./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_026ac86f-8e74-47b8-aa90-806ca031ca1c/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_026ac86f-8e74-47b8-aa90-806ca031ca1c/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_026ac86f-8e74-47b8-aa90-806ca031ca1c/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_026ac86f-8e74-47b8-aa90-806ca031ca1c/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_026ac86f-8e74-47b8-aa90-806ca031ca1c/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_026ac86f-8e74-47b8-aa90-806ca031ca1c/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 37da121d1485cf4d7db5098d27ad9010a5336c778943ff6fd7c53fe4a9fdfbdc --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:28:49,650 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:28:49,652 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:28:49,686 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:28:49,687 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:28:49,688 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:28:49,690 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:28:49,692 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:28:49,695 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:28:49,696 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:28:49,697 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:28:49,699 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:28:49,699 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:28:49,701 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:28:49,703 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:28:49,704 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:28:49,706 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:28:49,707 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:28:49,710 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:28:49,713 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:28:49,715 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:28:49,717 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:28:49,718 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:28:49,720 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:28:49,723 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:28:49,724 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:28:49,724 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:28:49,726 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:28:49,726 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:28:49,728 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:28:49,728 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:28:49,729 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:28:49,730 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:28:49,731 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:28:49,732 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:28:49,733 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:28:49,734 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:28:49,734 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:28:49,734 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:28:49,736 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:28:49,737 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:28:49,738 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_026ac86f-8e74-47b8-aa90-806ca031ca1c/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:28:49,763 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:28:49,763 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:28:49,764 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:28:49,765 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:28:49,765 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:28:49,766 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:28:49,766 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:28:49,766 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:28:49,767 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:28:49,767 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:28:49,767 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:28:49,768 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:28:49,768 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:28:49,769 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:28:49,769 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:28:49,769 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:28:49,770 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:28:49,771 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:28:49,771 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:28:49,772 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:28:49,772 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:28:49,772 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:28:49,773 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:28:49,773 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:28:49,780 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:28:49,781 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:28:49,781 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:28:49,781 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:28:49,781 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:28:49,782 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:28:49,782 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:28:49,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:28:49,782 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:28:49,783 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:28:49,783 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:28:49,783 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:28:49,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:28:49,784 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:28:49,784 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:28:49,784 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:28:49,784 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_026ac86f-8e74-47b8-aa90-806ca031ca1c/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_026ac86f-8e74-47b8-aa90-806ca031ca1c/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 37da121d1485cf4d7db5098d27ad9010a5336c778943ff6fd7c53fe4a9fdfbdc [2021-11-12 23:28:50,029 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:28:50,051 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:28:50,055 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:28:50,056 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:28:50,057 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:28:50,059 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_026ac86f-8e74-47b8-aa90-806ca031ca1c/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-12 23:28:50,145 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_026ac86f-8e74-47b8-aa90-806ca031ca1c/bin/utaipan-vmNK8stdcF/data/bdbb9eae3/0718b9373f0b4327a7347aa6d5ee4c42/FLAGea5b2114b [2021-11-12 23:28:50,657 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:28:50,658 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_026ac86f-8e74-47b8-aa90-806ca031ca1c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-12 23:28:50,671 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_026ac86f-8e74-47b8-aa90-806ca031ca1c/bin/utaipan-vmNK8stdcF/data/bdbb9eae3/0718b9373f0b4327a7347aa6d5ee4c42/FLAGea5b2114b [2021-11-12 23:28:50,969 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_026ac86f-8e74-47b8-aa90-806ca031ca1c/bin/utaipan-vmNK8stdcF/data/bdbb9eae3/0718b9373f0b4327a7347aa6d5ee4c42 [2021-11-12 23:28:50,972 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:28:50,974 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:28:50,975 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:28:50,976 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:28:50,979 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:28:50,980 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:28:50" (1/1) ... [2021-11-12 23:28:50,981 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dedea5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:28:50, skipping insertion in model container [2021-11-12 23:28:50,981 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:28:50" (1/1) ... [2021-11-12 23:28:50,989 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:28:51,085 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:28:51,336 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_026ac86f-8e74-47b8-aa90-806ca031ca1c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[8458,8471] [2021-11-12 23:28:51,413 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:28:51,428 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:28:51,514 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_026ac86f-8e74-47b8-aa90-806ca031ca1c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[8458,8471] [2021-11-12 23:28:51,557 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:28:51,586 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:28:51,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:28:51 WrapperNode [2021-11-12 23:28:51,587 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:28:51,588 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:28:51,588 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:28:51,588 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:28:51,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:28:51" (1/1) ... [2021-11-12 23:28:51,617 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:28:51" (1/1) ... [2021-11-12 23:28:51,673 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:28:51,674 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:28:51,675 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:28:51,675 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:28:51,696 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:28:51" (1/1) ... [2021-11-12 23:28:51,696 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:28:51" (1/1) ... [2021-11-12 23:28:51,701 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:28:51" (1/1) ... [2021-11-12 23:28:51,702 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:28:51" (1/1) ... [2021-11-12 23:28:51,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:28:51" (1/1) ... [2021-11-12 23:28:51,726 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:28:51" (1/1) ... [2021-11-12 23:28:51,756 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:28:51" (1/1) ... [2021-11-12 23:28:51,761 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:28:51,762 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:28:51,762 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:28:51,762 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:28:51,763 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:28:51" (1/1) ... [2021-11-12 23:28:51,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:28:51,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_026ac86f-8e74-47b8-aa90-806ca031ca1c/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:28:51,821 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_026ac86f-8e74-47b8-aa90-806ca031ca1c/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:28:51,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_026ac86f-8e74-47b8-aa90-806ca031ca1c/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:28:51,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 23:28:51,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:28:51,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:28:51,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:28:53,154 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:28:53,154 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 23:28:53,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:28:53 BoogieIcfgContainer [2021-11-12 23:28:53,158 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:28:53,160 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:28:53,160 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:28:53,164 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:28:53,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:28:50" (1/3) ... [2021-11-12 23:28:53,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7748220b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:28:53, skipping insertion in model container [2021-11-12 23:28:53,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:28:51" (2/3) ... [2021-11-12 23:28:53,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7748220b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:28:53, skipping insertion in model container [2021-11-12 23:28:53,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:28:53" (3/3) ... [2021-11-12 23:28:53,169 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-12 23:28:53,181 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:28:53,181 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:28:53,259 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:28:53,271 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:28:53,271 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:28:53,297 INFO L276 IsEmpty]: Start isEmpty. Operand has 162 states, 160 states have (on average 1.70625) internal successors, (273), 161 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:53,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-12 23:28:53,322 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:28:53,323 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:28:53,324 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:28:53,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:28:53,330 INFO L85 PathProgramCache]: Analyzing trace with hash -557134959, now seen corresponding path program 1 times [2021-11-12 23:28:53,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:28:53,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078846964] [2021-11-12 23:28:53,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:28:53,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:28:53,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:28:53,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:28:53,948 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:28:53,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078846964] [2021-11-12 23:28:53,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078846964] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:28:53,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:28:53,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-12 23:28:53,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004090569] [2021-11-12 23:28:53,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:28:53,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:28:53,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:28:53,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:28:53,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:28:53,996 INFO L87 Difference]: Start difference. First operand has 162 states, 160 states have (on average 1.70625) internal successors, (273), 161 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:54,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:28:54,464 INFO L93 Difference]: Finished difference Result 564 states and 904 transitions. [2021-11-12 23:28:54,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:28:54,467 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-12 23:28:54,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:28:54,483 INFO L225 Difference]: With dead ends: 564 [2021-11-12 23:28:54,484 INFO L226 Difference]: Without dead ends: 469 [2021-11-12 23:28:54,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:28:54,492 INFO L933 BasicCegarLoop]: 421 mSDtfsCounter, 702 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 239.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 1349 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.35ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 305.90ms IncrementalHoareTripleChecker+Time [2021-11-12 23:28:54,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [702 Valid, 1349 Invalid, 212 Unknown, 0 Unchecked, 16.35ms Time], IncrementalHoareTripleChecker [23 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 305.90ms Time] [2021-11-12 23:28:54,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-11-12 23:28:54,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 461. [2021-11-12 23:28:54,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 1.4152173913043478) internal successors, (651), 460 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:54,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 651 transitions. [2021-11-12 23:28:54,597 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 651 transitions. Word has length 67 [2021-11-12 23:28:54,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:28:54,598 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 651 transitions. [2021-11-12 23:28:54,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:54,600 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 651 transitions. [2021-11-12 23:28:54,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-12 23:28:54,605 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:28:54,608 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:28:54,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 23:28:54,609 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:28:54,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:28:54,612 INFO L85 PathProgramCache]: Analyzing trace with hash -707625794, now seen corresponding path program 1 times [2021-11-12 23:28:54,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:28:54,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732212943] [2021-11-12 23:28:54,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:28:54,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:28:54,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:28:54,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:28:54,795 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:28:54,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732212943] [2021-11-12 23:28:54,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732212943] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:28:54,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:28:54,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:28:54,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22696614] [2021-11-12 23:28:54,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:28:54,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:28:54,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:28:54,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:28:54,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:28:54,802 INFO L87 Difference]: Start difference. First operand 461 states and 651 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:55,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:28:55,148 INFO L93 Difference]: Finished difference Result 1109 states and 1611 transitions. [2021-11-12 23:28:55,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:28:55,149 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-12 23:28:55,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:28:55,155 INFO L225 Difference]: With dead ends: 1109 [2021-11-12 23:28:55,156 INFO L226 Difference]: Without dead ends: 728 [2021-11-12 23:28:55,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:28:55,186 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 565 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 186.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.46ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 240.19ms IncrementalHoareTripleChecker+Time [2021-11-12 23:28:55,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 234 Invalid, 214 Unknown, 0 Unchecked, 5.46ms Time], IncrementalHoareTripleChecker [6 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 240.19ms Time] [2021-11-12 23:28:55,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-11-12 23:28:55,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 726. [2021-11-12 23:28:55,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 1.446896551724138) internal successors, (1049), 725 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:55,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 1049 transitions. [2021-11-12 23:28:55,295 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 1049 transitions. Word has length 68 [2021-11-12 23:28:55,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:28:55,297 INFO L470 AbstractCegarLoop]: Abstraction has 726 states and 1049 transitions. [2021-11-12 23:28:55,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:55,298 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 1049 transitions. [2021-11-12 23:28:55,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-12 23:28:55,311 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:28:55,312 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:28:55,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-12 23:28:55,313 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:28:55,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:28:55,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1204520307, now seen corresponding path program 1 times [2021-11-12 23:28:55,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:28:55,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14116584] [2021-11-12 23:28:55,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:28:55,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:28:55,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:28:55,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:28:55,463 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:28:55,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14116584] [2021-11-12 23:28:55,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14116584] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:28:55,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:28:55,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:28:55,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461439272] [2021-11-12 23:28:55,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:28:55,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:28:55,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:28:55,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:28:55,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:28:55,468 INFO L87 Difference]: Start difference. First operand 726 states and 1049 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:55,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:28:55,853 INFO L93 Difference]: Finished difference Result 1874 states and 2770 transitions. [2021-11-12 23:28:55,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:28:55,854 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-12 23:28:55,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:28:55,864 INFO L225 Difference]: With dead ends: 1874 [2021-11-12 23:28:55,865 INFO L226 Difference]: Without dead ends: 1258 [2021-11-12 23:28:55,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:28:55,878 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 548 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 169.