./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30403c3c-cc8c-4e2b-aed2-5d58e52d3ba5/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30403c3c-cc8c-4e2b-aed2-5d58e52d3ba5/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30403c3c-cc8c-4e2b-aed2-5d58e52d3ba5/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30403c3c-cc8c-4e2b-aed2-5d58e52d3ba5/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30403c3c-cc8c-4e2b-aed2-5d58e52d3ba5/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30403c3c-cc8c-4e2b-aed2-5d58e52d3ba5/bin/utaipan-UbGMyvGFUs --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 a7fe14b036c76813552f56a0b0f6fa4a7e816ada4aa4a291eafd4277fae7b99b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:58:47,458 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:58:47,461 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:58:47,513 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:58:47,514 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:58:47,519 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:58:47,521 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:58:47,525 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:58:47,527 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:58:47,535 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:58:47,536 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:58:47,538 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:58:47,538 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:58:47,541 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:58:47,544 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:58:47,550 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:58:47,552 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:58:47,553 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:58:47,556 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:58:47,564 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:58:47,566 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:58:47,568 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:58:47,571 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:58:47,572 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:58:47,582 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:58:47,583 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:58:47,584 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:58:47,586 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:58:47,587 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:58:47,589 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:58:47,589 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:58:47,590 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:58:47,593 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:58:47,595 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:58:47,597 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:58:47,597 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:58:47,598 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:58:47,598 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:58:47,599 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:58:47,600 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:58:47,601 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:58:47,602 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30403c3c-cc8c-4e2b-aed2-5d58e52d3ba5/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 13:58:47,650 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:58:47,650 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:58:47,652 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:58:47,652 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:58:47,652 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:58:47,653 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:58:47,653 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:58:47,653 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:58:47,660 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:58:47,660 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:58:47,661 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:58:47,662 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:58:47,662 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:58:47,663 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:58:47,663 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:58:47,663 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:58:47,664 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:58:47,664 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:58:47,665 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:58:47,665 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:58:47,665 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:58:47,665 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:58:47,666 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:58:47,666 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:58:47,666 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:58:47,667 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:58:47,667 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:58:47,667 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:58:47,668 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:58:47,669 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:58:47,670 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:58:47,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:58:47,671 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:58:47,671 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:58:47,671 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:58:47,672 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:58:47,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:58:47,672 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:58:47,672 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:58:47,673 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:58:47,673 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_30403c3c-cc8c-4e2b-aed2-5d58e52d3ba5/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30403c3c-cc8c-4e2b-aed2-5d58e52d3ba5/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a7fe14b036c76813552f56a0b0f6fa4a7e816ada4aa4a291eafd4277fae7b99b [2021-11-19 13:58:48,049 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:58:48,082 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:58:48,086 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:58:48,087 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:58:48,088 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:58:48,090 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30403c3c-cc8c-4e2b-aed2-5d58e52d3ba5/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-19 13:58:48,208 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30403c3c-cc8c-4e2b-aed2-5d58e52d3ba5/bin/utaipan-UbGMyvGFUs/data/e7f4f5d28/74036331320c4fa9b74b1ff800e94a11/FLAGe5ce5aa24 [2021-11-19 13:58:48,829 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:58:48,830 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30403c3c-cc8c-4e2b-aed2-5d58e52d3ba5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-19 13:58:48,853 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30403c3c-cc8c-4e2b-aed2-5d58e52d3ba5/bin/utaipan-UbGMyvGFUs/data/e7f4f5d28/74036331320c4fa9b74b1ff800e94a11/FLAGe5ce5aa24 [2021-11-19 13:58:49,049 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30403c3c-cc8c-4e2b-aed2-5d58e52d3ba5/bin/utaipan-UbGMyvGFUs/data/e7f4f5d28/74036331320c4fa9b74b1ff800e94a11 [2021-11-19 13:58:49,051 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:58:49,053 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:58:49,066 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:58:49,066 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:58:49,070 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:58:49,073 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:58:49" (1/1) ... [2021-11-19 13:58:49,074 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d2f8345 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:58:49, skipping insertion in model container [2021-11-19 13:58:49,074 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:58:49" (1/1) ... [2021-11-19 13:58:49,081 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:58:49,168 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:58:49,504 WARN L230 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_30403c3c-cc8c-4e2b-aed2-5d58e52d3ba5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[8893,8906] [2021-11-19 13:58:49,525 WARN L230 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_30403c3c-cc8c-4e2b-aed2-5d58e52d3ba5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[12165,12178] [2021-11-19 13:58:49,535 WARN L230 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_30403c3c-cc8c-4e2b-aed2-5d58e52d3ba5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[13321,13334] [2021-11-19 13:58:49,542 WARN L230 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_30403c3c-cc8c-4e2b-aed2-5d58e52d3ba5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[13977,13990] [2021-11-19 13:58:49,552 WARN L230 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_30403c3c-cc8c-4e2b-aed2-5d58e52d3ba5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[15456,15469] [2021-11-19 13:58:49,559 WARN L230 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_30403c3c-cc8c-4e2b-aed2-5d58e52d3ba5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[16112,16125] [2021-11-19 13:58:49,567 WARN L230 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_30403c3c-cc8c-4e2b-aed2-5d58e52d3ba5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[17096,17109] [2021-11-19 13:58:49,582 WARN L230 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_30403c3c-cc8c-4e2b-aed2-5d58e52d3ba5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[19392,19405] [2021-11-19 13:58:49,588 WARN L230 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_30403c3c-cc8c-4e2b-aed2-5d58e52d3ba5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[20051,20064] [2021-11-19 13:58:49,595 WARN L230 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_30403c3c-cc8c-4e2b-aed2-5d58e52d3ba5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[21033,21046] [2021-11-19 13:58:49,608 WARN L230 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_30403c3c-cc8c-4e2b-aed2-5d58e52d3ba5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[22824,22837] [2021-11-19 13:58:49,716 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:58:49,741 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:58:49,847 WARN L230 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_30403c3c-cc8c-4e2b-aed2-5d58e52d3ba5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[8893,8906] [2021-11-19 13:58:49,877 WARN L230 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_30403c3c-cc8c-4e2b-aed2-5d58e52d3ba5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[12165,12178] [2021-11-19 13:58:49,889 WARN L230 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_30403c3c-cc8c-4e2b-aed2-5d58e52d3ba5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[13321,13334] [2021-11-19 13:58:49,897 WARN L230 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_30403c3c-cc8c-4e2b-aed2-5d58e52d3ba5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[13977,13990] [2021-11-19 13:58:49,911 WARN L230 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_30403c3c-cc8c-4e2b-aed2-5d58e52d3ba5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[15456,15469] [2021-11-19 13:58:49,921 WARN L230 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_30403c3c-cc8c-4e2b-aed2-5d58e52d3ba5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[16112,16125] [2021-11-19 13:58:49,932 WARN L230 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_30403c3c-cc8c-4e2b-aed2-5d58e52d3ba5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[17096,17109] [2021-11-19 13:58:49,955 WARN L230 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_30403c3c-cc8c-4e2b-aed2-5d58e52d3ba5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[19392,19405] [2021-11-19 13:58:49,963 WARN L230 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_30403c3c-cc8c-4e2b-aed2-5d58e52d3ba5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[20051,20064] [2021-11-19 13:58:49,972 WARN L230 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_30403c3c-cc8c-4e2b-aed2-5d58e52d3ba5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[21033,21046] [2021-11-19 13:58:49,989 WARN L230 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_30403c3c-cc8c-4e2b-aed2-5d58e52d3ba5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[22824,22837] [2021-11-19 13:58:50,170 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:58:50,189 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:58:50,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:58:50 WrapperNode [2021-11-19 13:58:50,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:58:50,191 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:58:50,191 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:58:50,191 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:58:50,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:58:50" (1/1) ... [2021-11-19 13:58:50,223 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:58:50" (1/1) ... [2021-11-19 13:58:50,334 INFO L137 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1790 [2021-11-19 13:58:50,339 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:58:50,340 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:58:50,340 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:58:50,340 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:58:50,351 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:58:50" (1/1) ... [2021-11-19 13:58:50,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:58:50" (1/1) ... [2021-11-19 13:58:50,357 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:58:50" (1/1) ... [2021-11-19 13:58:50,360 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:58:50" (1/1) ... [2021-11-19 13:58:50,404 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:58:50" (1/1) ... [2021-11-19 13:58:50,421 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:58:50" (1/1) ... [2021-11-19 13:58:50,426 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:58:50" (1/1) ... [2021-11-19 13:58:50,435 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:58:50,436 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:58:50,436 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:58:50,436 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:58:50,437 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:58:50" (1/1) ... [2021-11-19 13:58:50,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:58:50,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30403c3c-cc8c-4e2b-aed2-5d58e52d3ba5/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:58:50,499 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30403c3c-cc8c-4e2b-aed2-5d58e52d3ba5/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:58:50,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30403c3c-cc8c-4e2b-aed2-5d58e52d3ba5/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:58:50,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:58:50,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 13:58:50,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:58:50,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:58:50,766 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:58:50,768 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:58:52,248 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:58:52,374 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:58:52,375 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-19 13:58:52,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:58:52 BoogieIcfgContainer [2021-11-19 13:58:52,378 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:58:52,380 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:58:52,380 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:58:52,384 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:58:52,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:58:49" (1/3) ... [2021-11-19 13:58:52,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f5ac23c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:58:52, skipping insertion in model container [2021-11-19 13:58:52,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:58:50" (2/3) ... [2021-11-19 13:58:52,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f5ac23c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:58:52, skipping insertion in model container [2021-11-19 13:58:52,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:58:52" (3/3) ... [2021-11-19 13:58:52,387 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-19 13:58:52,393 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:58:52,393 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2021-11-19 13:58:52,447 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:58:52,455 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 [2021-11-19 13:58:52,456 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-11-19 13:58:52,485 INFO L276 IsEmpty]: Start isEmpty. Operand has 336 states, 324 states have (on average 1.845679012345679) internal successors, (598), 335 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:58:52,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-19 13:58:52,500 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:58:52,501 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] [2021-11-19 13:58:52,503 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-19 13:58:52,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:58:52,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1432511949, now seen corresponding path program 1 times [2021-11-19 13:58:52,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:58:52,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106324011] [2021-11-19 13:58:52,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:58:52,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:58:52,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:58:52,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:58:52,997 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:58:52,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106324011] [2021-11-19 13:58:52,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106324011] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:58:53,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:58:53,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 13:58:53,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614789812] [2021-11-19 13:58:53,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:58:53,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:58:53,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:58:53,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:58:53,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:58:53,060 INFO L87 Difference]: Start difference. First operand has 336 states, 324 states have (on average 1.845679012345679) internal successors, (598), 335 states have internal predecessors, (598), 0 states have call successors, (0), 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 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:58:53,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:58:53,529 INFO L93 Difference]: Finished difference Result 526 states and 899 transitions. [2021-11-19 13:58:53,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:58:53,532 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 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 57 [2021-11-19 13:58:53,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:58:53,558 INFO L225 Difference]: With dead ends: 526 [2021-11-19 13:58:53,559 INFO L226 Difference]: Without dead ends: 282 [2021-11-19 13:58:53,564 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 [2021-11-19 13:58:53,569 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 