./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ea17b6f261bb6e2069b46537416ceb2b28c77bf12fbc31c6c070453fa873ea8f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 00:54:39,596 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 00:54:39,599 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 00:54:39,654 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 00:54:39,655 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 00:54:39,659 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 00:54:39,660 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 00:54:39,664 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 00:54:39,667 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 00:54:39,673 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 00:54:39,674 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 00:54:39,675 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 00:54:39,676 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 00:54:39,678 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 00:54:39,680 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 00:54:39,684 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 00:54:39,686 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 00:54:39,687 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 00:54:39,689 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 00:54:39,697 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 00:54:39,698 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 00:54:39,700 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 00:54:39,703 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 00:54:39,704 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 00:54:39,713 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 00:54:39,713 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 00:54:39,713 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 00:54:39,715 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 00:54:39,716 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 00:54:39,718 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 00:54:39,718 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 00:54:39,719 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 00:54:39,721 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 00:54:39,722 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 00:54:39,723 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 00:54:39,723 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 00:54:39,724 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 00:54:39,724 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 00:54:39,725 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 00:54:39,725 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 00:54:39,726 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 00:54:39,730 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 00:54:39,771 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 00:54:39,771 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 00:54:39,773 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 00:54:39,773 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 00:54:39,774 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 00:54:39,774 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 00:54:39,774 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 00:54:39,774 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 00:54:39,781 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 00:54:39,781 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 00:54:39,782 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 00:54:39,782 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 00:54:39,782 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 00:54:39,782 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 00:54:39,783 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 00:54:39,783 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 00:54:39,784 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 00:54:39,784 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 00:54:39,784 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 00:54:39,784 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 00:54:39,784 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 00:54:39,784 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 00:54:39,785 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 00:54:39,785 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 00:54:39,785 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 00:54:39,785 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 00:54:39,785 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 00:54:39,786 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 00:54:39,786 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 00:54:39,787 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 00:54:39,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:54:39,788 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 00:54:39,788 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 00:54:39,788 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 00:54:39,789 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 00:54:39,789 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 00:54:39,789 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 00:54:39,789 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 00:54:39,789 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 00:54:39,790 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_b3d145a7-5207-4a97-95d6-38108b548390/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ea17b6f261bb6e2069b46537416ceb2b28c77bf12fbc31c6c070453fa873ea8f [2021-11-07 00:54:40,124 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:54:40,145 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:54:40,147 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:54:40,148 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:54:40,149 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:54:40,150 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c [2021-11-07 00:54:40,213 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/bin/utaipan-UUZaoUuFF8/data/b702892a8/7bcd01640fce484291f340ab6c69e8e4/FLAG66cd01dd6 [2021-11-07 00:54:41,042 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:54:41,043 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c [2021-11-07 00:54:41,090 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/bin/utaipan-UUZaoUuFF8/data/b702892a8/7bcd01640fce484291f340ab6c69e8e4/FLAG66cd01dd6 [2021-11-07 00:54:41,517 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/bin/utaipan-UUZaoUuFF8/data/b702892a8/7bcd01640fce484291f340ab6c69e8e4 [2021-11-07 00:54:41,520 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:54:41,521 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:54:41,523 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:54:41,523 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:54:41,526 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:54:41,527 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:54:41" (1/1) ... [2021-11-07 00:54:41,528 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56ad00bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:54:41, skipping insertion in model container [2021-11-07 00:54:41,528 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:54:41" (1/1) ... [2021-11-07 00:54:41,535 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:54:41,754 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:54:42,730 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c[80354,80367] [2021-11-07 00:54:42,862 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c[115904,115917] [2021-11-07 00:54:42,929 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c[133708,133721] [2021-11-07 00:54:42,962 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c[142627,142640] [2021-11-07 00:54:42,980 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c[147060,147073] [2021-11-07 00:54:43,006 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c[151393,151406] [2021-11-07 00:54:43,149 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c[186229,186242] [2021-11-07 00:54:43,228 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c[203860,203873] [2021-11-07 00:54:43,264 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c[212816,212829] [2021-11-07 00:54:43,279 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c[217286,217299] [2021-11-07 00:54:43,295 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c[221656,221669] [2021-11-07 00:54:43,358 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c[240553,240566] [2021-11-07 00:54:43,387 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c[249509,249522] [2021-11-07 00:54:43,404 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c[253979,253992] [2021-11-07 00:54:43,419 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c[258349,258362] [2021-11-07 00:54:43,436 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c[263314,263327] [2021-11-07 00:54:43,450 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c[267693,267706] [2021-11-07 00:54:43,466 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c[272163,272176] [2021-11-07 00:54:43,481 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c[276533,276546] [2021-11-07 00:54:43,497 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c[281119,281132] [2021-11-07 00:54:43,513 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c[285656,285669] [2021-11-07 00:54:43,530 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c[290122,290135] [2021-11-07 00:54:43,581 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:54:43,606 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 00:54:43,901 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c[80354,80367] [2021-11-07 00:54:44,019 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c[115904,115917] [2021-11-07 00:54:44,071 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c[133708,133721] [2021-11-07 00:54:44,099 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c[142627,142640] [2021-11-07 00:54:44,113 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c[147060,147073] [2021-11-07 00:54:44,127 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c[151393,151406] [2021-11-07 00:54:44,224 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c[186229,186242] [2021-11-07 00:54:44,275 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c[203860,203873] [2021-11-07 00:54:44,301 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c[212816,212829] [2021-11-07 00:54:44,315 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c[217286,217299] [2021-11-07 00:54:44,328 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c[221656,221669] [2021-11-07 00:54:44,383 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c[240553,240566] [2021-11-07 00:54:44,409 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c[249509,249522] [2021-11-07 00:54:44,423 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c[253979,253992] [2021-11-07 00:54:44,437 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c[258349,258362] [2021-11-07 00:54:44,453 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c[263314,263327] [2021-11-07 00:54:44,467 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c[267693,267706] [2021-11-07 00:54:44,481 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c[272163,272176] [2021-11-07 00:54:44,495 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c[276533,276546] [2021-11-07 00:54:44,510 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c[281119,281132] [2021-11-07 00:54:44,566 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c[285656,285669] [2021-11-07 00:54:44,580 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c[290122,290135] [2021-11-07 00:54:44,617 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:54:44,647 INFO L208 MainTranslator]: Completed translation [2021-11-07 00:54:44,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:54:44 WrapperNode [2021-11-07 00:54:44,648 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:54:44,649 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 00:54:44,649 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 00:54:44,649 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 00:54:44,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:54:44" (1/1) ... [2021-11-07 00:54:44,728 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:54:44" (1/1) ... [2021-11-07 00:54:44,922 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 00:54:44,923 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 00:54:44,923 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 00:54:44,923 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 00:54:44,932 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:54:44" (1/1) ... [2021-11-07 00:54:44,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:54:44" (1/1) ... [2021-11-07 00:54:44,978 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:54:44" (1/1) ... [2021-11-07 00:54:44,979 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:54:44" (1/1) ... [2021-11-07 00:54:45,088 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:54:44" (1/1) ... [2021-11-07 00:54:45,211 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:54:44" (1/1) ... [2021-11-07 00:54:45,233 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:54:44" (1/1) ... [2021-11-07 00:54:45,263 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 00:54:45,264 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 00:54:45,264 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 00:54:45,264 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 00:54:45,265 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:54:44" (1/1) ... [2021-11-07 00:54:45,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:54:45,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:54:45,295 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 00:54:45,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 00:54:45,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 00:54:45,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 00:54:45,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 00:54:45,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 00:54:51,822 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 00:54:51,822 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 00:54:51,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:54:51 BoogieIcfgContainer [2021-11-07 00:54:51,830 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 00:54:51,833 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 00:54:51,833 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 00:54:51,838 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 00:54:51,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:54:41" (1/3) ... [2021-11-07 00:54:51,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23d887f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:54:51, skipping insertion in model container [2021-11-07 00:54:51,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:54:44" (2/3) ... [2021-11-07 00:54:51,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23d887f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:54:51, skipping insertion in model container [2021-11-07 00:54:51,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:54:51" (3/3) ... [2021-11-07 00:54:51,842 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c [2021-11-07 00:54:51,848 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 00:54:51,848 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2021-11-07 00:54:51,923 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 00:54:51,931 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 00:54:51,931 INFO L340 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2021-11-07 00:54:51,993 INFO L276 IsEmpty]: Start isEmpty. Operand has 2505 states, 2482 states have (on average 1.7594681708299758) internal successors, (4367), 2504 states have internal predecessors, (4367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:54:52,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 00:54:52,026 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:54:52,027 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:54:52,028 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:54:52,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:54:52,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1286229050, now seen corresponding path program 1 times [2021-11-07 00:54:52,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:54:52,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996948483] [2021-11-07 00:54:52,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:54:52,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:54:52,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:54:52,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:54:52,671 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:54:52,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996948483] [2021-11-07 00:54:52,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996948483] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:54:52,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:54:52,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 00:54:52,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465673884] [2021-11-07 00:54:52,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 00:54:52,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:54:52,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 00:54:52,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:54:52,709 INFO L87 Difference]: Start difference. First operand has 2505 states, 2482 states have (on average 1.7594681708299758) internal successors, (4367), 2504 states have internal predecessors, (4367), 0 states have call successors, (0), 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 17.2) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:54:54,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:54:54,586 INFO L93 Difference]: Finished difference Result 2966 states and 5095 transitions. [2021-11-07 00:54:54,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:54:54,589 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-07 00:54:54,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:54:54,612 INFO L225 Difference]: With dead ends: 2966 [2021-11-07 00:54:54,613 INFO L226 Difference]: Without dead ends: 1731 [2021-11-07 00:54:54,620 INFO L786 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 [2021-11-07 00:54:54,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2021-11-07 00:54:54,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 1731. [2021-11-07 00:54:54,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1731 states, 1709 states have (on average 1.2855471035693389) internal successors, (2197), 1730 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:54:54,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 2197 transitions. [2021-11-07 00:54:54,786 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 2197 transitions. Word has length 86 [2021-11-07 00:54:54,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:54:54,786 INFO L470 AbstractCegarLoop]: Abstraction has 1731 states and 2197 transitions. [2021-11-07 00:54:54,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:54:54,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 2197 transitions. [2021-11-07 00:54:54,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 00:54:54,794 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:54:54,794 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:54:54,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 00:54:54,795 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:54:54,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:54:54,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1719768578, now seen corresponding path program 1 times [2021-11-07 00:54:54,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:54:54,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755225747] [2021-11-07 00:54:54,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:54:54,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:54:54,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:54:54,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:54:54,985 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:54:54,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755225747] [2021-11-07 00:54:54,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755225747] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:54:54,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:54:54,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 00:54:54,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572599150] [2021-11-07 00:54:54,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 00:54:54,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:54:54,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 00:54:55,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:54:55,002 INFO L87 Difference]: Start difference. First operand 1731 states and 2197 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:54:56,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:54:56,858 INFO L93 Difference]: Finished difference Result 3035 states and 3884 transitions. [2021-11-07 00:54:56,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:54:56,859 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-07 00:54:56,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:54:56,873 INFO L225 Difference]: With dead ends: 3035 [2021-11-07 00:54:56,873 INFO L226 Difference]: Without dead ends: 2167 [2021-11-07 00:54:56,876 INFO L786 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 [2021-11-07 00:54:56,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2167 states. [2021-11-07 00:54:56,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2167 to 2010. [2021-11-07 00:54:57,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2010 states, 1988 states have (on average 1.330482897384306) internal successors, (2645), 2009 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:54:57,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 2645 transitions. [2021-11-07 00:54:57,011 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 2645 transitions. Word has length 86 [2021-11-07 00:54:57,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:54:57,013 INFO L470 AbstractCegarLoop]: Abstraction has 2010 states and 2645 transitions. [2021-11-07 00:54:57,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:54:57,013 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 2645 transitions. [2021-11-07 00:54:57,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 00:54:57,019 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:54:57,020 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:54:57,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 00:54:57,020 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:54:57,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:54:57,031 INFO L85 PathProgramCache]: Analyzing trace with hash 2017741702, now seen corresponding path program 1 times [2021-11-07 00:54:57,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:54:57,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23461050] [2021-11-07 00:54:57,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:54:57,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:54:57,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:54:57,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:54:57,216 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:54:57,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23461050] [2021-11-07 00:54:57,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23461050] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:54:57,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:54:57,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 00:54:57,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929599346] [2021-11-07 00:54:57,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 00:54:57,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:54:57,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 00:54:57,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:54:57,221 INFO L87 Difference]: Start difference. First operand 2010 states and 2645 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:54:58,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:54:58,569 INFO L93 Difference]: Finished difference Result 2729 states and 3587 transitions. [2021-11-07 00:54:58,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:54:58,570 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-07 00:54:58,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:54:58,580 INFO L225 Difference]: With dead ends: 2729 [2021-11-07 00:54:58,581 INFO L226 Difference]: Without dead ends: 1946 [2021-11-07 00:54:58,582 INFO L786 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 [2021-11-07 00:54:58,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1946 states. [2021-11-07 00:54:58,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1946 to 1946. [2021-11-07 00:54:58,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1946 states, 1924 states have (on average 1.3362785862785862) internal successors, (2571), 1945 states have internal predecessors, (2571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:54:58,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1946 states to 1946 states and 2571 transitions. [2021-11-07 00:54:58,686 INFO L78 Accepts]: Start accepts. Automaton has 1946 states and 2571 transitions. Word has length 86 [2021-11-07 00:54:58,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:54:58,687 INFO L470 AbstractCegarLoop]: Abstraction has 1946 states and 2571 transitions. [2021-11-07 00:54:58,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:54:58,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1946 states and 2571 transitions. [2021-11-07 00:54:58,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 00:54:58,693 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:54:58,693 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:54:58,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 00:54:58,693 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:54:58,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:54:58,694 INFO L85 PathProgramCache]: Analyzing trace with hash 280861147, now seen corresponding path program 1 times [2021-11-07 00:54:58,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:54:58,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040265365] [2021-11-07 00:54:58,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:54:58,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:54:58,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:54:58,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:54:58,801 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:54:58,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040265365] [2021-11-07 00:54:58,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040265365] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:54:58,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:54:58,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 00:54:58,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067488619] [2021-11-07 00:54:58,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 00:54:58,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:54:58,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 00:54:58,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:54:58,803 INFO L87 Difference]: Start difference. First operand 1946 states and 2571 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 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) [2021-11-07 00:54:59,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:54:59,814 INFO L93 Difference]: Finished difference Result 2701 states and 3565 transitions. [2021-11-07 00:54:59,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:54:59,815 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 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 [2021-11-07 00:54:59,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:54:59,824 INFO L225 Difference]: With dead ends: 2701 [2021-11-07 00:54:59,825 INFO L226 Difference]: Without dead ends: 1728 [2021-11-07 00:54:59,826 INFO L786 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 [2021-11-07 00:54:59,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1728 states. [2021-11-07 00:54:59,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1728 to 1728. [2021-11-07 00:54:59,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1728 states, 1706 states have (on average 1.3475967174677608) internal successors, (2299), 1727 states have internal predecessors, (2299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:54:59,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 2299 transitions. [2021-11-07 00:54:59,934 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 2299 transitions. Word has length 88 [2021-11-07 00:54:59,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:54:59,934 INFO L470 AbstractCegarLoop]: Abstraction has 1728 states and 2299 transitions. [2021-11-07 00:54:59,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 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) [2021-11-07 00:54:59,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 2299 transitions. [2021-11-07 00:54:59,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-07 00:54:59,939 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:54:59,939 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:54:59,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 00:54:59,940 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:54:59,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:54:59,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1951557911, now seen corresponding path program 1 times [2021-11-07 00:54:59,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:54:59,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963962030] [2021-11-07 00:54:59,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:54:59,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:54:59,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:00,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:00,041 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:00,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963962030] [2021-11-07 00:55:00,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963962030] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:00,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:00,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 00:55:00,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249490656] [2021-11-07 00:55:00,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 00:55:00,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:00,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 00:55:00,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:55:00,044 INFO L87 Difference]: Start difference. First operand 1728 states and 2299 transitions. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:00,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:00,868 INFO L93 Difference]: Finished difference Result 2155 states and 2825 transitions. [2021-11-07 00:55:00,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:55:00,868 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-11-07 00:55:00,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:00,877 INFO L225 Difference]: With dead ends: 2155 [2021-11-07 00:55:00,877 INFO L226 Difference]: Without dead ends: 1328 [2021-11-07 00:55:00,881 INFO L786 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 [2021-11-07 00:55:00,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1328 states. [2021-11-07 00:55:00,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1328 to 1328. [2021-11-07 00:55:00,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 1306 states have (on average 1.3522205206738132) internal successors, (1766), 1327 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:00,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 1766 transitions. [2021-11-07 00:55:00,966 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 1766 transitions. Word has length 90 [2021-11-07 00:55:00,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:00,966 INFO L470 AbstractCegarLoop]: Abstraction has 1328 states and 1766 transitions. [2021-11-07 00:55:00,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:00,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 1766 transitions. [2021-11-07 00:55:00,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 00:55:00,970 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:00,970 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:00,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 00:55:00,971 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:55:00,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:00,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1685476223, now seen corresponding path program 1 times [2021-11-07 00:55:00,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:00,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381442890] [2021-11-07 00:55:00,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:00,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:01,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:01,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:01,152 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:01,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381442890] [2021-11-07 00:55:01,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381442890] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:01,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:01,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 00:55:01,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928343618] [2021-11-07 00:55:01,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 00:55:01,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:01,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 00:55:01,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:55:01,154 INFO L87 Difference]: Start difference. First operand 1328 states and 1766 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:01,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:01,696 INFO L93 Difference]: Finished difference Result 1565 states and 2031 transitions. [2021-11-07 00:55:01,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:55:01,697 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-07 00:55:01,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:01,703 INFO L225 Difference]: With dead ends: 1565 [2021-11-07 00:55:01,703 INFO L226 Difference]: Without dead ends: 934 [2021-11-07 00:55:01,705 INFO L786 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 [2021-11-07 00:55:01,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2021-11-07 00:55:01,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 934. [2021-11-07 00:55:01,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 912 states have (on average 1.3530701754385965) internal successors, (1234), 933 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:01,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1234 transitions. [2021-11-07 00:55:01,771 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1234 transitions. Word has length 92 [2021-11-07 00:55:01,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:01,772 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 1234 transitions. [2021-11-07 00:55:01,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:01,773 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1234 transitions. [2021-11-07 00:55:01,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 00:55:01,775 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:01,776 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:01,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 00:55:01,776 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:55:01,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:01,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1346771176, now seen corresponding path program 1 times [2021-11-07 00:55:01,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:01,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368127566] [2021-11-07 00:55:01,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:01,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:01,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:01,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:01,985 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:01,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368127566] [2021-11-07 00:55:01,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368127566] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:01,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:01,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 00:55:01,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783953595] [2021-11-07 00:55:01,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 00:55:01,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:01,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 00:55:01,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 00:55:01,988 INFO L87 Difference]: Start difference. First operand 934 states and 1234 transitions. Second operand has 7 states, 7 states have (on average 13.428571428571429) 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) [2021-11-07 00:55:03,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:03,062 INFO L93 Difference]: Finished difference Result 1646 states and 2088 transitions. [2021-11-07 00:55:03,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 00:55:03,063 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.428571428571429) 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 [2021-11-07 00:55:03,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:03,070 INFO L225 Difference]: With dead ends: 1646 [2021-11-07 00:55:03,070 INFO L226 Difference]: Without dead ends: 1244 [2021-11-07 00:55:03,072 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-11-07 00:55:03,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2021-11-07 00:55:03,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 934. [2021-11-07 00:55:03,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 912 states have (on average 1.3519736842105263) internal successors, (1233), 933 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:03,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1233 transitions. [2021-11-07 00:55:03,151 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1233 transitions. Word has length 94 [2021-11-07 00:55:03,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:03,152 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 1233 transitions. [2021-11-07 00:55:03,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) 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) [2021-11-07 00:55:03,152 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1233 transitions. [2021-11-07 00:55:03,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 00:55:03,155 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:03,155 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:03,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 00:55:03,156 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:55:03,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:03,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1574448360, now seen corresponding path program 1 times [2021-11-07 00:55:03,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:03,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755486416] [2021-11-07 00:55:03,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:03,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:03,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:03,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:03,309 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:03,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755486416] [2021-11-07 00:55:03,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755486416] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:03,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:03,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 00:55:03,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354961990] [2021-11-07 00:55:03,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:55:03,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:03,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:55:03,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:55:03,312 INFO L87 Difference]: Start difference. First operand 934 states and 1233 transitions. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 7 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) [2021-11-07 00:55:04,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:04,546 INFO L93 Difference]: Finished difference Result 1267 states and 1670 transitions. [2021-11-07 00:55:04,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 00:55:04,547 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 7 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 [2021-11-07 00:55:04,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:04,553 INFO L225 Difference]: With dead ends: 1267 [2021-11-07 00:55:04,553 INFO L226 Difference]: Without dead ends: 1040 [2021-11-07 00:55:04,554 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-11-07 00:55:04,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2021-11-07 00:55:04,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 934. [2021-11-07 00:55:04,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 912 states have (on average 1.3508771929824561) internal successors, (1232), 933 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:04,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1232 transitions. [2021-11-07 00:55:04,637 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1232 transitions. Word has length 94 [2021-11-07 00:55:04,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:04,638 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 1232 transitions. [2021-11-07 00:55:04,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 7 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) [2021-11-07 00:55:04,638 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1232 transitions. [2021-11-07 00:55:04,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 00:55:04,644 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:04,644 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:04,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 00:55:04,645 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:55:04,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:04,645 INFO L85 PathProgramCache]: Analyzing trace with hash -53559704, now seen corresponding path program 1 times [2021-11-07 00:55:04,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:04,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918858791] [2021-11-07 00:55:04,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:04,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:04,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:04,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:04,874 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:04,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918858791] [2021-11-07 00:55:04,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918858791] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:04,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:04,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 00:55:04,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717247741] [2021-11-07 00:55:04,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:55:04,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:04,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:55:04,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:55:04,877 INFO L87 Difference]: Start difference. First operand 934 states and 1232 transitions. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 7 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) [2021-11-07 00:55:06,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:06,580 INFO L93 Difference]: Finished difference Result 1807 states and 2386 transitions. [2021-11-07 00:55:06,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 00:55:06,580 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 7 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 [2021-11-07 00:55:06,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:06,589 INFO L225 Difference]: With dead ends: 1807 [2021-11-07 00:55:06,590 INFO L226 Difference]: Without dead ends: 1651 [2021-11-07 00:55:06,591 INFO L786 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 [2021-11-07 00:55:06,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1651 states. [2021-11-07 00:55:06,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1651 to 934. [2021-11-07 00:55:06,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 912 states have (on average 1.349780701754386) internal successors, (1231), 933 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:06,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1231 transitions. [2021-11-07 00:55:06,692 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1231 transitions. Word has length 94 [2021-11-07 00:55:06,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:06,692 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 1231 transitions. [2021-11-07 00:55:06,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 7 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) [2021-11-07 00:55:06,693 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1231 transitions. [2021-11-07 00:55:06,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-07 00:55:06,696 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:06,696 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:06,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 00:55:06,697 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:55:06,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:06,697 INFO L85 PathProgramCache]: Analyzing trace with hash 339408658, now seen corresponding path program 1 times [2021-11-07 00:55:06,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:06,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563427624] [2021-11-07 00:55:06,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:06,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:06,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:06,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:06,953 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:06,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563427624] [2021-11-07 00:55:06,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563427624] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:06,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:06,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 00:55:06,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990759878] [2021-11-07 00:55:06,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:55:06,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:06,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:55:06,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:55:06,956 INFO L87 Difference]: Start difference. First operand 934 states and 1231 transitions. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:08,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:08,732 INFO L93 Difference]: Finished difference Result 1748 states and 2299 transitions. [2021-11-07 00:55:08,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 00:55:08,733 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 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 95 [2021-11-07 00:55:08,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:08,743 INFO L225 Difference]: With dead ends: 1748 [2021-11-07 00:55:08,744 INFO L226 Difference]: Without dead ends: 1626 [2021-11-07 00:55:08,745 INFO L786 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 [2021-11-07 00:55:08,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1626 states. [2021-11-07 00:55:08,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1626 to 934. [2021-11-07 00:55:08,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 912 states have (on average 1.3486842105263157) internal successors, (1230), 933 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:08,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1230 transitions. [2021-11-07 00:55:08,849 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1230 transitions. Word has length 95 [2021-11-07 00:55:08,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:08,849 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 1230 transitions. [2021-11-07 00:55:08,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:08,850 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1230 transitions. [2021-11-07 00:55:08,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-07 00:55:08,852 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:08,853 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:08,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 00:55:08,853 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:55:08,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:08,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1831400991, now seen corresponding path program 1 times [2021-11-07 00:55:08,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:08,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410283442] [2021-11-07 00:55:08,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:08,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:08,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:09,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:09,376 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:09,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410283442] [2021-11-07 00:55:09,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410283442] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:09,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:09,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-07 00:55:09,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219825425] [2021-11-07 00:55:09,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 00:55:09,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:09,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 00:55:09,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-07 00:55:09,378 INFO L87 Difference]: Start difference. First operand 934 states and 1230 transitions. Second operand has 12 states, 12 states have (on average 7.916666666666667) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:10,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:10,752 INFO L93 Difference]: Finished difference Result 1937 states and 2551 transitions. [2021-11-07 00:55:10,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 00:55:10,753 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.916666666666667) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 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 95 [2021-11-07 00:55:10,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:10,763 INFO L225 Difference]: With dead ends: 1937 [2021-11-07 00:55:10,763 INFO L226 Difference]: Without dead ends: 1824 [2021-11-07 00:55:10,764 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2021-11-07 00:55:10,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2021-11-07 00:55:10,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 919. [2021-11-07 00:55:10,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 897 states have (on average 1.346711259754738) internal successors, (1208), 918 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:10,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1208 transitions. [2021-11-07 00:55:10,889 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1208 transitions. Word has length 95 [2021-11-07 00:55:10,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:10,889 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1208 transitions. [2021-11-07 00:55:10,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.916666666666667) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:10,890 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1208 transitions. [2021-11-07 00:55:10,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 00:55:10,892 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:10,893 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:10,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 00:55:10,893 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:55:10,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:10,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1249049709, now seen corresponding path program 1 times [2021-11-07 00:55:10,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:10,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701769362] [2021-11-07 00:55:10,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:10,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:10,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:11,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:11,097 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:11,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701769362] [2021-11-07 00:55:11,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701769362] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:11,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:11,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-07 00:55:11,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321401258] [2021-11-07 00:55:11,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 00:55:11,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:11,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 00:55:11,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-07 00:55:11,100 INFO L87 Difference]: Start difference. First operand 919 states and 1208 transitions. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 9 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) [2021-11-07 00:55:12,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:12,727 INFO L93 Difference]: Finished difference Result 1470 states and 1934 transitions. [2021-11-07 00:55:12,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 00:55:12,728 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 9 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 [2021-11-07 00:55:12,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:12,735 INFO L225 Difference]: With dead ends: 1470 [2021-11-07 00:55:12,735 INFO L226 Difference]: Without dead ends: 1089 [2021-11-07 00:55:12,736 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-11-07 00:55:12,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-11-07 00:55:12,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 919. [2021-11-07 00:55:12,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 897 states have (on average 1.3444816053511706) internal successors, (1206), 918 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:12,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1206 transitions. [2021-11-07 00:55:12,867 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1206 transitions. Word has length 96 [2021-11-07 00:55:12,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:12,868 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1206 transitions. [2021-11-07 00:55:12,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 9 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) [2021-11-07 00:55:12,868 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1206 transitions. [2021-11-07 00:55:12,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 00:55:12,871 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:12,871 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:12,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 00:55:12,872 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:55:12,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:12,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1573191597, now seen corresponding path program 1 times [2021-11-07 00:55:12,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:12,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839222034] [2021-11-07 00:55:12,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:12,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:12,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:13,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:13,024 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:13,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839222034] [2021-11-07 00:55:13,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839222034] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:13,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:13,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 00:55:13,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134082831] [2021-11-07 00:55:13,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:55:13,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:13,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:55:13,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:55:13,027 INFO L87 Difference]: Start difference. First operand 919 states and 1206 transitions. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 7 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) [2021-11-07 00:55:14,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:14,461 INFO L93 Difference]: Finished difference Result 1760 states and 2309 transitions. [2021-11-07 00:55:14,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 00:55:14,461 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 7 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 [2021-11-07 00:55:14,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:14,470 INFO L225 Difference]: With dead ends: 1760 [2021-11-07 00:55:14,470 INFO L226 Difference]: Without dead ends: 1611 [2021-11-07 00:55:14,472 INFO L786 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 [2021-11-07 00:55:14,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2021-11-07 00:55:14,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 919. [2021-11-07 00:55:14,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 897 states have (on average 1.3422519509476032) internal successors, (1204), 918 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:14,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1204 transitions. [2021-11-07 00:55:14,604 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1204 transitions. Word has length 96 [2021-11-07 00:55:14,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:14,605 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1204 transitions. [2021-11-07 00:55:14,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 7 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) [2021-11-07 00:55:14,605 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1204 transitions. [2021-11-07 00:55:14,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 00:55:14,608 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:14,608 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:14,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 00:55:14,609 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:55:14,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:14,609 INFO L85 PathProgramCache]: Analyzing trace with hash 474771949, now seen corresponding path program 1 times [2021-11-07 00:55:14,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:14,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069775344] [2021-11-07 00:55:14,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:14,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:14,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:14,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:14,741 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:14,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069775344] [2021-11-07 00:55:14,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069775344] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:14,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:14,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 00:55:14,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643485582] [2021-11-07 00:55:14,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:55:14,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:14,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:55:14,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:55:14,744 INFO L87 Difference]: Start difference. First operand 919 states and 1204 transitions. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 7 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) [2021-11-07 00:55:15,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:15,998 INFO L93 Difference]: Finished difference Result 1606 states and 2087 transitions. [2021-11-07 00:55:15,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 00:55:15,998 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 7 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 [2021-11-07 00:55:15,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:16,007 INFO L225 Difference]: With dead ends: 1606 [2021-11-07 00:55:16,007 INFO L226 Difference]: Without dead ends: 1587 [2021-11-07 00:55:16,008 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-11-07 00:55:16,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2021-11-07 00:55:16,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 919. [2021-11-07 00:55:16,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 897 states have (on average 1.3400222965440356) internal successors, (1202), 918 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:16,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1202 transitions. [2021-11-07 00:55:16,147 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1202 transitions. Word has length 96 [2021-11-07 00:55:16,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:16,148 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1202 transitions. [2021-11-07 00:55:16,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 7 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) [2021-11-07 00:55:16,148 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1202 transitions. [2021-11-07 00:55:16,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 00:55:16,151 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:16,152 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:16,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 00:55:16,152 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:55:16,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:16,153 INFO L85 PathProgramCache]: Analyzing trace with hash 122001069, now seen corresponding path program 1 times [2021-11-07 00:55:16,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:16,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445606984] [2021-11-07 00:55:16,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:16,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:16,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:16,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:16,297 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:16,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445606984] [2021-11-07 00:55:16,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445606984] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:16,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:16,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 00:55:16,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764593318] [2021-11-07 00:55:16,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:55:16,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:16,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:55:16,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:55:16,299 INFO L87 Difference]: Start difference. First operand 919 states and 1202 transitions. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 7 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) [2021-11-07 00:55:17,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:17,732 INFO L93 Difference]: Finished difference Result 1844 states and 2421 transitions. [2021-11-07 00:55:17,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 00:55:17,732 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 7 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 [2021-11-07 00:55:17,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:17,740 INFO L225 Difference]: With dead ends: 1844 [2021-11-07 00:55:17,741 INFO L226 Difference]: Without dead ends: 1636 [2021-11-07 00:55:17,742 INFO L786 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 [2021-11-07 00:55:17,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2021-11-07 00:55:17,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 919. [2021-11-07 00:55:17,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 897 states have (on average 1.3377926421404682) internal successors, (1200), 918 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:17,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1200 transitions. [2021-11-07 00:55:17,913 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1200 transitions. Word has length 96 [2021-11-07 00:55:17,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:17,913 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1200 transitions. [2021-11-07 00:55:17,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 7 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) [2021-11-07 00:55:17,914 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1200 transitions. [2021-11-07 00:55:17,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 00:55:17,917 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:17,917 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:17,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 00:55:17,918 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:55:17,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:17,918 INFO L85 PathProgramCache]: Analyzing trace with hash 87823981, now seen corresponding path program 1 times [2021-11-07 00:55:17,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:17,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701882505] [2021-11-07 00:55:17,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:17,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:17,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:18,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:18,173 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:18,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701882505] [2021-11-07 00:55:18,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701882505] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:18,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:18,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-07 00:55:18,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807380628] [2021-11-07 00:55:18,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 00:55:18,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:18,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 00:55:18,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-07 00:55:18,176 INFO L87 Difference]: Start difference. First operand 919 states and 1200 transitions. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 10 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) [2021-11-07 00:55:20,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:20,697 INFO L93 Difference]: Finished difference Result 2354 states and 3087 transitions. [2021-11-07 00:55:20,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 00:55:20,697 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 10 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 [2021-11-07 00:55:20,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:20,709 INFO L225 Difference]: With dead ends: 2354 [2021-11-07 00:55:20,709 INFO L226 Difference]: Without dead ends: 2227 [2021-11-07 00:55:20,711 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2021-11-07 00:55:20,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2227 states. [2021-11-07 00:55:20,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2227 to 924. [2021-11-07 00:55:20,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 902 states have (on average 1.335920177383592) internal successors, (1205), 923 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:20,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1205 transitions. [2021-11-07 00:55:20,937 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1205 transitions. Word has length 96 [2021-11-07 00:55:20,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:20,937 INFO L470 AbstractCegarLoop]: Abstraction has 924 states and 1205 transitions. [2021-11-07 00:55:20,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 10 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) [2021-11-07 00:55:20,938 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1205 transitions. [2021-11-07 00:55:20,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 00:55:20,940 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:20,940 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:20,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 00:55:20,941 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:55:20,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:20,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1905411411, now seen corresponding path program 1 times [2021-11-07 00:55:20,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:20,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702358777] [2021-11-07 00:55:20,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:20,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:20,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:21,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:21,089 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:21,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702358777] [2021-11-07 00:55:21,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702358777] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:21,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:21,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 00:55:21,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697580199] [2021-11-07 00:55:21,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:55:21,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:21,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:55:21,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:55:21,092 INFO L87 Difference]: Start difference. First operand 924 states and 1205 transitions. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 7 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) [2021-11-07 00:55:22,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:22,602 INFO L93 Difference]: Finished difference Result 1811 states and 2373 transitions. [2021-11-07 00:55:22,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 00:55:22,603 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 7 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 [2021-11-07 00:55:22,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:22,612 INFO L225 Difference]: With dead ends: 1811 [2021-11-07 00:55:22,613 INFO L226 Difference]: Without dead ends: 1641 [2021-11-07 00:55:22,614 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-11-07 00:55:22,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1641 states. [2021-11-07 00:55:22,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1641 to 924. [2021-11-07 00:55:22,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 902 states have (on average 1.334811529933481) internal successors, (1204), 923 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:22,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1204 transitions. [2021-11-07 00:55:22,742 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1204 transitions. Word has length 96 [2021-11-07 00:55:22,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:22,742 INFO L470 AbstractCegarLoop]: Abstraction has 924 states and 1204 transitions. [2021-11-07 00:55:22,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 7 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) [2021-11-07 00:55:22,743 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1204 transitions. [2021-11-07 00:55:22,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 00:55:22,745 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:22,745 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:22,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-07 00:55:22,746 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:55:22,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:22,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1768372077, now seen corresponding path program 1 times [2021-11-07 00:55:22,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:22,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735642953] [2021-11-07 00:55:22,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:22,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:22,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:22,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:22,890 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:22,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735642953] [2021-11-07 00:55:22,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735642953] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:22,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:22,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 00:55:22,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231641182] [2021-11-07 00:55:22,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:55:22,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:22,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:55:22,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:55:22,893 INFO L87 Difference]: Start difference. First operand 924 states and 1204 transitions. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 7 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) [2021-11-07 00:55:24,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:24,479 INFO L93 Difference]: Finished difference Result 1738 states and 2269 transitions. [2021-11-07 00:55:24,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 00:55:24,480 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 7 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 [2021-11-07 00:55:24,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:24,484 INFO L225 Difference]: With dead ends: 1738 [2021-11-07 00:55:24,484 INFO L226 Difference]: Without dead ends: 1611 [2021-11-07 00:55:24,485 INFO L786 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 [2021-11-07 00:55:24,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2021-11-07 00:55:24,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 924. [2021-11-07 00:55:24,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 902 states have (on average 1.3337028824833703) internal successors, (1203), 923 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:24,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1203 transitions. [2021-11-07 00:55:24,629 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1203 transitions. Word has length 96 [2021-11-07 00:55:24,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:24,629 INFO L470 AbstractCegarLoop]: Abstraction has 924 states and 1203 transitions. [2021-11-07 00:55:24,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 7 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) [2021-11-07 00:55:24,629 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1203 transitions. [2021-11-07 00:55:24,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-07 00:55:24,631 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:24,631 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:24,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-07 00:55:24,631 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:55:24,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:24,632 INFO L85 PathProgramCache]: Analyzing trace with hash 372640941, now seen corresponding path program 1 times [2021-11-07 00:55:24,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:24,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741557649] [2021-11-07 00:55:24,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:24,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:24,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:24,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:24,764 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:24,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741557649] [2021-11-07 00:55:24,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741557649] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:24,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:24,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 00:55:24,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277900673] [2021-11-07 00:55:24,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:55:24,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:24,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:55:24,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:55:24,767 INFO L87 Difference]: Start difference. First operand 924 states and 1203 transitions. Second operand has 8 states, 8 states have (on average 12.125) 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) [2021-11-07 00:55:26,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:26,322 INFO L93 Difference]: Finished difference Result 1710 states and 2220 transitions. [2021-11-07 00:55:26,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 00:55:26,323 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) 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 [2021-11-07 00:55:26,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:26,325 INFO L225 Difference]: With dead ends: 1710 [2021-11-07 00:55:26,325 INFO L226 Difference]: Without dead ends: 1592 [2021-11-07 00:55:26,326 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2021-11-07 00:55:26,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2021-11-07 00:55:26,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 924. [2021-11-07 00:55:26,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 902 states have (on average 1.3314855875831486) internal successors, (1201), 923 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:26,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1201 transitions. [2021-11-07 00:55:26,450 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1201 transitions. Word has length 97 [2021-11-07 00:55:26,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:26,451 INFO L470 AbstractCegarLoop]: Abstraction has 924 states and 1201 transitions. [2021-11-07 00:55:26,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) 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) [2021-11-07 00:55:26,451 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1201 transitions. [2021-11-07 00:55:26,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-07 00:55:26,453 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:26,454 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:26,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-07 00:55:26,454 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:55:26,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:26,455 INFO L85 PathProgramCache]: Analyzing trace with hash 620938253, now seen corresponding path program 1 times [2021-11-07 00:55:26,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:26,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780841948] [2021-11-07 00:55:26,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:26,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:26,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:26,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:26,593 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:26,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780841948] [2021-11-07 00:55:26,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780841948] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:26,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:26,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 00:55:26,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589240597] [2021-11-07 00:55:26,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:55:26,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:26,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:55:26,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:55:26,595 INFO L87 Difference]: Start difference. First operand 924 states and 1201 transitions. Second operand has 8 states, 8 states have (on average 12.125) 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) [2021-11-07 00:55:28,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:28,033 INFO L93 Difference]: Finished difference Result 1700 states and 2205 transitions. [2021-11-07 00:55:28,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 00:55:28,034 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) 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 [2021-11-07 00:55:28,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:28,036 INFO L225 Difference]: With dead ends: 1700 [2021-11-07 00:55:28,036 INFO L226 Difference]: Without dead ends: 1592 [2021-11-07 00:55:28,037 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2021-11-07 00:55:28,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2021-11-07 00:55:28,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 924. [2021-11-07 00:55:28,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 902 states have (on average 1.3303769401330376) internal successors, (1200), 923 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:28,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1200 transitions. [2021-11-07 00:55:28,171 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1200 transitions. Word has length 97 [2021-11-07 00:55:28,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:28,171 INFO L470 AbstractCegarLoop]: Abstraction has 924 states and 1200 transitions. [2021-11-07 00:55:28,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) 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) [2021-11-07 00:55:28,172 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1200 transitions. [2021-11-07 00:55:28,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-07 00:55:28,174 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:28,174 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:28,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-07 00:55:28,174 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:55:28,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:28,175 INFO L85 PathProgramCache]: Analyzing trace with hash 108985709, now seen corresponding path program 1 times [2021-11-07 00:55:28,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:28,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652687343] [2021-11-07 00:55:28,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:28,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:28,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:28,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:28,437 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:28,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652687343] [2021-11-07 00:55:28,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652687343] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:28,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:28,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-07 00:55:28,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219120243] [2021-11-07 00:55:28,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 00:55:28,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:28,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 00:55:28,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-07 00:55:28,443 INFO L87 Difference]: Start difference. First operand 924 states and 1200 transitions. Second operand has 11 states, 11 states have (on average 8.818181818181818) internal successors, (97), 10 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) [2021-11-07 00:55:31,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:31,085 INFO L93 Difference]: Finished difference Result 2249 states and 2933 transitions. [2021-11-07 00:55:31,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 00:55:31,085 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.818181818181818) internal successors, (97), 10 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 [2021-11-07 00:55:31,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:31,089 INFO L225 Difference]: With dead ends: 2249 [2021-11-07 00:55:31,089 INFO L226 Difference]: Without dead ends: 2141 [2021-11-07 00:55:31,090 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2021-11-07 00:55:31,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2141 states. [2021-11-07 00:55:31,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2141 to 929. [2021-11-07 00:55:31,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 907 states have (on average 1.328555678059537) internal successors, (1205), 928 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:31,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1205 transitions. [2021-11-07 00:55:31,231 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1205 transitions. Word has length 97 [2021-11-07 00:55:31,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:31,231 INFO L470 AbstractCegarLoop]: Abstraction has 929 states and 1205 transitions. [2021-11-07 00:55:31,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.818181818181818) internal successors, (97), 10 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) [2021-11-07 00:55:31,231 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1205 transitions. [2021-11-07 00:55:31,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-07 00:55:31,233 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:31,234 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:31,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-07 00:55:31,234 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:55:31,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:31,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1778659085, now seen corresponding path program 1 times [2021-11-07 00:55:31,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:31,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865318221] [2021-11-07 00:55:31,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:31,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:31,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:31,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:31,459 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:31,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865318221] [2021-11-07 00:55:31,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865318221] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:31,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:31,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 00:55:31,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909355641] [2021-11-07 00:55:31,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:55:31,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:31,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:55:31,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:55:31,461 INFO L87 Difference]: Start difference. First operand 929 states and 1205 transitions. Second operand has 8 states, 8 states have (on average 12.125) 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) [2021-11-07 00:55:32,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:32,992 INFO L93 Difference]: Finished difference Result 1743 states and 2268 transitions. [2021-11-07 00:55:32,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 00:55:32,994 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) 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 [2021-11-07 00:55:32,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:32,998 INFO L225 Difference]: With dead ends: 1743 [2021-11-07 00:55:32,998 INFO L226 Difference]: Without dead ends: 1616 [2021-11-07 00:55:32,999 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-11-07 00:55:33,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2021-11-07 00:55:33,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 924. [2021-11-07 00:55:33,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 902 states have (on average 1.329268292682927) internal successors, (1199), 923 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:33,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1199 transitions. [2021-11-07 00:55:33,212 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1199 transitions. Word has length 97 [2021-11-07 00:55:33,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:33,213 INFO L470 AbstractCegarLoop]: Abstraction has 924 states and 1199 transitions. [2021-11-07 00:55:33,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) 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) [2021-11-07 00:55:33,213 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1199 transitions. [2021-11-07 00:55:33,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-07 00:55:33,215 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:33,215 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:33,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-07 00:55:33,218 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:55:33,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:33,219 INFO L85 PathProgramCache]: Analyzing trace with hash 646247383, now seen corresponding path program 1 times [2021-11-07 00:55:33,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:33,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289359024] [2021-11-07 00:55:33,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:33,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:33,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:33,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:33,601 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:33,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289359024] [2021-11-07 00:55:33,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289359024] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:33,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:33,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-07 00:55:33,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945750058] [2021-11-07 00:55:33,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 00:55:33,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:33,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 00:55:33,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-07 00:55:33,603 INFO L87 Difference]: Start difference. First operand 924 states and 1199 transitions. Second operand has 11 states, 11 states have (on average 8.818181818181818) internal successors, (97), 10 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) [2021-11-07 00:55:35,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:35,094 INFO L93 Difference]: Finished difference Result 1514 states and 1859 transitions. [2021-11-07 00:55:35,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 00:55:35,094 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.818181818181818) internal successors, (97), 10 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 [2021-11-07 00:55:35,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:35,096 INFO L225 Difference]: With dead ends: 1514 [2021-11-07 00:55:35,096 INFO L226 Difference]: Without dead ends: 1185 [2021-11-07 00:55:35,097 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2021-11-07 00:55:35,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2021-11-07 00:55:35,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 693. [2021-11-07 00:55:35,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 677 states have (on average 1.3234859675036927) internal successors, (896), 692 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:35,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 896 transitions. [2021-11-07 00:55:35,219 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 896 transitions. Word has length 97 [2021-11-07 00:55:35,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:35,219 INFO L470 AbstractCegarLoop]: Abstraction has 693 states and 896 transitions. [2021-11-07 00:55:35,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.818181818181818) internal successors, (97), 10 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) [2021-11-07 00:55:35,219 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 896 transitions. [2021-11-07 00:55:35,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 00:55:35,221 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:35,221 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:35,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-07 00:55:35,221 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:55:35,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:35,221 INFO L85 PathProgramCache]: Analyzing trace with hash 789636914, now seen corresponding path program 1 times [2021-11-07 00:55:35,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:35,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175553384] [2021-11-07 00:55:35,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:35,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:35,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:35,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:35,432 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:35,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175553384] [2021-11-07 00:55:35,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175553384] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:35,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:35,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-07 00:55:35,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200725444] [2021-11-07 00:55:35,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 00:55:35,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:35,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 00:55:35,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-07 00:55:35,434 INFO L87 Difference]: Start difference. First operand 693 states and 896 transitions. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:38,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:38,003 INFO L93 Difference]: Finished difference Result 2172 states and 2843 transitions. [2021-11-07 00:55:38,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 00:55:38,003 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2021-11-07 00:55:38,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:38,006 INFO L225 Difference]: With dead ends: 2172 [2021-11-07 00:55:38,006 INFO L226 Difference]: Without dead ends: 1930 [2021-11-07 00:55:38,007 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2021-11-07 00:55:38,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2021-11-07 00:55:38,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 703. [2021-11-07 00:55:38,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 687 states have (on average 1.3187772925764192) internal successors, (906), 702 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:38,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 906 transitions. [2021-11-07 00:55:38,155 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 906 transitions. Word has length 98 [2021-11-07 00:55:38,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:38,155 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 906 transitions. [2021-11-07 00:55:38,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:38,155 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 906 transitions. [2021-11-07 00:55:38,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 00:55:38,157 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:38,157 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:38,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-07 00:55:38,157 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:55:38,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:38,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1331918194, now seen corresponding path program 1 times [2021-11-07 00:55:38,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:38,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260570528] [2021-11-07 00:55:38,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:38,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:38,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:38,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:38,286 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:38,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260570528] [2021-11-07 00:55:38,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260570528] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:38,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:38,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 00:55:38,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873378020] [2021-11-07 00:55:38,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:55:38,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:38,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:55:38,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:55:38,288 INFO L87 Difference]: Start difference. First operand 703 states and 906 transitions. Second operand has 8 states, 8 states have (on average 12.25) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:39,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:39,418 INFO L93 Difference]: Finished difference Result 1372 states and 1772 transitions. [2021-11-07 00:55:39,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 00:55:39,418 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2021-11-07 00:55:39,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:39,420 INFO L225 Difference]: With dead ends: 1372 [2021-11-07 00:55:39,420 INFO L226 Difference]: Without dead ends: 1247 [2021-11-07 00:55:39,421 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-11-07 00:55:39,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2021-11-07 00:55:39,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 703. [2021-11-07 00:55:39,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 687 states have (on average 1.3158660844250365) internal successors, (904), 702 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:39,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 904 transitions. [2021-11-07 00:55:39,590 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 904 transitions. Word has length 98 [2021-11-07 00:55:39,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:39,590 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 904 transitions. [2021-11-07 00:55:39,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:39,590 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 904 transitions. [2021-11-07 00:55:39,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 00:55:39,592 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:39,592 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:39,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-07 00:55:39,593 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:55:39,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:39,593 INFO L85 PathProgramCache]: Analyzing trace with hash 979147314, now seen corresponding path program 1 times [2021-11-07 00:55:39,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:39,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130160899] [2021-11-07 00:55:39,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:39,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:39,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:39,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:39,734 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:39,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130160899] [2021-11-07 00:55:39,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130160899] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:39,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:39,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 00:55:39,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878331731] [2021-11-07 00:55:39,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:55:39,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:39,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:55:39,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:55:39,736 INFO L87 Difference]: Start difference. First operand 703 states and 904 transitions. Second operand has 8 states, 8 states have (on average 12.25) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:41,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:41,013 INFO L93 Difference]: Finished difference Result 1424 states and 1845 transitions. [2021-11-07 00:55:41,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 00:55:41,014 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2021-11-07 00:55:41,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:41,016 INFO L225 Difference]: With dead ends: 1424 [2021-11-07 00:55:41,016 INFO L226 Difference]: Without dead ends: 1263 [2021-11-07 00:55:41,017 INFO L786 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 [2021-11-07 00:55:41,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2021-11-07 00:55:41,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 703. [2021-11-07 00:55:41,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 687 states have (on average 1.3129548762736536) internal successors, (902), 702 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:41,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 902 transitions. [2021-11-07 00:55:41,159 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 902 transitions. Word has length 98 [2021-11-07 00:55:41,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:41,159 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 902 transitions. [2021-11-07 00:55:41,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:41,159 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 902 transitions. [2021-11-07 00:55:41,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 00:55:41,160 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:41,160 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:41,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-07 00:55:41,161 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:55:41,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:41,161 INFO L85 PathProgramCache]: Analyzing trace with hash 826135346, now seen corresponding path program 1 times [2021-11-07 00:55:41,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:41,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45327316] [2021-11-07 00:55:41,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:41,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:41,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:41,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:41,291 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:41,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45327316] [2021-11-07 00:55:41,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45327316] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:41,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:41,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 00:55:41,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350349860] [2021-11-07 00:55:41,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:55:41,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:41,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:55:41,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:55:41,293 INFO L87 Difference]: Start difference. First operand 703 states and 902 transitions. Second operand has 8 states, 8 states have (on average 12.25) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:42,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:42,595 INFO L93 Difference]: Finished difference Result 1371 states and 1766 transitions. [2021-11-07 00:55:42,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 00:55:42,595 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2021-11-07 00:55:42,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:42,597 INFO L225 Difference]: With dead ends: 1371 [2021-11-07 00:55:42,597 INFO L226 Difference]: Without dead ends: 1247 [2021-11-07 00:55:42,598 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2021-11-07 00:55:42,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2021-11-07 00:55:42,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 703. [2021-11-07 00:55:42,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 687 states have (on average 1.3100436681222707) internal successors, (900), 702 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:42,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 900 transitions. [2021-11-07 00:55:42,740 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 900 transitions. Word has length 98 [2021-11-07 00:55:42,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:42,740 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 900 transitions. [2021-11-07 00:55:42,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:42,740 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 900 transitions. [2021-11-07 00:55:42,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 00:55:42,741 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:42,741 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:42,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-07 00:55:42,742 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:55:42,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:42,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1011135566, now seen corresponding path program 1 times [2021-11-07 00:55:42,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:42,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024509171] [2021-11-07 00:55:42,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:42,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:42,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:42,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:42,954 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:42,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024509171] [2021-11-07 00:55:42,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024509171] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:42,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:42,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-07 00:55:42,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745879479] [2021-11-07 00:55:42,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 00:55:42,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:42,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 00:55:42,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-07 00:55:42,956 INFO L87 Difference]: Start difference. First operand 703 states and 900 transitions. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:45,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:45,557 INFO L93 Difference]: Finished difference Result 2061 states and 2681 transitions. [2021-11-07 00:55:45,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 00:55:45,557 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2021-11-07 00:55:45,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:45,561 INFO L225 Difference]: With dead ends: 2061 [2021-11-07 00:55:45,561 INFO L226 Difference]: Without dead ends: 1914 [2021-11-07 00:55:45,562 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2021-11-07 00:55:45,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1914 states. [2021-11-07 00:55:45,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1914 to 713. [2021-11-07 00:55:45,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 697 states have (on average 1.3055954088952655) internal successors, (910), 712 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:45,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 910 transitions. [2021-11-07 00:55:45,769 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 910 transitions. Word has length 98 [2021-11-07 00:55:45,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:45,769 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 910 transitions. [2021-11-07 00:55:45,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:45,770 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 910 transitions. [2021-11-07 00:55:45,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 00:55:45,771 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:45,771 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:45,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-07 00:55:45,771 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:55:45,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:45,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1884558386, now seen corresponding path program 1 times [2021-11-07 00:55:45,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:45,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053356672] [2021-11-07 00:55:45,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:45,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:45,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:45,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:45,901 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:45,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053356672] [2021-11-07 00:55:45,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053356672] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:45,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:45,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 00:55:45,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350283252] [2021-11-07 00:55:45,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:55:45,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:45,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:55:45,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:55:45,903 INFO L87 Difference]: Start difference. First operand 713 states and 910 transitions. Second operand has 8 states, 8 states have (on average 12.25) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:47,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:47,188 INFO L93 Difference]: Finished difference Result 1376 states and 1767 transitions. [2021-11-07 00:55:47,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 00:55:47,189 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2021-11-07 00:55:47,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:47,191 INFO L225 Difference]: With dead ends: 1376 [2021-11-07 00:55:47,191 INFO L226 Difference]: Without dead ends: 1257 [2021-11-07 00:55:47,192 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2021-11-07 00:55:47,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2021-11-07 00:55:47,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 713. [2021-11-07 00:55:47,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 697 states have (on average 1.302725968436155) internal successors, (908), 712 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:47,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 908 transitions. [2021-11-07 00:55:47,458 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 908 transitions. Word has length 98 [2021-11-07 00:55:47,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:47,458 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 908 transitions. [2021-11-07 00:55:47,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:47,459 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 908 transitions. [2021-11-07 00:55:47,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 00:55:47,460 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:47,461 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:47,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-07 00:55:47,461 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:55:47,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:47,462 INFO L85 PathProgramCache]: Analyzing trace with hash -401498382, now seen corresponding path program 1 times [2021-11-07 00:55:47,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:47,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449381625] [2021-11-07 00:55:47,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:47,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:47,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:47,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:47,715 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:47,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449381625] [2021-11-07 00:55:47,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449381625] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:47,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:47,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-07 00:55:47,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29953115] [2021-11-07 00:55:47,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 00:55:47,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:47,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 00:55:47,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-07 00:55:47,718 INFO L87 Difference]: Start difference. First operand 713 states and 908 transitions. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:50,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:50,293 INFO L93 Difference]: Finished difference Result 1951 states and 2529 transitions. [2021-11-07 00:55:50,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 00:55:50,294 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2021-11-07 00:55:50,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:50,297 INFO L225 Difference]: With dead ends: 1951 [2021-11-07 00:55:50,298 INFO L226 Difference]: Without dead ends: 1832 [2021-11-07 00:55:50,299 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2021-11-07 00:55:50,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2021-11-07 00:55:50,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 723. [2021-11-07 00:55:50,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 707 states have (on average 1.2984441301272984) internal successors, (918), 722 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:50,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 918 transitions. [2021-11-07 00:55:50,546 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 918 transitions. Word has length 98 [2021-11-07 00:55:50,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:50,546 INFO L470 AbstractCegarLoop]: Abstraction has 723 states and 918 transitions. [2021-11-07 00:55:50,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:50,547 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 918 transitions. [2021-11-07 00:55:50,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 00:55:50,548 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:50,548 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:50,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-07 00:55:50,549 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:55:50,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:50,549 INFO L85 PathProgramCache]: Analyzing trace with hash 726734154, now seen corresponding path program 1 times [2021-11-07 00:55:50,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:50,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863319646] [2021-11-07 00:55:50,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:50,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:50,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:50,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:50,721 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:50,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863319646] [2021-11-07 00:55:50,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863319646] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:50,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:50,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 00:55:50,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029649377] [2021-11-07 00:55:50,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:55:50,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:50,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:55:50,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:55:50,723 INFO L87 Difference]: Start difference. First operand 723 states and 918 transitions. Second operand has 8 states, 8 states have (on average 12.25) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:51,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:51,910 INFO L93 Difference]: Finished difference Result 1333 states and 1697 transitions. [2021-11-07 00:55:51,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 00:55:51,911 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2021-11-07 00:55:51,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:51,912 INFO L225 Difference]: With dead ends: 1333 [2021-11-07 00:55:51,912 INFO L226 Difference]: Without dead ends: 1233 [2021-11-07 00:55:51,913 INFO L786 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 [2021-11-07 00:55:51,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-11-07 00:55:52,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 721. [2021-11-07 00:55:52,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 705 states have (on average 1.29645390070922) internal successors, (914), 720 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:52,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 914 transitions. [2021-11-07 00:55:52,143 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 914 transitions. Word has length 98 [2021-11-07 00:55:52,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:52,143 INFO L470 AbstractCegarLoop]: Abstraction has 721 states and 914 transitions. [2021-11-07 00:55:52,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:52,143 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 914 transitions. [2021-11-07 00:55:52,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-07 00:55:52,144 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:52,144 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:52,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-07 00:55:52,144 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:55:52,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:52,145 INFO L85 PathProgramCache]: Analyzing trace with hash 729259016, now seen corresponding path program 1 times [2021-11-07 00:55:52,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:52,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994776388] [2021-11-07 00:55:52,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:52,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:52,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:52,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:52,274 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:52,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994776388] [2021-11-07 00:55:52,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994776388] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:52,275 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:52,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 00:55:52,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880607175] [2021-11-07 00:55:52,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:55:52,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:52,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:55:52,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:55:52,276 INFO L87 Difference]: Start difference. First operand 721 states and 914 transitions. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:53,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:53,482 INFO L93 Difference]: Finished difference Result 1337 states and 1699 transitions. [2021-11-07 00:55:53,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 00:55:53,482 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 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 99 [2021-11-07 00:55:53,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:53,484 INFO L225 Difference]: With dead ends: 1337 [2021-11-07 00:55:53,484 INFO L226 Difference]: Without dead ends: 1233 [2021-11-07 00:55:53,485 INFO L786 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 [2021-11-07 00:55:53,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-11-07 00:55:53,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 721. [2021-11-07 00:55:53,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 705 states have (on average 1.2936170212765958) internal successors, (912), 720 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:53,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 912 transitions. [2021-11-07 00:55:53,690 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 912 transitions. Word has length 99 [2021-11-07 00:55:53,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:53,691 INFO L470 AbstractCegarLoop]: Abstraction has 721 states and 912 transitions. [2021-11-07 00:55:53,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:53,691 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 912 transitions. [2021-11-07 00:55:53,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-07 00:55:53,692 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:53,692 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:53,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-07 00:55:53,693 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:55:53,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:53,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1775150408, now seen corresponding path program 1 times [2021-11-07 00:55:53,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:53,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420898569] [2021-11-07 00:55:53,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:53,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:53,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:53,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:53,833 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:53,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420898569] [2021-11-07 00:55:53,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420898569] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:53,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:53,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 00:55:53,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028273086] [2021-11-07 00:55:53,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:55:53,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:53,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:55:53,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:55:53,836 INFO L87 Difference]: Start difference. First operand 721 states and 912 transitions. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:55,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:55,188 INFO L93 Difference]: Finished difference Result 1337 states and 1697 transitions. [2021-11-07 00:55:55,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 00:55:55,209 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 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 99 [2021-11-07 00:55:55,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:55,219 INFO L225 Difference]: With dead ends: 1337 [2021-11-07 00:55:55,219 INFO L226 Difference]: Without dead ends: 1233 [2021-11-07 00:55:55,223 INFO L786 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 [2021-11-07 00:55:55,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-11-07 00:55:55,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 721. [2021-11-07 00:55:55,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 705 states have (on average 1.2907801418439717) internal successors, (910), 720 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:55,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 910 transitions. [2021-11-07 00:55:55,488 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 910 transitions. Word has length 99 [2021-11-07 00:55:55,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:55,489 INFO L470 AbstractCegarLoop]: Abstraction has 721 states and 910 transitions. [2021-11-07 00:55:55,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:55,489 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 910 transitions. [2021-11-07 00:55:55,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-07 00:55:55,490 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:55,490 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:55,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-07 00:55:55,490 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:55:55,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:55,491 INFO L85 PathProgramCache]: Analyzing trace with hash -361541444, now seen corresponding path program 1 times [2021-11-07 00:55:55,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:55,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094272610] [2021-11-07 00:55:55,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:55,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:55,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:55,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:55,623 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:55,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094272610] [2021-11-07 00:55:55,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094272610] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:55,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:55,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 00:55:55,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887376759] [2021-11-07 00:55:55,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:55:55,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:55,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:55:55,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:55:55,626 INFO L87 Difference]: Start difference. First operand 721 states and 910 transitions. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:56,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:56,928 INFO L93 Difference]: Finished difference Result 1418 states and 1814 transitions. [2021-11-07 00:55:56,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 00:55:56,928 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 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 99 [2021-11-07 00:55:56,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:56,930 INFO L225 Difference]: With dead ends: 1418 [2021-11-07 00:55:56,930 INFO L226 Difference]: Without dead ends: 1271 [2021-11-07 00:55:56,930 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-11-07 00:55:56,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2021-11-07 00:55:57,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 711. [2021-11-07 00:55:57,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 695 states have (on average 1.2920863309352517) internal successors, (898), 710 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:57,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 898 transitions. [2021-11-07 00:55:57,097 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 898 transitions. Word has length 99 [2021-11-07 00:55:57,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:57,097 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 898 transitions. [2021-11-07 00:55:57,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:57,097 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 898 transitions. [2021-11-07 00:55:57,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-07 00:55:57,098 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:57,098 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:57,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-07 00:55:57,098 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:55:57,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:57,099 INFO L85 PathProgramCache]: Analyzing trace with hash -371844056, now seen corresponding path program 1 times [2021-11-07 00:55:57,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:57,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150988204] [2021-11-07 00:55:57,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:57,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:57,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:57,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:57,222 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:57,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150988204] [2021-11-07 00:55:57,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150988204] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:57,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:57,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 00:55:57,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051806470] [2021-11-07 00:55:57,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:55:57,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:57,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:55:57,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:55:57,224 INFO L87 Difference]: Start difference. First operand 711 states and 898 transitions. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:58,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:58,693 INFO L93 Difference]: Finished difference Result 1327 states and 1683 transitions. [2021-11-07 00:55:58,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 00:55:58,693 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 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 99 [2021-11-07 00:55:58,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:58,695 INFO L225 Difference]: With dead ends: 1327 [2021-11-07 00:55:58,695 INFO L226 Difference]: Without dead ends: 1223 [2021-11-07 00:55:58,695 INFO L786 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 [2021-11-07 00:55:58,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2021-11-07 00:55:58,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 711. [2021-11-07 00:55:58,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 695 states have (on average 1.289208633093525) internal successors, (896), 710 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:58,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 896 transitions. [2021-11-07 00:55:58,867 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 896 transitions. Word has length 99 [2021-11-07 00:55:58,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:58,867 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 896 transitions. [2021-11-07 00:55:58,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:58,867 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 896 transitions. [2021-11-07 00:55:58,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-07 00:55:58,868 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:58,869 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:58,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-07 00:55:58,870 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:55:58,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:58,870 INFO L85 PathProgramCache]: Analyzing trace with hash 30970824, now seen corresponding path program 1 times [2021-11-07 00:55:58,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:58,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476829162] [2021-11-07 00:55:58,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:58,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:58,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:58,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:58,997 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:58,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476829162] [2021-11-07 00:55:58,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476829162] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:58,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:58,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 00:55:58,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022695230] [2021-11-07 00:55:58,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:55:58,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:58,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:55:58,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:55:58,999 INFO L87 Difference]: Start difference. First operand 711 states and 896 transitions. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:00,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:00,335 INFO L93 Difference]: Finished difference Result 1327 states and 1681 transitions. [2021-11-07 00:56:00,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 00:56:00,335 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 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 99 [2021-11-07 00:56:00,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:00,339 INFO L225 Difference]: With dead ends: 1327 [2021-11-07 00:56:00,339 INFO L226 Difference]: Without dead ends: 1223 [2021-11-07 00:56:00,341 INFO L786 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 [2021-11-07 00:56:00,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2021-11-07 00:56:00,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 711. [2021-11-07 00:56:00,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 695 states have (on average 1.2863309352517986) internal successors, (894), 710 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:00,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 894 transitions. [2021-11-07 00:56:00,583 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 894 transitions. Word has length 99 [2021-11-07 00:56:00,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:00,583 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 894 transitions. [2021-11-07 00:56:00,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:00,584 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 894 transitions. [2021-11-07 00:56:00,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-07 00:56:00,585 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:00,585 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:00,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-07 00:56:00,586 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:56:00,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:00,586 INFO L85 PathProgramCache]: Analyzing trace with hash -169539486, now seen corresponding path program 1 times [2021-11-07 00:56:00,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:56:00,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37831042] [2021-11-07 00:56:00,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:00,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:56:00,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:00,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:00,702 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:56:00,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37831042] [2021-11-07 00:56:00,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37831042] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:00,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:00,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 00:56:00,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960130177] [2021-11-07 00:56:00,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:56:00,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:56:00,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:56:00,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:56:00,706 INFO L87 Difference]: Start difference. First operand 711 states and 894 transitions. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:01,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:01,998 INFO L93 Difference]: Finished difference Result 1364 states and 1737 transitions. [2021-11-07 00:56:01,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 00:56:01,999 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 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 99 [2021-11-07 00:56:01,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:02,000 INFO L225 Difference]: With dead ends: 1364 [2021-11-07 00:56:02,001 INFO L226 Difference]: Without dead ends: 1245 [2021-11-07 00:56:02,001 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-11-07 00:56:02,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2021-11-07 00:56:02,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 701. [2021-11-07 00:56:02,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 685 states have (on average 1.2875912408759125) internal successors, (882), 700 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:02,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 882 transitions. [2021-11-07 00:56:02,172 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 882 transitions. Word has length 99 [2021-11-07 00:56:02,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:02,172 INFO L470 AbstractCegarLoop]: Abstraction has 701 states and 882 transitions. [2021-11-07 00:56:02,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:02,172 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 882 transitions. [2021-11-07 00:56:02,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-07 00:56:02,173 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:02,173 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:02,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-11-07 00:56:02,174 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:56:02,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:02,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1710268714, now seen corresponding path program 1 times [2021-11-07 00:56:02,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:56:02,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300735934] [2021-11-07 00:56:02,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:02,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:56:02,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:02,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:02,290 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:56:02,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300735934] [2021-11-07 00:56:02,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300735934] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:02,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:02,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 00:56:02,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941398218] [2021-11-07 00:56:02,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:56:02,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:56:02,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:56:02,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:56:02,293 INFO L87 Difference]: Start difference. First operand 701 states and 882 transitions. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:03,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:03,684 INFO L93 Difference]: Finished difference Result 1520 states and 1953 transitions. [2021-11-07 00:56:03,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 00:56:03,685 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 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 99 [2021-11-07 00:56:03,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:03,687 INFO L225 Difference]: With dead ends: 1520 [2021-11-07 00:56:03,687 INFO L226 Difference]: Without dead ends: 1278 [2021-11-07 00:56:03,688 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-11-07 00:56:03,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2021-11-07 00:56:03,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 691. [2021-11-07 00:56:03,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 675 states have (on average 1.288888888888889) internal successors, (870), 690 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:03,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 870 transitions. [2021-11-07 00:56:03,898 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 870 transitions. Word has length 99 [2021-11-07 00:56:03,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:03,899 INFO L470 AbstractCegarLoop]: Abstraction has 691 states and 870 transitions. [2021-11-07 00:56:03,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:03,899 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 870 transitions. [2021-11-07 00:56:03,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-07 00:56:03,900 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:03,900 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:03,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-07 00:56:03,900 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:56:03,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:03,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1459749737, now seen corresponding path program 1 times [2021-11-07 00:56:03,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:56:03,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475281672] [2021-11-07 00:56:03,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:03,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:56:03,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:04,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:04,024 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:56:04,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475281672] [2021-11-07 00:56:04,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475281672] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:04,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:04,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 00:56:04,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177150296] [2021-11-07 00:56:04,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:56:04,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:56:04,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:56:04,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:56:04,026 INFO L87 Difference]: Start difference. First operand 691 states and 870 transitions. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:05,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:05,356 INFO L93 Difference]: Finished difference Result 1311 states and 1658 transitions. [2021-11-07 00:56:05,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 00:56:05,357 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-07 00:56:05,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:05,358 INFO L225 Difference]: With dead ends: 1311 [2021-11-07 00:56:05,358 INFO L226 Difference]: Without dead ends: 1203 [2021-11-07 00:56:05,358 INFO L786 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 [2021-11-07 00:56:05,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2021-11-07 00:56:05,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 691. [2021-11-07 00:56:05,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 675 states have (on average 1.285925925925926) internal successors, (868), 690 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:05,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 868 transitions. [2021-11-07 00:56:05,530 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 868 transitions. Word has length 100 [2021-11-07 00:56:05,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:05,530 INFO L470 AbstractCegarLoop]: Abstraction has 691 states and 868 transitions. [2021-11-07 00:56:05,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:05,530 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 868 transitions. [2021-11-07 00:56:05,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-07 00:56:05,531 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:05,531 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:05,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-11-07 00:56:05,531 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:56:05,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:05,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1106978857, now seen corresponding path program 1 times [2021-11-07 00:56:05,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:56:05,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987575463] [2021-11-07 00:56:05,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:05,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:56:05,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:05,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:05,647 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:56:05,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987575463] [2021-11-07 00:56:05,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987575463] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:05,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:05,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 00:56:05,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926391753] [2021-11-07 00:56:05,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:56:05,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:56:05,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:56:05,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:56:05,649 INFO L87 Difference]: Start difference. First operand 691 states and 868 transitions. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:06,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:06,925 INFO L93 Difference]: Finished difference Result 1360 states and 1728 transitions. [2021-11-07 00:56:06,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 00:56:06,926 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-07 00:56:06,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:06,927 INFO L225 Difference]: With dead ends: 1360 [2021-11-07 00:56:06,927 INFO L226 Difference]: Without dead ends: 1235 [2021-11-07 00:56:06,927 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2021-11-07 00:56:06,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2021-11-07 00:56:07,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 691. [2021-11-07 00:56:07,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 675 states have (on average 1.2829629629629629) internal successors, (866), 690 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:07,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 866 transitions. [2021-11-07 00:56:07,110 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 866 transitions. Word has length 100 [2021-11-07 00:56:07,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:07,110 INFO L470 AbstractCegarLoop]: Abstraction has 691 states and 866 transitions. [2021-11-07 00:56:07,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:07,111 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 866 transitions. [2021-11-07 00:56:07,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-07 00:56:07,112 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:07,112 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:07,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-11-07 00:56:07,113 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:56:07,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:07,113 INFO L85 PathProgramCache]: Analyzing trace with hash 235319639, now seen corresponding path program 1 times [2021-11-07 00:56:07,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:56:07,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406391936] [2021-11-07 00:56:07,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:07,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:56:07,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:07,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:07,315 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:56:07,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406391936] [2021-11-07 00:56:07,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406391936] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:07,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:07,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-07 00:56:07,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902322538] [2021-11-07 00:56:07,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 00:56:07,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:56:07,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 00:56:07,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-07 00:56:07,318 INFO L87 Difference]: Start difference. First operand 691 states and 866 transitions. Second operand has 11 states, 11 states have (on average 9.090909090909092) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:10,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:10,211 INFO L93 Difference]: Finished difference Result 2081 states and 2677 transitions. [2021-11-07 00:56:10,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 00:56:10,211 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 9.090909090909092) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-07 00:56:10,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:10,213 INFO L225 Difference]: With dead ends: 2081 [2021-11-07 00:56:10,213 INFO L226 Difference]: Without dead ends: 1912 [2021-11-07 00:56:10,214 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2021-11-07 00:56:10,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1912 states. [2021-11-07 00:56:10,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1912 to 701. [2021-11-07 00:56:10,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 685 states have (on average 1.2788321167883212) internal successors, (876), 700 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:10,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 876 transitions. [2021-11-07 00:56:10,414 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 876 transitions. Word has length 100 [2021-11-07 00:56:10,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:10,414 INFO L470 AbstractCegarLoop]: Abstraction has 701 states and 876 transitions. [2021-11-07 00:56:10,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.090909090909092) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:10,414 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 876 transitions. [2021-11-07 00:56:10,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-07 00:56:10,415 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:10,415 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:10,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-11-07 00:56:10,416 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:56:10,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:10,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1499979031, now seen corresponding path program 1 times [2021-11-07 00:56:10,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:56:10,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376458622] [2021-11-07 00:56:10,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:10,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:56:10,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:10,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:10,536 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:56:10,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376458622] [2021-11-07 00:56:10,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376458622] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:10,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:10,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 00:56:10,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410249617] [2021-11-07 00:56:10,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:56:10,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:56:10,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:56:10,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:56:10,539 INFO L87 Difference]: Start difference. First operand 701 states and 876 transitions. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:11,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:11,859 INFO L93 Difference]: Finished difference Result 1321 states and 1664 transitions. [2021-11-07 00:56:11,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 00:56:11,860 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-07 00:56:11,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:11,863 INFO L225 Difference]: With dead ends: 1321 [2021-11-07 00:56:11,863 INFO L226 Difference]: Without dead ends: 1213 [2021-11-07 00:56:11,864 INFO L786 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 [2021-11-07 00:56:11,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2021-11-07 00:56:12,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 701. [2021-11-07 00:56:12,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 685 states have (on average 1.275912408759124) internal successors, (874), 700 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:12,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 874 transitions. [2021-11-07 00:56:12,107 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 874 transitions. Word has length 100 [2021-11-07 00:56:12,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:12,108 INFO L470 AbstractCegarLoop]: Abstraction has 701 states and 874 transitions. [2021-11-07 00:56:12,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:12,108 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 874 transitions. [2021-11-07 00:56:12,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-07 00:56:12,109 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:12,109 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:12,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-11-07 00:56:12,109 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:56:12,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:12,110 INFO L85 PathProgramCache]: Analyzing trace with hash -2111792681, now seen corresponding path program 1 times [2021-11-07 00:56:12,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:56:12,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577293809] [2021-11-07 00:56:12,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:12,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:56:12,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:12,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:12,230 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:56:12,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577293809] [2021-11-07 00:56:12,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577293809] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:12,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:12,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 00:56:12,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154270704] [2021-11-07 00:56:12,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:56:12,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:56:12,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:56:12,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:56:12,233 INFO L87 Difference]: Start difference. First operand 701 states and 874 transitions. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:13,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:13,500 INFO L93 Difference]: Finished difference Result 1321 states and 1660 transitions. [2021-11-07 00:56:13,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 00:56:13,501 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-07 00:56:13,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:13,502 INFO L225 Difference]: With dead ends: 1321 [2021-11-07 00:56:13,503 INFO L226 Difference]: Without dead ends: 1213 [2021-11-07 00:56:13,503 INFO L786 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 [2021-11-07 00:56:13,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2021-11-07 00:56:13,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 701. [2021-11-07 00:56:13,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 685 states have (on average 1.272992700729927) internal successors, (872), 700 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:13,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 872 transitions. [2021-11-07 00:56:13,702 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 872 transitions. Word has length 100 [2021-11-07 00:56:13,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:13,702 INFO L470 AbstractCegarLoop]: Abstraction has 701 states and 872 transitions. [2021-11-07 00:56:13,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:13,703 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 872 transitions. [2021-11-07 00:56:13,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-07 00:56:13,704 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:13,704 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:13,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-11-07 00:56:13,705 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:56:13,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:13,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1915351849, now seen corresponding path program 1 times [2021-11-07 00:56:13,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:56:13,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028044748] [2021-11-07 00:56:13,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:13,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:56:13,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:13,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:13,825 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:56:13,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028044748] [2021-11-07 00:56:13,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028044748] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:13,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:13,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 00:56:13,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096255536] [2021-11-07 00:56:13,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:56:13,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:56:13,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:56:13,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:56:13,827 INFO L87 Difference]: Start difference. First operand 701 states and 872 transitions. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:15,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:15,340 INFO L93 Difference]: Finished difference Result 1219 states and 1522 transitions. [2021-11-07 00:56:15,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 00:56:15,340 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-07 00:56:15,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:15,341 INFO L225 Difference]: With dead ends: 1219 [2021-11-07 00:56:15,342 INFO L226 Difference]: Without dead ends: 1213 [2021-11-07 00:56:15,342 INFO L786 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 [2021-11-07 00:56:15,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2021-11-07 00:56:15,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 701. [2021-11-07 00:56:15,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 685 states have (on average 1.27007299270073) internal successors, (870), 700 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:15,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 870 transitions. [2021-11-07 00:56:15,558 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 870 transitions. Word has length 100 [2021-11-07 00:56:15,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:15,558 INFO L470 AbstractCegarLoop]: Abstraction has 701 states and 870 transitions. [2021-11-07 00:56:15,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:15,558 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 870 transitions. [2021-11-07 00:56:15,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-07 00:56:15,559 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:15,559 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:15,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-11-07 00:56:15,559 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:56:15,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:15,560 INFO L85 PathProgramCache]: Analyzing trace with hash 450158487, now seen corresponding path program 1 times [2021-11-07 00:56:15,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:56:15,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747544021] [2021-11-07 00:56:15,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:15,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:56:15,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:15,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:15,681 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:56:15,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747544021] [2021-11-07 00:56:15,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747544021] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:15,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:15,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 00:56:15,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426549575] [2021-11-07 00:56:15,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:56:15,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:56:15,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:56:15,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:56:15,684 INFO L87 Difference]: Start difference. First operand 701 states and 870 transitions. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:17,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:17,096 INFO L93 Difference]: Finished difference Result 1219 states and 1520 transitions. [2021-11-07 00:56:17,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 00:56:17,096 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-07 00:56:17,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:17,098 INFO L225 Difference]: With dead ends: 1219 [2021-11-07 00:56:17,098 INFO L226 Difference]: Without dead ends: 1213 [2021-11-07 00:56:17,098 INFO L786 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 [2021-11-07 00:56:17,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2021-11-07 00:56:17,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 701. [2021-11-07 00:56:17,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 685 states have (on average 1.2671532846715328) internal successors, (868), 700 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:17,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 868 transitions. [2021-11-07 00:56:17,320 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 868 transitions. Word has length 100 [2021-11-07 00:56:17,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:17,321 INFO L470 AbstractCegarLoop]: Abstraction has 701 states and 868 transitions. [2021-11-07 00:56:17,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:17,321 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 868 transitions. [2021-11-07 00:56:17,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-07 00:56:17,322 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:17,323 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:17,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-11-07 00:56:17,323 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:56:17,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:17,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1722148873, now seen corresponding path program 1 times [2021-11-07 00:56:17,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:56:17,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341896712] [2021-11-07 00:56:17,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:17,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:56:17,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:17,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:17,449 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:56:17,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341896712] [2021-11-07 00:56:17,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341896712] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:17,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:17,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 00:56:17,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035746054] [2021-11-07 00:56:17,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:56:17,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:56:17,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:56:17,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:56:17,450 INFO L87 Difference]: Start difference. First operand 701 states and 868 transitions. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:18,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:18,750 INFO L93 Difference]: Finished difference Result 1219 states and 1516 transitions. [2021-11-07 00:56:18,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 00:56:18,750 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-07 00:56:18,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:18,751 INFO L225 Difference]: With dead ends: 1219 [2021-11-07 00:56:18,752 INFO L226 Difference]: Without dead ends: 1213 [2021-11-07 00:56:18,752 INFO L786 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 [2021-11-07 00:56:18,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2021-11-07 00:56:18,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 701. [2021-11-07 00:56:18,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 685 states have (on average 1.2642335766423358) internal successors, (866), 700 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:18,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 866 transitions. [2021-11-07 00:56:18,965 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 866 transitions. Word has length 100 [2021-11-07 00:56:18,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:18,965 INFO L470 AbstractCegarLoop]: Abstraction has 701 states and 866 transitions. [2021-11-07 00:56:18,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:18,966 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 866 transitions. [2021-11-07 00:56:18,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-07 00:56:18,967 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:18,967 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:18,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-11-07 00:56:18,967 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:56:18,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:18,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1565469443, now seen corresponding path program 1 times [2021-11-07 00:56:18,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:56:18,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987562692] [2021-11-07 00:56:18,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:18,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:56:19,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:20,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:20,945 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:56:20,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987562692] [2021-11-07 00:56:20,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987562692] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:20,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:20,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-11-07 00:56:20,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406961302] [2021-11-07 00:56:20,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-07 00:56:20,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:56:20,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-07 00:56:20,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1078, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 00:56:20,947 INFO L87 Difference]: Start difference. First operand 701 states and 866 transitions. Second operand has 35 states, 35 states have (on average 2.8857142857142857) internal successors, (101), 34 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:27,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:27,118 INFO L93 Difference]: Finished difference Result 1053 states and 1322 transitions. [2021-11-07 00:56:27,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-07 00:56:27,118 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.8857142857142857) internal successors, (101), 34 states have internal predecessors, (101), 0 states have call successors, (0), 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 101 [2021-11-07 00:56:27,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:27,119 INFO L225 Difference]: With dead ends: 1053 [2021-11-07 00:56:27,119 INFO L226 Difference]: Without dead ends: 954 [2021-11-07 00:56:27,120 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=580, Invalid=3580, Unknown=0, NotChecked=0, Total=4160 [2021-11-07 00:56:27,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2021-11-07 00:56:27,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 722. [2021-11-07 00:56:27,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 706 states have (on average 1.2648725212464589) internal successors, (893), 721 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:27,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 893 transitions. [2021-11-07 00:56:27,343 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 893 transitions. Word has length 101 [2021-11-07 00:56:27,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:27,343 INFO L470 AbstractCegarLoop]: Abstraction has 722 states and 893 transitions. [2021-11-07 00:56:27,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.8857142857142857) internal successors, (101), 34 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:27,343 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 893 transitions. [2021-11-07 00:56:27,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-07 00:56:27,344 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:27,344 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:27,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-11-07 00:56:27,344 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:56:27,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:27,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1170317597, now seen corresponding path program 1 times [2021-11-07 00:56:27,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:56:27,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023457704] [2021-11-07 00:56:27,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:27,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:56:27,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:27,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:27,647 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:56:27,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023457704] [2021-11-07 00:56:27,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023457704] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:27,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:27,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-07 00:56:27,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306191587] [2021-11-07 00:56:27,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 00:56:27,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:56:27,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 00:56:27,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-07 00:56:27,650 INFO L87 Difference]: Start difference. First operand 722 states and 893 transitions. Second operand has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 11 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:29,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:29,163 INFO L93 Difference]: Finished difference Result 1623 states and 2060 transitions. [2021-11-07 00:56:29,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 00:56:29,164 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 11 states have internal predecessors, (101), 0 states have call successors, (0), 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 101 [2021-11-07 00:56:29,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:29,165 INFO L225 Difference]: With dead ends: 1623 [2021-11-07 00:56:29,165 INFO L226 Difference]: Without dead ends: 1473 [2021-11-07 00:56:29,166 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2021-11-07 00:56:29,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2021-11-07 00:56:29,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 670. [2021-11-07 00:56:29,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 655 states have (on average 1.2610687022900764) internal successors, (826), 669 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:29,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 826 transitions. [2021-11-07 00:56:29,372 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 826 transitions. Word has length 101 [2021-11-07 00:56:29,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:29,372 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 826 transitions. [2021-11-07 00:56:29,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 11 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:29,372 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 826 transitions. [2021-11-07 00:56:29,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-07 00:56:29,373 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:29,373 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:29,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-11-07 00:56:29,374 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:56:29,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:29,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1466719901, now seen corresponding path program 1 times [2021-11-07 00:56:29,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:56:29,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139526129] [2021-11-07 00:56:29,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:29,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:56:29,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:29,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:29,721 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:56:29,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139526129] [2021-11-07 00:56:29,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139526129] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:29,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:29,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-07 00:56:29,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358861483] [2021-11-07 00:56:29,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 00:56:29,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:56:29,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 00:56:29,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-07 00:56:29,723 INFO L87 Difference]: Start difference. First operand 670 states and 826 transitions. Second operand has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:31,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:31,884 INFO L93 Difference]: Finished difference Result 2182 states and 2788 transitions. [2021-11-07 00:56:31,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-07 00:56:31,885 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 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 101 [2021-11-07 00:56:31,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:31,887 INFO L225 Difference]: With dead ends: 2182 [2021-11-07 00:56:31,887 INFO L226 Difference]: Without dead ends: 2011 [2021-11-07 00:56:31,888 INFO L786 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 [2021-11-07 00:56:31,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2011 states. [2021-11-07 00:56:32,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2011 to 597. [2021-11-07 00:56:32,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 585 states have (on average 1.2547008547008547) internal successors, (734), 596 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:32,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 734 transitions. [2021-11-07 00:56:32,138 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 734 transitions. Word has length 101 [2021-11-07 00:56:32,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:32,138 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 734 transitions. [2021-11-07 00:56:32,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:32,139 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 734 transitions. [2021-11-07 00:56:32,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-07 00:56:32,139 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:32,140 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:32,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-11-07 00:56:32,140 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:56:32,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:32,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1364738908, now seen corresponding path program 1 times [2021-11-07 00:56:32,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:56:32,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261340435] [2021-11-07 00:56:32,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:32,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:56:32,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:32,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:32,246 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:56:32,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261340435] [2021-11-07 00:56:32,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261340435] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:32,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:32,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 00:56:32,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661236201] [2021-11-07 00:56:32,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:56:32,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:56:32,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:56:32,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:56:32,248 INFO L87 Difference]: Start difference. First operand 597 states and 734 transitions. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:33,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:33,693 INFO L93 Difference]: Finished difference Result 1316 states and 1657 transitions. [2021-11-07 00:56:33,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 00:56:33,694 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 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 101 [2021-11-07 00:56:33,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:33,695 INFO L225 Difference]: With dead ends: 1316 [2021-11-07 00:56:33,695 INFO L226 Difference]: Without dead ends: 1147 [2021-11-07 00:56:33,699 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-11-07 00:56:33,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-11-07 00:56:33,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 587. [2021-11-07 00:56:33,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 575 states have (on average 1.2556521739130435) internal successors, (722), 586 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:33,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 722 transitions. [2021-11-07 00:56:33,921 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 722 transitions. Word has length 101 [2021-11-07 00:56:33,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:33,921 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 722 transitions. [2021-11-07 00:56:33,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:33,921 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 722 transitions. [2021-11-07 00:56:33,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-07 00:56:33,922 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:33,922 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:33,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-11-07 00:56:33,923 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:56:33,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:33,923 INFO L85 PathProgramCache]: Analyzing trace with hash 330504227, now seen corresponding path program 1 times [2021-11-07 00:56:33,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:56:33,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235282054] [2021-11-07 00:56:33,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:33,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:56:33,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:34,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:34,262 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:56:34,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235282054] [2021-11-07 00:56:34,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235282054] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:34,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:34,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-07 00:56:34,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423535082] [2021-11-07 00:56:34,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 00:56:34,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:56:34,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 00:56:34,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-07 00:56:34,264 INFO L87 Difference]: Start difference. First operand 587 states and 722 transitions. Second operand has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:35,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:35,239 INFO L93 Difference]: Finished difference Result 1035 states and 1303 transitions. [2021-11-07 00:56:35,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 00:56:35,240 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 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 101 [2021-11-07 00:56:35,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:35,241 INFO L225 Difference]: With dead ends: 1035 [2021-11-07 00:56:35,241 INFO L226 Difference]: Without dead ends: 714 [2021-11-07 00:56:35,242 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2021-11-07 00:56:35,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-11-07 00:56:35,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 364. [2021-11-07 00:56:35,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 357 states have (on average 1.2408963585434174) internal successors, (443), 363 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:35,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 443 transitions. [2021-11-07 00:56:35,406 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 443 transitions. Word has length 101 [2021-11-07 00:56:35,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:35,406 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 443 transitions. [2021-11-07 00:56:35,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:35,407 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 443 transitions. [2021-11-07 00:56:35,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-07 00:56:35,407 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:35,407 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:35,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-11-07 00:56:35,408 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:56:35,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:35,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1639927908, now seen corresponding path program 1 times [2021-11-07 00:56:35,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:56:35,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843596394] [2021-11-07 00:56:35,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:35,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:56:35,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:35,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:35,721 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:56:35,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843596394] [2021-11-07 00:56:35,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843596394] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:35,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:35,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-07 00:56:35,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118340699] [2021-11-07 00:56:35,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 00:56:35,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:56:35,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 00:56:35,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-07 00:56:35,723 INFO L87 Difference]: Start difference. First operand 364 states and 443 transitions. Second operand has 12 states, 12 states have (on average 8.5) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:37,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:37,123 INFO L93 Difference]: Finished difference Result 1074 states and 1366 transitions. [2021-11-07 00:56:37,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 00:56:37,123 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.5) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 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 102 [2021-11-07 00:56:37,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:37,124 INFO L225 Difference]: With dead ends: 1074 [2021-11-07 00:56:37,125 INFO L226 Difference]: Without dead ends: 953 [2021-11-07 00:56:37,125 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2021-11-07 00:56:37,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-11-07 00:56:37,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 341. [2021-11-07 00:56:37,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 336 states have (on average 1.2261904761904763) internal successors, (412), 340 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:37,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 412 transitions. [2021-11-07 00:56:37,288 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 412 transitions. Word has length 102 [2021-11-07 00:56:37,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:37,288 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 412 transitions. [2021-11-07 00:56:37,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.5) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:37,288 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 412 transitions. [2021-11-07 00:56:37,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-07 00:56:37,289 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:37,289 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:37,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-11-07 00:56:37,289 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:56:37,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:37,290 INFO L85 PathProgramCache]: Analyzing trace with hash 782557276, now seen corresponding path program 1 times [2021-11-07 00:56:37,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:56:37,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861680084] [2021-11-07 00:56:37,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:37,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:56:37,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:37,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:37,575 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:56:37,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861680084] [2021-11-07 00:56:37,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861680084] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:37,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:37,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-07 00:56:37,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553340789] [2021-11-07 00:56:37,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 00:56:37,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:56:37,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 00:56:37,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-07 00:56:37,576 INFO L87 Difference]: Start difference. First operand 341 states and 412 transitions. Second operand has 12 states, 12 states have (on average 8.5) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:38,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:38,629 INFO L93 Difference]: Finished difference Result 897 states and 1127 transitions. [2021-11-07 00:56:38,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 00:56:38,630 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.5) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 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 102 [2021-11-07 00:56:38,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:38,631 INFO L225 Difference]: With dead ends: 897 [2021-11-07 00:56:38,631 INFO L226 Difference]: Without dead ends: 732 [2021-11-07 00:56:38,631 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2021-11-07 00:56:38,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-11-07 00:56:38,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 261. [2021-11-07 00:56:38,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 259 states have (on average 1.193050193050193) internal successors, (309), 260 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:38,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 309 transitions. [2021-11-07 00:56:38,781 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 309 transitions. Word has length 102 [2021-11-07 00:56:38,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:38,782 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 309 transitions. [2021-11-07 00:56:38,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.5) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:38,782 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 309 transitions. [2021-11-07 00:56:38,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-07 00:56:38,782 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:38,782 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:38,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-11-07 00:56:38,783 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:56:38,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:38,783 INFO L85 PathProgramCache]: Analyzing trace with hash 335461180, now seen corresponding path program 1 times [2021-11-07 00:56:38,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:56:38,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414395704] [2021-11-07 00:56:38,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:38,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:56:38,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:38,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:38,977 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:56:38,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414395704] [2021-11-07 00:56:38,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414395704] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:38,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:38,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-07 00:56:38,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849309141] [2021-11-07 00:56:38,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 00:56:38,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:56:38,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 00:56:38,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-07 00:56:38,979 INFO L87 Difference]: Start difference. First operand 261 states and 309 transitions. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 10 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) [2021-11-07 00:56:41,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:41,263 INFO L93 Difference]: Finished difference Result 1291 states and 1656 transitions. [2021-11-07 00:56:41,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 00:56:41,264 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 10 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 104 [2021-11-07 00:56:41,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:41,265 INFO L225 Difference]: With dead ends: 1291 [2021-11-07 00:56:41,265 INFO L226 Difference]: Without dead ends: 1159 [2021-11-07 00:56:41,266 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2021-11-07 00:56:41,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-11-07 00:56:41,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 271. [2021-11-07 00:56:41,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 269 states have (on average 1.1858736059479553) internal successors, (319), 270 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:41,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 319 transitions. [2021-11-07 00:56:41,420 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 319 transitions. Word has length 104 [2021-11-07 00:56:41,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:41,420 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 319 transitions. [2021-11-07 00:56:41,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 10 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) [2021-11-07 00:56:41,420 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 319 transitions. [2021-11-07 00:56:41,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-07 00:56:41,421 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:41,421 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:41,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-11-07 00:56:41,421 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:56:41,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:41,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1644170665, now seen corresponding path program 1 times [2021-11-07 00:56:41,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:56:41,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121724102] [2021-11-07 00:56:41,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:41,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:56:41,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:41,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:41,527 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:56:41,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121724102] [2021-11-07 00:56:41,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121724102] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:41,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:41,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 00:56:41,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071851989] [2021-11-07 00:56:41,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:56:41,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:56:41,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:56:41,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:56:41,530 INFO L87 Difference]: Start difference. First operand 271 states and 319 transitions. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 7 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) [2021-11-07 00:56:42,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:42,224 INFO L93 Difference]: Finished difference Result 545 states and 669 transitions. [2021-11-07 00:56:42,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 00:56:42,224 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 7 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 105 [2021-11-07 00:56:42,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:42,225 INFO L225 Difference]: With dead ends: 545 [2021-11-07 00:56:42,225 INFO L226 Difference]: Without dead ends: 413 [2021-11-07 00:56:42,225 INFO L786 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 [2021-11-07 00:56:42,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-11-07 00:56:42,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 261. [2021-11-07 00:56:42,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 259 states have (on average 1.1853281853281854) internal successors, (307), 260 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:42,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 307 transitions. [2021-11-07 00:56:42,375 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 307 transitions. Word has length 105 [2021-11-07 00:56:42,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:42,376 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 307 transitions. [2021-11-07 00:56:42,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 7 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) [2021-11-07 00:56:42,376 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 307 transitions. [2021-11-07 00:56:42,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-07 00:56:42,376 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:42,376 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:42,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-11-07 00:56:42,376 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:56:42,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:42,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1176555649, now seen corresponding path program 1 times [2021-11-07 00:56:42,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:56:42,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69031844] [2021-11-07 00:56:42,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:42,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:56:42,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:44,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:44,067 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:56:44,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69031844] [2021-11-07 00:56:44,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69031844] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:44,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:44,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-11-07 00:56:44,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843252910] [2021-11-07 00:56:44,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-07 00:56:44,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:56:44,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-07 00:56:44,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=978, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 00:56:44,069 INFO L87 Difference]: Start difference. First operand 261 states and 307 transitions. Second operand has 33 states, 33 states have (on average 3.212121212121212) internal successors, (106), 32 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:48,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:48,395 INFO L93 Difference]: Finished difference Result 519 states and 634 transitions. [2021-11-07 00:56:48,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-07 00:56:48,396 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.212121212121212) internal successors, (106), 32 states have internal predecessors, (106), 0 states have call successors, (0), 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 106 [2021-11-07 00:56:48,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:48,397 INFO L225 Difference]: With dead ends: 519 [2021-11-07 00:56:48,397 INFO L226 Difference]: Without dead ends: 513 [2021-11-07 00:56:48,397 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=481, Invalid=3179, Unknown=0, NotChecked=0, Total=3660 [2021-11-07 00:56:48,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-11-07 00:56:48,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 286. [2021-11-07 00:56:48,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 284 states have (on average 1.1866197183098592) internal successors, (337), 285 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:48,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 337 transitions. [2021-11-07 00:56:48,556 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 337 transitions. Word has length 106 [2021-11-07 00:56:48,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:48,556 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 337 transitions. [2021-11-07 00:56:48,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.212121212121212) internal successors, (106), 32 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:48,556 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 337 transitions. [2021-11-07 00:56:48,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-07 00:56:48,557 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:48,557 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:48,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-11-07 00:56:48,557 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:56:48,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:48,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1589162411, now seen corresponding path program 1 times [2021-11-07 00:56:48,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:56:48,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565619175] [2021-11-07 00:56:48,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:48,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:56:48,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:48,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:48,873 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:56:48,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565619175] [2021-11-07 00:56:48,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565619175] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:48,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:48,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-07 00:56:48,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708012278] [2021-11-07 00:56:48,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 00:56:48,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:56:48,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 00:56:48,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-07 00:56:48,874 INFO L87 Difference]: Start difference. First operand 286 states and 337 transitions. Second operand has 12 states, 12 states have (on average 8.916666666666666) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:49,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:49,969 INFO L93 Difference]: Finished difference Result 642 states and 795 transitions. [2021-11-07 00:56:49,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 00:56:49,970 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.916666666666666) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 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 107 [2021-11-07 00:56:49,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:49,970 INFO L225 Difference]: With dead ends: 642 [2021-11-07 00:56:49,971 INFO L226 Difference]: Without dead ends: 636 [2021-11-07 00:56:49,971 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2021-11-07 00:56:49,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-11-07 00:56:50,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 255. [2021-11-07 00:56:50,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.1811023622047243) internal successors, (300), 254 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:50,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 300 transitions. [2021-11-07 00:56:50,127 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 300 transitions. Word has length 107 [2021-11-07 00:56:50,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:50,127 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 300 transitions. [2021-11-07 00:56:50,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.916666666666666) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:50,127 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 300 transitions. [2021-11-07 00:56:50,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-07 00:56:50,128 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:50,128 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:50,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-11-07 00:56:50,128 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:56:50,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:50,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1153033671, now seen corresponding path program 1 times [2021-11-07 00:56:50,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:56:50,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856288637] [2021-11-07 00:56:50,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:50,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:56:50,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:50,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:50,198 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:56:50,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856288637] [2021-11-07 00:56:50,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856288637] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:50,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:50,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 00:56:50,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926214786] [2021-11-07 00:56:50,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:56:50,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:56:50,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:56:50,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:56:50,201 INFO L87 Difference]: Start difference. First operand 255 states and 300 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:50,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:50,457 INFO L93 Difference]: Finished difference Result 362 states and 441 transitions. [2021-11-07 00:56:50,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:56:50,458 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 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 127 [2021-11-07 00:56:50,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:50,458 INFO L225 Difference]: With dead ends: 362 [2021-11-07 00:56:50,458 INFO L226 Difference]: Without dead ends: 312 [2021-11-07 00:56:50,459 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:56:50,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-11-07 00:56:50,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 302. [2021-11-07 00:56:50,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 1.1993355481727574) internal successors, (361), 301 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:50,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 361 transitions. [2021-11-07 00:56:50,715 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 361 transitions. Word has length 127 [2021-11-07 00:56:50,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:50,715 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 361 transitions. [2021-11-07 00:56:50,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:50,716 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 361 transitions. [2021-11-07 00:56:50,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-07 00:56:50,716 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:50,716 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:50,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-11-07 00:56:50,716 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:56:50,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:50,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1373736746, now seen corresponding path program 1 times [2021-11-07 00:56:50,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:56:50,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069484860] [2021-11-07 00:56:50,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:50,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:56:50,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:50,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:50,782 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:56:50,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069484860] [2021-11-07 00:56:50,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069484860] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:50,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:50,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 00:56:50,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516928008] [2021-11-07 00:56:50,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:56:50,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:56:50,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:56:50,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:56:50,785 INFO L87 Difference]: Start difference. First operand 302 states and 361 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:51,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:51,194 INFO L93 Difference]: Finished difference Result 586 states and 737 transitions. [2021-11-07 00:56:51,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:56:51,194 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 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 130 [2021-11-07 00:56:51,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:51,195 INFO L225 Difference]: With dead ends: 586 [2021-11-07 00:56:51,195 INFO L226 Difference]: Without dead ends: 444 [2021-11-07 00:56:51,196 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:56:51,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-11-07 00:56:51,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 430. [2021-11-07 00:56:51,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 1.2354312354312353) internal successors, (530), 429 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:51,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 530 transitions. [2021-11-07 00:56:51,594 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 530 transitions. Word has length 130 [2021-11-07 00:56:51,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:51,594 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 530 transitions. [2021-11-07 00:56:51,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:51,595 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 530 transitions. [2021-11-07 00:56:51,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-07 00:56:51,595 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:51,595 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:51,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-11-07 00:56:51,596 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:56:51,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:51,596 INFO L85 PathProgramCache]: Analyzing trace with hash -775371346, now seen corresponding path program 1 times [2021-11-07 00:56:51,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:56:51,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959991317] [2021-11-07 00:56:51,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:51,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:56:51,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:51,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:51,669 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:56:51,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959991317] [2021-11-07 00:56:51,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959991317] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:51,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:51,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 00:56:51,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545321240] [2021-11-07 00:56:51,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:56:51,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:56:51,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:56:51,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:56:51,671 INFO L87 Difference]: Start difference. First operand 430 states and 530 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:52,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:52,465 INFO L93 Difference]: Finished difference Result 970 states and 1244 transitions. [2021-11-07 00:56:52,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:56:52,466 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 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 133 [2021-11-07 00:56:52,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:52,467 INFO L225 Difference]: With dead ends: 970 [2021-11-07 00:56:52,467 INFO L226 Difference]: Without dead ends: 700 [2021-11-07 00:56:52,467 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:56:52,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2021-11-07 00:56:53,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 674. [2021-11-07 00:56:53,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 673 states have (on average 1.263001485884101) internal successors, (850), 673 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:53,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 850 transitions. [2021-11-07 00:56:53,172 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 850 transitions. Word has length 133 [2021-11-07 00:56:53,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:53,172 INFO L470 AbstractCegarLoop]: Abstraction has 674 states and 850 transitions. [2021-11-07 00:56:53,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:53,173 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 850 transitions. [2021-11-07 00:56:53,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-07 00:56:53,173 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:53,173 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:53,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-11-07 00:56:53,174 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:56:53,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:53,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1668847705, now seen corresponding path program 1 times [2021-11-07 00:56:53,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:56:53,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588915916] [2021-11-07 00:56:53,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:53,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:56:53,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:53,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:53,238 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:56:53,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588915916] [2021-11-07 00:56:53,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588915916] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:53,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:53,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 00:56:53,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785923863] [2021-11-07 00:56:53,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:56:53,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:56:53,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:56:53,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:56:53,240 INFO L87 Difference]: Start difference. First operand 674 states and 850 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:54,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:54,714 INFO L93 Difference]: Finished difference Result 1702 states and 2204 transitions. [2021-11-07 00:56:54,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:56:54,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 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 136 [2021-11-07 00:56:54,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:54,716 INFO L225 Difference]: With dead ends: 1702 [2021-11-07 00:56:54,716 INFO L226 Difference]: Without dead ends: 1188 [2021-11-07 00:56:54,717 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:56:54,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2021-11-07 00:56:56,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 1138. [2021-11-07 00:56:56,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 1137 states have (on average 1.2788038698328936) internal successors, (1454), 1137 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:56,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1454 transitions. [2021-11-07 00:56:56,092 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1454 transitions. Word has length 136 [2021-11-07 00:56:56,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:56,092 INFO L470 AbstractCegarLoop]: Abstraction has 1138 states and 1454 transitions. [2021-11-07 00:56:56,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:56,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1454 transitions. [2021-11-07 00:56:56,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-07 00:56:56,093 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:56,094 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:56,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-11-07 00:56:56,094 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:56:56,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:56,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1231470253, now seen corresponding path program 1 times [2021-11-07 00:56:56,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:56:56,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109511603] [2021-11-07 00:56:56,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:56,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:56:56,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:56,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:56,171 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:56:56,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109511603] [2021-11-07 00:56:56,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109511603] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:56,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:56,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 00:56:56,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485127875] [2021-11-07 00:56:56,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:56:56,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:56:56,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:56:56,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:56:56,173 INFO L87 Difference]: Start difference. First operand 1138 states and 1454 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:59,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:59,051 INFO L93 Difference]: Finished difference Result 3094 states and 4016 transitions. [2021-11-07 00:56:59,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:56:59,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 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 139 [2021-11-07 00:56:59,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:59,054 INFO L225 Difference]: With dead ends: 3094 [2021-11-07 00:56:59,054 INFO L226 Difference]: Without dead ends: 2116 [2021-11-07 00:56:59,055 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:56:59,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2116 states. [2021-11-07 00:57:01,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2116 to 2018. [2021-11-07 00:57:01,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 2017 states have (on average 1.2840852751611305) internal successors, (2590), 2017 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:01,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 2590 transitions. [2021-11-07 00:57:01,581 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 2590 transitions. Word has length 139 [2021-11-07 00:57:01,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:57:01,581 INFO L470 AbstractCegarLoop]: Abstraction has 2018 states and 2590 transitions. [2021-11-07 00:57:01,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:01,582 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 2590 transitions. [2021-11-07 00:57:01,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-07 00:57:01,583 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:01,583 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:57:01,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-11-07 00:57:01,583 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:57:01,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:01,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1646739651, now seen corresponding path program 1 times [2021-11-07 00:57:01,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:57:01,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003344113] [2021-11-07 00:57:01,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:01,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:57:01,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:01,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:57:01,654 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:57:01,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003344113] [2021-11-07 00:57:01,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003344113] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:57:01,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:57:01,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 00:57:01,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505497563] [2021-11-07 00:57:01,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:57:01,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:57:01,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:57:01,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:57:01,656 INFO L87 Difference]: Start difference. First operand 2018 states and 2590 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:06,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:57:06,929 INFO L93 Difference]: Finished difference Result 5734 states and 7424 transitions. [2021-11-07 00:57:06,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:57:06,929 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 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 142 [2021-11-07 00:57:06,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:57:06,933 INFO L225 Difference]: With dead ends: 5734 [2021-11-07 00:57:06,933 INFO L226 Difference]: Without dead ends: 3876 [2021-11-07 00:57:06,935 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:57:06,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3876 states. [2021-11-07 00:57:12,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3876 to 3682. [2021-11-07 00:57:12,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3682 states, 3681 states have (on average 1.2817169247487097) internal successors, (4718), 3681 states have internal predecessors, (4718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:12,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3682 states to 3682 states and 4718 transitions. [2021-11-07 00:57:12,023 INFO L78 Accepts]: Start accepts. Automaton has 3682 states and 4718 transitions. Word has length 142 [2021-11-07 00:57:12,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:57:12,023 INFO L470 AbstractCegarLoop]: Abstraction has 3682 states and 4718 transitions. [2021-11-07 00:57:12,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:12,023 INFO L276 IsEmpty]: Start isEmpty. Operand 3682 states and 4718 transitions. [2021-11-07 00:57:12,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-07 00:57:12,024 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:12,024 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:57:12,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-11-07 00:57:12,025 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:57:12,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:12,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1300427539, now seen corresponding path program 1 times [2021-11-07 00:57:12,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:57:12,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957575749] [2021-11-07 00:57:12,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:12,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:57:12,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:12,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:57:12,133 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:57:12,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957575749] [2021-11-07 00:57:12,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957575749] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:57:12,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:57:12,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-07 00:57:12,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138493533] [2021-11-07 00:57:12,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:57:12,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:57:12,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:57:12,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:57:12,135 INFO L87 Difference]: Start difference. First operand 3682 states and 4718 transitions. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:28,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:57:28,180 INFO L93 Difference]: Finished difference Result 14959 states and 19319 transitions. [2021-11-07 00:57:28,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 00:57:28,181 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 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 145 [2021-11-07 00:57:28,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:57:28,193 INFO L225 Difference]: With dead ends: 14959 [2021-11-07 00:57:28,193 INFO L226 Difference]: Without dead ends: 11437 [2021-11-07 00:57:28,198 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-11-07 00:57:28,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11437 states. [2021-11-07 00:57:35,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11437 to 5214. [2021-11-07 00:57:35,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5214 states, 5213 states have (on average 1.2725877613658163) internal successors, (6634), 5213 states have internal predecessors, (6634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:35,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5214 states to 5214 states and 6634 transitions. [2021-11-07 00:57:35,683 INFO L78 Accepts]: Start accepts. Automaton has 5214 states and 6634 transitions. Word has length 145 [2021-11-07 00:57:35,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:57:35,684 INFO L470 AbstractCegarLoop]: Abstraction has 5214 states and 6634 transitions. [2021-11-07 00:57:35,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:35,684 INFO L276 IsEmpty]: Start isEmpty. Operand 5214 states and 6634 transitions. [2021-11-07 00:57:35,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-07 00:57:35,685 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:35,685 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:57:35,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-11-07 00:57:35,686 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:57:35,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:35,686 INFO L85 PathProgramCache]: Analyzing trace with hash -217516198, now seen corresponding path program 1 times [2021-11-07 00:57:35,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:57:35,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377170086] [2021-11-07 00:57:35,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:35,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:57:35,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:35,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:57:35,758 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:57:35,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377170086] [2021-11-07 00:57:35,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377170086] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:57:35,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:57:35,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 00:57:35,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264953746] [2021-11-07 00:57:35,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:57:35,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:57:35,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:57:35,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:57:35,761 INFO L87 Difference]: Start difference. First operand 5214 states and 6634 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:44,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:57:44,804 INFO L93 Difference]: Finished difference Result 11614 states and 14824 transitions. [2021-11-07 00:57:44,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:57:44,805 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 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 147 [2021-11-07 00:57:44,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:57:44,811 INFO L225 Difference]: With dead ends: 11614 [2021-11-07 00:57:44,811 INFO L226 Difference]: Without dead ends: 6560 [2021-11-07 00:57:44,815 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:57:44,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6560 states. [2021-11-07 00:57:53,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6560 to 6558. [2021-11-07 00:57:53,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6558 states, 6557 states have (on average 1.2652127497331096) internal successors, (8296), 6557 states have internal predecessors, (8296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:53,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6558 states to 6558 states and 8296 transitions. [2021-11-07 00:57:53,787 INFO L78 Accepts]: Start accepts. Automaton has 6558 states and 8296 transitions. Word has length 147 [2021-11-07 00:57:53,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:57:53,788 INFO L470 AbstractCegarLoop]: Abstraction has 6558 states and 8296 transitions. [2021-11-07 00:57:53,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:53,788 INFO L276 IsEmpty]: Start isEmpty. Operand 6558 states and 8296 transitions. [2021-11-07 00:57:53,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-07 00:57:53,789 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:53,790 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:57:53,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-11-07 00:57:53,790 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:57:53,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:53,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1640279179, now seen corresponding path program 1 times [2021-11-07 00:57:53,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:57:53,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417061942] [2021-11-07 00:57:53,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:53,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:57:53,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:53,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:57:53,868 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:57:53,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417061942] [2021-11-07 00:57:53,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417061942] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:57:53,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:57:53,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 00:57:53,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642315291] [2021-11-07 00:57:53,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:57:53,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:57:53,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:57:53,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:57:53,870 INFO L87 Difference]: Start difference. First operand 6558 states and 8296 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:02,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:02,782 INFO L93 Difference]: Finished difference Result 12958 states and 16420 transitions. [2021-11-07 00:58:02,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:58:02,783 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 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 147 [2021-11-07 00:58:02,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:02,790 INFO L225 Difference]: With dead ends: 12958 [2021-11-07 00:58:02,790 INFO L226 Difference]: Without dead ends: 6560 [2021-11-07 00:58:02,795 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:58:02,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6560 states. [2021-11-07 00:58:11,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6560 to 6558. [2021-11-07 00:58:11,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6558 states, 6557 states have (on average 1.2649077321946012) internal successors, (8294), 6557 states have internal predecessors, (8294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:11,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6558 states to 6558 states and 8294 transitions. [2021-11-07 00:58:11,749 INFO L78 Accepts]: Start accepts. Automaton has 6558 states and 8294 transitions. Word has length 147 [2021-11-07 00:58:11,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:11,750 INFO L470 AbstractCegarLoop]: Abstraction has 6558 states and 8294 transitions. [2021-11-07 00:58:11,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:11,750 INFO L276 IsEmpty]: Start isEmpty. Operand 6558 states and 8294 transitions. [2021-11-07 00:58:11,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-07 00:58:11,750 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:11,751 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:58:11,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-11-07 00:58:11,751 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:58:11,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:11,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1361087265, now seen corresponding path program 1 times [2021-11-07 00:58:11,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:58:11,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928454093] [2021-11-07 00:58:11,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:11,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:58:11,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:11,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:11,861 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:58:11,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928454093] [2021-11-07 00:58:11,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928454093] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:11,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:11,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 00:58:11,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420529870] [2021-11-07 00:58:11,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 00:58:11,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:58:11,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 00:58:11,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 00:58:11,864 INFO L87 Difference]: Start difference. First operand 6558 states and 8294 transitions. Second operand has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:25,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:25,158 INFO L93 Difference]: Finished difference Result 9209 states and 11532 transitions. [2021-11-07 00:58:25,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 00:58:25,158 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 0 states have call successors, (0), 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 148 [2021-11-07 00:58:25,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:25,169 INFO L225 Difference]: With dead ends: 9209 [2021-11-07 00:58:25,169 INFO L226 Difference]: Without dead ends: 9207 [2021-11-07 00:58:25,171 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-11-07 00:58:25,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9207 states. [2021-11-07 00:58:34,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9207 to 6558. [2021-11-07 00:58:34,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6558 states, 6557 states have (on average 1.2502668903461949) internal successors, (8198), 6557 states have internal predecessors, (8198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:34,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6558 states to 6558 states and 8198 transitions. [2021-11-07 00:58:34,069 INFO L78 Accepts]: Start accepts. Automaton has 6558 states and 8198 transitions. Word has length 148 [2021-11-07 00:58:34,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:34,069 INFO L470 AbstractCegarLoop]: Abstraction has 6558 states and 8198 transitions. [2021-11-07 00:58:34,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:34,069 INFO L276 IsEmpty]: Start isEmpty. Operand 6558 states and 8198 transitions. [2021-11-07 00:58:34,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-07 00:58:34,070 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:34,071 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:58:34,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-11-07 00:58:34,071 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:58:34,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:34,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1854280184, now seen corresponding path program 1 times [2021-11-07 00:58:34,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:58:34,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376594148] [2021-11-07 00:58:34,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:34,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:58:34,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:34,660 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 00:58:34,660 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:58:34,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376594148] [2021-11-07 00:58:34,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376594148] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:34,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:34,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-07 00:58:34,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133490842] [2021-11-07 00:58:34,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 00:58:34,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:58:34,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 00:58:34,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-11-07 00:58:34,662 INFO L87 Difference]: Start difference. First operand 6558 states and 8198 transitions. Second operand has 21 states, 21 states have (on average 7.476190476190476) internal successors, (157), 20 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:21,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:21,984 INFO L93 Difference]: Finished difference Result 35386 states and 44274 transitions. [2021-11-07 00:59:21,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-11-07 00:59:21,989 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 7.476190476190476) internal successors, (157), 20 states have internal predecessors, (157), 0 states have call successors, (0), 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 169 [2021-11-07 00:59:21,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:22,023 INFO L225 Difference]: With dead ends: 35386 [2021-11-07 00:59:22,023 INFO L226 Difference]: Without dead ends: 28971 [2021-11-07 00:59:22,035 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3061 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1548, Invalid=7958, Unknown=0, NotChecked=0, Total=9506 [2021-11-07 00:59:22,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28971 states. [2021-11-07 00:59:32,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28971 to 6592. [2021-11-07 00:59:32,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6592 states, 6591 states have (on average 1.2495827643756638) internal successors, (8236), 6591 states have internal predecessors, (8236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:32,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6592 states to 6592 states and 8236 transitions. [2021-11-07 00:59:32,156 INFO L78 Accepts]: Start accepts. Automaton has 6592 states and 8236 transitions. Word has length 169 [2021-11-07 00:59:32,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:32,156 INFO L470 AbstractCegarLoop]: Abstraction has 6592 states and 8236 transitions. [2021-11-07 00:59:32,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.476190476190476) internal successors, (157), 20 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:32,156 INFO L276 IsEmpty]: Start isEmpty. Operand 6592 states and 8236 transitions. [2021-11-07 00:59:32,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-07 00:59:32,158 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:32,159 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:32,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-11-07 00:59:32,159 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:59:32,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:32,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1621052530, now seen corresponding path program 1 times [2021-11-07 00:59:32,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:59:32,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058151337] [2021-11-07 00:59:32,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:32,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:59:32,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:32,329 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 00:59:32,329 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:59:32,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058151337] [2021-11-07 00:59:32,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058151337] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:32,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:32,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 00:59:32,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046125866] [2021-11-07 00:59:32,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:59:32,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:59:32,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:59:32,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:59:32,332 INFO L87 Difference]: Start difference. First operand 6592 states and 8236 transitions. Second operand has 8 states, 8 states have (on average 19.75) internal successors, (158), 7 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:49,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:49,062 INFO L93 Difference]: Finished difference Result 16577 states and 20744 transitions. [2021-11-07 00:59:49,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 00:59:49,063 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.75) internal successors, (158), 7 states have internal predecessors, (158), 0 states have call successors, (0), 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 170 [2021-11-07 00:59:49,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:49,076 INFO L225 Difference]: With dead ends: 16577 [2021-11-07 00:59:49,076 INFO L226 Difference]: Without dead ends: 10162 [2021-11-07 00:59:49,082 INFO L786 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 [2021-11-07 00:59:49,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10162 states. [2021-11-07 00:59:58,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10162 to 6558. [2021-11-07 00:59:58,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6558 states, 6557 states have (on average 1.2499618728076864) internal successors, (8196), 6557 states have internal predecessors, (8196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:58,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6558 states to 6558 states and 8196 transitions. [2021-11-07 00:59:58,933 INFO L78 Accepts]: Start accepts. Automaton has 6558 states and 8196 transitions. Word has length 170 [2021-11-07 00:59:58,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:58,934 INFO L470 AbstractCegarLoop]: Abstraction has 6558 states and 8196 transitions. [2021-11-07 00:59:58,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.75) internal successors, (158), 7 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:58,934 INFO L276 IsEmpty]: Start isEmpty. Operand 6558 states and 8196 transitions. [2021-11-07 00:59:58,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-07 00:59:58,935 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:58,935 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:58,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-11-07 00:59:58,936 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 00:59:58,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:58,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1251801165, now seen corresponding path program 1 times [2021-11-07 00:59:58,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:59:58,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384524580] [2021-11-07 00:59:58,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:58,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:59:59,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:00:00,073 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 01:00:00,074 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:00:00,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384524580] [2021-11-07 01:00:00,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384524580] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:00:00,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:00:00,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-11-07 01:00:00,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536417023] [2021-11-07 01:00:00,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-07 01:00:00,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:00:00,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-07 01:00:00,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2021-11-07 01:00:00,075 INFO L87 Difference]: Start difference. First operand 6558 states and 8196 transitions. Second operand has 32 states, 32 states have (on average 4.96875) internal successors, (159), 31 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:21,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:00:21,479 INFO L93 Difference]: Finished difference Result 19420 states and 24314 transitions. [2021-11-07 01:00:21,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-07 01:00:21,480 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.96875) internal successors, (159), 31 states have internal predecessors, (159), 0 states have call successors, (0), 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 171 [2021-11-07 01:00:21,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:00:21,495 INFO L225 Difference]: With dead ends: 19420 [2021-11-07 01:00:21,495 INFO L226 Difference]: Without dead ends: 13011 [2021-11-07 01:00:21,502 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=478, Invalid=2828, Unknown=0, NotChecked=0, Total=3306 [2021-11-07 01:00:21,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13011 states. [2021-11-07 01:00:31,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13011 to 6582. [2021-11-07 01:00:31,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6582 states, 6581 states have (on average 1.249506154079927) internal successors, (8223), 6581 states have internal predecessors, (8223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:31,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6582 states to 6582 states and 8223 transitions. [2021-11-07 01:00:31,517 INFO L78 Accepts]: Start accepts. Automaton has 6582 states and 8223 transitions. Word has length 171 [2021-11-07 01:00:31,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:00:31,517 INFO L470 AbstractCegarLoop]: Abstraction has 6582 states and 8223 transitions. [2021-11-07 01:00:31,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.96875) internal successors, (159), 31 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:31,517 INFO L276 IsEmpty]: Start isEmpty. Operand 6582 states and 8223 transitions. [2021-11-07 01:00:31,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-07 01:00:31,519 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:00:31,519 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:00:31,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-11-07 01:00:31,519 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-07 01:00:31,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:00:31,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1792613720, now seen corresponding path program 1 times [2021-11-07 01:00:31,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:00:31,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833887859] [2021-11-07 01:00:31,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:00:31,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:00:31,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:00:37,936 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:00:37,937 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:00:37,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833887859] [2021-11-07 01:00:37,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833887859] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:00:37,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570499335] [2021-11-07 01:00:37,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:00:37,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:00:37,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:00:37,940 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:00:37,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d145a7-5207-4a97-95d6-38108b548390/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 01:00:38,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:00:38,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 1340 conjuncts, 106 conjunts are in the unsatisfiable core [2021-11-07 01:00:38,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:01:34,184 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-11-07 01:01:55,814 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:01:55,814 INFO L328 TraceCheckSpWp]: Computing backward predicates...