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.99ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 219.21ms IncrementalHoareTripleChecker+Time [2021-11-12 23:28:55,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [548 Valid, 242 Invalid, 211 Unknown, 0 Unchecked, 4.99ms Time], IncrementalHoareTripleChecker [6 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 219.21ms Time] [2021-11-12 23:28:55,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2021-11-12 23:28:56,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 1256. [2021-11-12 23:28:56,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1256 states, 1255 states have (on average 1.4685258964143426) internal successors, (1843), 1255 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:56,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 1843 transitions. [2021-11-12 23:28:56,015 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 1843 transitions. Word has length 68 [2021-11-12 23:28:56,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:28:56,016 INFO L470 AbstractCegarLoop]: Abstraction has 1256 states and 1843 transitions. [2021-11-12 23:28:56,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:56,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 1843 transitions. [2021-11-12 23:28:56,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-12 23:28:56,019 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:28:56,019 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:28:56,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-12 23:28:56,020 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:28:56,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:28:56,021 INFO L85 PathProgramCache]: Analyzing trace with hash 701000348, now seen corresponding path program 1 times [2021-11-12 23:28:56,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:28:56,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099689807] [2021-11-12 23:28:56,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:28:56,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:28:56,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:28:56,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:28:56,158 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:28:56,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099689807] [2021-11-12 23:28:56,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099689807] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:28:56,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:28:56,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:28:56,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149119407] [2021-11-12 23:28:56,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:28:56,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:28:56,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:28:56,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:28:56,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:28:56,161 INFO L87 Difference]: Start difference. First operand 1256 states and 1843 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:56,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:28:56,589 INFO L93 Difference]: Finished difference Result 3430 states and 5115 transitions. [2021-11-12 23:28:56,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:28:56,590 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-12 23:28:56,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:28:56,605 INFO L225 Difference]: With dead ends: 3430 [2021-11-12 23:28:56,605 INFO L226 Difference]: Without dead ends: 2318 [2021-11-12 23:28:56,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:28:56,609 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 566 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 171.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.94ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 208.16ms IncrementalHoareTripleChecker+Time [2021-11-12 23:28:56,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [566 Valid, 243 Invalid, 197 Unknown, 0 Unchecked, 4.94ms Time], IncrementalHoareTripleChecker [6 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 208.16ms Time] [2021-11-12 23:28:56,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2318 states. [2021-11-12 23:28:56,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2318 to 2316. [2021-11-12 23:28:56,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2316 states, 2315 states have (on average 1.4807775377969763) internal successors, (3428), 2315 states have internal predecessors, (3428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:56,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2316 states to 2316 states and 3428 transitions. [2021-11-12 23:28:56,831 INFO L78 Accepts]: Start accepts. Automaton has 2316 states and 3428 transitions. Word has length 68 [2021-11-12 23:28:56,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:28:56,831 INFO L470 AbstractCegarLoop]: Abstraction has 2316 states and 3428 transitions. [2021-11-12 23:28:56,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:56,832 INFO L276 IsEmpty]: Start isEmpty. Operand 2316 states and 3428 transitions. [2021-11-12 23:28:56,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-12 23:28:56,833 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:28:56,833 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:28:56,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-12 23:28:56,834 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:28:56,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:28:56,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1467478319, now seen corresponding path program 1 times [2021-11-12 23:28:56,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:28:56,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158209639] [2021-11-12 23:28:56,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:28:56,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:28:56,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:28:56,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:28:56,910 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:28:56,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158209639] [2021-11-12 23:28:56,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158209639] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:28:56,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:28:56,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:28:56,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865969482] [2021-11-12 23:28:56,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:28:56,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:28:56,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:28:56,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:28:56,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:28:56,913 INFO L87 Difference]: Start difference. First operand 2316 states and 3428 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:57,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:28:57,541 INFO L93 Difference]: Finished difference Result 6697 states and 9989 transitions. [2021-11-12 23:28:57,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:28:57,541 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-12 23:28:57,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:28:57,569 INFO L225 Difference]: With dead ends: 6697 [2021-11-12 23:28:57,569 INFO L226 Difference]: Without dead ends: 4438 [2021-11-12 23:28:57,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:28:57,574 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 558 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 158.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.38ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 198.39ms IncrementalHoareTripleChecker+Time [2021-11-12 23:28:57,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [558 Valid, 226 Invalid, 209 Unknown, 0 Unchecked, 4.38ms Time], IncrementalHoareTripleChecker [6 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 198.39ms Time] [2021-11-12 23:28:57,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4438 states. [2021-11-12 23:28:57,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4438 to 4436. [2021-11-12 23:28:57,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4436 states, 4435 states have (on average 1.4793686583990981) internal successors, (6561), 4435 states have internal predecessors, (6561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:57,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4436 states to 4436 states and 6561 transitions. [2021-11-12 23:28:57,998 INFO L78 Accepts]: Start accepts. Automaton has 4436 states and 6561 transitions. Word has length 68 [2021-11-12 23:28:58,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:28:58,002 INFO L470 AbstractCegarLoop]: Abstraction has 4436 states and 6561 transitions. [2021-11-12 23:28:58,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:58,003 INFO L276 IsEmpty]: Start isEmpty. Operand 4436 states and 6561 transitions. [2021-11-12 23:28:58,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-12 23:28:58,004 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:28:58,004 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:28:58,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-12 23:28:58,004 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:28:58,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:28:58,008 INFO L85 PathProgramCache]: Analyzing trace with hash -303409184, now seen corresponding path program 1 times [2021-11-12 23:28:58,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:28:58,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671044252] [2021-11-12 23:28:58,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:28:58,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:28:58,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:28:58,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:28:58,113 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:28:58,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671044252] [2021-11-12 23:28:58,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671044252] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:28:58,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:28:58,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:28:58,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830017875] [2021-11-12 23:28:58,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:28:58,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:28:58,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:28:58,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:28:58,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:28:58,116 INFO L87 Difference]: Start difference. First operand 4436 states and 6561 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:59,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:28:59,032 INFO L93 Difference]: Finished difference Result 12353 states and 18326 transitions. [2021-11-12 23:28:59,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:28:59,033 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-12 23:28:59,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:28:59,083 INFO L225 Difference]: With dead ends: 12353 [2021-11-12 23:28:59,083 INFO L226 Difference]: Without dead ends: 7958 [2021-11-12 23:28:59,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:28:59,094 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 563 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 142.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.83ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 176.82ms IncrementalHoareTripleChecker+Time [2021-11-12 23:28:59,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [563 Valid, 218 Invalid, 208 Unknown, 0 Unchecked, 3.83ms Time], IncrementalHoareTripleChecker [6 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 176.82ms Time] [2021-11-12 23:28:59,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7958 states. [2021-11-12 23:28:59,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7958 to 7956. [2021-11-12 23:28:59,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7956 states, 7955 states have (on average 1.4681332495285984) internal successors, (11679), 7955 states have internal predecessors, (11679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:59,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7956 states to 7956 states and 11679 transitions. [2021-11-12 23:28:59,858 INFO L78 Accepts]: Start accepts. Automaton has 7956 states and 11679 transitions. Word has length 68 [2021-11-12 23:28:59,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:28:59,859 INFO L470 AbstractCegarLoop]: Abstraction has 7956 states and 11679 transitions. [2021-11-12 23:28:59,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:59,859 INFO L276 IsEmpty]: Start isEmpty. Operand 7956 states and 11679 transitions. [2021-11-12 23:28:59,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-12 23:28:59,861 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:28:59,861 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:28:59,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-12 23:28:59,861 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:28:59,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:28:59,862 INFO L85 PathProgramCache]: Analyzing trace with hash 281865989, now seen corresponding path program 1 times [2021-11-12 23:28:59,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:28:59,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988652470] [2021-11-12 23:28:59,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:28:59,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:28:59,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:00,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:29:00,799 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:29:00,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988652470] [2021-11-12 23:29:00,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988652470] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:00,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:29:00,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-12 23:29:00,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098948220] [2021-11-12 23:29:00,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:00,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-12 23:29:00,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:29:00,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-12 23:29:00,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:29:00,801 INFO L87 Difference]: Start difference. First operand 7956 states and 11679 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:03,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:03,444 INFO L93 Difference]: Finished difference Result 15362 states and 22455 transitions. [2021-11-12 23:29:03,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 23:29:03,444 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-12 23:29:03,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:03,571 INFO L225 Difference]: With dead ends: 15362 [2021-11-12 23:29:03,571 INFO L226 Difference]: Without dead ends: 15360 [2021-11-12 23:29:03,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2021-11-12 23:29:03,577 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 904 mSDsluCounter, 2281 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 895.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 904 SdHoareTripleChecker+Valid, 2513 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.21ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1045.25ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:03,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [904 Valid, 2513 Invalid, 1064 Unknown, 0 Unchecked, 22.21ms Time], IncrementalHoareTripleChecker [26 Valid, 1038 Invalid, 0 Unknown, 0 Unchecked, 1045.25ms Time] [2021-11-12 23:29:03,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15360 states. [2021-11-12 23:29:04,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15360 to 12609. [2021-11-12 23:29:05,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12609 states, 12608 states have (on average 1.460977157360406) internal successors, (18420), 12608 states have internal predecessors, (18420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:05,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12609 states to 12609 states and 18420 transitions. [2021-11-12 23:29:05,070 INFO L78 Accepts]: Start accepts. Automaton has 12609 states and 18420 transitions. Word has length 69 [2021-11-12 23:29:05,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:05,070 INFO L470 AbstractCegarLoop]: Abstraction has 12609 states and 18420 transitions. [2021-11-12 23:29:05,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:05,072 INFO L276 IsEmpty]: Start isEmpty. Operand 12609 states and 18420 transitions. [2021-11-12 23:29:05,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-12 23:29:05,073 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:05,073 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:05,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-12 23:29:05,074 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:29:05,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:05,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1396919579, now seen corresponding path program 1 times [2021-11-12 23:29:05,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:29:05,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723222413] [2021-11-12 23:29:05,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:05,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:29:05,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:05,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:29:05,835 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:29:05,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723222413] [2021-11-12 23:29:05,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723222413] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:05,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:29:05,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-12 23:29:05,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201899080] [2021-11-12 23:29:05,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:05,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-12 23:29:05,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:29:05,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-12 23:29:05,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:29:05,837 INFO L87 Difference]: Start difference. First operand 12609 states and 18420 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:07,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:07,948 INFO L93 Difference]: Finished difference Result 17818 states and 25960 transitions. [2021-11-12 23:29:07,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 23:29:07,948 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-12 23:29:07,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:07,993 INFO L225 Difference]: With dead ends: 17818 [2021-11-12 23:29:07,993 INFO L226 Difference]: Without dead ends: 15832 [2021-11-12 23:29:08,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2021-11-12 23:29:08,001 INFO L933 BasicCegarLoop]: 341 mSDtfsCounter, 853 mSDsluCounter, 2092 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 652.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 853 SdHoareTripleChecker+Valid, 2401 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.55ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 782.44ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:08,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [853 Valid, 2401 Invalid, 915 Unknown, 0 Unchecked, 8.55ms Time], IncrementalHoareTripleChecker [19 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 782.44ms Time] [2021-11-12 23:29:08,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15832 states. [2021-11-12 23:29:09,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15832 to 14421. [2021-11-12 23:29:09,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14421 states, 14420 states have (on average 1.4582524271844661) internal successors, (21028), 14420 states have internal predecessors, (21028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:09,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14421 states to 14421 states and 21028 transitions. [2021-11-12 23:29:09,519 INFO L78 Accepts]: Start accepts. Automaton has 14421 states and 21028 transitions. Word has length 69 [2021-11-12 23:29:09,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:09,519 INFO L470 AbstractCegarLoop]: Abstraction has 14421 states and 21028 transitions. [2021-11-12 23:29:09,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:09,520 INFO L276 IsEmpty]: Start isEmpty. Operand 14421 states and 21028 transitions. [2021-11-12 23:29:09,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-12 23:29:09,521 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:09,521 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:09,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-12 23:29:09,522 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:29:09,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:09,523 INFO L85 PathProgramCache]: Analyzing trace with hash -864043323, now seen corresponding path program 1 times [2021-11-12 23:29:09,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:29:09,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073372782] [2021-11-12 23:29:09,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:09,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:29:09,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:10,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:29:10,216 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:29:10,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073372782] [2021-11-12 23:29:10,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073372782] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:10,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:29:10,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-12 23:29:10,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667172115] [2021-11-12 23:29:10,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:10,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-12 23:29:10,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:29:10,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-12 23:29:10,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:29:10,219 INFO L87 Difference]: Start difference. First operand 14421 states and 21028 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:12,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:12,360 INFO L93 Difference]: Finished difference Result 17568 states and 25540 transitions. [2021-11-12 23:29:12,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 23:29:12,361 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-12 23:29:12,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:12,413 INFO L225 Difference]: With dead ends: 17568 [2021-11-12 23:29:12,414 INFO L226 Difference]: Without dead ends: 17566 [2021-11-12 23:29:12,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2021-11-12 23:29:12,424 INFO L933 BasicCegarLoop]: 326 mSDtfsCounter, 812 mSDsluCounter, 2148 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 703.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 2445 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.96ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 853.30ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:12,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [812 Valid, 2445 Invalid, 1138 Unknown, 0 Unchecked, 7.96ms Time], IncrementalHoareTripleChecker [20 Valid, 1118 Invalid, 0 Unknown, 0 Unchecked, 853.30ms Time] [2021-11-12 23:29:12,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17566 states. [2021-11-12 23:29:13,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17566 to 14439. [2021-11-12 23:29:13,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14439 states, 14438 states have (on average 1.4578196426097798) internal successors, (21048), 14438 states have internal predecessors, (21048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:13,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14439 states to 14439 states and 21048 transitions. [2021-11-12 23:29:13,730 INFO L78 Accepts]: Start accepts. Automaton has 14439 states and 21048 transitions. Word has length 69 [2021-11-12 23:29:13,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:13,731 INFO L470 AbstractCegarLoop]: Abstraction has 14439 states and 21048 transitions. [2021-11-12 23:29:13,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:13,731 INFO L276 IsEmpty]: Start isEmpty. Operand 14439 states and 21048 transitions. [2021-11-12 23:29:13,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-12 23:29:13,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:13,733 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:13,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-12 23:29:13,733 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:29:13,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:13,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1059032283, now seen corresponding path program 1 times [2021-11-12 23:29:13,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:29:13,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474665443] [2021-11-12 23:29:13,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:13,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:29:13,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:14,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:29:14,426 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:29:14,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474665443] [2021-11-12 23:29:14,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474665443] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:14,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:29:14,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-12 23:29:14,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157960800] [2021-11-12 23:29:14,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:14,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-12 23:29:14,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:29:14,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-12 23:29:14,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:29:14,427 INFO L87 Difference]: Start difference. First operand 14439 states and 21048 transitions. Second operand has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:16,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:16,509 INFO L93 Difference]: Finished difference Result 25149 states and 36679 transitions. [2021-11-12 23:29:16,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 23:29:16,509 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-12 23:29:16,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:16,578 INFO L225 Difference]: With dead ends: 25149 [2021-11-12 23:29:16,578 INFO L226 Difference]: Without dead ends: 23163 [2021-11-12 23:29:16,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2021-11-12 23:29:16,593 INFO L933 BasicCegarLoop]: 341 mSDtfsCounter, 966 mSDsluCounter, 1404 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 442.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 966 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.32ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 543.65ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:16,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [966 Valid, 1726 Invalid, 683 Unknown, 0 Unchecked, 5.32ms Time], IncrementalHoareTripleChecker [25 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 543.65ms Time] [2021-11-12 23:29:16,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23163 states. [2021-11-12 23:29:18,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23163 to 17868. [2021-11-12 23:29:18,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17868 states, 17867 states have (on average 1.4546370403537248) internal successors, (25990), 17867 states have internal predecessors, (25990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:18,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17868 states to 17868 states and 25990 transitions. [2021-11-12 23:29:18,358 INFO L78 Accepts]: Start accepts. Automaton has 17868 states and 25990 transitions. Word has length 69 [2021-11-12 23:29:18,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:18,358 INFO L470 AbstractCegarLoop]: Abstraction has 17868 states and 25990 transitions. [2021-11-12 23:29:18,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:18,359 INFO L276 IsEmpty]: Start isEmpty. Operand 17868 states and 25990 transitions. [2021-11-12 23:29:18,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-12 23:29:18,360 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:18,361 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:18,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-12 23:29:18,361 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:29:18,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:18,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1126645573, now seen corresponding path program 1 times [2021-11-12 23:29:18,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:29:18,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144428011] [2021-11-12 23:29:18,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:18,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:29:18,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:19,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:29:19,077 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:29:19,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144428011] [2021-11-12 23:29:19,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144428011] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:19,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:29:19,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-12 23:29:19,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164000560] [2021-11-12 23:29:19,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:19,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-12 23:29:19,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:29:19,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-12 23:29:19,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:29:19,080 INFO L87 Difference]: Start difference. First operand 17868 states and 25990 transitions. Second operand has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:21,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:21,855 INFO L93 Difference]: Finished difference Result 32860 states and 47906 transitions. [2021-11-12 23:29:21,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 23:29:21,856 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-12 23:29:21,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:21,924 INFO L225 Difference]: With dead ends: 32860 [2021-11-12 23:29:21,924 INFO L226 Difference]: Without dead ends: 30874 [2021-11-12 23:29:21,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2021-11-12 23:29:21,944 INFO L933 BasicCegarLoop]: 341 mSDtfsCounter, 897 mSDsluCounter, 2247 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 470.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 897 SdHoareTripleChecker+Valid, 2545 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.82ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 573.23ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:21,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [897 Valid, 2545 Invalid, 789 Unknown, 0 Unchecked, 5.82ms Time], IncrementalHoareTripleChecker [24 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 573.23ms Time] [2021-11-12 23:29:21,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30874 states. [2021-11-12 23:29:23,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30874 to 19396. [2021-11-12 23:29:23,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19396 states, 19395 states have (on average 1.454189224026811) internal successors, (28204), 19395 states have internal predecessors, (28204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:23,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19396 states to 19396 states and 28204 transitions. [2021-11-12 23:29:23,752 INFO L78 Accepts]: Start accepts. Automaton has 19396 states and 28204 transitions. Word has length 69 [2021-11-12 23:29:23,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:23,752 INFO L470 AbstractCegarLoop]: Abstraction has 19396 states and 28204 transitions. [2021-11-12 23:29:23,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:23,753 INFO L276 IsEmpty]: Start isEmpty. Operand 19396 states and 28204 transitions. [2021-11-12 23:29:23,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-12 23:29:23,753 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:23,754 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:23,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-12 23:29:23,754 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:29:23,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:23,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1724107097, now seen corresponding path program 1 times [2021-11-12 23:29:23,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:29:23,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964893940] [2021-11-12 23:29:23,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:23,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:29:23,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:24,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:29:24,477 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:29:24,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964893940] [2021-11-12 23:29:24,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964893940] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:24,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:29:24,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-12 23:29:24,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837359328] [2021-11-12 23:29:24,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:24,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-12 23:29:24,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:29:24,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-12 23:29:24,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:29:24,479 INFO L87 Difference]: Start difference. First operand 19396 states and 28204 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:27,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:27,074 INFO L93 Difference]: Finished difference Result 26431 states and 38368 transitions. [2021-11-12 23:29:27,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 23:29:27,074 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-12 23:29:27,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:27,117 INFO L225 Difference]: With dead ends: 26431 [2021-11-12 23:29:27,117 INFO L226 Difference]: Without dead ends: 24445 [2021-11-12 23:29:27,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2021-11-12 23:29:27,128 INFO L933 BasicCegarLoop]: 345 mSDtfsCounter, 971 mSDsluCounter, 2360 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 594.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 971 SdHoareTripleChecker+Valid, 2670 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.34ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 699.24ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:27,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [971 Valid, 2670 Invalid, 819 Unknown, 0 Unchecked, 7.34ms Time], IncrementalHoareTripleChecker [25 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 699.24ms Time] [2021-11-12 23:29:27,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24445 states. [2021-11-12 23:29:28,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24445 to 19399. [2021-11-12 23:29:28,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19399 states, 19398 states have (on average 1.4541189813382822) internal successors, (28207), 19398 states have internal predecessors, (28207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:28,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19399 states to 19399 states and 28207 transitions. [2021-11-12 23:29:28,731 INFO L78 Accepts]: Start accepts. Automaton has 19399 states and 28207 transitions. Word has length 71 [2021-11-12 23:29:28,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:28,731 INFO L470 AbstractCegarLoop]: Abstraction has 19399 states and 28207 transitions. [2021-11-12 23:29:28,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:28,732 INFO L276 IsEmpty]: Start isEmpty. Operand 19399 states and 28207 transitions. [2021-11-12 23:29:28,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-12 23:29:28,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:28,733 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:28,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-12 23:29:28,734 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:29:28,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:28,734 INFO L85 PathProgramCache]: Analyzing trace with hash -2037983943, now seen corresponding path program 1 times [2021-11-12 23:29:28,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:29:28,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378443586] [2021-11-12 23:29:28,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:28,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:29:28,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:29,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:29:29,525 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:29:29,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378443586] [2021-11-12 23:29:29,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378443586] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:29,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:29:29,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-12 23:29:29,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032887597] [2021-11-12 23:29:29,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:29,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-12 23:29:29,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:29:29,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-12 23:29:29,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:29:29,528 INFO L87 Difference]: Start difference. First operand 19399 states and 28207 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:32,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:32,419 INFO L93 Difference]: Finished difference Result 26807 states and 38982 transitions. [2021-11-12 23:29:32,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 23:29:32,419 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-12 23:29:32,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:32,464 INFO L225 Difference]: With dead ends: 26807 [2021-11-12 23:29:32,464 INFO L226 Difference]: Without dead ends: 26805 [2021-11-12 23:29:32,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2021-11-12 23:29:32,475 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 931 mSDsluCounter, 1693 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 567.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 931 SdHoareTripleChecker+Valid, 1933 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.60ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 672.23ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:32,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [931 Valid, 1933 Invalid, 993 Unknown, 0 Unchecked, 6.60ms Time], IncrementalHoareTripleChecker [24 Valid, 969 Invalid, 0 Unknown, 0 Unchecked, 672.23ms Time] [2021-11-12 23:29:32,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26805 states. [2021-11-12 23:29:33,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26805 to 19402. [2021-11-12 23:29:33,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19402 states, 19401 states have (on average 1.4540487603731767) internal successors, (28210), 19401 states have internal predecessors, (28210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:33,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19402 states to 19402 states and 28210 transitions. [2021-11-12 23:29:33,978 INFO L78 Accepts]: Start accepts. Automaton has 19402 states and 28210 transitions. Word has length 71 [2021-11-12 23:29:33,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:33,979 INFO L470 AbstractCegarLoop]: Abstraction has 19402 states and 28210 transitions. [2021-11-12 23:29:33,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:33,979 INFO L276 IsEmpty]: Start isEmpty. Operand 19402 states and 28210 transitions. [2021-11-12 23:29:33,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-12 23:29:33,984 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:33,984 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:33,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-12 23:29:33,985 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:29:33,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:33,985 INFO L85 PathProgramCache]: Analyzing trace with hash -443211495, now seen corresponding path program 1 times [2021-11-12 23:29:33,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:29:33,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637857126] [2021-11-12 23:29:33,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:33,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:29:34,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:34,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:29:34,760 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:29:34,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637857126] [2021-11-12 23:29:34,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637857126] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:34,760 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:29:34,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-12 23:29:34,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774924061] [2021-11-12 23:29:34,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:34,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-12 23:29:34,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:29:34,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-12 23:29:34,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:29:34,762 INFO L87 Difference]: Start difference. First operand 19402 states and 28210 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:37,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:37,349 INFO L93 Difference]: Finished difference Result 24542 states and 35568 transitions. [2021-11-12 23:29:37,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-12 23:29:37,349 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-12 23:29:37,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:37,382 INFO L225 Difference]: With dead ends: 24542 [2021-11-12 23:29:37,382 INFO L226 Difference]: Without dead ends: 24540 [2021-11-12 23:29:37,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2021-11-12 23:29:37,388 INFO L933 BasicCegarLoop]: 413 mSDtfsCounter, 878 mSDsluCounter, 2653 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 510.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 878 SdHoareTripleChecker+Valid, 3032 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.27ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 605.27ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:37,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [878 Valid, 3032 Invalid, 859 Unknown, 0 Unchecked, 6.27ms Time], IncrementalHoareTripleChecker [18 Valid, 841 Invalid, 0 Unknown, 0 Unchecked, 605.27ms Time] [2021-11-12 23:29:37,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24540 states. [2021-11-12 23:29:38,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24540 to 20406. [2021-11-12 23:29:38,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20406 states, 20405 states have (on average 1.4522420975251165) internal successors, (29633), 20405 states have internal predecessors, (29633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:38,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20406 states to 20406 states and 29633 transitions. [2021-11-12 23:29:38,803 INFO L78 Accepts]: Start accepts. Automaton has 20406 states and 29633 transitions. Word has length 71 [2021-11-12 23:29:38,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:38,804 INFO L470 AbstractCegarLoop]: Abstraction has 20406 states and 29633 transitions. [2021-11-12 23:29:38,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:38,804 INFO L276 IsEmpty]: Start isEmpty. Operand 20406 states and 29633 transitions. [2021-11-12 23:29:38,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-12 23:29:38,806 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:38,806 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:38,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-12 23:29:38,807 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:29:38,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:38,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1005125223, now seen corresponding path program 1 times [2021-11-12 23:29:38,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:29:38,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199340622] [2021-11-12 23:29:38,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:38,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:29:38,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:39,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:29:39,635 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:29:39,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199340622] [2021-11-12 23:29:39,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199340622] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:39,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:29:39,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-12 23:29:39,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911757943] [2021-11-12 23:29:39,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:39,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-12 23:29:39,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:29:39,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-12 23:29:39,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-11-12 23:29:39,637 INFO L87 Difference]: Start difference. First operand 20406 states and 29633 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:42,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:42,494 INFO L93 Difference]: Finished difference Result 34296 states and 49832 transitions. [2021-11-12 23:29:42,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-12 23:29:42,495 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-12 23:29:42,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:42,529 INFO L225 Difference]: With dead ends: 34296 [2021-11-12 23:29:42,529 INFO L226 Difference]: Without dead ends: 26678 [2021-11-12 23:29:42,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2021-11-12 23:29:42,548 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 861 mSDsluCounter, 1611 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 397.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 1851 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.58ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 468.15ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:42,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [861 Valid, 1851 Invalid, 667 Unknown, 0 Unchecked, 4.58ms Time], IncrementalHoareTripleChecker [26 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 468.15ms Time] [2021-11-12 23:29:42,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26678 states. [2021-11-12 23:29:44,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26678 to 23000. [2021-11-12 23:29:44,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23000 states, 22999 states have (on average 1.4498021653115354) internal successors, (33344), 22999 states have internal predecessors, (33344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:44,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23000 states to 23000 states and 33344 transitions. [2021-11-12 23:29:44,210 INFO L78 Accepts]: Start accepts. Automaton has 23000 states and 33344 transitions. Word has length 71 [2021-11-12 23:29:44,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:44,210 INFO L470 AbstractCegarLoop]: Abstraction has 23000 states and 33344 transitions. [2021-11-12 23:29:44,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:44,210 INFO L276 IsEmpty]: Start isEmpty. Operand 23000 states and 33344 transitions. [2021-11-12 23:29:44,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-12 23:29:44,212 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:44,212 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:44,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-12 23:29:44,212 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:29:44,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:44,213 INFO L85 PathProgramCache]: Analyzing trace with hash 2143932761, now seen corresponding path program 1 times [2021-11-12 23:29:44,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:29:44,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874185393] [2021-11-12 23:29:44,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:44,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:29:44,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:45,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:29:45,190 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:29:45,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874185393] [2021-11-12 23:29:45,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874185393] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:45,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:29:45,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-12 23:29:45,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016301966] [2021-11-12 23:29:45,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:45,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-12 23:29:45,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:29:45,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-12 23:29:45,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:29:45,192 INFO L87 Difference]: Start difference. First operand 23000 states and 33344 transitions. Second operand has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:48,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:48,900 INFO L93 Difference]: Finished difference Result 28165 states and 40728 transitions. [2021-11-12 23:29:48,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-12 23:29:48,901 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-12 23:29:48,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:48,949 INFO L225 Difference]: With dead ends: 28165 [2021-11-12 23:29:48,949 INFO L226 Difference]: Without dead ends: 28163 [2021-11-12 23:29:48,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-11-12 23:29:48,961 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 1152 mSDsluCounter, 1985 mSDsCounter, 0 mSdLazyCounter, 2475 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1140.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1152 SdHoareTripleChecker+Valid, 2182 SdHoareTripleChecker+Invalid, 2496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.29ms SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1355.26ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:48,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1152 Valid, 2182 Invalid, 2496 Unknown, 0 Unchecked, 8.29ms Time], IncrementalHoareTripleChecker [21 Valid, 2475 Invalid, 0 Unknown, 0 Unchecked, 1355.26ms Time] [2021-11-12 23:29:48,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28163 states. [2021-11-12 23:29:50,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28163 to 23004. [2021-11-12 23:29:50,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23004 states, 23003 states have (on average 1.4498108942311871) internal successors, (33350), 23003 states have internal predecessors, (33350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:50,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23004 states to 23004 states and 33350 transitions. [2021-11-12 23:29:50,815 INFO L78 Accepts]: Start accepts. Automaton has 23004 states and 33350 transitions. Word has length 71 [2021-11-12 23:29:50,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:50,816 INFO L470 AbstractCegarLoop]: Abstraction has 23004 states and 33350 transitions. [2021-11-12 23:29:50,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:50,816 INFO L276 IsEmpty]: Start isEmpty. Operand 23004 states and 33350 transitions. [2021-11-12 23:29:50,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-12 23:29:50,818 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:50,818 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:50,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-12 23:29:50,819 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:29:50,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:50,819 INFO L85 PathProgramCache]: Analyzing trace with hash -807713351, now seen corresponding path program 1 times [2021-11-12 23:29:50,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:29:50,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143425141] [2021-11-12 23:29:50,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:50,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:29:50,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:51,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:29:51,912 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:29:51,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143425141] [2021-11-12 23:29:51,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143425141] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:51,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:29:51,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-11-12 23:29:51,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532833118] [2021-11-12 23:29:51,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:51,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-12 23:29:51,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:29:51,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-12 23:29:51,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-11-12 23:29:51,915 INFO L87 Difference]: Start difference. First operand 23004 states and 33350 transitions. Second operand has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:56,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:56,296 INFO L93 Difference]: Finished difference Result 33295 states and 48203 transitions. [2021-11-12 23:29:56,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-12 23:29:56,297 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-12 23:29:56,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:56,339 INFO L225 Difference]: With dead ends: 33295 [2021-11-12 23:29:56,340 INFO L226 Difference]: Without dead ends: 31309 [2021-11-12 23:29:56,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=346, Invalid=1460, Unknown=0, NotChecked=0, Total=1806 [2021-11-12 23:29:56,352 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 1535 mSDsluCounter, 1830 mSDsCounter, 0 mSdLazyCounter, 2456 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1176.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1535 SdHoareTripleChecker+Valid, 1992 SdHoareTripleChecker+Invalid, 2500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.76ms SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 2456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1394.15ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:56,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1535 Valid, 1992 Invalid, 2500 Unknown, 0 Unchecked, 8.76ms Time], IncrementalHoareTripleChecker [44 Valid, 2456 Invalid, 0 Unknown, 0 Unchecked, 1394.15ms Time] [2021-11-12 23:29:56,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31309 states. [2021-11-12 23:29:58,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31309 to 23027. [2021-11-12 23:29:58,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23027 states, 23026 states have (on average 1.4495353079127942) internal successors, (33377), 23026 states have internal predecessors, (33377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:58,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23027 states to 23027 states and 33377 transitions. [2021-11-12 23:29:58,331 INFO L78 Accepts]: Start accepts. Automaton has 23027 states and 33377 transitions. Word has length 71 [2021-11-12 23:29:58,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:58,331 INFO L470 AbstractCegarLoop]: Abstraction has 23027 states and 33377 transitions. [2021-11-12 23:29:58,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:58,331 INFO L276 IsEmpty]: Start isEmpty. Operand 23027 states and 33377 transitions. [2021-11-12 23:29:58,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-12 23:29:58,332 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:58,332 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:58,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-12 23:29:58,332 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:29:58,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:58,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1953622663, now seen corresponding path program 1 times [2021-11-12 23:29:58,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:29:58,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785658990] [2021-11-12 23:29:58,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:58,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:29:58,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:59,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:29:59,068 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:29:59,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785658990] [2021-11-12 23:29:59,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785658990] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:59,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:29:59,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-12 23:29:59,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263000640] [2021-11-12 23:29:59,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:59,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-12 23:29:59,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:29:59,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-12 23:29:59,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:29:59,070 INFO L87 Difference]: Start difference. First operand 23027 states and 33377 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:03,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:03,431 INFO L93 Difference]: Finished difference Result 41544 states and 60343 transitions. [2021-11-12 23:30:03,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 23:30:03,431 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-12 23:30:03,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:03,495 INFO L225 Difference]: With dead ends: 41544 [2021-11-12 23:30:03,495 INFO L226 Difference]: Without dead ends: 41542 [2021-11-12 23:30:03,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2021-11-12 23:30:03,505 INFO L933 BasicCegarLoop]: 377 mSDtfsCounter, 853 mSDsluCounter, 1569 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 493.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 853 SdHoareTripleChecker+Valid, 1924 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.07ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 587.29ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:03,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [853 Valid, 1924 Invalid, 860 Unknown, 0 Unchecked, 5.07ms Time], IncrementalHoareTripleChecker [23 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 587.29ms Time] [2021-11-12 23:30:03,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41542 states. [2021-11-12 23:30:05,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41542 to 26181. [2021-11-12 23:30:05,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26181 states, 26180 states have (on average 1.4517188693659282) internal successors, (38006), 26180 states have internal predecessors, (38006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:05,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26181 states to 26181 states and 38006 transitions. [2021-11-12 23:30:05,774 INFO L78 Accepts]: Start accepts. Automaton has 26181 states and 38006 transitions. Word has length 71 [2021-11-12 23:30:05,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:05,774 INFO L470 AbstractCegarLoop]: Abstraction has 26181 states and 38006 transitions. [2021-11-12 23:30:05,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:05,775 INFO L276 IsEmpty]: Start isEmpty. Operand 26181 states and 38006 transitions. [2021-11-12 23:30:05,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-12 23:30:05,776 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:05,777 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:05,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-12 23:30:05,777 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:30:05,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:05,777 INFO L85 PathProgramCache]: Analyzing trace with hash 2146355673, now seen corresponding path program 1 times [2021-11-12 23:30:05,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:30:05,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271715428] [2021-11-12 23:30:05,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:05,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:30:05,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:06,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:30:06,730 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:30:06,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271715428] [2021-11-12 23:30:06,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271715428] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:06,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:30:06,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-12 23:30:06,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986132695] [2021-11-12 23:30:06,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:06,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-12 23:30:06,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:30:06,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-12 23:30:06,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-11-12 23:30:06,732 INFO L87 Difference]: Start difference. First operand 26181 states and 38006 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:11,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:11,571 INFO L93 Difference]: Finished difference Result 42135 states and 61188 transitions. [2021-11-12 23:30:11,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-12 23:30:11,571 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-12 23:30:11,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:11,622 INFO L225 Difference]: With dead ends: 42135 [2021-11-12 23:30:11,623 INFO L226 Difference]: Without dead ends: 40149 [2021-11-12 23:30:11,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2021-11-12 23:30:11,631 INFO L933 BasicCegarLoop]: 362 mSDtfsCounter, 695 mSDsluCounter, 2867 mSDsCounter, 0 mSdLazyCounter, 1344 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 803.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 695 SdHoareTripleChecker+Valid, 3189 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.44ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 944.35ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:11,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [695 Valid, 3189 Invalid, 1364 Unknown, 0 Unchecked, 7.44ms Time], IncrementalHoareTripleChecker [20 Valid, 1344 Invalid, 0 Unknown, 0 Unchecked, 944.35ms Time] [2021-11-12 23:30:11,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40149 states. [2021-11-12 23:30:13,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40149 to 26185. [2021-11-12 23:30:13,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26185 states, 26184 states have (on average 1.451726245035136) internal successors, (38012), 26184 states have internal predecessors, (38012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:13,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26185 states to 26185 states and 38012 transitions. [2021-11-12 23:30:13,906 INFO L78 Accepts]: Start accepts. Automaton has 26185 states and 38012 transitions. Word has length 71 [2021-11-12 23:30:13,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:13,906 INFO L470 AbstractCegarLoop]: Abstraction has 26185 states and 38012 transitions. [2021-11-12 23:30:13,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:13,907 INFO L276 IsEmpty]: Start isEmpty. Operand 26185 states and 38012 transitions. [2021-11-12 23:30:13,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-12 23:30:13,908 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:13,908 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:13,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-12 23:30:13,909 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:30:13,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:13,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1967659435, now seen corresponding path program 1 times [2021-11-12 23:30:13,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:30:13,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248471918] [2021-11-12 23:30:13,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:13,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:30:13,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:13,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:30:13,943 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:30:13,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248471918] [2021-11-12 23:30:13,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248471918] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:13,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:30:13,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:30:13,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622254037] [2021-11-12 23:30:13,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:13,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:30:13,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:30:13,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:30:13,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:30:13,945 INFO L87 Difference]: Start difference. First operand 26185 states and 38012 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:16,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:16,220 INFO L93 Difference]: Finished difference Result 44953 states and 65362 transitions. [2021-11-12 23:30:16,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:30:16,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-12 23:30:16,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:16,244 INFO L225 Difference]: With dead ends: 44953 [2021-11-12 23:30:16,244 INFO L226 Difference]: Without dead ends: 20099 [2021-11-12 23:30:16,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:30:16,267 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 138 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.86ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.86ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:16,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 366 Invalid, 43 Unknown, 0 Unchecked, 0.86ms Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 47.86ms Time] [2021-11-12 23:30:16,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20099 states. [2021-11-12 23:30:17,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20099 to 19823. [2021-11-12 23:30:17,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19823 states, 19822 states have (on average 1.446725860155383) internal successors, (28677), 19822 states have internal predecessors, (28677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:18,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19823 states to 19823 states and 28677 transitions. [2021-11-12 23:30:18,017 INFO L78 Accepts]: Start accepts. Automaton has 19823 states and 28677 transitions. Word has length 72 [2021-11-12 23:30:18,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:18,017 INFO L470 AbstractCegarLoop]: Abstraction has 19823 states and 28677 transitions. [2021-11-12 23:30:18,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:18,017 INFO L276 IsEmpty]: Start isEmpty. Operand 19823 states and 28677 transitions. [2021-11-12 23:30:18,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-12 23:30:18,018 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:18,018 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:18,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-12 23:30:18,019 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:30:18,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:18,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1683717221, now seen corresponding path program 1 times [2021-11-12 23:30:18,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:30:18,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159827339] [2021-11-12 23:30:18,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:18,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:30:18,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:18,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:30:18,049 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:30:18,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159827339] [2021-11-12 23:30:18,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159827339] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:18,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:30:18,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:30:18,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615643010] [2021-11-12 23:30:18,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:18,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:30:18,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:30:18,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:30:18,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:30:18,052 INFO L87 Difference]: Start difference. First operand 19823 states and 28677 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:19,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:19,842 INFO L93 Difference]: Finished difference Result 34234 states and 49704 transitions. [2021-11-12 23:30:19,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:30:19,842 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-12 23:30:19,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:19,867 INFO L225 Difference]: With dead ends: 34234 [2021-11-12 23:30:19,867 INFO L226 Difference]: Without dead ends: 19217 [2021-11-12 23:30:19,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:30:19,884 INFO L933 BasicCegarLoop]: 264 mSDtfsCounter, 139 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.67ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.58ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:19,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 364 Invalid, 47 Unknown, 0 Unchecked, 0.67ms Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 41.58ms Time] [2021-11-12 23:30:19,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19217 states. [2021-11-12 23:30:21,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19217 to 19215. [2021-11-12 23:30:21,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19215 states, 19214 states have (on average 1.4453003018632247) internal successors, (27770), 19214 states have internal predecessors, (27770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:21,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19215 states to 19215 states and 27770 transitions. [2021-11-12 23:30:21,563 INFO L78 Accepts]: Start accepts. Automaton has 19215 states and 27770 transitions. Word has length 72 [2021-11-12 23:30:21,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:21,564 INFO L470 AbstractCegarLoop]: Abstraction has 19215 states and 27770 transitions. [2021-11-12 23:30:21,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:21,564 INFO L276 IsEmpty]: Start isEmpty. Operand 19215 states and 27770 transitions. [2021-11-12 23:30:21,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-12 23:30:21,566 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:21,566 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:21,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-12 23:30:21,567 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:30:21,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:21,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1176192105, now seen corresponding path program 1 times [2021-11-12 23:30:21,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:30:21,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210550196] [2021-11-12 23:30:21,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:21,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:30:21,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:21,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:30:21,599 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:30:21,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210550196] [2021-11-12 23:30:21,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210550196] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:21,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:30:21,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:30:21,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169721557] [2021-11-12 23:30:21,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:21,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:30:21,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:30:21,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:30:21,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:30:21,601 INFO L87 Difference]: Start difference. First operand 19215 states and 27770 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:23,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:23,585 INFO L93 Difference]: Finished difference Result 33218 states and 48135 transitions. [2021-11-12 23:30:23,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:30:23,585 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-12 23:30:23,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:23,612 INFO L225 Difference]: With dead ends: 33218 [2021-11-12 23:30:23,612 INFO L226 Difference]: Without dead ends: 18520 [2021-11-12 23:30:23,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:30:23,627 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 143 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.83ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.59ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:23,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 352 Invalid, 49 Unknown, 0 Unchecked, 0.83ms Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 48.59ms Time] [2021-11-12 23:30:23,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18520 states. [2021-11-12 23:30:25,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18520 to 18518. [2021-11-12 23:30:25,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18518 states, 18517 states have (on average 1.4434843657179888) internal successors, (26729), 18517 states have internal predecessors, (26729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:25,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18518 states to 18518 states and 26729 transitions. [2021-11-12 23:30:25,301 INFO L78 Accepts]: Start accepts. Automaton has 18518 states and 26729 transitions. Word has length 72 [2021-11-12 23:30:25,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:25,302 INFO L470 AbstractCegarLoop]: Abstraction has 18518 states and 26729 transitions. [2021-11-12 23:30:25,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:25,302 INFO L276 IsEmpty]: Start isEmpty. Operand 18518 states and 26729 transitions. [2021-11-12 23:30:25,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-12 23:30:25,303 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:25,304 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:25,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-12 23:30:25,304 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:30:25,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:25,305 INFO L85 PathProgramCache]: Analyzing trace with hash 2060278430, now seen corresponding path program 1 times [2021-11-12 23:30:25,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:30:25,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134529787] [2021-11-12 23:30:25,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:25,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:30:25,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:25,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:30:25,337 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:30:25,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134529787] [2021-11-12 23:30:25,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134529787] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:25,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:30:25,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:30:25,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428182728] [2021-11-12 23:30:25,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:25,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:30:25,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:30:25,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:30:25,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:30:25,339 INFO L87 Difference]: Start difference. First operand 18518 states and 26729 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:27,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:27,471 INFO L93 Difference]: Finished difference Result 33538 states and 48564 transitions. [2021-11-12 23:30:27,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:30:27,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-12 23:30:27,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:27,493 INFO L225 Difference]: With dead ends: 33538 [2021-11-12 23:30:27,493 INFO L226 Difference]: Without dead ends: 17865 [2021-11-12 23:30:27,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:30:27,508 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 134 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.87ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.09ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:27,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 352 Invalid, 48 Unknown, 0 Unchecked, 0.87ms Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 49.09ms Time] [2021-11-12 23:30:27,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17865 states. [2021-11-12 23:30:29,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17865 to 17863. [2021-11-12 23:30:29,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17863 states, 17862 states have (on average 1.4422237151494794) internal successors, (25761), 17862 states have internal predecessors, (25761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:29,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17863 states to 17863 states and 25761 transitions. [2021-11-12 23:30:29,141 INFO L78 Accepts]: Start accepts. Automaton has 17863 states and 25761 transitions. Word has length 72 [2021-11-12 23:30:29,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:29,142 INFO L470 AbstractCegarLoop]: Abstraction has 17863 states and 25761 transitions. [2021-11-12 23:30:29,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:29,142 INFO L276 IsEmpty]: Start isEmpty. Operand 17863 states and 25761 transitions. [2021-11-12 23:30:29,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-12 23:30:29,144 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:29,144 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:29,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-12 23:30:29,145 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:30:29,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:29,145 INFO L85 PathProgramCache]: Analyzing trace with hash 976251533, now seen corresponding path program 1 times [2021-11-12 23:30:29,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:30:29,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44437673] [2021-11-12 23:30:29,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:29,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:30:29,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:30,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:30:30,989 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:30:30,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44437673] [2021-11-12 23:30:30,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44437673] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:30,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:30:30,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-11-12 23:30:30,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923173471] [2021-11-12 23:30:30,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:30,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-12 23:30:30,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:30:30,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-12 23:30:30,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-11-12 23:30:30,991 INFO L87 Difference]: Start difference. First operand 17863 states and 25761 transitions. Second operand has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:36,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:36,386 INFO L93 Difference]: Finished difference Result 22568 states and 32450 transitions. [2021-11-12 23:30:36,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-12 23:30:36,386 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-12 23:30:36,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:36,424 INFO L225 Difference]: With dead ends: 22568 [2021-11-12 23:30:36,424 INFO L226 Difference]: Without dead ends: 22566 [2021-11-12 23:30:36,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=388, Invalid=1682, Unknown=0, NotChecked=0, Total=2070 [2021-11-12 23:30:36,434 INFO L933 BasicCegarLoop]: 300 mSDtfsCounter, 1192 mSDsluCounter, 3755 mSDsCounter, 0 mSdLazyCounter, 2291 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1480.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1192 SdHoareTripleChecker+Valid, 4038 SdHoareTripleChecker+Invalid, 2322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.23ms SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1708.26ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:36,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1192 Valid, 4038 Invalid, 2322 Unknown, 0 Unchecked, 11.23ms Time], IncrementalHoareTripleChecker [31 Valid, 2291 Invalid, 0 Unknown, 0 Unchecked, 1708.26ms Time] [2021-11-12 23:30:36,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22566 states. [2021-11-12 23:30:38,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22566 to 17869. [2021-11-12 23:30:38,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17869 states, 17868 states have (on average 1.442131184239982) internal successors, (25768), 17868 states have internal predecessors, (25768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:38,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17869 states to 17869 states and 25768 transitions. [2021-11-12 23:30:38,294 INFO L78 Accepts]: Start accepts. Automaton has 17869 states and 25768 transitions. Word has length 73 [2021-11-12 23:30:38,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:38,294 INFO L470 AbstractCegarLoop]: Abstraction has 17869 states and 25768 transitions. [2021-11-12 23:30:38,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:38,294 INFO L276 IsEmpty]: Start isEmpty. Operand 17869 states and 25768 transitions. [2021-11-12 23:30:38,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-12 23:30:38,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:38,296 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:38,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-12 23:30:38,296 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:30:38,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:38,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1876133613, now seen corresponding path program 1 times [2021-11-12 23:30:38,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:30:38,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879133353] [2021-11-12 23:30:38,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:38,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:30:38,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:39,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:30:39,849 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:30:39,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879133353] [2021-11-12 23:30:39,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879133353] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:39,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:30:39,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-11-12 23:30:39,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896891146] [2021-11-12 23:30:39,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:39,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-12 23:30:39,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:30:39,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-12 23:30:39,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-11-12 23:30:39,851 INFO L87 Difference]: Start difference. First operand 17869 states and 25768 transitions. Second operand has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:46,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:46,209 INFO L93 Difference]: Finished difference Result 24127 states and 34780 transitions. [2021-11-12 23:30:46,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-12 23:30:46,209 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-12 23:30:46,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:46,242 INFO L225 Difference]: With dead ends: 24127 [2021-11-12 23:30:46,242 INFO L226 Difference]: Without dead ends: 22365 [2021-11-12 23:30:46,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=365, Invalid=1527, Unknown=0, NotChecked=0, Total=1892 [2021-11-12 23:30:46,249 INFO L933 BasicCegarLoop]: 377 mSDtfsCounter, 1244 mSDsluCounter, 4527 mSDsCounter, 0 mSdLazyCounter, 3564 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2289.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1244 SdHoareTripleChecker+Valid, 4855 SdHoareTripleChecker+Invalid, 3598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.94ms SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 3564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2669.82ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:46,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1244 Valid, 4855 Invalid, 3598 Unknown, 0 Unchecked, 16.94ms Time], IncrementalHoareTripleChecker [34 Valid, 3564 Invalid, 0 Unknown, 0 Unchecked, 2669.82ms Time] [2021-11-12 23:30:46,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22365 states. [2021-11-12 23:30:48,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22365 to 18669. [2021-11-12 23:30:48,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18669 states, 18668 states have (on average 1.440807799442897) internal successors, (26897), 18668 states have internal predecessors, (26897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:48,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18669 states to 18669 states and 26897 transitions. [2021-11-12 23:30:48,134 INFO L78 Accepts]: Start accepts. Automaton has 18669 states and 26897 transitions. Word has length 73 [2021-11-12 23:30:48,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:48,134 INFO L470 AbstractCegarLoop]: Abstraction has 18669 states and 26897 transitions. [2021-11-12 23:30:48,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:48,134 INFO L276 IsEmpty]: Start isEmpty. Operand 18669 states and 26897 transitions. [2021-11-12 23:30:48,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-12 23:30:48,135 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:48,135 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:48,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-12 23:30:48,136 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:30:48,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:48,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1885957427, now seen corresponding path program 1 times [2021-11-12 23:30:48,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:30:48,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804008313] [2021-11-12 23:30:48,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:48,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:30:48,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:49,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:30:49,558 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:30:49,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804008313] [2021-11-12 23:30:49,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804008313] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:49,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:30:49,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-11-12 23:30:49,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481719022] [2021-11-12 23:30:49,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:49,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-12 23:30:49,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:30:49,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-12 23:30:49,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-11-12 23:30:49,560 INFO L87 Difference]: Start difference. First operand 18669 states and 26897 transitions. Second operand has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:54,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:54,960 INFO L93 Difference]: Finished difference Result 21595 states and 31052 transitions. [2021-11-12 23:30:54,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-12 23:30:54,960 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-12 23:30:54,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:54,993 INFO L225 Difference]: With dead ends: 21595 [2021-11-12 23:30:54,993 INFO L226 Difference]: Without dead ends: 21593 [2021-11-12 23:30:55,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=402, Invalid=1760, Unknown=0, NotChecked=0, Total=2162 [2021-11-12 23:30:55,001 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 1316 mSDsluCounter, 2175 mSDsCounter, 0 mSdLazyCounter, 3299 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1762.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1316 SdHoareTripleChecker+Valid, 2381 SdHoareTripleChecker+Invalid, 3331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.16ms SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 3299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2060.40ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:55,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1316 Valid, 2381 Invalid, 3331 Unknown, 0 Unchecked, 12.16ms Time], IncrementalHoareTripleChecker [32 Valid, 3299 Invalid, 0 Unknown, 0 Unchecked, 2060.40ms Time] [2021-11-12 23:30:55,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21593 states. [2021-11-12 23:30:56,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21593 to 18668. [2021-11-12 23:30:57,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18668 states, 18667 states have (on average 1.4407778432527991) internal successors, (26895), 18667 states have internal predecessors, (26895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:57,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18668 states to 18668 states and 26895 transitions. [2021-11-12 23:30:57,031 INFO L78 Accepts]: Start accepts. Automaton has 18668 states and 26895 transitions. Word has length 73 [2021-11-12 23:30:57,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:57,031 INFO L470 AbstractCegarLoop]: Abstraction has 18668 states and 26895 transitions. [2021-11-12 23:30:57,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:57,032 INFO L276 IsEmpty]: Start isEmpty. Operand 18668 states and 26895 transitions. [2021-11-12 23:30:57,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-12 23:30:57,033 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:57,033 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:57,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-12 23:30:57,034 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:30:57,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:57,034 INFO L85 PathProgramCache]: Analyzing trace with hash -291184979, now seen corresponding path program 1 times [2021-11-12 23:30:57,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:30:57,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916499154] [2021-11-12 23:30:57,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:57,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:30:57,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:58,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:30:58,301 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:30:58,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916499154] [2021-11-12 23:30:58,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916499154] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:58,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:30:58,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-11-12 23:30:58,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762298218] [2021-11-12 23:30:58,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:58,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-12 23:30:58,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:30:58,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-12 23:30:58,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-11-12 23:30:58,303 INFO L87 Difference]: Start difference. First operand 18668 states and 26895 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:03,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:03,179 INFO L93 Difference]: Finished difference Result 23373 states and 33584 transitions. [2021-11-12 23:31:03,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-12 23:31:03,180 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-12 23:31:03,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:03,217 INFO L225 Difference]: With dead ends: 23373 [2021-11-12 23:31:03,217 INFO L226 Difference]: Without dead ends: 23371 [2021-11-12 23:31:03,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=354, Invalid=1452, Unknown=0, NotChecked=0, Total=1806 [2021-11-12 23:31:03,227 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 984 mSDsluCounter, 2054 mSDsCounter, 0 mSdLazyCounter, 2901 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1479.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 984 SdHoareTripleChecker+Valid, 2242 SdHoareTripleChecker+Invalid, 2921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.97ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 2901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1739.57ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:03,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [984 Valid, 2242 Invalid, 2921 Unknown, 0 Unchecked, 8.97ms Time], IncrementalHoareTripleChecker [20 Valid, 2901 Invalid, 0 Unknown, 0 Unchecked, 1739.57ms Time] [2021-11-12 23:31:03,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23371 states. [2021-11-12 23:31:05,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23371 to 18668. [2021-11-12 23:31:05,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18668 states, 18667 states have (on average 1.4407778432527991) internal successors, (26895), 18667 states have internal predecessors, (26895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:05,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18668 states to 18668 states and 26895 transitions. [2021-11-12 23:31:05,310 INFO L78 Accepts]: Start accepts. Automaton has 18668 states and 26895 transitions. Word has length 73 [2021-11-12 23:31:05,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:05,311 INFO L470 AbstractCegarLoop]: Abstraction has 18668 states and 26895 transitions. [2021-11-12 23:31:05,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:05,311 INFO L276 IsEmpty]: Start isEmpty. Operand 18668 states and 26895 transitions. [2021-11-12 23:31:05,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-12 23:31:05,313 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:05,313 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:31:05,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-12 23:31:05,313 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:31:05,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:05,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1684585715, now seen corresponding path program 1 times [2021-11-12 23:31:05,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:31:05,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505694126] [2021-11-12 23:31:05,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:05,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:31:05,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:06,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:31:06,101 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:31:06,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505694126] [2021-11-12 23:31:06,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505694126] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:31:06,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:31:06,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-12 23:31:06,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350529249] [2021-11-12 23:31:06,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:06,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-12 23:31:06,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:31:06,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-12 23:31:06,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-11-12 23:31:06,103 INFO L87 Difference]: Start difference. First operand 18668 states and 26895 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 20 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:09,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:09,300 INFO L93 Difference]: Finished difference Result 24948 states and 35922 transitions. [2021-11-12 23:31:09,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-12 23:31:09,300 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 20 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-12 23:31:09,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:09,326 INFO L225 Difference]: With dead ends: 24948 [2021-11-12 23:31:09,326 INFO L226 Difference]: Without dead ends: 23154 [2021-11-12 23:31:09,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2021-11-12 23:31:09,337 INFO L933 BasicCegarLoop]: 329 mSDtfsCounter, 839 mSDsluCounter, 1205 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 244.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 1507 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.09ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 289.42ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:09,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [839 Valid, 1507 Invalid, 383 Unknown, 0 Unchecked, 4.09ms Time], IncrementalHoareTripleChecker [28 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 289.42ms Time] [2021-11-12 23:31:09,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23154 states. [2021-11-12 23:31:11,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23154 to 18668. [2021-11-12 23:31:11,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18668 states, 18667 states have (on average 1.4407778432527991) internal successors, (26895), 18667 states have internal predecessors, (26895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:11,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18668 states to 18668 states and 26895 transitions. [2021-11-12 23:31:11,386 INFO L78 Accepts]: Start accepts. Automaton has 18668 states and 26895 transitions. Word has length 73 [2021-11-12 23:31:11,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:11,386 INFO L470 AbstractCegarLoop]: Abstraction has 18668 states and 26895 transitions. [2021-11-12 23:31:11,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 20 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:11,386 INFO L276 IsEmpty]: Start isEmpty. Operand 18668 states and 26895 transitions. [2021-11-12 23:31:11,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-12 23:31:11,388 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:11,388 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:31:11,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-12 23:31:11,388 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:31:11,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:11,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1151709459, now seen corresponding path program 1 times [2021-11-12 23:31:11,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:31:11,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486794414] [2021-11-12 23:31:11,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:11,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:31:11,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:12,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:31:12,289 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:31:12,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486794414] [2021-11-12 23:31:12,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486794414] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:31:12,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:31:12,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-12 23:31:12,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812334679] [2021-11-12 23:31:12,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:12,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-12 23:31:12,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:31:12,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-12 23:31:12,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:31:12,291 INFO L87 Difference]: Start difference. First operand 18668 states and 26895 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:16,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:16,678 INFO L93 Difference]: Finished difference Result 23352 states and 33564 transitions. [2021-11-12 23:31:16,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-12 23:31:16,678 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-12 23:31:16,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:16,715 INFO L225 Difference]: With dead ends: 23352 [2021-11-12 23:31:16,715 INFO L226 Difference]: Without dead ends: 23350 [2021-11-12 23:31:16,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=289, Invalid=1193, Unknown=0, NotChecked=0, Total=1482 [2021-11-12 23:31:16,725 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 1163 mSDsluCounter, 1603 mSDsCounter, 0 mSdLazyCounter, 2152 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1041.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1163 SdHoareTripleChecker+Valid, 1816 SdHoareTripleChecker+Invalid, 2187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.68ms SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 2152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1230.81ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:16,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1163 Valid, 1816 Invalid, 2187 Unknown, 0 Unchecked, 6.68ms Time], IncrementalHoareTripleChecker [35 Valid, 2152 Invalid, 0 Unknown, 0 Unchecked, 1230.81ms Time] [2021-11-12 23:31:16,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23350 states. [2021-11-12 23:31:18,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23350 to 18671. [2021-11-12 23:31:18,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18671 states, 18670 states have (on average 1.4407605784681308) internal successors, (26899), 18670 states have internal predecessors, (26899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:18,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18671 states to 18671 states and 26899 transitions. [2021-11-12 23:31:18,873 INFO L78 Accepts]: Start accepts. Automaton has 18671 states and 26899 transitions. Word has length 73 [2021-11-12 23:31:18,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:18,873 INFO L470 AbstractCegarLoop]: Abstraction has 18671 states and 26899 transitions. [2021-11-12 23:31:18,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:18,874 INFO L276 IsEmpty]: Start isEmpty. Operand 18671 states and 26899 transitions. [2021-11-12 23:31:18,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-12 23:31:18,875 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:18,875 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:31:18,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-12 23:31:18,876 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:31:18,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:18,876 INFO L85 PathProgramCache]: Analyzing trace with hash 443062989, now seen corresponding path program 1 times [2021-11-12 23:31:18,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:31:18,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074761865] [2021-11-12 23:31:18,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:18,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:31:18,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:20,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:31:20,546 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:31:20,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074761865] [2021-11-12 23:31:20,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074761865] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:31:20,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:31:20,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-11-12 23:31:20,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000779836] [2021-11-12 23:31:20,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:20,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-12 23:31:20,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:31:20,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-12 23:31:20,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-11-12 23:31:20,549 INFO L87 Difference]: Start difference. First operand 18671 states and 26899 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:26,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:26,517 INFO L93 Difference]: Finished difference Result 21568 states and 31025 transitions. [2021-11-12 23:31:26,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-12 23:31:26,517 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-12 23:31:26,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:26,547 INFO L225 Difference]: With dead ends: 21568 [2021-11-12 23:31:26,547 INFO L226 Difference]: Without dead ends: 21566 [2021-11-12 23:31:26,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=349, Invalid=1457, Unknown=0, NotChecked=0, Total=1806 [2021-11-12 23:31:26,555 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 1034 mSDsluCounter, 1926 mSDsCounter, 0 mSdLazyCounter, 3155 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1864.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1034 SdHoareTripleChecker+Valid, 2129 SdHoareTripleChecker+Invalid, 3174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.25ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 3155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2155.21ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:26,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1034 Valid, 2129 Invalid, 3174 Unknown, 0 Unchecked, 10.25ms Time], IncrementalHoareTripleChecker [19 Valid, 3155 Invalid, 0 Unknown, 0 Unchecked, 2155.21ms Time] [2021-11-12 23:31:26,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21566 states. [2021-11-12 23:31:28,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21566 to 18671. [2021-11-12 23:31:28,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18671 states, 18670 states have (on average 1.4407605784681308) internal successors, (26899), 18670 states have internal predecessors, (26899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:28,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18671 states to 18671 states and 26899 transitions. [2021-11-12 23:31:28,557 INFO L78 Accepts]: Start accepts. Automaton has 18671 states and 26899 transitions. Word has length 73 [2021-11-12 23:31:28,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:28,557 INFO L470 AbstractCegarLoop]: Abstraction has 18671 states and 26899 transitions. [2021-11-12 23:31:28,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:28,557 INFO L276 IsEmpty]: Start isEmpty. Operand 18671 states and 26899 transitions. [2021-11-12 23:31:28,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-12 23:31:28,558 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:28,558 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:31:28,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-12 23:31:28,559 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:31:28,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:28,559 INFO L85 PathProgramCache]: Analyzing trace with hash -118850739, now seen corresponding path program 1 times [2021-11-12 23:31:28,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:31:28,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239280616] [2021-11-12 23:31:28,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:28,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:31:28,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:30,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:31:30,436 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:31:30,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239280616] [2021-11-12 23:31:30,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239280616] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:31:30,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:31:30,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-11-12 23:31:30,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395044905] [2021-11-12 23:31:30,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:30,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-12 23:31:30,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:31:30,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-12 23:31:30,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2021-11-12 23:31:30,438 INFO L87 Difference]: Start difference. First operand 18671 states and 26899 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:36,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:36,844 INFO L93 Difference]: Finished difference Result 28650 states and 41338 transitions. [2021-11-12 23:31:36,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-12 23:31:36,844 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-12 23:31:36,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:36,879 INFO L225 Difference]: With dead ends: 28650 [2021-11-12 23:31:36,879 INFO L226 Difference]: Without dead ends: 25288 [2021-11-12 23:31:36,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=496, Invalid=1954, Unknown=0, NotChecked=0, Total=2450 [2021-11-12 23:31:36,890 INFO L933 BasicCegarLoop]: 331 mSDtfsCounter, 1113 mSDsluCounter, 3536 mSDsCounter, 0 mSdLazyCounter, 2171 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1374.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1113 SdHoareTripleChecker+Valid, 3821 SdHoareTripleChecker+Invalid, 2212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.83ms SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 2171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1592.64ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:36,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1113 Valid, 3821 Invalid, 2212 Unknown, 0 Unchecked, 9.83ms Time], IncrementalHoareTripleChecker [41 Valid, 2171 Invalid, 0 Unknown, 0 Unchecked, 1592.64ms Time] [2021-11-12 23:31:36,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25288 states. [2021-11-12 23:31:39,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25288 to 18655. [2021-11-12 23:31:39,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18655 states, 18654 states have (on average 1.4410850219792002) internal successors, (26882), 18654 states have internal predecessors, (26882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:39,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18655 states to 18655 states and 26882 transitions. [2021-11-12 23:31:39,133 INFO L78 Accepts]: Start accepts. Automaton has 18655 states and 26882 transitions. Word has length 73 [2021-11-12 23:31:39,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:39,133 INFO L470 AbstractCegarLoop]: Abstraction has 18655 states and 26882 transitions. [2021-11-12 23:31:39,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:39,133 INFO L276 IsEmpty]: Start isEmpty. Operand 18655 states and 26882 transitions. [2021-11-12 23:31:39,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-12 23:31:39,134 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:39,134 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:31:39,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-12 23:31:39,135 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:31:39,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:39,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1264760051, now seen corresponding path program 1 times [2021-11-12 23:31:39,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:31:39,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048259185] [2021-11-12 23:31:39,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:39,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:31:39,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:41,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:31:41,204 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:31:41,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048259185] [2021-11-12 23:31:41,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048259185] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:31:41,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:31:41,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-11-12 23:31:41,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317270050] [2021-11-12 23:31:41,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:41,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-12 23:31:41,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:31:41,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-12 23:31:41,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-11-12 23:31:41,207 INFO L87 Difference]: Start difference. First operand 18655 states and 26882 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:48,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:48,243 INFO L93 Difference]: Finished difference Result 21565 states and 31021 transitions. [2021-11-12 23:31:48,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-12 23:31:48,243 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-12 23:31:48,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:48,272 INFO L225 Difference]: With dead ends: 21565 [2021-11-12 23:31:48,273 INFO L226 Difference]: Without dead ends: 21563 [2021-11-12 23:31:48,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=412, Invalid=1568, Unknown=0, NotChecked=0, Total=1980 [2021-11-12 23:31:48,281 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 896 mSDsluCounter, 3096 mSDsCounter, 0 mSdLazyCounter, 4023 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2298.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 SdHoareTripleChecker+Valid, 3423 SdHoareTripleChecker+Invalid, 4041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.28ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 4023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2659.82ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:48,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [896 Valid, 3423 Invalid, 4041 Unknown, 0 Unchecked, 14.28ms Time], IncrementalHoareTripleChecker [18 Valid, 4023 Invalid, 0 Unknown, 0 Unchecked, 2659.82ms Time] [2021-11-12 23:31:48,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21563 states. [2021-11-12 23:31:50,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21563 to 18654. [2021-11-12 23:31:50,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18654 states, 18653 states have (on average 1.441055058167587) internal successors, (26880), 18653 states have internal predecessors, (26880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:50,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18654 states to 18654 states and 26880 transitions. [2021-11-12 23:31:50,536 INFO L78 Accepts]: Start accepts. Automaton has 18654 states and 26880 transitions. Word has length 73 [2021-11-12 23:31:50,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:50,536 INFO L470 AbstractCegarLoop]: Abstraction has 18654 states and 26880 transitions. [2021-11-12 23:31:50,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:50,536 INFO L276 IsEmpty]: Start isEmpty. Operand 18654 states and 26880 transitions. [2021-11-12 23:31:50,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-12 23:31:50,537 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:50,537 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:31:50,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-12 23:31:50,537 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:31:50,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:50,538 INFO L85 PathProgramCache]: Analyzing trace with hash 192158284, now seen corresponding path program 1 times [2021-11-12 23:31:50,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:31:50,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787721904] [2021-11-12 23:31:50,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:50,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:31:50,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:50,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:31:50,568 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:31:50,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787721904] [2021-11-12 23:31:50,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787721904] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:31:50,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:31:50,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:31:50,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561582723] [2021-11-12 23:31:50,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:50,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:31:50,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:31:50,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:31:50,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:31:50,570 INFO L87 Difference]: Start difference. First operand 18654 states and 26880 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:52,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:52,782 INFO L93 Difference]: Finished difference Result 35288 states and 51041 transitions. [2021-11-12 23:31:52,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:31:52,782 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-12 23:31:52,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:52,810 INFO L225 Difference]: With dead ends: 35288 [2021-11-12 23:31:52,810 INFO L226 Difference]: Without dead ends: 18056 [2021-11-12 23:31:52,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:31:52,829 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 124 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.72ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:52,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 356 Invalid, 46 Unknown, 0 Unchecked, 0.72ms Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 46.00ms Time] [2021-11-12 23:31:52,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18056 states. [2021-11-12 23:31:54,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18056 to 18054. [2021-11-12 23:31:54,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18054 states, 18053 states have (on average 1.4392621724921066) internal successors, (25983), 18053 states have internal predecessors, (25983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:55,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18054 states to 18054 states and 25983 transitions. [2021-11-12 23:31:55,010 INFO L78 Accepts]: Start accepts. Automaton has 18054 states and 25983 transitions. Word has length 74 [2021-11-12 23:31:55,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:55,010 INFO L470 AbstractCegarLoop]: Abstraction has 18054 states and 25983 transitions. [2021-11-12 23:31:55,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:55,011 INFO L276 IsEmpty]: Start isEmpty. Operand 18054 states and 25983 transitions. [2021-11-12 23:31:55,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-12 23:31:55,012 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:55,012 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:31:55,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-12 23:31:55,012 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:31:55,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:55,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1044845345, now seen corresponding path program 1 times [2021-11-12 23:31:55,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:31:55,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094035908] [2021-11-12 23:31:55,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:55,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:31:55,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:58,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:31:58,505 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:31:58,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094035908] [2021-11-12 23:31:58,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094035908] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:31:58,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:31:58,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-11-12 23:31:58,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605451663] [2021-11-12 23:31:58,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:58,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-12 23:31:58,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:31:58,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-12 23:31:58,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-11-12 23:31:58,507 INFO L87 Difference]: Start difference. First operand 18054 states and 25983 transitions. Second operand has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:32:08,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:32:08,833 INFO L93 Difference]: Finished difference Result 20874 states and 29975 transitions. [2021-11-12 23:32:08,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-12 23:32:08,834 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-12 23:32:08,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:32:08,860 INFO L225 Difference]: With dead ends: 20874 [2021-11-12 23:32:08,861 INFO L226 Difference]: Without dead ends: 20872 [2021-11-12 23:32:08,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=608, Invalid=2472, Unknown=0, NotChecked=0, Total=3080 [2021-11-12 23:32:08,868 INFO L933 BasicCegarLoop]: 313 mSDtfsCounter, 1090 mSDsluCounter, 3091 mSDsCounter, 0 mSdLazyCounter, 5471 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3972.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1090 SdHoareTripleChecker+Valid, 3399 SdHoareTripleChecker+Invalid, 5498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.88ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 5471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4514.57ms IncrementalHoareTripleChecker+Time [2021-11-12 23:32:08,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1090 Valid, 3399 Invalid, 5498 Unknown, 0 Unchecked, 17.88ms Time], IncrementalHoareTripleChecker [27 Valid, 5471 Invalid, 0 Unknown, 0 Unchecked, 4514.57ms Time] [2021-11-12 23:32:08,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20872 states. [2021-11-12 23:32:11,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20872 to 18054. [2021-11-12 23:32:11,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18054 states, 18053 states have (on average 1.4392621724921066) internal successors, (25983), 18053 states have internal predecessors, (25983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:32:11,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18054 states to 18054 states and 25983 transitions. [2021-11-12 23:32:11,047 INFO L78 Accepts]: Start accepts. Automaton has 18054 states and 25983 transitions. Word has length 75 [2021-11-12 23:32:11,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:32:11,048 INFO L470 AbstractCegarLoop]: Abstraction has 18054 states and 25983 transitions. [2021-11-12 23:32:11,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:32:11,048 INFO L276 IsEmpty]: Start isEmpty. Operand 18054 states and 25983 transitions. [2021-11-12 23:32:11,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-12 23:32:11,049 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:32:11,049 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:32:11,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-12 23:32:11,050 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:32:11,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:32:11,050 INFO L85 PathProgramCache]: Analyzing trace with hash -2012461247, now seen corresponding path program 1 times [2021-11-12 23:32:11,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:32:11,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468926992] [2021-11-12 23:32:11,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:32:11,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:32:11,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:32:14,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:32:14,950 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:32:14,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468926992] [2021-11-12 23:32:14,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468926992] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:32:14,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:32:14,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-11-12 23:32:14,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237516280] [2021-11-12 23:32:14,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:32:14,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-12 23:32:14,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:32:14,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-12 23:32:14,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2021-11-12 23:32:14,952 INFO L87 Difference]: Start difference. First operand 18054 states and 25983 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:32:27,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:32:27,099 INFO L93 Difference]: Finished difference Result 20845 states and 29946 transitions. [2021-11-12 23:32:27,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-12 23:32:27,100 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-12 23:32:27,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:32:27,124 INFO L225 Difference]: With dead ends: 20845 [2021-11-12 23:32:27,124 INFO L226 Difference]: Without dead ends: 20843 [2021-11-12 23:32:27,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=863, Invalid=3297, Unknown=0, NotChecked=0, Total=4160 [2021-11-12 23:32:27,131 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 1438 mSDsluCounter, 4078 mSDsCounter, 0 mSdLazyCounter, 6658 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4664.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1438 SdHoareTripleChecker+Valid, 4474 SdHoareTripleChecker+Invalid, 6697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.88ms SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 6658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5311.60ms IncrementalHoareTripleChecker+Time [2021-11-12 23:32:27,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1438 Valid, 4474 Invalid, 6697 Unknown, 0 Unchecked, 22.88ms Time], IncrementalHoareTripleChecker [39 Valid, 6658 Invalid, 0 Unknown, 0 Unchecked, 5311.60ms Time] [2021-11-12 23:32:27,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20843 states. [2021-11-12 23:32:29,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20843 to 18054. [2021-11-12 23:32:29,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18054 states, 18053 states have (on average 1.4392621724921066) internal successors, (25983), 18053 states have internal predecessors, (25983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:32:29,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18054 states to 18054 states and 25983 transitions. [2021-11-12 23:32:29,377 INFO L78 Accepts]: Start accepts. Automaton has 18054 states and 25983 transitions. Word has length 75 [2021-11-12 23:32:29,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:32:29,377 INFO L470 AbstractCegarLoop]: Abstraction has 18054 states and 25983 transitions. [2021-11-12 23:32:29,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:32:29,377 INFO L276 IsEmpty]: Start isEmpty. Operand 18054 states and 25983 transitions. [2021-11-12 23:32:29,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-12 23:32:29,378 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:32:29,379 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:32:29,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-12 23:32:29,379 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:32:29,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:32:29,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1112579167, now seen corresponding path program 1 times [2021-11-12 23:32:29,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:32:29,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450314653] [2021-11-12 23:32:29,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:32:29,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:32:29,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:32:32,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:32:32,523 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:32:32,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450314653] [2021-11-12 23:32:32,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450314653] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:32:32,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:32:32,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-11-12 23:32:32,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922014445] [2021-11-12 23:32:32,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:32:32,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-12 23:32:32,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:32:32,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-12 23:32:32,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2021-11-12 23:32:32,525 INFO L87 Difference]: Start difference. First operand 18054 states and 25983 transitions. Second operand has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:32:41,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:32:41,897 INFO L93 Difference]: Finished difference Result 21391 states and 30769 transitions. [2021-11-12 23:32:41,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-12 23:32:41,897 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-12 23:32:41,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:32:41,925 INFO L225 Difference]: With dead ends: 21391 [2021-11-12 23:32:41,926 INFO L226 Difference]: Without dead ends: 19693 [2021-11-12 23:32:41,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=643, Invalid=2437, Unknown=0, NotChecked=0, Total=3080 [2021-11-12 23:32:41,932 INFO L933 BasicCegarLoop]: 340 mSDtfsCounter, 1046 mSDsluCounter, 2955 mSDsCounter, 0 mSdLazyCounter, 3871 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2581.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1046 SdHoareTripleChecker+Valid, 3287 SdHoareTripleChecker+Invalid, 3906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.77ms SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 3871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2961.68ms IncrementalHoareTripleChecker+Time [2021-11-12 23:32:41,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1046 Valid, 3287 Invalid, 3906 Unknown, 0 Unchecked, 14.77ms Time], IncrementalHoareTripleChecker [35 Valid, 3871 Invalid, 0 Unknown, 0 Unchecked, 2961.68ms Time] [2021-11-12 23:32:41,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19693 states. [2021-11-12 23:32:44,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19693 to 18044. [2021-11-12 23:32:44,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18044 states, 18043 states have (on average 1.4395056254503131) internal successors, (25973), 18043 states have internal predecessors, (25973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:32:44,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18044 states to 18044 states and 25973 transitions. [2021-11-12 23:32:44,070 INFO L78 Accepts]: Start accepts. Automaton has 18044 states and 25973 transitions. Word has length 75 [2021-11-12 23:32:44,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:32:44,071 INFO L470 AbstractCegarLoop]: Abstraction has 18044 states and 25973 transitions. [2021-11-12 23:32:44,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:32:44,071 INFO L276 IsEmpty]: Start isEmpty. Operand 18044 states and 25973 transitions. [2021-11-12 23:32:44,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-12 23:32:44,072 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:32:44,072 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:32:44,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-12 23:32:44,072 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:32:44,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:32:44,073 INFO L85 PathProgramCache]: Analyzing trace with hash -579702911, now seen corresponding path program 1 times [2021-11-12 23:32:44,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:32:44,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287934207] [2021-11-12 23:32:44,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:32:44,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:32:44,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:32:47,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:32:47,868 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:32:47,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287934207] [2021-11-12 23:32:47,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287934207] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:32:47,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:32:47,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-11-12 23:32:47,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346431736] [2021-11-12 23:32:47,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:32:47,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-12 23:32:47,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:32:47,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-12 23:32:47,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-11-12 23:32:47,870 INFO L87 Difference]: Start difference. First operand 18044 states and 25973 transitions. Second operand has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:32:57,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:32:57,867 INFO L93 Difference]: Finished difference Result 20828 states and 29926 transitions. [2021-11-12 23:32:57,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-12 23:32:57,868 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-12 23:32:57,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:32:57,902 INFO L225 Difference]: With dead ends: 20828 [2021-11-12 23:32:57,902 INFO L226 Difference]: Without dead ends: 20826 [2021-11-12 23:32:57,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=639, Invalid=2331, Unknown=0, NotChecked=0, Total=2970 [2021-11-12 23:32:57,911 INFO L933 BasicCegarLoop]: 335 mSDtfsCounter, 980 mSDsluCounter, 3276 mSDsCounter, 0 mSdLazyCounter, 4613 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3232.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 980 SdHoareTripleChecker+Valid, 3603 SdHoareTripleChecker+Invalid, 4643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.85ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 4613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3691.76ms IncrementalHoareTripleChecker+Time [2021-11-12 23:32:57,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [980 Valid, 3603 Invalid, 4643 Unknown, 0 Unchecked, 14.85ms Time], IncrementalHoareTripleChecker [30 Valid, 4613 Invalid, 0 Unknown, 0 Unchecked, 3691.76ms Time] [2021-11-12 23:32:57,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20826 states. [2021-11-12 23:33:00,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20826 to 18040. [2021-11-12 23:33:00,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18040 states, 18039 states have (on average 1.4395476467653419) internal successors, (25968), 18039 states have internal predecessors, (25968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:33:00,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18040 states to 18040 states and 25968 transitions. [2021-11-12 23:33:00,164 INFO L78 Accepts]: Start accepts. Automaton has 18040 states and 25968 transitions. Word has length 75 [2021-11-12 23:33:00,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:33:00,165 INFO L470 AbstractCegarLoop]: Abstraction has 18040 states and 25968 transitions. [2021-11-12 23:33:00,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:33:00,165 INFO L276 IsEmpty]: Start isEmpty. Operand 18040 states and 25968 transitions. [2021-11-12 23:33:00,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-12 23:33:00,166 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:33:00,166 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:33:00,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-11-12 23:33:00,166 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:33:00,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:33:00,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1015069537, now seen corresponding path program 1 times [2021-11-12 23:33:00,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:33:00,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535725589] [2021-11-12 23:33:00,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:00,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:33:00,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:03,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:33:03,694 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:33:03,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535725589] [2021-11-12 23:33:03,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535725589] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:33:03,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:33:03,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-11-12 23:33:03,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913362039] [2021-11-12 23:33:03,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:33:03,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-12 23:33:03,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:33:03,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-12 23:33:03,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2021-11-12 23:33:03,696 INFO L87 Difference]: Start difference. First operand 18040 states and 25968 transitions. Second operand has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:33:14,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:33:14,727 INFO L93 Difference]: Finished difference Result 22680 states and 32566 transitions. [2021-11-12 23:33:14,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-12 23:33:14,727 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-12 23:33:14,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:33:14,762 INFO L225 Difference]: With dead ends: 22680 [2021-11-12 23:33:14,762 INFO L226 Difference]: Without dead ends: 22678 [2021-11-12 23:33:14,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=612, Invalid=2580, Unknown=0, NotChecked=0, Total=3192 [2021-11-12 23:33:14,770 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 1306 mSDsluCounter, 3073 mSDsCounter, 0 mSdLazyCounter, 5266 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4032.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1306 SdHoareTripleChecker+Valid, 3327 SdHoareTripleChecker+Invalid, 5296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.18ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 5266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4571.82ms IncrementalHoareTripleChecker+Time [2021-11-12 23:33:14,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1306 Valid, 3327 Invalid, 5296 Unknown, 0 Unchecked, 17.18ms Time], IncrementalHoareTripleChecker [30 Valid, 5266 Invalid, 0 Unknown, 0 Unchecked, 4571.82ms Time] [2021-11-12 23:33:14,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22678 states. [2021-11-12 23:33:17,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22678 to 18030. [2021-11-12 23:33:17,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18030 states, 18029 states have (on average 1.4396805147262743) internal successors, (25956), 18029 states have internal predecessors, (25956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:33:17,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18030 states to 18030 states and 25956 transitions. [2021-11-12 23:33:17,107 INFO L78 Accepts]: Start accepts. Automaton has 18030 states and 25956 transitions. Word has length 75 [2021-11-12 23:33:17,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:33:17,107 INFO L470 AbstractCegarLoop]: Abstraction has 18030 states and 25956 transitions. [2021-11-12 23:33:17,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:33:17,108 INFO L276 IsEmpty]: Start isEmpty. Operand 18030 states and 25956 transitions. [2021-11-12 23:33:17,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-12 23:33:17,109 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:33:17,109 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:33:17,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-12 23:33:17,110 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:33:17,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:33:17,110 INFO L85 PathProgramCache]: Analyzing trace with hash -2069982507, now seen corresponding path program 1 times [2021-11-12 23:33:17,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:33:17,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976930216] [2021-11-12 23:33:17,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:17,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:33:17,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:26,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:33:26,220 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:33:26,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976930216] [2021-11-12 23:33:26,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976930216] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:33:26,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:33:26,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2021-11-12 23:33:26,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829536931] [2021-11-12 23:33:26,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:33:26,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-12 23:33:26,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:33:26,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-12 23:33:26,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1679, Unknown=0, NotChecked=0, Total=1806 [2021-11-12 23:33:26,223 INFO L87 Difference]: Start difference. First operand 18030 states and 25956 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:33:47,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:33:47,174 INFO L93 Difference]: Finished difference Result 20843 states and 29943 transitions. [2021-11-12 23:33:47,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-12 23:33:47,174 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-12 23:33:47,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:33:47,197 INFO L225 Difference]: With dead ends: 20843 [2021-11-12 23:33:47,197 INFO L226 Difference]: Without dead ends: 20841 [2021-11-12 23:33:47,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=1228, Invalid=4322, Unknown=0, NotChecked=0, Total=5550 [2021-11-12 23:33:47,202 INFO L933 BasicCegarLoop]: 356 mSDtfsCounter, 1372 mSDsluCounter, 5935 mSDsCounter, 0 mSdLazyCounter, 4592 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4210.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1372 SdHoareTripleChecker+Valid, 6282 SdHoareTripleChecker+Invalid, 4619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.80ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 4592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4742.34ms IncrementalHoareTripleChecker+Time [2021-11-12 23:33:47,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1372 Valid, 6282 Invalid, 4619 Unknown, 0 Unchecked, 21.80ms Time], IncrementalHoareTripleChecker [27 Valid, 4592 Invalid, 0 Unknown, 0 Unchecked, 4742.34ms Time] [2021-11-12 23:33:47,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20841 states. [2021-11-12 23:33:49,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20841 to 18000. [2021-11-12 23:33:49,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18000 states, 17999 states have (on average 1.4402466803711318) internal successors, (25923), 17999 states have internal predecessors, (25923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:33:49,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18000 states to 18000 states and 25923 transitions. [2021-11-12 23:33:49,430 INFO L78 Accepts]: Start accepts. Automaton has 18000 states and 25923 transitions. Word has length 77 [2021-11-12 23:33:49,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:33:49,431 INFO L470 AbstractCegarLoop]: Abstraction has 18000 states and 25923 transitions. [2021-11-12 23:33:49,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:33:49,431 INFO L276 IsEmpty]: Start isEmpty. Operand 18000 states and 25923 transitions. [2021-11-12 23:33:49,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-12 23:33:49,434 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:33:49,435 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:33:49,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-11-12 23:33:49,435 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:33:49,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:33:49,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1315945786, now seen corresponding path program 1 times [2021-11-12 23:33:49,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:33:49,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180152019] [2021-11-12 23:33:49,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:49,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:33:49,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:49,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:33:49,487 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:33:49,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180152019] [2021-11-12 23:33:49,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180152019] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:33:49,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:33:49,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:33:49,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675746325] [2021-11-12 23:33:49,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:33:49,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:33:49,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:33:49,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:33:49,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:33:49,489 INFO L87 Difference]: Start difference. First operand 18000 states and 25923 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:33:52,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:33:52,135 INFO L93 Difference]: Finished difference Result 28661 states and 41650 transitions. [2021-11-12 23:33:52,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:33:52,136 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-12 23:33:52,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:33:52,162 INFO L225 Difference]: With dead ends: 28661 [2021-11-12 23:33:52,162 INFO L226 Difference]: Without dead ends: 22051 [2021-11-12 23:33:52,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:33:52,172 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 97 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.62ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.01ms IncrementalHoareTripleChecker+Time [2021-11-12 23:33:52,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 408 Invalid, 28 Unknown, 0 Unchecked, 0.62ms Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 33.01ms Time] [2021-11-12 23:33:52,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22051 states. [2021-11-12 23:33:54,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22051 to 21017. [2021-11-12 23:33:54,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21017 states, 21016 states have (on average 1.4406642558051008) internal successors, (30277), 21016 states have internal predecessors, (30277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:33:54,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21017 states to 21017 states and 30277 transitions. [2021-11-12 23:33:54,802 INFO L78 Accepts]: Start accepts. Automaton has 21017 states and 30277 transitions. Word has length 80 [2021-11-12 23:33:54,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:33:54,802 INFO L470 AbstractCegarLoop]: Abstraction has 21017 states and 30277 transitions. [2021-11-12 23:33:54,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:33:54,803 INFO L276 IsEmpty]: Start isEmpty. Operand 21017 states and 30277 transitions. [2021-11-12 23:33:54,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-12 23:33:54,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:33:54,805 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:33:54,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-11-12 23:33:54,805 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:33:54,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:33:54,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1912914459, now seen corresponding path program 1 times [2021-11-12 23:33:54,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:33:54,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937967953] [2021-11-12 23:33:54,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:54,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:33:54,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:54,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:33:54,850 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:33:54,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937967953] [2021-11-12 23:33:54,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937967953] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:33:54,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:33:54,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:33:54,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858916058] [2021-11-12 23:33:54,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:33:54,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:33:54,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:33:54,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:33:54,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:33:54,852 INFO L87 Difference]: Start difference. First operand 21017 states and 30277 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:33:58,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:33:58,036 INFO L93 Difference]: Finished difference Result 36117 states and 52491 transitions. [2021-11-12 23:33:58,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:33:58,037 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-12 23:33:58,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:33:58,074 INFO L225 Difference]: With dead ends: 36117 [2021-11-12 23:33:58,074 INFO L226 Difference]: Without dead ends: 26579 [2021-11-12 23:33:58,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:33:58,085 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 92 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.63ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.07ms IncrementalHoareTripleChecker+Time [2021-11-12 23:33:58,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 390 Invalid, 28 Unknown, 0 Unchecked, 0.63ms Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 34.07ms Time] [2021-11-12 23:33:58,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26579 states. [2021-11-12 23:34:01,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26579 to 25137. [2021-11-12 23:34:01,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25137 states, 25136 states have (on average 1.4403644175684278) internal successors, (36205), 25136 states have internal predecessors, (36205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:34:01,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25137 states to 25137 states and 36205 transitions. [2021-11-12 23:34:01,191 INFO L78 Accepts]: Start accepts. Automaton has 25137 states and 36205 transitions. Word has length 83 [2021-11-12 23:34:01,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:34:01,191 INFO L470 AbstractCegarLoop]: Abstraction has 25137 states and 36205 transitions. [2021-11-12 23:34:01,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:34:01,191 INFO L276 IsEmpty]: Start isEmpty. Operand 25137 states and 36205 transitions. [2021-11-12 23:34:01,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-12 23:34:01,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:34:01,194 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:34:01,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-11-12 23:34:01,194 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:34:01,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:34:01,195 INFO L85 PathProgramCache]: Analyzing trace with hash -422625049, now seen corresponding path program 1 times [2021-11-12 23:34:01,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:34:01,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515350584] [2021-11-12 23:34:01,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:34:01,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:34:01,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:34:01,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:34:01,240 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:34:01,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515350584] [2021-11-12 23:34:01,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515350584] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:34:01,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:34:01,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:34:01,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062347333] [2021-11-12 23:34:01,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:34:01,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:34:01,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:34:01,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:34:01,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:34:01,242 INFO L87 Difference]: Start difference. First operand 25137 states and 36205 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:34:05,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:34:05,273 INFO L93 Difference]: Finished difference Result 46645 states and 67697 transitions. [2021-11-12 23:34:05,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:34:05,274 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-12 23:34:05,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:34:05,315 INFO L225 Difference]: With dead ends: 46645 [2021-11-12 23:34:05,315 INFO L226 Difference]: Without dead ends: 33211 [2021-11-12 23:34:05,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:34:05,329 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 87 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.69ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.48ms IncrementalHoareTripleChecker+Time [2021-11-12 23:34:05,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 371 Invalid, 29 Unknown, 0 Unchecked, 0.69ms Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 34.48ms Time] [2021-11-12 23:34:05,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33211 states. [2021-11-12 23:34:09,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33211 to 31097. [2021-11-12 23:34:09,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31097 states, 31096 states have (on average 1.4377090301003344) internal successors, (44707), 31096 states have internal predecessors, (44707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:34:09,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31097 states to 31097 states and 44707 transitions. [2021-11-12 23:34:09,267 INFO L78 Accepts]: Start accepts. Automaton has 31097 states and 44707 transitions. Word has length 86 [2021-11-12 23:34:09,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:34:09,267 INFO L470 AbstractCegarLoop]: Abstraction has 31097 states and 44707 transitions. [2021-11-12 23:34:09,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:34:09,268 INFO L276 IsEmpty]: Start isEmpty. Operand 31097 states and 44707 transitions. [2021-11-12 23:34:09,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-12 23:34:09,271 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:34:09,271 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:34:09,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-11-12 23:34:09,271 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:34:09,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:34:09,272 INFO L85 PathProgramCache]: Analyzing trace with hash -383437107, now seen corresponding path program 1 times [2021-11-12 23:34:09,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:34:09,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224206645] [2021-11-12 23:34:09,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:34:09,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:34:09,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:34:09,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:34:09,323 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:34:09,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224206645] [2021-11-12 23:34:09,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224206645] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:34:09,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:34:09,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:34:09,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141844171] [2021-11-12 23:34:09,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:34:09,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:34:09,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:34:09,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:34:09,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:34:09,325 INFO L87 Difference]: Start difference. First operand 31097 states and 44707 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:34:14,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:34:14,655 INFO L93 Difference]: Finished difference Result 65875 states and 95161 transitions. [2021-11-12 23:34:14,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:34:14,656 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-12 23:34:14,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:34:14,718 INFO L225 Difference]: With dead ends: 65875 [2021-11-12 23:34:14,718 INFO L226 Difference]: Without dead ends: 43921 [2021-11-12 23:34:14,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:34:14,739 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 82 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.64ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.25ms IncrementalHoareTripleChecker+Time [2021-11-12 23:34:14,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 352 Invalid, 30 Unknown, 0 Unchecked, 0.64ms Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 32.25ms Time] [2021-11-12 23:34:14,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43921 states. [2021-11-12 23:34:19,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43921 to 40763. [2021-11-12 23:34:19,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40763 states, 40762 states have (on average 1.431701094156322) internal successors, (58359), 40762 states have internal predecessors, (58359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:34:20,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40763 states to 40763 states and 58359 transitions. [2021-11-12 23:34:20,057 INFO L78 Accepts]: Start accepts. Automaton has 40763 states and 58359 transitions. Word has length 89 [2021-11-12 23:34:20,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:34:20,057 INFO L470 AbstractCegarLoop]: Abstraction has 40763 states and 58359 transitions. [2021-11-12 23:34:20,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:34:20,058 INFO L276 IsEmpty]: Start isEmpty. Operand 40763 states and 58359 transitions. [2021-11-12 23:34:20,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-12 23:34:20,062 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:34:20,062 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:34:20,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-11-12 23:34:20,063 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:34:20,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:34:20,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1707759731, now seen corresponding path program 1 times [2021-11-12 23:34:20,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:34:20,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795060917] [2021-11-12 23:34:20,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:34:20,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:34:20,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:34:20,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:34:20,107 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:34:20,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795060917] [2021-11-12 23:34:20,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795060917] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:34:20,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:34:20,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:34:20,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28728908] [2021-11-12 23:34:20,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:34:20,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:34:20,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:34:20,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:34:20,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:34:20,109 INFO L87 Difference]: Start difference. First operand 40763 states and 58359 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:34:28,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:34:28,132 INFO L93 Difference]: Finished difference Result 97209 states and 139553 transitions. [2021-11-12 23:34:28,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:34:28,132 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-12 23:34:28,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:34:28,250 INFO L225 Difference]: With dead ends: 97209 [2021-11-12 23:34:28,250 INFO L226 Difference]: Without dead ends: 59837 [2021-11-12 23:34:28,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:34:28,279 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 79 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.71ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.57ms IncrementalHoareTripleChecker+Time [2021-11-12 23:34:28,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 353 Invalid, 28 Unknown, 0 Unchecked, 0.71ms Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 32.57ms Time] [2021-11-12 23:34:28,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59837 states.