1345 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1345 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:58:53,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1345 Valid, 354 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 13:58:53,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-11-19 13:58:53,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2021-11-19 13:58:53,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 271 states have (on average 1.2583025830258303) internal successors, (341), 281 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:58:53,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 341 transitions. [2021-11-19 13:58:53,664 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 341 transitions. Word has length 57 [2021-11-19 13:58:53,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:58:53,665 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 341 transitions. [2021-11-19 13:58:53,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:58:53,667 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 341 transitions. [2021-11-19 13:58:53,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-19 13:58:53,678 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:58:53,678 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] [2021-11-19 13:58:53,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 13:58:53,679 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-19 13:58:53,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:58:53,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1451472122, now seen corresponding path program 1 times [2021-11-19 13:58:53,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:58:53,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540775175] [2021-11-19 13:58:53,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:58:53,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:58:53,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:58:53,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:58:53,870 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:58:53,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540775175] [2021-11-19 13:58:53,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540775175] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:58:53,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:58:53,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 13:58:53,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422811414] [2021-11-19 13:58:53,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:58:53,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:58:53,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:58:53,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:58:53,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:58:53,880 INFO L87 Difference]: Start difference. First operand 282 states and 341 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:58:54,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:58:54,165 INFO L93 Difference]: Finished difference Result 466 states and 577 transitions. [2021-11-19 13:58:54,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:58:54,167 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2021-11-19 13:58:54,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:58:54,177 INFO L225 Difference]: With dead ends: 466 [2021-11-19 13:58:54,177 INFO L226 Difference]: Without dead ends: 262 [2021-11-19 13:58:54,182 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 [2021-11-19 13:58:54,184 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 858 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:58:54,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [858 Valid, 189 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:58:54,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-11-19 13:58:54,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2021-11-19 13:58:54,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 251 states have (on average 1.2589641434262948) internal successors, (316), 261 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:58:54,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 316 transitions. [2021-11-19 13:58:54,220 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 316 transitions. Word has length 58 [2021-11-19 13:58:54,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:58:54,221 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 316 transitions. [2021-11-19 13:58:54,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:58:54,222 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 316 transitions. [2021-11-19 13:58:54,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-19 13:58:54,223 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:58:54,223 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] [2021-11-19 13:58:54,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 13:58:54,224 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-19 13:58:54,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:58:54,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1444601844, now seen corresponding path program 1 times [2021-11-19 13:58:54,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:58:54,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882782179] [2021-11-19 13:58:54,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:58:54,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:58:54,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:58:54,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:58:54,355 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:58:54,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882782179] [2021-11-19 13:58:54,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882782179] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:58:54,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:58:54,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 13:58:54,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372052838] [2021-11-19 13:58:54,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:58:54,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:58:54,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:58:54,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:58:54,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:58:54,358 INFO L87 Difference]: Start difference. First operand 262 states and 316 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:58:54,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:58:54,552 INFO L93 Difference]: Finished difference Result 446 states and 551 transitions. [2021-11-19 13:58:54,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:58:54,553 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2021-11-19 13:58:54,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:58:54,555 INFO L225 Difference]: With dead ends: 446 [2021-11-19 13:58:54,555 INFO L226 Difference]: Without dead ends: 240 [2021-11-19 13:58:54,555 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 [2021-11-19 13:58:54,557 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 822 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 822 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:58:54,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [822 Valid, 177 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:58:54,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-11-19 13:58:54,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2021-11-19 13:58:54,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 229 states have (on average 1.2707423580786026) internal successors, (291), 239 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:58:54,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 291 transitions. [2021-11-19 13:58:54,572 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 291 transitions. Word has length 59 [2021-11-19 13:58:54,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:58:54,572 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 291 transitions. [2021-11-19 13:58:54,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:58:54,573 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 291 transitions. [2021-11-19 13:58:54,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-19 13:58:54,573 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:58:54,574 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] [2021-11-19 13:58:54,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 13:58:54,574 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-19 13:58:54,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:58:54,574 INFO L85 PathProgramCache]: Analyzing trace with hash -98923345, now seen corresponding path program 1 times [2021-11-19 13:58:54,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:58:54,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798854126] [2021-11-19 13:58:54,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:58:54,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:58:54,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:58:54,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:58:54,647 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:58:54,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798854126] [2021-11-19 13:58:54,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798854126] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:58:54,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:58:54,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 13:58:54,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063384012] [2021-11-19 13:58:54,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:58:54,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:58:54,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:58:54,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:58:54,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:58:54,650 INFO L87 Difference]: Start difference. First operand 240 states and 291 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:58:54,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:58:54,952 INFO L93 Difference]: Finished difference Result 539 states and 668 transitions. [2021-11-19 13:58:54,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:58:54,953 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2021-11-19 13:58:54,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:58:54,956 INFO L225 Difference]: With dead ends: 539 [2021-11-19 13:58:54,956 INFO L226 Difference]: Without dead ends: 341 [2021-11-19 13:58:54,956 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 [2021-11-19 13:58:54,959 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 1020 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1020 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:58:54,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1020 Valid, 257 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:58:54,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-11-19 13:58:54,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 299. [2021-11-19 13:58:54,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 288 states have (on average 1.3194444444444444) internal successors, (380), 298 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:58:54,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 380 transitions. [2021-11-19 13:58:54,990 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 380 transitions. Word has length 60 [2021-11-19 13:58:54,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:58:54,990 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 380 transitions. [2021-11-19 13:58:54,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:58:54,990 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 380 transitions. [2021-11-19 13:58:54,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-19 13:58:54,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:58:54,993 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] [2021-11-19 13:58:54,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 13:58:54,993 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-19 13:58:54,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:58:54,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1012719179, now seen corresponding path program 1 times [2021-11-19 13:58:54,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:58:54,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301435542] [2021-11-19 13:58:54,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:58:54,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:58:55,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:58:55,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:58:55,264 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:58:55,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301435542] [2021-11-19 13:58:55,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301435542] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:58:55,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:58:55,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-19 13:58:55,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707358945] [2021-11-19 13:58:55,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:58:55,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 13:58:55,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:58:55,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 13:58:55,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:58:55,266 INFO L87 Difference]: Start difference. First operand 299 states and 380 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:58:56,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:58:56,251 INFO L93 Difference]: Finished difference Result 695 states and 886 transitions. [2021-11-19 13:58:56,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 13:58:56,252 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2021-11-19 13:58:56,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:58:56,258 INFO L225 Difference]: With dead ends: 695 [2021-11-19 13:58:56,258 INFO L226 Difference]: Without dead ends: 622 [2021-11-19 13:58:56,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=488, Unknown=0, NotChecked=0, Total=650 [2021-11-19 13:58:56,261 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 1493 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1493 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:58:56,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1493 Valid, 923 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 871 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 13:58:56,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-11-19 13:58:56,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 306. [2021-11-19 13:58:56,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 295 states have (on average 1.3220338983050848) internal successors, (390), 305 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:58:56,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 390 transitions. [2021-11-19 13:58:56,307 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 390 transitions. Word has length 61 [2021-11-19 13:58:56,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:58:56,310 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 390 transitions. [2021-11-19 13:58:56,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:58:56,310 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 390 transitions. [2021-11-19 13:58:56,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-19 13:58:56,311 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:58:56,311 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] [2021-11-19 13:58:56,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 13:58:56,312 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-19 13:58:56,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:58:56,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1370051015, now seen corresponding path program 1 times [2021-11-19 13:58:56,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:58:56,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454546877] [2021-11-19 13:58:56,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:58:56,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:58:56,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:58:56,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:58:56,515 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:58:56,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454546877] [2021-11-19 13:58:56,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454546877] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:58:56,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:58:56,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 13:58:56,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823543532] [2021-11-19 13:58:56,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:58:56,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:58:56,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:58:56,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:58:56,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:58:56,518 INFO L87 Difference]: Start difference. First operand 306 states and 390 transitions. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:58:57,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:58:57,294 INFO L93 Difference]: Finished difference Result 592 states and 754 transitions. [2021-11-19 13:58:57,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 13:58:57,295 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2021-11-19 13:58:57,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:58:57,298 INFO L225 Difference]: With dead ends: 592 [2021-11-19 13:58:57,299 INFO L226 Difference]: Without dead ends: 490 [2021-11-19 13:58:57,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2021-11-19 13:58:57,300 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 1220 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1220 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:58:57,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1220 Valid, 750 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 13:58:57,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-11-19 13:58:57,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 299. [2021-11-19 13:58:57,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 288 states have (on average 1.3159722222222223) internal successors, (379), 298 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:58:57,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 379 transitions. [2021-11-19 13:58:57,344 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 379 transitions. Word has length 61 [2021-11-19 13:58:57,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:58:57,344 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 379 transitions. [2021-11-19 13:58:57,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:58:57,345 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 379 transitions. [2021-11-19 13:58:57,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-19 13:58:57,346 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:58:57,346 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] [2021-11-19 13:58:57,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 13:58:57,346 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-19 13:58:57,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:58:57,347 INFO L85 PathProgramCache]: Analyzing trace with hash 603873951, now seen corresponding path program 1 times [2021-11-19 13:58:57,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:58:57,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321430369] [2021-11-19 13:58:57,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:58:57,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:58:57,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:58:57,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:58:57,520 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:58:57,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321430369] [2021-11-19 13:58:57,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321430369] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:58:57,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:58:57,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 13:58:57,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107799703] [2021-11-19 13:58:57,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:58:57,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:58:57,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:58:57,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:58:57,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:58:57,524 INFO L87 Difference]: Start difference. First operand 299 states and 379 transitions. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:58:58,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:58:58,340 INFO L93 Difference]: Finished difference Result 692 states and 895 transitions. [2021-11-19 13:58:58,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 13:58:58,341 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2021-11-19 13:58:58,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:58:58,346 INFO L225 Difference]: With dead ends: 692 [2021-11-19 13:58:58,346 INFO L226 Difference]: Without dead ends: 612 [2021-11-19 13:58:58,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-11-19 13:58:58,348 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 961 mSDsluCounter, 877 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 961 SdHoareTripleChecker+Valid, 1095 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:58:58,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [961 Valid, 1095 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 13:58:58,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-11-19 13:58:58,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 299. [2021-11-19 13:58:58,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 288 states have (on average 1.3125) internal successors, (378), 298 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:58:58,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 378 transitions. [2021-11-19 13:58:58,385 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 378 transitions. Word has length 61 [2021-11-19 13:58:58,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:58:58,386 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 378 transitions. [2021-11-19 13:58:58,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:58:58,387 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 378 transitions. [2021-11-19 13:58:58,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-19 13:58:58,388 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:58:58,388 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] [2021-11-19 13:58:58,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-19 13:58:58,388 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-19 13:58:58,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:58:58,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1551029823, now seen corresponding path program 1 times [2021-11-19 13:58:58,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:58:58,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249701760] [2021-11-19 13:58:58,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:58:58,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:58:58,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:58:58,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:58:58,523 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:58:58,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249701760] [2021-11-19 13:58:58,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249701760] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:58:58,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:58:58,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 13:58:58,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293127399] [2021-11-19 13:58:58,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:58:58,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:58:58,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:58:58,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:58:58,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:58:58,526 INFO L87 Difference]: Start difference. First operand 299 states and 378 transitions. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:58:58,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:58:58,960 INFO L93 Difference]: Finished difference Result 573 states and 711 transitions. [2021-11-19 13:58:58,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:58:58,960 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2021-11-19 13:58:58,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:58:58,963 INFO L225 Difference]: With dead ends: 573 [2021-11-19 13:58:58,963 INFO L226 Difference]: Without dead ends: 426 [2021-11-19 13:58:58,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:58:58,964 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 1048 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1048 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:58:58,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1048 Valid, 506 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 13:58:58,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-11-19 13:58:58,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 299. [2021-11-19 13:58:58,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 288 states have (on average 1.3090277777777777) internal successors, (377), 298 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:58:58,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 377 transitions. [2021-11-19 13:58:59,000 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 377 transitions. Word has length 61 [2021-11-19 13:58:59,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:58:59,000 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 377 transitions. [2021-11-19 13:58:59,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:58:59,000 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 377 transitions. [2021-11-19 13:58:59,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-19 13:58:59,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:58:59,004 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] [2021-11-19 13:58:59,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-19 13:58:59,004 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-19 13:58:59,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:58:59,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1026541166, now seen corresponding path program 1 times [2021-11-19 13:58:59,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:58:59,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038686323] [2021-11-19 13:58:59,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:58:59,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:58:59,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:58:59,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:58:59,170 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:58:59,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038686323] [2021-11-19 13:58:59,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038686323] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:58:59,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:58:59,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 13:58:59,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790072785] [2021-11-19 13:58:59,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:58:59,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:58:59,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:58:59,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:58:59,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:58:59,172 INFO L87 Difference]: Start difference. First operand 299 states and 377 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:58:59,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:58:59,959 INFO L93 Difference]: Finished difference Result 665 states and 849 transitions. [2021-11-19 13:58:59,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 13:58:59,959 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2021-11-19 13:58:59,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:58:59,963 INFO L225 Difference]: With dead ends: 665 [2021-11-19 13:58:59,963 INFO L226 Difference]: Without dead ends: 592 [2021-11-19 13:58:59,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-11-19 13:58:59,966 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 897 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 897 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:58:59,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [897 Valid, 1005 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 13:58:59,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-11-19 13:59:00,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 299. [2021-11-19 13:59:00,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 288 states have (on average 1.3055555555555556) internal successors, (376), 298 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:00,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 376 transitions. [2021-11-19 13:59:00,003 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 376 transitions. Word has length 63 [2021-11-19 13:59:00,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:00,003 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 376 transitions. [2021-11-19 13:59:00,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:00,004 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 376 transitions. [2021-11-19 13:59:00,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-19 13:59:00,008 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:00,009 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] [2021-11-19 13:59:00,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-19 13:59:00,010 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-19 13:59:00,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:00,010 INFO L85 PathProgramCache]: Analyzing trace with hash 885655936, now seen corresponding path program 1 times [2021-11-19 13:59:00,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:59:00,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438884106] [2021-11-19 13:59:00,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:00,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:59:00,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:00,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:59:00,132 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:59:00,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438884106] [2021-11-19 13:59:00,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438884106] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:00,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:59:00,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 13:59:00,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140399383] [2021-11-19 13:59:00,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:00,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:59:00,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:59:00,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:59:00,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:59:00,133 INFO L87 Difference]: Start difference. First operand 299 states and 376 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:00,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:00,819 INFO L93 Difference]: Finished difference Result 697 states and 896 transitions. [2021-11-19 13:59:00,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 13:59:00,820 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2021-11-19 13:59:00,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:00,824 INFO L225 Difference]: With dead ends: 697 [2021-11-19 13:59:00,824 INFO L226 Difference]: Without dead ends: 612 [2021-11-19 13:59:00,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-11-19 13:59:00,826 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 639 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:00,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [639 Valid, 987 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 13:59:00,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-11-19 13:59:00,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 299. [2021-11-19 13:59:00,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 288 states have (on average 1.3020833333333333) internal successors, (375), 298 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:00,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 375 transitions. [2021-11-19 13:59:00,868 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 375 transitions. Word has length 63 [2021-11-19 13:59:00,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:00,868 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 375 transitions. [2021-11-19 13:59:00,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:00,869 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 375 transitions. [2021-11-19 13:59:00,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-19 13:59:00,870 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:00,870 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] [2021-11-19 13:59:00,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-19 13:59:00,871 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-19 13:59:00,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:00,872 INFO L85 PathProgramCache]: Analyzing trace with hash -515644867, now seen corresponding path program 1 times [2021-11-19 13:59:00,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:59:00,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222345395] [2021-11-19 13:59:00,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:00,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:59:00,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:01,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:59:01,034 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:59:01,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222345395] [2021-11-19 13:59:01,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222345395] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:01,035 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:59:01,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 13:59:01,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028983314] [2021-11-19 13:59:01,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:01,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:59:01,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:59:01,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:59:01,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:59:01,037 INFO L87 Difference]: Start difference. First operand 299 states and 375 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:01,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:01,783 INFO L93 Difference]: Finished difference Result 662 states and 844 transitions. [2021-11-19 13:59:01,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 13:59:01,784 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2021-11-19 13:59:01,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:01,789 INFO L225 Difference]: With dead ends: 662 [2021-11-19 13:59:01,789 INFO L226 Difference]: Without dead ends: 592 [2021-11-19 13:59:01,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-11-19 13:59:01,791 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 922 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 SdHoareTripleChecker+Valid, 1025 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:01,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [922 Valid, 1025 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 13:59:01,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-11-19 13:59:01,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 299. [2021-11-19 13:59:01,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 288 states have (on average 1.2986111111111112) internal successors, (374), 298 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:01,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 374 transitions. [2021-11-19 13:59:01,836 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 374 transitions. Word has length 63 [2021-11-19 13:59:01,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:01,837 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 374 transitions. [2021-11-19 13:59:01,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:01,837 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 374 transitions. [2021-11-19 13:59:01,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-19 13:59:01,838 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:01,839 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] [2021-11-19 13:59:01,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-19 13:59:01,839 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-19 13:59:01,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:01,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1781677741, now seen corresponding path program 1 times [2021-11-19 13:59:01,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:59:01,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168552547] [2021-11-19 13:59:01,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:01,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:59:01,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:01,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:59:01,967 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:59:01,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168552547] [2021-11-19 13:59:01,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168552547] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:01,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:59:01,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 13:59:01,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870454958] [2021-11-19 13:59:01,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:01,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:59:01,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:59:01,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:59:01,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:59:01,969 INFO L87 Difference]: Start difference. First operand 299 states and 374 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:02,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:02,674 INFO L93 Difference]: Finished difference Result 597 states and 753 transitions. [2021-11-19 13:59:02,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 13:59:02,675 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2021-11-19 13:59:02,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:02,678 INFO L225 Difference]: With dead ends: 597 [2021-11-19 13:59:02,678 INFO L226 Difference]: Without dead ends: 592 [2021-11-19 13:59:02,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-11-19 13:59:02,680 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 1015 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1015 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:02,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1015 Valid, 864 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 13:59:02,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-11-19 13:59:02,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 299. [2021-11-19 13:59:02,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 288 states have (on average 1.2951388888888888) internal successors, (373), 298 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:02,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 373 transitions. [2021-11-19 13:59:02,720 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 373 transitions. Word has length 63 [2021-11-19 13:59:02,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:02,720 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 373 transitions. [2021-11-19 13:59:02,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:02,721 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 373 transitions. [2021-11-19 13:59:02,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-19 13:59:02,722 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:02,722 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] [2021-11-19 13:59:02,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-19 13:59:02,723 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-19 13:59:02,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:02,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1022850411, now seen corresponding path program 1 times [2021-11-19 13:59:02,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:59:02,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883307662] [2021-11-19 13:59:02,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:02,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:59:02,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:02,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:59:02,930 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:59:02,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883307662] [2021-11-19 13:59:02,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883307662] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:02,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:59:02,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-19 13:59:02,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104702049] [2021-11-19 13:59:02,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:02,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 13:59:02,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:59:02,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 13:59:02,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:59:02,933 INFO L87 Difference]: Start difference. First operand 299 states and 373 transitions. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:03,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:03,819 INFO L93 Difference]: Finished difference Result 545 states and 695 transitions. [2021-11-19 13:59:03,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 13:59:03,820 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2021-11-19 13:59:03,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:03,822 INFO L225 Difference]: With dead ends: 545 [2021-11-19 13:59:03,822 INFO L226 Difference]: Without dead ends: 413 [2021-11-19 13:59:03,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-11-19 13:59:03,824 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 1073 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1073 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:03,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1073 Valid, 942 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 13:59:03,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-11-19 13:59:03,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 299. [2021-11-19 13:59:03,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 288 states have (on average 1.2881944444444444) internal successors, (371), 298 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:03,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 371 transitions. [2021-11-19 13:59:03,865 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 371 transitions. Word has length 63 [2021-11-19 13:59:03,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:03,866 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 371 transitions. [2021-11-19 13:59:03,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:03,866 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 371 transitions. [2021-11-19 13:59:03,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-19 13:59:03,867 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:03,868 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] [2021-11-19 13:59:03,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-19 13:59:03,868 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-19 13:59:03,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:03,869 INFO L85 PathProgramCache]: Analyzing trace with hash 100501655, now seen corresponding path program 1 times [2021-11-19 13:59:03,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:59:03,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498556649] [2021-11-19 13:59:03,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:03,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:59:03,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:03,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:59:03,976 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:59:03,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498556649] [2021-11-19 13:59:03,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498556649] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:03,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:59:03,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 13:59:03,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025838890] [2021-11-19 13:59:03,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:03,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:59:03,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:59:03,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:59:03,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:59:03,978 INFO L87 Difference]: Start difference. First operand 299 states and 371 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:04,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:04,763 INFO L93 Difference]: Finished difference Result 597 states and 749 transitions. [2021-11-19 13:59:04,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 13:59:04,764 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2021-11-19 13:59:04,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:04,767 INFO L225 Difference]: With dead ends: 597 [2021-11-19 13:59:04,768 INFO L226 Difference]: Without dead ends: 592 [2021-11-19 13:59:04,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-11-19 13:59:04,770 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 878 mSDsluCounter, 877 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 878 SdHoareTripleChecker+Valid, 1107 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:04,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [878 Valid, 1107 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 849 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 13:59:04,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-11-19 13:59:04,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 299. [2021-11-19 13:59:04,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 288 states have (on average 1.28125) internal successors, (369), 298 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:04,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 369 transitions. [2021-11-19 13:59:04,815 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 369 transitions. Word has length 63 [2021-11-19 13:59:04,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:04,815 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 369 transitions. [2021-11-19 13:59:04,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:04,816 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 369 transitions. [2021-11-19 13:59:04,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-19 13:59:04,816 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:04,817 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] [2021-11-19 13:59:04,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-19 13:59:04,817 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-19 13:59:04,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:04,818 INFO L85 PathProgramCache]: Analyzing trace with hash 2012698757, now seen corresponding path program 1 times [2021-11-19 13:59:04,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:59:04,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037185564] [2021-11-19 13:59:04,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:04,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:59:04,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:04,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:59:04,928 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:59:04,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037185564] [2021-11-19 13:59:04,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037185564] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:04,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:59:04,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 13:59:04,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324905175] [2021-11-19 13:59:04,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:04,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:59:04,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:59:04,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:59:04,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:59:04,931 INFO L87 Difference]: Start difference. First operand 299 states and 369 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:05,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:05,655 INFO L93 Difference]: Finished difference Result 629 states and 795 transitions. [2021-11-19 13:59:05,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 13:59:05,656 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2021-11-19 13:59:05,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:05,659 INFO L225 Difference]: With dead ends: 629 [2021-11-19 13:59:05,659 INFO L226 Difference]: Without dead ends: 612 [2021-11-19 13:59:05,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-11-19 13:59:05,664 INFO L933 BasicCegarLoop]: 311 mSDtfsCounter, 665 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 665 SdHoareTripleChecker+Valid, 1219 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:05,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [665 Valid, 1219 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 13:59:05,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-11-19 13:59:05,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 299. [2021-11-19 13:59:05,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 288 states have (on average 1.2743055555555556) internal successors, (367), 298 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:05,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 367 transitions. [2021-11-19 13:59:05,710 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 367 transitions. Word has length 63 [2021-11-19 13:59:05,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:05,711 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 367 transitions. [2021-11-19 13:59:05,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:05,711 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 367 transitions. [2021-11-19 13:59:05,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-19 13:59:05,712 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:05,713 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] [2021-11-19 13:59:05,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-19 13:59:05,713 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-19 13:59:05,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:05,714 INFO L85 PathProgramCache]: Analyzing trace with hash -522081681, now seen corresponding path program 1 times [2021-11-19 13:59:05,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:59:05,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204006546] [2021-11-19 13:59:05,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:05,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:59:05,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:06,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:59:06,631 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:59:06,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204006546] [2021-11-19 13:59:06,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204006546] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:06,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:59:06,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-11-19 13:59:06,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926258855] [2021-11-19 13:59:06,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:06,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-19 13:59:06,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:59:06,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-19 13:59:06,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-11-19 13:59:06,634 INFO L87 Difference]: Start difference. First operand 299 states and 367 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:09,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:09,848 INFO L93 Difference]: Finished difference Result 698 states and 851 transitions. [2021-11-19 13:59:09,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-19 13:59:09,849 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-11-19 13:59:09,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:09,854 INFO L225 Difference]: With dead ends: 698 [2021-11-19 13:59:09,854 INFO L226 Difference]: Without dead ends: 626 [2021-11-19 13:59:09,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=342, Invalid=1550, Unknown=0, NotChecked=0, Total=1892 [2021-11-19 13:59:09,856 INFO L933 BasicCegarLoop]: 392 mSDtfsCounter, 1421 mSDsluCounter, 4668 mSDsCounter, 0 mSdLazyCounter, 2582 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1421 SdHoareTripleChecker+Valid, 5008 SdHoareTripleChecker+Invalid, 2663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:09,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1421 Valid, 5008 Invalid, 2663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2582 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-19 13:59:09,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-11-19 13:59:09,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 310. [2021-11-19 13:59:09,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 299 states have (on average 1.274247491638796) internal successors, (381), 309 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:09,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 381 transitions. [2021-11-19 13:59:09,918 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 381 transitions. Word has length 65 [2021-11-19 13:59:09,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:09,919 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 381 transitions. [2021-11-19 13:59:09,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:09,919 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 381 transitions. [2021-11-19 13:59:09,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-19 13:59:09,920 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:09,921 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] [2021-11-19 13:59:09,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-19 13:59:09,921 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-19 13:59:09,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:09,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1992368467, now seen corresponding path program 1 times [2021-11-19 13:59:09,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:59:09,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993482455] [2021-11-19 13:59:09,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:09,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:59:09,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:10,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:59:10,258 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:59:10,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993482455] [2021-11-19 13:59:10,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993482455] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:10,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:59:10,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-19 13:59:10,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636963570] [2021-11-19 13:59:10,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:10,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 13:59:10,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:59:10,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 13:59:10,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:59:10,261 INFO L87 Difference]: Start difference. First operand 310 states and 381 transitions. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:10,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:10,911 INFO L93 Difference]: Finished difference Result 614 states and 748 transitions. [2021-11-19 13:59:10,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 13:59:10,912 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-11-19 13:59:10,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:10,915 INFO L225 Difference]: With dead ends: 614 [2021-11-19 13:59:10,915 INFO L226 Difference]: Without dead ends: 472 [2021-11-19 13:59:10,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:59:10,916 INFO L933 BasicCegarLoop]: 298 mSDtfsCounter, 1238 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1238 SdHoareTripleChecker+Valid, 1046 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:10,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1238 Valid, 1046 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:59:10,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-11-19 13:59:10,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 236. [2021-11-19 13:59:10,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 229 states have (on average 1.2663755458515285) internal successors, (290), 235 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:10,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 290 transitions. [2021-11-19 13:59:10,965 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 290 transitions. Word has length 65 [2021-11-19 13:59:10,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:10,965 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 290 transitions. [2021-11-19 13:59:10,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:10,966 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 290 transitions. [2021-11-19 13:59:10,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-19 13:59:10,967 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:10,967 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] [2021-11-19 13:59:10,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-19 13:59:10,967 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-19 13:59:10,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:10,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1614163178, now seen corresponding path program 1 times [2021-11-19 13:59:10,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:59:10,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318947020] [2021-11-19 13:59:10,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:10,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:59:11,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:11,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:59:11,360 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:59:11,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318947020] [2021-11-19 13:59:11,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318947020] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:11,361 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:59:11,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-19 13:59:11,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021296643] [2021-11-19 13:59:11,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:11,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:59:11,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:59:11,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:59:11,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:59:11,363 INFO L87 Difference]: Start difference. First operand 236 states and 290 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:12,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:12,221 