 01:22:43,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2424 to 2420. [2021-11-07 01:22:43,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2420 states, 2417 states have (on average 1.3231278444352503) internal successors, (3198), 2419 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:43,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2420 states to 2420 states and 3198 transitions. [2021-11-07 01:22:43,771 INFO L78 Accepts]: Start accepts. Automaton has 2420 states and 3198 transitions. Word has length 41 [2021-11-07 01:22:43,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:43,771 INFO L470 AbstractCegarLoop]: Abstraction has 2420 states and 3198 transitions. [2021-11-07 01:22:43,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:43,772 INFO L276 IsEmpty]: Start isEmpty. Operand 2420 states and 3198 transitions. [2021-11-07 01:22:43,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 01:22:43,773 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:43,773 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:22:43,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5bed83-10bd-45c2-ac0d-a04893d090ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:22:43,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5bed83-10bd-45c2-ac0d-a04893d090ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:22:43,988 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:43,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:43,989 INFO L85 PathProgramCache]: Analyzing trace with hash 518035146, now seen corresponding path program 1 times [2021-11-07 01:22:43,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:22:43,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87408933] [2021-11-07 01:22:43,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:43,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:22:44,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:44,052 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:22:44,052 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:22:44,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87408933] [2021-11-07 01:22:44,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87408933] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:44,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:44,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:22:44,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845041213] [2021-11-07 01:22:44,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:22:44,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:22:44,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:22:44,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:22:44,056 INFO L87 Difference]: Start difference. First operand 2420 states and 3198 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:44,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:44,248 INFO L93 Difference]: Finished difference Result 4855 states and 6417 transitions. [2021-11-07 01:22:44,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:22:44,249 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-07 01:22:44,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:44,275 INFO L225 Difference]: With dead ends: 4855 [2021-11-07 01:22:44,275 INFO L226 Difference]: Without dead ends: 2462 [2021-11-07 01:22:44,279 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:22:44,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2462 states. [2021-11-07 01:22:44,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2462 to 2420. [2021-11-07 01:22:44,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2420 states, 2417 states have (on average 1.3098882912701697) internal successors, (3166), 2419 states have internal predecessors, (3166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:44,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2420 states to 2420 states and 3166 transitions. [2021-11-07 01:22:44,478 INFO L78 Accepts]: Start accepts. Automaton has 2420 states and 3166 transitions. Word has length 42 [2021-11-07 01:22:44,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:44,478 INFO L470 AbstractCegarLoop]: Abstraction has 2420 states and 3166 transitions. [2021-11-07 01:22:44,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:44,479 INFO L276 IsEmpty]: Start isEmpty. Operand 2420 states and 3166 transitions. [2021-11-07 01:22:44,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 01:22:44,480 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:44,480 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:22:44,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-07 01:22:44,481 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:44,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:44,481 INFO L85 PathProgramCache]: Analyzing trace with hash -204381746, now seen corresponding path program 1 times [2021-11-07 01:22:44,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:22:44,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794146058] [2021-11-07 01:22:44,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:44,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:22:44,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:44,548 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:22:44,548 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:22:44,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794146058] [2021-11-07 01:22:44,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794146058] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:22:44,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116526609] [2021-11-07 01:22:44,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:44,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:22:44,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5bed83-10bd-45c2-ac0d-a04893d090ee/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:22:44,550 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5bed83-10bd-45c2-ac0d-a04893d090ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:22:44,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5bed83-10bd-45c2-ac0d-a04893d090ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 01:22:44,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:44,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:22:44,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:22:44,778 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:22:44,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:22:44,891 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:22:44,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116526609] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:44,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:22:44,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [4] total 7 [2021-11-07 01:22:44,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323903000] [2021-11-07 01:22:44,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:22:44,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:22:44,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:22:44,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:22:44,897 INFO L87 Difference]: Start difference. First operand 2420 states and 3166 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:45,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:45,162 INFO L93 Difference]: Finished difference Result 4460 states and 5949 transitions. [2021-11-07 01:22:45,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:22:45,163 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 01:22:45,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:45,171 INFO L225 Difference]: With dead ends: 4460 [2021-11-07 01:22:45,171 INFO L226 Difference]: Without dead ends: 2067 [2021-11-07 01:22:45,175 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:22:45,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2021-11-07 01:22:45,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 1586. [2021-11-07 01:22:45,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1586 states, 1583 states have (on average 1.3442830069488314) internal successors, (2128), 1585 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:45,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1586 states to 1586 states and 2128 transitions. [2021-11-07 01:22:45,289 INFO L78 Accepts]: Start accepts. Automaton has 1586 states and 2128 transitions. Word has length 44 [2021-11-07 01:22:45,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:45,290 INFO L470 AbstractCegarLoop]: Abstraction has 1586 states and 2128 transitions. [2021-11-07 01:22:45,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:45,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1586 states and 2128 transitions. [2021-11-07 01:22:45,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 01:22:45,291 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:45,291 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:22:45,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5bed83-10bd-45c2-ac0d-a04893d090ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:22:45,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5bed83-10bd-45c2-ac0d-a04893d090ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-07 