INFO L93 Difference]: Finished difference Result 623 states and 774 transitions. [2021-11-19 13:59:12,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 13:59:12,222 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-11-19 13:59:12,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:12,225 INFO L225 Difference]: With dead ends: 623 [2021-11-19 13:59:12,225 INFO L226 Difference]: Without dead ends: 549 [2021-11-19 13:59:12,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-11-19 13:59:12,226 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 1181 mSDsluCounter, 1331 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1181 SdHoareTripleChecker+Valid, 1480 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:12,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1181 Valid, 1480 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 13:59:12,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-11-19 13:59:12,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 226. [2021-11-19 13:59:12,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 220 states have (on average 1.25) internal successors, (275), 225 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:12,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 275 transitions. [2021-11-19 13:59:12,279 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 275 transitions. Word has length 65 [2021-11-19 13:59:12,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:12,280 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 275 transitions. [2021-11-19 13:59:12,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:12,280 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 275 transitions. [2021-11-19 13:59:12,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-19 13:59:12,281 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:12,281 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] [2021-11-19 13:59:12,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-19 13:59:12,282 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-19 13:59:12,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:12,282 INFO L85 PathProgramCache]: Analyzing trace with hash 234306004, now seen corresponding path program 1 times [2021-11-19 13:59:12,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:59:12,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111183076] [2021-11-19 13:59:12,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:12,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:59:12,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:12,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:59:12,626 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:59:12,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111183076] [2021-11-19 13:59:12,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111183076] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:12,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:59:12,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-19 13:59:12,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925714424] [2021-11-19 13:59:12,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:12,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:59:12,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:59:12,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:59:12,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:59:12,628 INFO L87 Difference]: Start difference. First operand 226 states and 275 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:13,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:13,420 INFO L93 Difference]: Finished difference Result 486 states and 619 transitions. [2021-11-19 13:59:13,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 13:59:13,421 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-11-19 13:59:13,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:13,425 INFO L225 Difference]: With dead ends: 486 [2021-11-19 13:59:13,425 INFO L226 Difference]: Without dead ends: 376 [2021-11-19 13:59:13,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2021-11-19 13:59:13,428 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 611 mSDsluCounter, 1224 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 1399 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:13,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [611 Valid, 1399 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:59:13,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-11-19 13:59:13,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 184. [2021-11-19 13:59:13,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 181 states have (on average 1.2320441988950277) internal successors, (223), 183 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:13,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 223 transitions. [2021-11-19 13:59:13,479 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 223 transitions. Word has length 65 [2021-11-19 13:59:13,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:13,479 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 223 transitions. [2021-11-19 13:59:13,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:13,480 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 223 transitions. [2021-11-19 13:59:13,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-19 13:59:13,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:13,481 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] [2021-11-19 13:59:13,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-19 13:59:13,481 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-19 13:59:13,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:13,482 INFO L85 PathProgramCache]: Analyzing trace with hash -785038328, now seen corresponding path program 1 times [2021-11-19 13:59:13,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:59:13,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083853257] [2021-11-19 13:59:13,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:13,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:59:13,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:13,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:59:13,587 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:59:13,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083853257] [2021-11-19 13:59:13,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083853257] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:13,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:59:13,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 13:59:13,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71967338] [2021-11-19 13:59:13,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:13,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:59:13,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:59:13,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:59:13,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:59:13,590 INFO L87 Difference]: Start difference. First operand 184 states and 223 transitions. Second operand has 8 states, 8 states have (on average 8.25) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:14,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:14,023 INFO L93 Difference]: Finished difference Result 295 states and 362 transitions. [2021-11-19 13:59:14,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 13:59:14,024 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-11-19 13:59:14,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:14,026 INFO L225 Difference]: With dead ends: 295 [2021-11-19 13:59:14,026 INFO L226 Difference]: Without dead ends: 288 [2021-11-19 13:59:14,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-11-19 13:59:14,028 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 431 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:14,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 468 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:59:14,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-11-19 13:59:14,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 184. [2021-11-19 13:59:14,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 181 states have (on average 1.2265193370165746) internal successors, (222), 183 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:14,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 222 transitions. [2021-11-19 13:59:14,083 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 222 transitions. Word has length 66 [2021-11-19 13:59:14,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:14,084 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 222 transitions. [2021-11-19 13:59:14,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:14,084 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 222 transitions. [2021-11-19 13:59:14,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-19 13:59:14,085 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:14,085 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] [2021-11-19 13:59:14,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-19 13:59:14,086 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-19 13:59:14,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:14,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1670965080, now seen corresponding path program 1 times [2021-11-19 13:59:14,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:59:14,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137922305] [2021-11-19 13:59:14,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:14,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:59:14,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:14,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:59:14,266 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:59:14,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137922305] [2021-11-19 13:59:14,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137922305] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:14,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:59:14,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-19 13:59:14,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347781372] [2021-11-19 13:59:14,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:14,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 13:59:14,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:59:14,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 13:59:14,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:59:14,268 INFO L87 Difference]: Start difference. First operand 184 states and 222 transitions. Second operand has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:15,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:15,870 INFO L93 Difference]: Finished difference Result 867 states and 1120 transitions. [2021-11-19 13:59:15,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-19 13:59:15,871 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-11-19 13:59:15,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:15,874 INFO L225 Difference]: With dead ends: 867 [2021-11-19 13:59:15,874 INFO L226 Difference]: Without dead ends: 769 [2021-11-19 13:59:15,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2021-11-19 13:59:15,877 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 1379 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1379 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:15,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1379 Valid, 779 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 13:59:15,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2021-11-19 13:59:15,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 192. [2021-11-19 13:59:15,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 189 states have (on average 1.216931216931217) internal successors, (230), 191 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:15,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 230 transitions. [2021-11-19 13:59:15,952 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 230 transitions. Word has length 66 [2021-11-19 13:59:15,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:15,952 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 230 transitions. [2021-11-19 13:59:15,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:15,953 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 230 transitions. [2021-11-19 13:59:15,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-19 13:59:15,954 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:15,954 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] [2021-11-19 13:59:15,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-19 13:59:15,954 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-19 13:59:15,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:15,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1612547898, now seen corresponding path program 1 times [2021-11-19 13:59:15,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:59:15,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844274586] [2021-11-19 13:59:15,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:15,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:59:15,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:16,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:59:16,045 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:59:16,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844274586] [2021-11-19 13:59:16,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844274586] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:16,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:59:16,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 13:59:16,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363496142] [2021-11-19 13:59:16,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:16,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:59:16,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:59:16,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:59:16,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:59:16,047 INFO L87 Difference]: Start difference. First operand 192 states and 230 transitions. Second operand has 8 states, 8 states have (on average 8.375) 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) [2021-11-19 13:59:16,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:16,513 INFO L93 Difference]: Finished difference Result 410 states and 510 transitions. [2021-11-19 13:59:16,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 13:59:16,514 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.375) 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 [2021-11-19 13:59:16,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:16,516 INFO L225 Difference]: With dead ends: 410 [2021-11-19 13:59:16,516 INFO L226 Difference]: Without dead ends: 312 [2021-11-19 13:59:16,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:59:16,519 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 378 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:16,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [378 Valid, 430 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:59:16,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-11-19 13:59:16,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 184. [2021-11-19 13:59:16,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 181 states have (on average 1.2154696132596685) internal successors, (220), 183 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:16,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 220 transitions. [2021-11-19 13:59:16,584 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 220 transitions. Word has length 67 [2021-11-19 13:59:16,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:16,585 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 220 transitions. [2021-11-19 13:59:16,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) 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) [2021-11-19 13:59:16,585 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 220 transitions. [2021-11-19 13:59:16,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-19 13:59:16,586 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:16,586 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] [2021-11-19 13:59:16,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-19 13:59:16,587 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-19 13:59:16,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:16,587 INFO L85 PathProgramCache]: Analyzing trace with hash 207320224, now seen corresponding path program 1 times [2021-11-19 13:59:16,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:59:16,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553829321] [2021-11-19 13:59:16,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:16,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:59:16,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:17,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:59:17,306 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:59:17,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553829321] [2021-11-19 13:59:17,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553829321] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:17,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:59:17,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-19 13:59:17,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407697569] [2021-11-19 13:59:17,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:17,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-19 13:59:17,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:59:17,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-19 13:59:17,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-11-19 13:59:17,309 INFO L87 Difference]: Start difference. First operand 184 states and 220 transitions. Second operand has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 22 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) [2021-11-19 13:59:19,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:19,012 INFO L93 Difference]: Finished difference Result 588 states and 747 transitions. [2021-11-19 13:59:19,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-19 13:59:19,013 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 22 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 [2021-11-19 13:59:19,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:19,016 INFO L225 Difference]: With dead ends: 588 [2021-11-19 13:59:19,016 INFO L226 Difference]: Without dead ends: 582 [2021-11-19 13:59:19,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=262, Invalid=1378, Unknown=0, NotChecked=0, Total=1640 [2021-11-19 13:59:19,019 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 540 mSDsluCounter, 3055 mSDsCounter, 0 mSdLazyCounter, 1376 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 3130 SdHoareTripleChecker+Invalid, 1404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:19,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 3130 Invalid, 1404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1376 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 13:59:19,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-11-19 13:59:19,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 195. [2021-11-19 13:59:19,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 192 states have (on average 1.21875) internal successors, (234), 194 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:19,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 234 transitions. [2021-11-19 13:59:19,087 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 234 transitions. Word has length 68 [2021-11-19 13:59:19,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:19,087 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 234 transitions. [2021-11-19 13:59:19,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 22 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) [2021-11-19 13:59:19,087 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 234 transitions. [2021-11-19 13:59:19,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-19 13:59:19,088 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:19,088 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] [2021-11-19 13:59:19,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-19 13:59:19,089 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-19 13:59:19,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:19,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1386499272, now seen corresponding path program 1 times [2021-11-19 13:59:19,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:59:19,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641871332] [2021-11-19 13:59:19,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:19,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:59:19,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:19,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:59:19,720 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:59:19,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641871332] [2021-11-19 13:59:19,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641871332] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:19,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:59:19,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 13:59:19,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396258980] [2021-11-19 13:59:19,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:19,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 13:59:19,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:59:19,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 13:59:19,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-11-19 13:59:19,722 INFO L87 Difference]: Start difference. First operand 195 states and 234 transitions. Second operand has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 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) [2021-11-19 13:59:21,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:21,182 INFO L93 Difference]: Finished difference Result 219 states and 258 transitions. [2021-11-19 13:59:21,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-19 13:59:21,183 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 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 [2021-11-19 13:59:21,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:21,184 INFO L225 Difference]: With dead ends: 219 [2021-11-19 13:59:21,184 INFO L226 Difference]: Without dead ends: 211 [2021-11-19 13:59:21,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=230, Invalid=1176, Unknown=0, NotChecked=0, Total=1406 [2021-11-19 13:59:21,189 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 343 mSDsluCounter, 1311 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 1391 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:21,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 1391 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 13:59:21,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-11-19 13:59:21,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 199. [2021-11-19 13:59:21,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 196 states have (on average 1.219387755102041) internal successors, (239), 198 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:21,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 239 transitions. [2021-11-19 13:59:21,262 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 239 transitions. Word has length 68 [2021-11-19 13:59:21,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:21,262 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 239 transitions. [2021-11-19 13:59:21,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 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) [2021-11-19 13:59:21,263 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 239 transitions. [2021-11-19 13:59:21,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-19 13:59:21,263 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:21,264 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] [2021-11-19 13:59:21,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-19 13:59:21,264 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-19 13:59:21,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:21,265 INFO L85 PathProgramCache]: Analyzing trace with hash -721471249, now seen corresponding path program 1 times [2021-11-19 13:59:21,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:59:21,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435491934] [2021-11-19 13:59:21,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:21,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:59:21,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:21,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:59:21,592 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:59:21,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435491934] [2021-11-19 13:59:21,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435491934] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:21,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:59:21,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-19 13:59:21,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217947452] [2021-11-19 13:59:21,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:21,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:59:21,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:59:21,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:59:21,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:59:21,594 INFO L87 Difference]: Start difference. First operand 199 states and 239 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 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) [2021-11-19 13:59:22,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:22,746 INFO L93 Difference]: Finished difference Result 761 states and 974 transitions. [2021-11-19 13:59:22,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-19 13:59:22,746 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 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 [2021-11-19 13:59:22,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:22,749 INFO L225 Difference]: With dead ends: 761 [2021-11-19 13:59:22,749 INFO L226 Difference]: Without dead ends: 755 [2021-11-19 13:59:22,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2021-11-19 13:59:22,751 INFO L933 BasicCegarLoop]: 301 mSDtfsCounter, 959 mSDsluCounter, 1849 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 959 SdHoareTripleChecker+Valid, 2048 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:22,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [959 Valid, 2048 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 13:59:22,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-11-19 13:59:22,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 187. [2021-11-19 13:59:22,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 185 states have (on average 1.2108108108108109) internal successors, (224), 186 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:22,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 224 transitions. [2021-11-19 13:59:22,809 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 224 transitions. Word has length 69 [2021-11-19 13:59:22,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:22,809 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 224 transitions. [2021-11-19 13:59:22,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 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) [2021-11-19 13:59:22,810 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 224 transitions. [2021-11-19 13:59:22,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-19 13:59:22,810 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:22,811 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:59:22,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-19 13:59:22,811 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-19 13:59:22,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:22,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1979676551, now seen corresponding path program 1 times [2021-11-19 13:59:22,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:59:22,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061096585] [2021-11-19 13:59:22,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:22,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:59:22,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:23,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:59:23,177 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:59:23,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061096585] [2021-11-19 13:59:23,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061096585] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:23,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:59:23,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-19 13:59:23,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33795360] [2021-11-19 13:59:23,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:23,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:59:23,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:59:23,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:59:23,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:59:23,180 INFO L87 Difference]: Start difference. First operand 187 states and 224 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 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) [2021-11-19 13:59:24,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:24,616 INFO L93 Difference]: Finished difference Result 611 states and 782 transitions. [2021-11-19 13:59:24,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-19 13:59:24,617 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 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 [2021-11-19 13:59:24,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:24,620 INFO L225 Difference]: With dead ends: 611 [2021-11-19 13:59:24,620 INFO L226 Difference]: Without dead ends: 596 [2021-11-19 13:59:24,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2021-11-19 13:59:24,622 INFO L933 BasicCegarLoop]: 302 mSDtfsCounter, 608 mSDsluCounter, 1915 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 2109 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:24,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [608 Valid, 2109 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 13:59:24,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-11-19 13:59:24,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 166. [2021-11-19 13:59:24,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.206060606060606) internal successors, (199), 165 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:24,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 199 transitions. [2021-11-19 13:59:24,684 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 199 transitions. Word has length 69 [2021-11-19 13:59:24,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:24,684 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 199 transitions. [2021-11-19 13:59:24,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 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) [2021-11-19 13:59:24,685 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 199 transitions. [2021-11-19 13:59:24,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-19 13:59:24,685 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:24,685 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:59:24,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-19 13:59:24,686 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-19 13:59:24,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:24,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1970953540, now seen corresponding path program 1 times [2021-11-19 13:59:24,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:59:24,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511235638] [2021-11-19 13:59:24,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:24,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:59:24,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:24,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:59:24,732 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:59:24,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511235638] [2021-11-19 13:59:24,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511235638] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:24,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:59:24,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:59:24,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981628924] [2021-11-19 13:59:24,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:24,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:59:24,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:59:24,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:59:24,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:59:24,734 INFO L87 Difference]: Start difference. First operand 166 states and 199 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:24,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:24,858 INFO L93 Difference]: Finished difference Result 242 states and 301 transitions. [2021-11-19 13:59:24,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:59:24,859 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2021-11-19 13:59:24,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:24,861 INFO L225 Difference]: With dead ends: 242 [2021-11-19 13:59:24,861 INFO L226 Difference]: Without dead ends: 207 [2021-11-19 13:59:24,861 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 [2021-11-19 13:59:24,862 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 53 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:24,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 236 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:59:24,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-11-19 13:59:24,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 197. [2021-11-19 13:59:24,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.2244897959183674) internal successors, (240), 196 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:24,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 240 transitions. [2021-11-19 13:59:24,965 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 240 transitions. Word has length 82 [2021-11-19 13:59:24,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:24,966 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 240 transitions. [2021-11-19 13:59:24,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:24,966 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 240 transitions. [2021-11-19 13:59:24,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-19 13:59:24,967 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:24,967 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:59:24,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-19 13:59:24,968 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-19 13:59:24,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:24,968 INFO L85 PathProgramCache]: Analyzing trace with hash -181466713, now seen corresponding path program 1 times [2021-11-19 13:59:24,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:59:24,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941117894] [2021-11-19 13:59:24,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:24,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:59:24,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:25,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:59:25,036 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:59:25,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941117894] [2021-11-19 13:59:25,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941117894] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:25,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:59:25,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:59:25,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945785123] [2021-11-19 13:59:25,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:25,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:59:25,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:59:25,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:59:25,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:59:25,039 INFO L87 Difference]: Start difference. First operand 197 states and 240 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:25,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:25,219 INFO L93 Difference]: Finished difference Result 391 states and 502 transitions. [2021-11-19 13:59:25,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:59:25,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 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 85 [2021-11-19 13:59:25,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:25,221 INFO L225 Difference]: With dead ends: 391 [2021-11-19 13:59:25,221 INFO L226 Difference]: Without dead ends: 294 [2021-11-19 13:59:25,222 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 [2021-11-19 13:59:25,223 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 46 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:25,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 236 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:59:25,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-11-19 13:59:25,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 280. [2021-11-19 13:59:25,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 1.2616487455197132) internal successors, (352), 279 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:25,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 352 transitions. [2021-11-19 13:59:25,406 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 352 transitions. Word has length 85 [2021-11-19 13:59:25,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:25,406 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 352 transitions. [2021-11-19 13:59:25,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:25,407 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 352 transitions. [2021-11-19 13:59:25,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-19 13:59:25,408 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:25,408 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:59:25,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-19 13:59:25,408 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-19 13:59:25,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:25,409 INFO L85 PathProgramCache]: Analyzing trace with hash -142636224, now seen corresponding path program 1 times [2021-11-19 13:59:25,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:59:25,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794758981] [2021-11-19 13:59:25,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:25,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:59:25,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:25,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:59:25,458 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:59:25,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794758981] [2021-11-19 13:59:25,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794758981] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:25,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:59:25,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:59:25,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858257249] [2021-11-19 13:59:25,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:25,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:59:25,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:59:25,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:59:25,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:59:25,461 INFO L87 Difference]: Start difference. First operand 280 states and 352 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:25,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:25,776 INFO L93 Difference]: Finished difference Result 640 states and 838 transitions. [2021-11-19 13:59:25,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:59:25,776 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 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 88 [2021-11-19 13:59:25,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:25,778 INFO L225 Difference]: With dead ends: 640 [2021-11-19 13:59:25,778 INFO L226 Difference]: Without dead ends: 460 [2021-11-19 13:59:25,779 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 [2021-11-19 13:59:25,779 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 39 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:25,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 236 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:59:25,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-19 13:59:26,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 434. [2021-11-19 13:59:26,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 1.2886836027713626) internal successors, (558), 433 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:26,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 558 transitions. [2021-11-19 13:59:26,040 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 558 transitions. Word has length 88 [2021-11-19 13:59:26,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:26,041 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 558 transitions. [2021-11-19 13:59:26,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:26,041 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 558 transitions. [2021-11-19 13:59:26,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-19 13:59:26,042 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:26,042 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:59:26,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-19 13:59:26,043 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-19 13:59:26,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:26,043 INFO L85 PathProgramCache]: Analyzing trace with hash 449708366, now seen corresponding path program 1 times [2021-11-19 13:59:26,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:59:26,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490093069] [2021-11-19 13:59:26,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:26,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:59:26,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:26,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:59:26,090 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:59:26,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490093069] [2021-11-19 13:59:26,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490093069] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:26,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:59:26,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:59:26,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473950839] [2021-11-19 13:59:26,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:26,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:59:26,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:59:26,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:59:26,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:59:26,093 INFO L87 Difference]: Start difference. First operand 434 states and 558 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:26,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:26,520 INFO L93 Difference]: Finished difference Result 1102 states and 1456 transitions. [2021-11-19 13:59:26,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:59:26,520 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 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 91 [2021-11-19 13:59:26,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:26,524 INFO L225 Difference]: With dead ends: 1102 [2021-11-19 13:59:26,524 INFO L226 Difference]: Without dead ends: 768 [2021-11-19 13:59:26,524 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 [2021-11-19 13:59:26,525 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 29 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:26,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 236 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:59:26,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2021-11-19 13:59:26,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 718. [2021-11-19 13:59:26,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 717 states have (on average 1.302649930264993) internal successors, (934), 717 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:26,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 934 transitions. [2021-11-19 13:59:26,960 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 934 transitions. Word has length 91 [2021-11-19 13:59:26,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:26,960 INFO L470 AbstractCegarLoop]: Abstraction has 718 states and 934 transitions. [2021-11-19 13:59:26,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:26,961 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 934 transitions. [2021-11-19 13:59:26,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-19 13:59:26,962 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:26,962 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:59:26,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-19 13:59:26,962 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-19 13:59:26,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:26,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1410131112, now seen corresponding path program 1 times [2021-11-19 13:59:26,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:59:26,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524427641] [2021-11-19 13:59:26,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:26,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:59:26,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:27,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:59:27,028 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:59:27,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524427641] [2021-11-19 13:59:27,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524427641] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:27,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:59:27,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 13:59:27,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537597325] [2021-11-19 13:59:27,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:27,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:59:27,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:59:27,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:59:27,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:59:27,031 INFO L87 Difference]: Start difference. First operand 718 states and 934 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:28,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:28,418 INFO L93 Difference]: Finished difference Result 2719 states and 3599 transitions. [2021-11-19 13:59:28,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 13:59:28,418 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 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 94 [2021-11-19 13:59:28,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:28,429 INFO L225 Difference]: With dead ends: 2719 [2021-11-19 13:59:28,429 INFO L226 Difference]: Without dead ends: 2101 [2021-11-19 13:59:28,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:59:28,431 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 512 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:28,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 746 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:59:28,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2101 states. [2021-11-19 13:59:29,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2101 to 1048. [2021-11-19 13:59:29,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 1047 states have (on average 1.2989493791786055) internal successors, (1360), 1047 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:29,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 1360 transitions. [2021-11-19 13:59:29,073 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 1360 transitions. Word has length 94 [2021-11-19 13:59:29,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:29,074 INFO L470 AbstractCegarLoop]: Abstraction has 1048 states and 1360 transitions. [2021-11-19 13:59:29,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:29,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 1360 transitions. [2021-11-19 13:59:29,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-19 13:59:29,076 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:29,076 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:59:29,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-19 13:59:29,076 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-19 13:59:29,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:29,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1639937050, now seen corresponding path program 1 times [2021-11-19 13:59:29,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:59:29,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067900781] [2021-11-19 13:59:29,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:29,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:59:29,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:29,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:59:29,233 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:59:29,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067900781] [2021-11-19 13:59:29,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067900781] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:29,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:59:29,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 13:59:29,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751797011] [2021-11-19 13:59:29,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:29,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:59:29,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:59:29,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:59:29,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:59:29,235 INFO L87 Difference]: Start difference. First operand 1048 states and 1360 transitions. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:30,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:30,056 INFO L93 Difference]: Finished difference Result 1998 states and 2612 transitions. [2021-11-19 13:59:30,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:59:30,057 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2021-11-19 13:59:30,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:30,061 INFO L225 Difference]: With dead ends: 1998 [2021-11-19 13:59:30,061 INFO L226 Difference]: Without dead ends: 1050 [2021-11-19 13:59:30,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:59:30,063 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 324 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:30,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 245 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:59:30,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-11-19 13:59:30,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 1048. [2021-11-19 13:59:30,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 1047 states have (on average 1.2970391595033428) internal successors, (1358), 1047 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:30,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 1358 transitions. [2021-11-19 13:59:30,650 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 1358 transitions. Word has length 96 [2021-11-19 13:59:30,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:30,650 INFO L470 AbstractCegarLoop]: Abstraction has 1048 states and 1358 transitions. [2021-11-19 13:59:30,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:30,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 1358 transitions. [2021-11-19 13:59:30,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-19 13:59:30,651 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:30,651 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:59:30,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-19 13:59:30,652 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-19 13:59:30,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:30,652 INFO L85 PathProgramCache]: Analyzing trace with hash 2055521500, now seen corresponding path program 1 times [2021-11-19 13:59:30,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:59:30,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852501122] [2021-11-19 13:59:30,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:30,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:59:30,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:30,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:59:30,701 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:59:30,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852501122] [2021-11-19 13:59:30,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852501122] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:30,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:59:30,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:59:30,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031147194] [2021-11-19 13:59:30,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:30,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:59:30,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:59:30,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:59:30,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:59:30,703 INFO L87 Difference]: Start difference. First operand 1048 states and 1358 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:31,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:31,528 INFO L93 Difference]: Finished difference Result 2230 states and 2920 transitions. [2021-11-19 13:59:31,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:59:31,529 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2021-11-19 13:59:31,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:31,534 INFO L225 Difference]: With dead ends: 2230 [2021-11-19 13:59:31,534 INFO L226 Difference]: Without dead ends: 1282 [2021-11-19 13:59:31,536 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 [2021-11-19 13:59:31,536 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 64 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:31,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 182 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:59:31,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2021-11-19 13:59:32,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 1280. [2021-11-19 13:59:32,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1279 states have (on average 1.2916340891321345) internal successors, (1652), 1279 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:32,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 1652 transitions. [2021-11-19 13:59:32,331 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 1652 transitions. Word has length 96 [2021-11-19 13:59:32,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:32,331 INFO L470 AbstractCegarLoop]: Abstraction has 1280 states and 1652 transitions. [2021-11-19 13:59:32,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:32,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 1652 transitions. [2021-11-19 13:59:32,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-19 13:59:32,332 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:32,333 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:59:32,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-19 13:59:32,333 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-19 13:59:32,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:32,334 INFO L85 PathProgramCache]: Analyzing trace with hash 394598223, now seen corresponding path program 1 times [2021-11-19 13:59:32,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:59:32,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229697115] [2021-11-19 13:59:32,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:32,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:59:32,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:32,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:59:32,416 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:59:32,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229697115] [2021-11-19 13:59:32,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229697115] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:32,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:59:32,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 13:59:32,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797227499] [2021-11-19 13:59:32,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:32,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:59:32,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:59:32,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:59:32,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:59:32,418 INFO L87 Difference]: Start difference. First operand 1280 states and 1652 transitions. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:33,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:33,700 INFO L93 Difference]: Finished difference Result 1770 states and 2245 transitions. [2021-11-19 13:59:33,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 13:59:33,701 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 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 97 [2021-11-19 13:59:33,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:33,708 INFO L225 Difference]: With dead ends: 1770 [2021-11-19 13:59:33,708 INFO L226 Difference]: Without dead ends: 1768 [2021-11-19 13:59:33,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:59:33,709 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 263 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:33,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 757 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:59:33,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1768 states. [2021-11-19 13:59:34,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1768 to 1280. [2021-11-19 13:59:34,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1279 states have (on average 1.272869429241595) internal successors, (1628), 1279 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:34,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 1628 transitions. [2021-11-19 13:59:34,537 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 1628 transitions. Word has length 97 [2021-11-19 13:59:34,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:34,538 INFO L470 AbstractCegarLoop]: Abstraction has 1280 states and 1628 transitions. [2021-11-19 13:59:34,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:34,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 1628 transitions. [2021-11-19 13:59:34,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-19 13:59:34,539 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:34,540 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:59:34,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-19 13:59:34,540 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-19 13:59:34,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:34,541 INFO L85 PathProgramCache]: Analyzing trace with hash -2092320179, now seen corresponding path program 1 times [2021-11-19 13:59:34,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:59:34,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712283613] [2021-11-19 13:59:34,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:34,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:59:34,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:34,974 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 13:59:34,975 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:59:34,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712283613] [2021-11-19 13:59:34,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712283613] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:34,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:59:34,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 13:59:34,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735265817] [2021-11-19 13:59:34,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:34,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 13:59:34,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:59:34,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 13:59:34,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-11-19 13:59:34,976 INFO L87 Difference]: Start difference. First operand 1280 states and 1628 transitions. Second operand has 20 states, 20 states have (on average 5.15) internal successors, (103), 19 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:38,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:38,536 INFO L93 Difference]: Finished difference Result 3754 states and 4791 transitions. [2021-11-19 13:59:38,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-19 13:59:38,537 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.15) internal successors, (103), 19 states have internal predecessors, (103), 0 states have call successors, (0), 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 111 [2021-11-19 13:59:38,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:38,549 INFO L225 Difference]: With dead ends: 3754 [2021-11-19 13:59:38,550 INFO L226 Difference]: Without dead ends: 2566 [2021-11-19 13:59:38,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=415, Invalid=1841, Unknown=0, NotChecked=0, Total=2256 [2021-11-19 13:59:38,552 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 584 mSDsluCounter, 1134 mSDsCounter, 0 mSdLazyCounter, 1823 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 1892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:38,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [584 Valid, 1215 Invalid, 1892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1823 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 13:59:38,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2566 states. [2021-11-19 13:59:39,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2566 to 1289. [2021-11-19 13:59:39,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1289 states, 1288 states have (on average 1.2717391304347827) internal successors, (1638), 1288 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:39,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 1638 transitions. [2021-11-19 13:59:39,438 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 1638 transitions. Word has length 111 [2021-11-19 13:59:39,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:39,438 INFO L470 AbstractCegarLoop]: Abstraction has 1289 states and 1638 transitions. [2021-11-19 13:59:39,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.15) internal successors, (103), 19 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:39,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 1638 transitions. [2021-11-19 13:59:39,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-19 13:59:39,440 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:39,441 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:59:39,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-19 13:59:39,441 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-19 13:59:39,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:39,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1753070343, now seen corresponding path program 1 times [2021-11-19 13:59:39,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:59:39,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999319909] [2021-11-19 13:59:39,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:39,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:59:39,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:39,497 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 13:59:39,498 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:59:39,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999319909] [2021-11-19 13:59:39,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999319909] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:39,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:59:39,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 13:59:39,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745904813] [2021-11-19 13:59:39,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:39,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:59:39,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:59:39,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:59:39,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:59:39,501 INFO L87 Difference]: Start difference. First operand 1289 states and 1638 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:40,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:40,393 INFO L93 Difference]: Finished difference Result 2120 states and 2714 transitions. [2021-11-19 13:59:40,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:59:40,394 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 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 112 [2021-11-19 13:59:40,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:40,399 INFO L225 Difference]: With dead ends: 2120 [2021-11-19 13:59:40,399 INFO L226 Difference]: Without dead ends: 1289 [2021-11-19 13:59:40,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:59:40,401 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 146 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:40,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 133 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:59:40,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2021-11-19 13:59:41,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 918. [2021-11-19 13:59:41,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 918 states, 917 states have (on average 1.2497273718647763) internal successors, (1146), 917 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:41,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 1146 transitions. [2021-11-19 13:59:41,039 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 1146 transitions. Word has length 112 [2021-11-19 13:59:41,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:41,040 INFO L470 AbstractCegarLoop]: Abstraction has 918 states and 1146 transitions. [2021-11-19 13:59:41,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:41,040 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 1146 transitions. [2021-11-19 13:59:41,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-19 13:59:41,042 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:41,042 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:59:41,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-19 13:59:41,042 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-19 13:59:41,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:41,043 INFO L85 PathProgramCache]: Analyzing trace with hash -93848930, now seen corresponding path program 1 times [2021-11-19 13:59:41,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:59:41,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082386338] [2021-11-19 13:59:41,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:41,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:59:41,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:41,520 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 13:59:41,520 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:59:41,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082386338] [2021-11-19 13:59:41,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082386338] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:41,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:59:41,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-19 13:59:41,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999802568] [2021-11-19 13:59:41,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:41,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 13:59:41,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:59:41,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 13:59:41,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-11-19 13:59:41,523 INFO L87 Difference]: Start difference. First operand 918 states and 1146 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 17 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:44,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:44,758 INFO L93 Difference]: Finished difference Result 2722 states and 3408 transitions. [2021-11-19 13:59:44,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-19 13:59:44,759 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 17 states have internal predecessors, (104), 0 states have call successors, (0), 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 112 [2021-11-19 13:59:44,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:44,766 INFO L225 Difference]: With dead ends: 2722 [2021-11-19 13:59:44,766 INFO L226 Difference]: Without dead ends: 1885 [2021-11-19 13:59:44,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=489, Invalid=1961, Unknown=0, NotChecked=0, Total=2450 [2021-11-19 13:59:44,769 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 667 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 1261 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 1348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:44,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [667 Valid, 1012 Invalid, 1348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1261 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 13:59:44,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1885 states. [2021-11-19 13:59:45,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1885 to 913. [2021-11-19 13:59:45,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 912 states have (on average 1.25) internal successors, (1140), 912 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:45,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1140 transitions. [2021-11-19 13:59:45,532 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1140 transitions. Word has length 112 [2021-11-19 13:59:45,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:45,533 INFO L470 AbstractCegarLoop]: Abstraction has 913 states and 1140 transitions. [2021-11-19 13:59:45,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 17 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:45,533 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1140 transitions. [2021-11-19 13:59:45,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-19 13:59:45,534 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:45,534 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:59:45,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-11-19 13:59:45,534 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-19 13:59:45,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:45,535 INFO L85 PathProgramCache]: Analyzing trace with hash 68040231, now seen corresponding path program 1 times [2021-11-19 13:59:45,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:59:45,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152426277] [2021-11-19 13:59:45,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:45,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:59:45,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:45,638 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 13:59:45,638 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:59:45,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152426277] [2021-11-19 13:59:45,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152426277] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:45,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:59:45,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 13:59:45,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951265182] [2021-11-19 13:59:45,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:45,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:59:45,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:59:45,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:59:45,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:59:45,641 INFO L87 Difference]: Start difference. First operand 913 states and 1140 transitions. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:47,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:47,039 INFO L93 Difference]: Finished difference Result 2256 states and 2833 transitions. [2021-11-19 13:59:47,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 13:59:47,040 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 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 112 [2021-11-19 13:59:47,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:47,047 INFO L225 Difference]: With dead ends: 2256 [2021-11-19 13:59:47,047 INFO L226 Difference]: Without dead ends: 1419 [2021-11-19 13:59:47,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:59:47,050 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 410 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:47,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 325 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:59:47,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2021-11-19 13:59:47,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 904. [2021-11-19 13:59:47,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 1.2502768549280177) internal successors, (1129), 903 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:47,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1129 transitions. [2021-11-19 13:59:47,763 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1129 transitions. Word has length 112 [2021-11-19 13:59:47,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:47,763 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 1129 transitions. [2021-11-19 13:59:47,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:47,763 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1129 transitions. [2021-11-19 13:59:47,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-19 13:59:47,764 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:47,764 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:59:47,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-19 13:59:47,764 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-19 13:59:47,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:47,765 INFO L85 PathProgramCache]: Analyzing trace with hash 140746375, now seen corresponding path program 1 times [2021-11-19 13:59:47,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:59:47,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192587579] [2021-11-19 13:59:47,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:47,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:59:47,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:48,218 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 13:59:48,218 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:59:48,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192587579] [2021-11-19 13:59:48,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192587579] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:48,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:59:48,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 13:59:48,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374186975] [2021-11-19 13:59:48,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:48,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 13:59:48,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:59:48,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 13:59:48,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-11-19 13:59:48,220 INFO L87 Difference]: Start difference. First operand 904 states and 1129 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:50,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:50,258 INFO L93 Difference]: Finished difference Result 2604 states and 3274 transitions. [2021-11-19 13:59:50,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-19 13:59:50,259 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 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 113 [2021-11-19 13:59:50,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:50,264 INFO L225 Difference]: With dead ends: 2604 [2021-11-19 13:59:50,264 INFO L226 Difference]: Without dead ends: 1766 [2021-11-19 13:59:50,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=230, Invalid=1176, Unknown=0, NotChecked=0, Total=1406 [2021-11-19 13:59:50,266 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 417 mSDsluCounter, 1604 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 1688 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:50,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 1688 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 13:59:50,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1766 states. [2021-11-19 13:59:50,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1766 to 919. [2021-11-19 13:59:50,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 1.2483660130718954) internal successors, (1146), 918 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:50,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1146 transitions. [2021-11-19 13:59:50,935 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1146 transitions. Word has length 113 [2021-11-19 13:59:50,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:50,936 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1146 transitions. [2021-11-19 13:59:50,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:59:50,936 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1146 transitions. [2021-11-19 13:59:50,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-19 13:59:50,936 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:50,937 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:59:50,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-11-19 13:59:50,937 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-19 13:59:50,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:50,937 INFO L85 PathProgramCache]: Analyzing trace with hash 821235352, now seen corresponding path program 1 times [2021-11-19 13:59:50,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:59:50,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639105832] [2021-11-19 13:59:50,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:50,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:59:50,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:54,802 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:59:54,802 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:59:54,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639105832] [2021-11-19 13:59:54,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639105832] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 13:59:54,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711399557] [2021-11-19 13:59:54,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:54,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:59:54,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30403c3c-cc8c-4e2b-aed2-5d58e52d3ba5/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:59:54,819 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30403c3c-cc8c-4e2b-aed2-5d58e52d3ba5/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:59:54,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30403c3c-cc8c-4e2b-aed2-5d58e52d3ba5/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 13:59:55,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:55,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 104 conjunts are in the unsatisfiable core [2021-11-19 13:59:55,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:26,709 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:00:26,709 INFO L328 TraceCheckSpWp]: Computing backward predicates...