01:22:45,512 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:45,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:45,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1869822624, now seen corresponding path program 1 times [2021-11-07 01:22:45,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:22:45,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074231178] [2021-11-07 01:22:45,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:45,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:22:45,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:45,553 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:22:45,553 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:22:45,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074231178] [2021-11-07 01:22:45,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074231178] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:45,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:45,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:22:45,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848950338] [2021-11-07 01:22:45,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:22:45,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:22:45,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:22:45,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:22:45,556 INFO L87 Difference]: Start difference. First operand 1586 states and 2128 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:45,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:45,682 INFO L93 Difference]: Finished difference Result 3545 states and 4761 transitions. [2021-11-07 01:22:45,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:22:45,682 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-07 01:22:45,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:45,690 INFO L225 Difference]: With dead ends: 3545 [2021-11-07 01:22:45,691 INFO L226 Difference]: Without dead ends: 1986 [2021-11-07 01:22:45,693 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:22:45,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1986 states. [2021-11-07 01:22:45,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1986 to 1586. [2021-11-07 01:22:45,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1586 states, 1583 states have (on average 1.3354390397978522) internal successors, (2114), 1585 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:45,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1586 states to 1586 states and 2114 transitions. [2021-11-07 01:22:45,826 INFO L78 Accepts]: Start accepts. Automaton has 1586 states and 2114 transitions. Word has length 49 [2021-11-07 01:22:45,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:45,827 INFO L470 AbstractCegarLoop]: Abstraction has 1586 states and 2114 transitions. [2021-11-07 01:22:45,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:45,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1586 states and 2114 transitions. [2021-11-07 01:22:45,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 01:22:45,828 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:45,828 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:22:45,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-07 01:22:45,829 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:45,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:45,829 INFO L85 PathProgramCache]: Analyzing trace with hash 799398945, now seen corresponding path program 1 times [2021-11-07 01:22:45,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:22:45,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037108093] [2021-11-07 01:22:45,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:45,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:22:45,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:45,861 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:22:45,861 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:22:45,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037108093] [2021-11-07 01:22:45,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037108093] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:45,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:45,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:22:45,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122384071] [2021-11-07 01:22:45,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:22:45,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:22:45,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:22:45,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:22:45,864 INFO L87 Difference]: Start difference. First operand 1586 states and 2114 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:45,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:45,985 INFO L93 Difference]: Finished difference Result 3282 states and 4387 transitions. [2021-11-07 01:22:45,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:22:45,985 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-07 01:22:45,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:45,991 INFO L225 Difference]: With dead ends: 3282 [2021-11-07 01:22:45,991 INFO L226 Difference]: Without dead ends: 1723 [2021-11-07 01:22:45,994 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:22:45,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1723 states. [2021-11-07 01:22:46,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1723 to 1681. [2021-11-07 01:22:46,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1681 states, 1678 states have (on average 1.3188319427890345) internal successors, (2213), 1680 states have internal predecessors, (2213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:46,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1681 states to 1681 states and 2213 transitions. [2021-11-07 01:22:46,112 INFO L78 Accepts]: Start accepts. Automaton has 1681 states and 2213 transitions. Word has length 49 [2021-11-07 01:22:46,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:46,112 INFO L470 AbstractCegarLoop]: Abstraction has 1681 states and 2213 transitions. [2021-11-07 01:22:46,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:46,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1681 states and 2213 transitions. [2021-11-07 01:22:46,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 01:22:46,114 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:46,114 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:22:46,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-07 01:22:46,114 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:46,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:46,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1429365893, now seen corresponding path program 1 times [2021-11-07 01:22:46,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:22:46,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822715369] [2021-11-07 01:22:46,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:46,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:22:46,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:46,162 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:22:46,162 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:22:46,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822715369] [2021-11-07 01:22:46,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822715369] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:22:46,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939840385] [2021-11-07 01:22:46,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:46,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:22:46,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5bed83-10bd-45c2-ac0d-a04893d090ee/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:22:46,164 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5bed83-10bd-45c2-ac0d-a04893d090ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:22:46,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5bed83-10bd-45c2-ac0d-a04893d090ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 01:22:46,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:46,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:22:46,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:22:46,515 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:22:46,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:22:46,665 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:22:46,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939840385] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:22:46,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1904030402] [2021-11-07 01:22:46,668 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2021-11-07 01:22:46,669 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:22:46,669 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:22:46,669 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:22:46,669 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs