./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/parallel-ticket-4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7c4b2b-631d-432f-9931-518d2caba58a/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7c4b2b-631d-432f-9931-518d2caba58a/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7c4b2b-631d-432f-9931-518d2caba58a/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7c4b2b-631d-432f-9931-518d2caba58a/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/parallel-ticket-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7c4b2b-631d-432f-9931-518d2caba58a/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7c4b2b-631d-432f-9931-518d2caba58a/bin/utaipan-mTDlp9Zugs --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 3546f53c7569eee91b8cae6c9acc440723ca6371 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................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Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 03:09:16,454 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 03:09:16,456 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 03:09:16,520 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 03:09:16,521 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 03:09:16,527 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 03:09:16,530 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 03:09:16,535 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 03:09:16,538 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 03:09:16,548 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 03:09:16,549 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 03:09:16,552 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 03:09:16,553 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 03:09:16,557 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 03:09:16,560 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 03:09:16,571 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 03:09:16,573 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 03:09:16,574 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 03:09:16,577 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 03:09:16,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 03:09:16,590 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 03:09:16,592 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 03:09:16,596 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 03:09:16,598 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 03:09:16,611 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 03:09:16,612 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 03:09:16,612 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 03:09:16,615 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 03:09:16,616 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 03:09:16,618 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 03:09:16,619 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 03:09:16,620 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 03:09:16,623 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 03:09:16,625 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 03:09:16,627 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 03:09:16,628 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 03:09:16,629 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 03:09:16,629 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 03:09:16,630 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 03:09:16,631 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 03:09:16,632 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 03:09:16,633 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7c4b2b-631d-432f-9931-518d2caba58a/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 03:09:16,698 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 03:09:16,699 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 03:09:16,701 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 03:09:16,701 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 03:09:16,701 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 03:09:16,702 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 03:09:16,702 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 03:09:16,702 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 03:09:16,703 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 03:09:16,703 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 03:09:16,704 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 03:09:16,705 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 03:09:16,705 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 03:09:16,706 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 03:09:16,706 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 03:09:16,707 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 03:09:16,708 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 03:09:16,708 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 03:09:16,708 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 03:09:16,709 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 03:09:16,709 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 03:09:16,709 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 03:09:16,710 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 03:09:16,710 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 03:09:16,710 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 03:09:16,710 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 03:09:16,711 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 03:09:16,711 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 03:09:16,712 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 03:09:16,714 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 03:09:16,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:09:16,715 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 03:09:16,715 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 03:09:16,716 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 03:09:16,716 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 03:09:16,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 03:09:16,717 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 03:09:16,717 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 03:09:16,717 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 03:09:16,718 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_fb7c4b2b-631d-432f-9931-518d2caba58a/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7c4b2b-631d-432f-9931-518d2caba58a/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3546f53c7569eee91b8cae6c9acc440723ca6371 [2021-10-16 03:09:17,071 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 03:09:17,105 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 03:09:17,108 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 03:09:17,110 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 03:09:17,111 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 03:09:17,113 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7c4b2b-631d-432f-9931-518d2caba58a/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/weaver/parallel-ticket-4.wvr.c [2021-10-16 03:09:17,217 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7c4b2b-631d-432f-9931-518d2caba58a/bin/utaipan-mTDlp9Zugs/data/32ceca546/4bc1dc0f177544edb418536a67457645/FLAG5041b1a51 [2021-10-16 03:09:17,811 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 03:09:17,812 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7c4b2b-631d-432f-9931-518d2caba58a/sv-benchmarks/c/weaver/parallel-ticket-4.wvr.c [2021-10-16 03:09:17,823 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7c4b2b-631d-432f-9931-518d2caba58a/bin/utaipan-mTDlp9Zugs/data/32ceca546/4bc1dc0f177544edb418536a67457645/FLAG5041b1a51 [2021-10-16 03:09:18,128 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7c4b2b-631d-432f-9931-518d2caba58a/bin/utaipan-mTDlp9Zugs/data/32ceca546/4bc1dc0f177544edb418536a67457645 [2021-10-16 03:09:18,131 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 03:09:18,133 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 03:09:18,135 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 03:09:18,135 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 03:09:18,143 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 03:09:18,144 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:09:18" (1/1) ... [2021-10-16 03:09:18,147 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c88b928 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:18, skipping insertion in model container [2021-10-16 03:09:18,148 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:09:18" (1/1) ... [2021-10-16 03:09:18,157 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 03:09:18,197 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 03:09:18,429 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_fb7c4b2b-631d-432f-9931-518d2caba58a/sv-benchmarks/c/weaver/parallel-ticket-4.wvr.c[2798,2811] [2021-10-16 03:09:18,433 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:09:18,443 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 03:09:18,475 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_fb7c4b2b-631d-432f-9931-518d2caba58a/sv-benchmarks/c/weaver/parallel-ticket-4.wvr.c[2798,2811] [2021-10-16 03:09:18,477 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:09:18,496 INFO L208 MainTranslator]: Completed translation [2021-10-16 03:09:18,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:18 WrapperNode [2021-10-16 03:09:18,497 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 03:09:18,499 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 03:09:18,499 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 03:09:18,499 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 03:09:18,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:18" (1/1) ... [2021-10-16 03:09:18,520 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:18" (1/1) ... [2021-10-16 03:09:18,559 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 03:09:18,560 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 03:09:18,561 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 03:09:18,561 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 03:09:18,577 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:18" (1/1) ... [2021-10-16 03:09:18,578 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:18" (1/1) ... [2021-10-16 03:09:18,582 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:18" (1/1) ... [2021-10-16 03:09:18,583 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:18" (1/1) ... [2021-10-16 03:09:18,592 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:18" (1/1) ... [2021-10-16 03:09:18,595 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:18" (1/1) ... [2021-10-16 03:09:18,609 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:18" (1/1) ... [2021-10-16 03:09:18,613 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 03:09:18,614 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 03:09:18,614 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 03:09:18,615 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 03:09:18,616 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:18" (1/1) ... [2021-10-16 03:09:18,630 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:09:18,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7c4b2b-631d-432f-9931-518d2caba58a/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:09:18,655 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7c4b2b-631d-432f-9931-518d2caba58a/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 03:09:18,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7c4b2b-631d-432f-9931-518d2caba58a/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 03:09:18,712 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-16 03:09:18,712 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-16 03:09:18,712 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-16 03:09:18,713 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-16 03:09:18,713 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-16 03:09:18,713 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-16 03:09:18,713 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-10-16 03:09:18,713 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-10-16 03:09:18,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 03:09:18,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 03:09:18,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-16 03:09:18,714 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-16 03:09:18,714 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-16 03:09:18,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 03:09:18,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 03:09:18,715 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-16 03:09:18,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 03:09:18,717 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-16 03:09:19,313 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 03:09:19,313 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2021-10-16 03:09:19,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:09:19 BoogieIcfgContainer [2021-10-16 03:09:19,317 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 03:09:19,327 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 03:09:19,327 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 03:09:19,342 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 03:09:19,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 03:09:18" (1/3) ... [2021-10-16 03:09:19,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@341573b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:09:19, skipping insertion in model container [2021-10-16 03:09:19,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:18" (2/3) ... [2021-10-16 03:09:19,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@341573b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:09:19, skipping insertion in model container [2021-10-16 03:09:19,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:09:19" (3/3) ... [2021-10-16 03:09:19,346 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-ticket-4.wvr.c [2021-10-16 03:09:19,353 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-16 03:09:19,353 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 03:09:19,354 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 03:09:19,354 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-16 03:09:19,481 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,482 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,482 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,483 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,483 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,483 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,484 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,484 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,484 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,485 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,485 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,485 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,486 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,486 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,486 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,486 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,487 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,487 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,487 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,488 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,488 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,488 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,488 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,489 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,489 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,490 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,490 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,490 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,490 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,491 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,491 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,491 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,491 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,492 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,492 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,492 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,493 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,493 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,493 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,494 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,494 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,494 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,494 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,495 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,495 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,495 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,495 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,496 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,496 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,497 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,497 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,497 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,498 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,498 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,498 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,498 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,498 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,500 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,501 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,501 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,502 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,502 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,502 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,503 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,504 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,504 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,505 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,505 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,507 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,507 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,508 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,508 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,509 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,509 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,509 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,511 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,512 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,516 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,517 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,517 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,518 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,518 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,519 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,521 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,521 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,522 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,531 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,531 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,531 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,532 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,532 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,532 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,533 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,533 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,533 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,533 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,541 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,545 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,545 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,546 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,546 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,546 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,552 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,552 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,552 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,553 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,553 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,553 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,560 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,561 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,561 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,561 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,561 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,562 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,564 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,565 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,566 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,566 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,566 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,567 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:09:19,594 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-10-16 03:09:19,649 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 03:09:19,657 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, mConcurrency=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 [2021-10-16 03:09:19,658 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-10-16 03:09:19,679 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-16 03:09:19,692 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 169 places, 162 transitions, 356 flow [2021-10-16 03:09:19,696 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 169 places, 162 transitions, 356 flow [2021-10-16 03:09:19,698 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 169 places, 162 transitions, 356 flow [2021-10-16 03:09:19,802 INFO L129 PetriNetUnfolder]: 6/158 cut-off events. [2021-10-16 03:09:19,802 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-10-16 03:09:19,812 INFO L84 FinitePrefix]: Finished finitePrefix Result has 175 conditions, 158 events. 6/158 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 138 event pairs, 0 based on Foata normal form. 0/151 useless extension candidates. Maximal degree in co-relation 117. Up to 2 conditions per place. [2021-10-16 03:09:19,820 INFO L116 LiptonReduction]: Number of co-enabled transitions 3864 [2021-10-16 03:09:27,904 INFO L131 LiptonReduction]: Checked pairs total: 12207 [2021-10-16 03:09:27,905 INFO L133 LiptonReduction]: Total number of compositions: 145 [2021-10-16 03:09:27,926 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 56 places, 46 transitions, 124 flow [2021-10-16 03:09:28,249 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 4146 states, 4145 states have (on average 4.15006031363088) internal successors, (17202), 4145 states have internal predecessors, (17202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:28,273 INFO L276 IsEmpty]: Start isEmpty. Operand has 4146 states, 4145 states have (on average 4.15006031363088) internal successors, (17202), 4145 states have internal predecessors, (17202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:28,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-16 03:09:28,340 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:09:28,341 INFO L512 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] [2021-10-16 03:09:28,342 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:09:28,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:09:28,349 INFO L82 PathProgramCache]: Analyzing trace with hash 411533357, now seen corresponding path program 1 times [2021-10-16 03:09:28,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:09:28,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689862133] [2021-10-16 03:09:28,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:09:28,368 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:09:28,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:09:28,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:09:28,584 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:09:28,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689862133] [2021-10-16 03:09:28,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689862133] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:09:28,587 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:09:28,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 03:09:28,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848286244] [2021-10-16 03:09:28,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 03:09:28,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:09:28,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 03:09:28,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 03:09:28,653 INFO L87 Difference]: Start difference. First operand has 4146 states, 4145 states have (on average 4.15006031363088) internal successors, (17202), 4145 states have internal predecessors, (17202), 0 states have call successors, (0), 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 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:28,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:09:28,859 INFO L93 Difference]: Finished difference Result 4146 states and 15422 transitions. [2021-10-16 03:09:28,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 03:09:28,861 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-16 03:09:28,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:09:28,963 INFO L225 Difference]: With dead ends: 4146 [2021-10-16 03:09:28,964 INFO L226 Difference]: Without dead ends: 4146 [2021-10-16 03:09:28,966 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 03:09:29,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4146 states. [2021-10-16 03:09:29,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4146 to 4146. [2021-10-16 03:09:29,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4146 states, 4145 states have (on average 3.720627261761158) internal successors, (15422), 4145 states have internal predecessors, (15422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:29,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4146 states to 4146 states and 15422 transitions. [2021-10-16 03:09:29,437 INFO L78 Accepts]: Start accepts. Automaton has 4146 states and 15422 transitions. Word has length 25 [2021-10-16 03:09:29,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:09:29,438 INFO L470 AbstractCegarLoop]: Abstraction has 4146 states and 15422 transitions. [2021-10-16 03:09:29,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:29,439 INFO L276 IsEmpty]: Start isEmpty. Operand 4146 states and 15422 transitions. [2021-10-16 03:09:29,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:09:29,461 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:09:29,462 INFO L512 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] [2021-10-16 03:09:29,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 03:09:29,463 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:09:29,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:09:29,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1000026437, now seen corresponding path program 1 times [2021-10-16 03:09:29,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:09:29,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460712580] [2021-10-16 03:09:29,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:09:29,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:09:29,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:09:29,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:09:29,989 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:09:29,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460712580] [2021-10-16 03:09:29,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460712580] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:09:29,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:09:29,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-16 03:09:29,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217775437] [2021-10-16 03:09:29,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-16 03:09:29,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:09:29,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-16 03:09:29,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-16 03:09:29,996 INFO L87 Difference]: Start difference. First operand 4146 states and 15422 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:31,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:09:31,075 INFO L93 Difference]: Finished difference Result 7808 states and 26778 transitions. [2021-10-16 03:09:31,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-16 03:09:31,082 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:09:31,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:09:31,189 INFO L225 Difference]: With dead ends: 7808 [2021-10-16 03:09:31,189 INFO L226 Difference]: Without dead ends: 7808 [2021-10-16 03:09:31,191 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 260.6ms TimeCoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2021-10-16 03:09:31,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7808 states. [2021-10-16 03:09:31,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7808 to 4742. [2021-10-16 03:09:31,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4742 states, 4741 states have (on average 3.6407930816283485) internal successors, (17261), 4741 states have internal predecessors, (17261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:31,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4742 states to 4742 states and 17261 transitions. [2021-10-16 03:09:31,779 INFO L78 Accepts]: Start accepts. Automaton has 4742 states and 17261 transitions. Word has length 38 [2021-10-16 03:09:31,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:09:31,780 INFO L470 AbstractCegarLoop]: Abstraction has 4742 states and 17261 transitions. [2021-10-16 03:09:31,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:31,781 INFO L276 IsEmpty]: Start isEmpty. Operand 4742 states and 17261 transitions. [2021-10-16 03:09:31,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:09:31,826 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:09:31,826 INFO L512 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] [2021-10-16 03:09:31,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 03:09:31,843 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:09:31,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:09:31,857 INFO L82 PathProgramCache]: Analyzing trace with hash 518717173, now seen corresponding path program 2 times [2021-10-16 03:09:31,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:09:31,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083137521] [2021-10-16 03:09:31,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:09:31,858 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:09:32,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:09:32,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:09:32,506 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:09:32,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083137521] [2021-10-16 03:09:32,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083137521] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:09:32,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:09:32,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-16 03:09:32,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297583728] [2021-10-16 03:09:32,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 03:09:32,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:09:32,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 03:09:32,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-16 03:09:32,510 INFO L87 Difference]: Start difference. First operand 4742 states and 17261 transitions. Second operand has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:33,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:09:33,037 INFO L93 Difference]: Finished difference Result 7191 states and 25098 transitions. [2021-10-16 03:09:33,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-16 03:09:33,038 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:09:33,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:09:33,141 INFO L225 Difference]: With dead ends: 7191 [2021-10-16 03:09:33,141 INFO L226 Difference]: Without dead ends: 6064 [2021-10-16 03:09:33,142 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 161.4ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:09:33,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6064 states. [2021-10-16 03:09:33,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6064 to 5834. [2021-10-16 03:09:33,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5834 states, 5833 states have (on average 3.5616320932624723) internal successors, (20775), 5833 states have internal predecessors, (20775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:33,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5834 states to 5834 states and 20775 transitions. [2021-10-16 03:09:33,624 INFO L78 Accepts]: Start accepts. Automaton has 5834 states and 20775 transitions. Word has length 38 [2021-10-16 03:09:33,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:09:33,626 INFO L470 AbstractCegarLoop]: Abstraction has 5834 states and 20775 transitions. [2021-10-16 03:09:33,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:33,628 INFO L276 IsEmpty]: Start isEmpty. Operand 5834 states and 20775 transitions. [2021-10-16 03:09:33,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:09:33,665 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:09:33,665 INFO L512 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] [2021-10-16 03:09:33,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-16 03:09:33,666 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:09:33,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:09:33,667 INFO L82 PathProgramCache]: Analyzing trace with hash -225624279, now seen corresponding path program 3 times [2021-10-16 03:09:33,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:09:33,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645631405] [2021-10-16 03:09:33,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:09:33,668 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:09:33,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:09:34,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:09:34,030 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:09:34,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645631405] [2021-10-16 03:09:34,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645631405] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:09:34,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:09:34,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-16 03:09:34,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547991893] [2021-10-16 03:09:34,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 03:09:34,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:09:34,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 03:09:34,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:09:34,036 INFO L87 Difference]: Start difference. First operand 5834 states and 20775 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:35,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:09:35,674 INFO L93 Difference]: Finished difference Result 9622 states and 30061 transitions. [2021-10-16 03:09:35,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-10-16 03:09:35,674 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:09:35,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:09:35,720 INFO L225 Difference]: With dead ends: 9622 [2021-10-16 03:09:35,720 INFO L226 Difference]: Without dead ends: 8112 [2021-10-16 03:09:35,721 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 607.2ms TimeCoverageRelationStatistics Valid=422, Invalid=1470, Unknown=0, NotChecked=0, Total=1892 [2021-10-16 03:09:35,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8112 states. [2021-10-16 03:09:36,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8112 to 5450. [2021-10-16 03:09:36,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5450 states, 5449 states have (on average 3.2650027527986785) internal successors, (17791), 5449 states have internal predecessors, (17791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:36,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5450 states to 5450 states and 17791 transitions. [2021-10-16 03:09:36,049 INFO L78 Accepts]: Start accepts. Automaton has 5450 states and 17791 transitions. Word has length 38 [2021-10-16 03:09:36,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:09:36,050 INFO L470 AbstractCegarLoop]: Abstraction has 5450 states and 17791 transitions. [2021-10-16 03:09:36,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:36,050 INFO L276 IsEmpty]: Start isEmpty. Operand 5450 states and 17791 transitions. [2021-10-16 03:09:36,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:09:36,075 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:09:36,075 INFO L512 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] [2021-10-16 03:09:36,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-16 03:09:36,076 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:09:36,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:09:36,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1662400279, now seen corresponding path program 4 times [2021-10-16 03:09:36,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:09:36,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861273756] [2021-10-16 03:09:36,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:09:36,078 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:09:36,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:09:36,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:09:36,418 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:09:36,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861273756] [2021-10-16 03:09:36,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861273756] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:09:36,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:09:36,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-16 03:09:36,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341780483] [2021-10-16 03:09:36,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 03:09:36,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:09:36,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 03:09:36,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:09:36,421 INFO L87 Difference]: Start difference. First operand 5450 states and 17791 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:37,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:09:37,513 INFO L93 Difference]: Finished difference Result 9460 states and 29762 transitions. [2021-10-16 03:09:37,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-16 03:09:37,514 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:09:37,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:09:37,568 INFO L225 Difference]: With dead ends: 9460 [2021-10-16 03:09:37,568 INFO L226 Difference]: Without dead ends: 9442 [2021-10-16 03:09:37,569 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 397.1ms TimeCoverageRelationStatistics Valid=345, Invalid=987, Unknown=0, NotChecked=0, Total=1332 [2021-10-16 03:09:37,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9442 states. [2021-10-16 03:09:37,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9442 to 5584. [2021-10-16 03:09:37,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5584 states, 5583 states have (on average 3.2713594841483076) internal successors, (18264), 5583 states have internal predecessors, (18264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:37,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5584 states to 5584 states and 18264 transitions. [2021-10-16 03:09:37,982 INFO L78 Accepts]: Start accepts. Automaton has 5584 states and 18264 transitions. Word has length 38 [2021-10-16 03:09:37,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:09:37,982 INFO L470 AbstractCegarLoop]: Abstraction has 5584 states and 18264 transitions. [2021-10-16 03:09:37,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:37,983 INFO L276 IsEmpty]: Start isEmpty. Operand 5584 states and 18264 transitions. [2021-10-16 03:09:38,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:09:38,007 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:09:38,007 INFO L512 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] [2021-10-16 03:09:38,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-16 03:09:38,008 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:09:38,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:09:38,008 INFO L82 PathProgramCache]: Analyzing trace with hash -172286121, now seen corresponding path program 5 times [2021-10-16 03:09:38,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:09:38,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437077572] [2021-10-16 03:09:38,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:09:38,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:09:38,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:09:38,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:09:38,160 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:09:38,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437077572] [2021-10-16 03:09:38,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437077572] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:09:38,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:09:38,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:09:38,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886783950] [2021-10-16 03:09:38,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:09:38,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:09:38,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:09:38,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:09:38,163 INFO L87 Difference]: Start difference. First operand 5584 states and 18264 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:39,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:09:39,379 INFO L93 Difference]: Finished difference Result 9916 states and 30971 transitions. [2021-10-16 03:09:39,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-16 03:09:39,379 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:09:39,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:09:39,428 INFO L225 Difference]: With dead ends: 9916 [2021-10-16 03:09:39,428 INFO L226 Difference]: Without dead ends: 9898 [2021-10-16 03:09:39,430 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 485.1ms TimeCoverageRelationStatistics Valid=500, Invalid=1570, Unknown=0, NotChecked=0, Total=2070 [2021-10-16 03:09:39,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9898 states. [2021-10-16 03:09:39,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9898 to 5704. [2021-10-16 03:09:39,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5704 states, 5703 states have (on average 3.264422233911976) internal successors, (18617), 5703 states have internal predecessors, (18617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:39,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5704 states to 5704 states and 18617 transitions. [2021-10-16 03:09:39,770 INFO L78 Accepts]: Start accepts. Automaton has 5704 states and 18617 transitions. Word has length 38 [2021-10-16 03:09:39,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:09:39,771 INFO L470 AbstractCegarLoop]: Abstraction has 5704 states and 18617 transitions. [2021-10-16 03:09:39,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:39,771 INFO L276 IsEmpty]: Start isEmpty. Operand 5704 states and 18617 transitions. [2021-10-16 03:09:39,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:09:39,806 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:09:39,806 INFO L512 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] [2021-10-16 03:09:39,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-16 03:09:39,807 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:09:39,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:09:39,807 INFO L82 PathProgramCache]: Analyzing trace with hash -834292741, now seen corresponding path program 6 times [2021-10-16 03:09:39,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:09:39,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971252301] [2021-10-16 03:09:39,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:09:39,808 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:09:39,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:09:40,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:09:40,058 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:09:40,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971252301] [2021-10-16 03:09:40,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971252301] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:09:40,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:09:40,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:09:40,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721851292] [2021-10-16 03:09:40,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:09:40,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:09:40,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:09:40,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:09:40,061 INFO L87 Difference]: Start difference. First operand 5704 states and 18617 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:41,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:09:41,233 INFO L93 Difference]: Finished difference Result 9772 states and 30506 transitions. [2021-10-16 03:09:41,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-16 03:09:41,234 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:09:41,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:09:41,271 INFO L225 Difference]: With dead ends: 9772 [2021-10-16 03:09:41,272 INFO L226 Difference]: Without dead ends: 9496 [2021-10-16 03:09:41,273 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 398.8ms TimeCoverageRelationStatistics Valid=385, Invalid=1421, Unknown=0, NotChecked=0, Total=1806 [2021-10-16 03:09:41,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9496 states. [2021-10-16 03:09:41,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9496 to 5872. [2021-10-16 03:09:41,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5872 states, 5871 states have (on average 3.273718276273207) internal successors, (19220), 5871 states have internal predecessors, (19220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:41,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5872 states to 5872 states and 19220 transitions. [2021-10-16 03:09:41,587 INFO L78 Accepts]: Start accepts. Automaton has 5872 states and 19220 transitions. Word has length 38 [2021-10-16 03:09:41,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:09:41,588 INFO L470 AbstractCegarLoop]: Abstraction has 5872 states and 19220 transitions. [2021-10-16 03:09:41,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:41,588 INFO L276 IsEmpty]: Start isEmpty. Operand 5872 states and 19220 transitions. [2021-10-16 03:09:41,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:09:41,608 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:09:41,609 INFO L512 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] [2021-10-16 03:09:41,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-16 03:09:41,609 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:09:41,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:09:41,610 INFO L82 PathProgramCache]: Analyzing trace with hash -418322777, now seen corresponding path program 7 times [2021-10-16 03:09:41,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:09:41,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85345415] [2021-10-16 03:09:41,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:09:41,611 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:09:41,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:09:41,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:09:41,826 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:09:41,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85345415] [2021-10-16 03:09:41,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85345415] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:09:41,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:09:41,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:09:41,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211944525] [2021-10-16 03:09:41,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:09:41,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:09:41,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:09:41,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:09:41,832 INFO L87 Difference]: Start difference. First operand 5872 states and 19220 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:43,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:09:43,365 INFO L93 Difference]: Finished difference Result 10116 states and 31464 transitions. [2021-10-16 03:09:43,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-10-16 03:09:43,366 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:09:43,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:09:43,409 INFO L225 Difference]: With dead ends: 10116 [2021-10-16 03:09:43,410 INFO L226 Difference]: Without dead ends: 9838 [2021-10-16 03:09:43,411 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 523.8ms TimeCoverageRelationStatistics Valid=540, Invalid=2112, Unknown=0, NotChecked=0, Total=2652 [2021-10-16 03:09:43,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9838 states. [2021-10-16 03:09:43,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9838 to 5976. [2021-10-16 03:09:43,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5976 states, 5975 states have (on average 3.27347280334728) internal successors, (19559), 5975 states have internal predecessors, (19559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:43,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5976 states to 5976 states and 19559 transitions. [2021-10-16 03:09:43,794 INFO L78 Accepts]: Start accepts. Automaton has 5976 states and 19559 transitions. Word has length 38 [2021-10-16 03:09:43,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:09:43,794 INFO L470 AbstractCegarLoop]: Abstraction has 5976 states and 19559 transitions. [2021-10-16 03:09:43,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:43,795 INFO L276 IsEmpty]: Start isEmpty. Operand 5976 states and 19559 transitions. [2021-10-16 03:09:43,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:09:43,820 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:09:43,820 INFO L512 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] [2021-10-16 03:09:43,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-16 03:09:43,821 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:09:43,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:09:43,822 INFO L82 PathProgramCache]: Analyzing trace with hash 794666965, now seen corresponding path program 8 times [2021-10-16 03:09:43,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:09:43,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416631079] [2021-10-16 03:09:43,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:09:43,827 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:09:43,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:09:43,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:09:43,989 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:09:43,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416631079] [2021-10-16 03:09:43,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416631079] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:09:43,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:09:43,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-16 03:09:43,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419938779] [2021-10-16 03:09:43,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 03:09:43,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:09:43,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 03:09:43,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:09:43,995 INFO L87 Difference]: Start difference. First operand 5976 states and 19559 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:44,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:09:44,808 INFO L93 Difference]: Finished difference Result 9988 states and 30909 transitions. [2021-10-16 03:09:44,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-16 03:09:44,808 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:09:44,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:09:44,853 INFO L225 Difference]: With dead ends: 9988 [2021-10-16 03:09:44,853 INFO L226 Difference]: Without dead ends: 9970 [2021-10-16 03:09:44,854 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 289.2ms TimeCoverageRelationStatistics Valid=238, Invalid=632, Unknown=0, NotChecked=0, Total=870 [2021-10-16 03:09:44,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9970 states. [2021-10-16 03:09:45,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9970 to 5988. [2021-10-16 03:09:45,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5988 states, 5987 states have (on average 3.2617337564723567) internal successors, (19528), 5987 states have internal predecessors, (19528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:45,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5988 states to 5988 states and 19528 transitions. [2021-10-16 03:09:45,184 INFO L78 Accepts]: Start accepts. Automaton has 5988 states and 19528 transitions. Word has length 38 [2021-10-16 03:09:45,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:09:45,185 INFO L470 AbstractCegarLoop]: Abstraction has 5988 states and 19528 transitions. [2021-10-16 03:09:45,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:45,185 INFO L276 IsEmpty]: Start isEmpty. Operand 5988 states and 19528 transitions. [2021-10-16 03:09:45,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:09:45,210 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:09:45,210 INFO L512 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] [2021-10-16 03:09:45,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-16 03:09:45,211 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:09:45,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:09:45,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1040019435, now seen corresponding path program 9 times [2021-10-16 03:09:45,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:09:45,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112167991] [2021-10-16 03:09:45,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:09:45,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:09:45,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:09:45,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:09:45,362 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:09:45,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112167991] [2021-10-16 03:09:45,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112167991] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:09:45,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:09:45,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:09:45,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417666238] [2021-10-16 03:09:45,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:09:45,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:09:45,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:09:45,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:09:45,365 INFO L87 Difference]: Start difference. First operand 5988 states and 19528 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:46,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:09:46,502 INFO L93 Difference]: Finished difference Result 10560 states and 32333 transitions. [2021-10-16 03:09:46,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-16 03:09:46,505 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:09:46,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:09:46,541 INFO L225 Difference]: With dead ends: 10560 [2021-10-16 03:09:46,541 INFO L226 Difference]: Without dead ends: 10534 [2021-10-16 03:09:46,542 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 463.3ms TimeCoverageRelationStatistics Valid=416, Invalid=1306, Unknown=0, NotChecked=0, Total=1722 [2021-10-16 03:09:46,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10534 states. [2021-10-16 03:09:46,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10534 to 5842. [2021-10-16 03:09:46,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5842 states, 5841 states have (on average 3.263482280431433) internal successors, (19062), 5841 states have internal predecessors, (19062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:46,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5842 states to 5842 states and 19062 transitions. [2021-10-16 03:09:46,867 INFO L78 Accepts]: Start accepts. Automaton has 5842 states and 19062 transitions. Word has length 38 [2021-10-16 03:09:46,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:09:46,868 INFO L470 AbstractCegarLoop]: Abstraction has 5842 states and 19062 transitions. [2021-10-16 03:09:46,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:46,868 INFO L276 IsEmpty]: Start isEmpty. Operand 5842 states and 19062 transitions. [2021-10-16 03:09:46,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:09:46,889 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:09:46,889 INFO L512 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] [2021-10-16 03:09:46,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-16 03:09:46,890 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:09:46,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:09:46,890 INFO L82 PathProgramCache]: Analyzing trace with hash -2034333055, now seen corresponding path program 10 times [2021-10-16 03:09:46,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:09:46,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107581117] [2021-10-16 03:09:46,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:09:46,891 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:09:46,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:09:47,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:09:47,058 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:09:47,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107581117] [2021-10-16 03:09:47,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107581117] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:09:47,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:09:47,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:09:47,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822200916] [2021-10-16 03:09:47,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:09:47,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:09:47,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:09:47,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:09:47,067 INFO L87 Difference]: Start difference. First operand 5842 states and 19062 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:47,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:09:47,802 INFO L93 Difference]: Finished difference Result 8716 states and 27192 transitions. [2021-10-16 03:09:47,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-16 03:09:47,803 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:09:47,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:09:47,821 INFO L225 Difference]: With dead ends: 8716 [2021-10-16 03:09:47,821 INFO L226 Difference]: Without dead ends: 8680 [2021-10-16 03:09:47,821 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 265.1ms TimeCoverageRelationStatistics Valid=244, Invalid=686, Unknown=0, NotChecked=0, Total=930 [2021-10-16 03:09:47,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8680 states. [2021-10-16 03:09:48,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8680 to 6226. [2021-10-16 03:09:48,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6226 states, 6225 states have (on average 3.25285140562249) internal successors, (20249), 6225 states have internal predecessors, (20249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:48,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6226 states to 6226 states and 20249 transitions. [2021-10-16 03:09:48,057 INFO L78 Accepts]: Start accepts. Automaton has 6226 states and 20249 transitions. Word has length 38 [2021-10-16 03:09:48,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:09:48,058 INFO L470 AbstractCegarLoop]: Abstraction has 6226 states and 20249 transitions. [2021-10-16 03:09:48,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:48,058 INFO L276 IsEmpty]: Start isEmpty. Operand 6226 states and 20249 transitions. [2021-10-16 03:09:48,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:09:48,079 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:09:48,079 INFO L512 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] [2021-10-16 03:09:48,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-16 03:09:48,080 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:09:48,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:09:48,080 INFO L82 PathProgramCache]: Analyzing trace with hash -739227799, now seen corresponding path program 11 times [2021-10-16 03:09:48,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:09:48,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643459364] [2021-10-16 03:09:48,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:09:48,081 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:09:48,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:09:48,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:09:48,255 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:09:48,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643459364] [2021-10-16 03:09:48,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643459364] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:09:48,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:09:48,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:09:48,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419543837] [2021-10-16 03:09:48,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:09:48,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:09:48,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:09:48,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:09:48,258 INFO L87 Difference]: Start difference. First operand 6226 states and 20249 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:49,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:09:49,276 INFO L93 Difference]: Finished difference Result 10282 states and 31577 transitions. [2021-10-16 03:09:49,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-16 03:09:49,277 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:09:49,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:09:49,303 INFO L225 Difference]: With dead ends: 10282 [2021-10-16 03:09:49,303 INFO L226 Difference]: Without dead ends: 9972 [2021-10-16 03:09:49,304 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 348.7ms TimeCoverageRelationStatistics Valid=280, Invalid=980, Unknown=0, NotChecked=0, Total=1260 [2021-10-16 03:09:49,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9972 states. [2021-10-16 03:09:49,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9972 to 6216. [2021-10-16 03:09:49,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6216 states, 6215 states have (on average 3.2479485116653257) internal successors, (20186), 6215 states have internal predecessors, (20186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:49,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6216 states to 6216 states and 20186 transitions. [2021-10-16 03:09:49,547 INFO L78 Accepts]: Start accepts. Automaton has 6216 states and 20186 transitions. Word has length 38 [2021-10-16 03:09:49,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:09:49,548 INFO L470 AbstractCegarLoop]: Abstraction has 6216 states and 20186 transitions. [2021-10-16 03:09:49,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:49,548 INFO L276 IsEmpty]: Start isEmpty. Operand 6216 states and 20186 transitions. [2021-10-16 03:09:49,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:09:49,565 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:09:49,565 INFO L512 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] [2021-10-16 03:09:49,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-16 03:09:49,566 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:09:49,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:09:49,567 INFO L82 PathProgramCache]: Analyzing trace with hash -323257835, now seen corresponding path program 12 times [2021-10-16 03:09:49,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:09:49,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704344297] [2021-10-16 03:09:49,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:09:49,567 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:09:49,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:09:49,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:09:49,793 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:09:49,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704344297] [2021-10-16 03:09:49,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704344297] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:09:49,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:09:49,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:09:49,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150248161] [2021-10-16 03:09:49,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:09:49,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:09:49,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:09:49,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:09:49,795 INFO L87 Difference]: Start difference. First operand 6216 states and 20186 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:51,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:09:51,384 INFO L93 Difference]: Finished difference Result 11038 states and 33631 transitions. [2021-10-16 03:09:51,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-10-16 03:09:51,385 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:09:51,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:09:51,410 INFO L225 Difference]: With dead ends: 11038 [2021-10-16 03:09:51,411 INFO L226 Difference]: Without dead ends: 10654 [2021-10-16 03:09:51,412 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 592.8ms TimeCoverageRelationStatistics Valid=487, Invalid=1963, Unknown=0, NotChecked=0, Total=2450 [2021-10-16 03:09:51,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10654 states. [2021-10-16 03:09:51,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10654 to 5998. [2021-10-16 03:09:51,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5998 states, 5997 states have (on average 3.238119059529765) internal successors, (19419), 5997 states have internal predecessors, (19419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:51,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5998 states to 5998 states and 19419 transitions. [2021-10-16 03:09:51,674 INFO L78 Accepts]: Start accepts. Automaton has 5998 states and 19419 transitions. Word has length 38 [2021-10-16 03:09:51,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:09:51,674 INFO L470 AbstractCegarLoop]: Abstraction has 5998 states and 19419 transitions. [2021-10-16 03:09:51,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:51,675 INFO L276 IsEmpty]: Start isEmpty. Operand 5998 states and 19419 transitions. [2021-10-16 03:09:51,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:09:51,691 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:09:51,691 INFO L512 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] [2021-10-16 03:09:51,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-16 03:09:51,691 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:09:51,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:09:51,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1071534799, now seen corresponding path program 13 times [2021-10-16 03:09:51,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:09:51,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888966406] [2021-10-16 03:09:51,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:09:51,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:09:51,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:09:51,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:09:51,894 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:09:51,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888966406] [2021-10-16 03:09:51,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888966406] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:09:51,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:09:51,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:09:51,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294648195] [2021-10-16 03:09:51,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:09:51,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:09:51,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:09:51,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:09:51,896 INFO L87 Difference]: Start difference. First operand 5998 states and 19419 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:52,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:09:52,932 INFO L93 Difference]: Finished difference Result 9106 states and 28134 transitions. [2021-10-16 03:09:52,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-16 03:09:52,943 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:09:52,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:09:52,970 INFO L225 Difference]: With dead ends: 9106 [2021-10-16 03:09:52,970 INFO L226 Difference]: Without dead ends: 8730 [2021-10-16 03:09:52,972 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 429.9ms TimeCoverageRelationStatistics Valid=272, Invalid=1060, Unknown=0, NotChecked=0, Total=1332 [2021-10-16 03:09:52,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8730 states. [2021-10-16 03:09:53,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8730 to 6168. [2021-10-16 03:09:53,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6168 states, 6167 states have (on average 3.251662072320415) internal successors, (20053), 6167 states have internal predecessors, (20053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:53,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6168 states to 6168 states and 20053 transitions. [2021-10-16 03:09:53,219 INFO L78 Accepts]: Start accepts. Automaton has 6168 states and 20053 transitions. Word has length 38 [2021-10-16 03:09:53,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:09:53,219 INFO L470 AbstractCegarLoop]: Abstraction has 6168 states and 20053 transitions. [2021-10-16 03:09:53,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:53,220 INFO L276 IsEmpty]: Start isEmpty. Operand 6168 states and 20053 transitions. [2021-10-16 03:09:53,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:09:53,238 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:09:53,238 INFO L512 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] [2021-10-16 03:09:53,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-16 03:09:53,239 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:09:53,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:09:53,239 INFO L82 PathProgramCache]: Analyzing trace with hash -2013932553, now seen corresponding path program 14 times [2021-10-16 03:09:53,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:09:53,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910979945] [2021-10-16 03:09:53,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:09:53,240 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:09:53,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:09:53,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:09:53,361 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:09:53,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910979945] [2021-10-16 03:09:53,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910979945] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:09:53,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:09:53,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-16 03:09:53,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881768220] [2021-10-16 03:09:53,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-16 03:09:53,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:09:53,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-16 03:09:53,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-16 03:09:53,367 INFO L87 Difference]: Start difference. First operand 6168 states and 20053 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:53,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:09:53,957 INFO L93 Difference]: Finished difference Result 6700 states and 19940 transitions. [2021-10-16 03:09:53,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-16 03:09:53,958 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:09:53,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:09:53,975 INFO L225 Difference]: With dead ends: 6700 [2021-10-16 03:09:53,976 INFO L226 Difference]: Without dead ends: 5552 [2021-10-16 03:09:53,978 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 171.6ms TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2021-10-16 03:09:53,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5552 states. [2021-10-16 03:09:54,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5552 to 4230. [2021-10-16 03:09:54,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4230 states, 4229 states have (on average 3.0721210688105933) internal successors, (12992), 4229 states have internal predecessors, (12992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:54,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4230 states to 4230 states and 12992 transitions. [2021-10-16 03:09:54,126 INFO L78 Accepts]: Start accepts. Automaton has 4230 states and 12992 transitions. Word has length 38 [2021-10-16 03:09:54,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:09:54,128 INFO L470 AbstractCegarLoop]: Abstraction has 4230 states and 12992 transitions. [2021-10-16 03:09:54,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:54,128 INFO L276 IsEmpty]: Start isEmpty. Operand 4230 states and 12992 transitions. [2021-10-16 03:09:54,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:09:54,139 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:09:54,139 INFO L512 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] [2021-10-16 03:09:54,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-16 03:09:54,140 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:09:54,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:09:54,140 INFO L82 PathProgramCache]: Analyzing trace with hash -718039093, now seen corresponding path program 15 times [2021-10-16 03:09:54,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:09:54,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465973917] [2021-10-16 03:09:54,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:09:54,141 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:09:54,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:09:54,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:09:54,330 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:09:54,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465973917] [2021-10-16 03:09:54,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465973917] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:09:54,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:09:54,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:09:54,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226705773] [2021-10-16 03:09:54,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:09:54,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:09:54,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:09:54,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:09:54,336 INFO L87 Difference]: Start difference. First operand 4230 states and 12992 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:55,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:09:55,148 INFO L93 Difference]: Finished difference Result 5750 states and 17160 transitions. [2021-10-16 03:09:55,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-16 03:09:55,149 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:09:55,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:09:55,168 INFO L225 Difference]: With dead ends: 5750 [2021-10-16 03:09:55,168 INFO L226 Difference]: Without dead ends: 5736 [2021-10-16 03:09:55,169 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 291.2ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-10-16 03:09:55,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5736 states. [2021-10-16 03:09:55,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5736 to 4364. [2021-10-16 03:09:55,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4364 states, 4363 states have (on average 3.06188402475361) internal successors, (13359), 4363 states have internal predecessors, (13359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:55,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4364 states to 4364 states and 13359 transitions. [2021-10-16 03:09:55,313 INFO L78 Accepts]: Start accepts. Automaton has 4364 states and 13359 transitions. Word has length 38 [2021-10-16 03:09:55,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:09:55,313 INFO L470 AbstractCegarLoop]: Abstraction has 4364 states and 13359 transitions. [2021-10-16 03:09:55,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:55,313 INFO L276 IsEmpty]: Start isEmpty. Operand 4364 states and 13359 transitions. [2021-10-16 03:09:55,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:09:55,321 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:09:55,321 INFO L512 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] [2021-10-16 03:09:55,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-16 03:09:55,321 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:09:55,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:09:55,322 INFO L82 PathProgramCache]: Analyzing trace with hash -210974729, now seen corresponding path program 16 times [2021-10-16 03:09:55,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:09:55,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160781401] [2021-10-16 03:09:55,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:09:55,323 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:09:55,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:09:55,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:09:55,486 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:09:55,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160781401] [2021-10-16 03:09:55,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160781401] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:09:55,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:09:55,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-16 03:09:55,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387785644] [2021-10-16 03:09:55,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 03:09:55,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:09:55,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 03:09:55,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:09:55,490 INFO L87 Difference]: Start difference. First operand 4364 states and 13359 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:56,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:09:56,238 INFO L93 Difference]: Finished difference Result 6542 states and 19753 transitions. [2021-10-16 03:09:56,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-16 03:09:56,239 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:09:56,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:09:56,261 INFO L225 Difference]: With dead ends: 6542 [2021-10-16 03:09:56,261 INFO L226 Difference]: Without dead ends: 6530 [2021-10-16 03:09:56,263 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 228.8ms TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-10-16 03:09:56,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6530 states. [2021-10-16 03:09:56,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6530 to 4458. [2021-10-16 03:09:56,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4458 states, 4457 states have (on average 3.070226609827238) internal successors, (13684), 4457 states have internal predecessors, (13684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:56,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4458 states to 4458 states and 13684 transitions. [2021-10-16 03:09:56,403 INFO L78 Accepts]: Start accepts. Automaton has 4458 states and 13684 transitions. Word has length 38 [2021-10-16 03:09:56,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:09:56,404 INFO L470 AbstractCegarLoop]: Abstraction has 4458 states and 13684 transitions. [2021-10-16 03:09:56,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:56,404 INFO L276 IsEmpty]: Start isEmpty. Operand 4458 states and 13684 transitions. [2021-10-16 03:09:56,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:09:56,415 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:09:56,416 INFO L512 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] [2021-10-16 03:09:56,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-16 03:09:56,416 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:09:56,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:09:56,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1281788565, now seen corresponding path program 17 times [2021-10-16 03:09:56,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:09:56,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564246559] [2021-10-16 03:09:56,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:09:56,418 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:09:56,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:09:56,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:09:56,565 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:09:56,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564246559] [2021-10-16 03:09:56,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564246559] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:09:56,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:09:56,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:09:56,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729674589] [2021-10-16 03:09:56,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:09:56,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:09:56,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:09:56,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:09:56,568 INFO L87 Difference]: Start difference. First operand 4458 states and 13684 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:57,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:09:57,543 INFO L93 Difference]: Finished difference Result 6910 states and 20708 transitions. [2021-10-16 03:09:57,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-16 03:09:57,544 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:09:57,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:09:57,559 INFO L225 Difference]: With dead ends: 6910 [2021-10-16 03:09:57,559 INFO L226 Difference]: Without dead ends: 6894 [2021-10-16 03:09:57,560 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 350.9ms TimeCoverageRelationStatistics Valid=260, Invalid=862, Unknown=0, NotChecked=0, Total=1122 [2021-10-16 03:09:57,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6894 states. [2021-10-16 03:09:57,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6894 to 4462. [2021-10-16 03:09:57,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4462 states, 4461 states have (on average 3.070611970410222) internal successors, (13698), 4461 states have internal predecessors, (13698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:57,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4462 states to 4462 states and 13698 transitions. [2021-10-16 03:09:57,721 INFO L78 Accepts]: Start accepts. Automaton has 4462 states and 13698 transitions. Word has length 38 [2021-10-16 03:09:57,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:09:57,721 INFO L470 AbstractCegarLoop]: Abstraction has 4462 states and 13698 transitions. [2021-10-16 03:09:57,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:57,722 INFO L276 IsEmpty]: Start isEmpty. Operand 4462 states and 13698 transitions. [2021-10-16 03:09:57,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:09:57,729 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:09:57,729 INFO L512 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] [2021-10-16 03:09:57,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-16 03:09:57,729 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:09:57,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:09:57,730 INFO L82 PathProgramCache]: Analyzing trace with hash -810556433, now seen corresponding path program 18 times [2021-10-16 03:09:57,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:09:57,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786107373] [2021-10-16 03:09:57,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:09:57,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:09:57,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:09:57,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:09:57,881 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:09:57,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786107373] [2021-10-16 03:09:57,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786107373] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:09:57,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:09:57,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:09:57,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71874129] [2021-10-16 03:09:57,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:09:57,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:09:57,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:09:57,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:09:57,883 INFO L87 Difference]: Start difference. First operand 4462 states and 13698 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:58,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:09:58,733 INFO L93 Difference]: Finished difference Result 6368 states and 18888 transitions. [2021-10-16 03:09:58,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-16 03:09:58,739 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:09:58,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:09:58,760 INFO L225 Difference]: With dead ends: 6368 [2021-10-16 03:09:58,760 INFO L226 Difference]: Without dead ends: 6176 [2021-10-16 03:09:58,761 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 315.4ms TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2021-10-16 03:09:58,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6176 states. [2021-10-16 03:09:58,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6176 to 4614. [2021-10-16 03:09:58,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4614 states, 4613 states have (on average 3.0585302406243224) internal successors, (14109), 4613 states have internal predecessors, (14109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:58,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4614 states to 4614 states and 14109 transitions. [2021-10-16 03:09:58,918 INFO L78 Accepts]: Start accepts. Automaton has 4614 states and 14109 transitions. Word has length 38 [2021-10-16 03:09:58,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:09:58,919 INFO L470 AbstractCegarLoop]: Abstraction has 4614 states and 14109 transitions. [2021-10-16 03:09:58,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:58,919 INFO L276 IsEmpty]: Start isEmpty. Operand 4614 states and 14109 transitions. [2021-10-16 03:09:58,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:09:58,930 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:09:58,930 INFO L512 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] [2021-10-16 03:09:58,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-16 03:09:58,931 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:09:58,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:09:58,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1790948853, now seen corresponding path program 19 times [2021-10-16 03:09:58,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:09:58,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167902492] [2021-10-16 03:09:58,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:09:58,932 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:09:58,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:09:59,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:09:59,079 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:09:59,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167902492] [2021-10-16 03:09:59,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167902492] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:09:59,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:09:59,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:09:59,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075779527] [2021-10-16 03:09:59,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:09:59,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:09:59,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:09:59,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:09:59,082 INFO L87 Difference]: Start difference. First operand 4614 states and 14109 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:59,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:09:59,839 INFO L93 Difference]: Finished difference Result 6814 states and 20420 transitions. [2021-10-16 03:09:59,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-16 03:09:59,843 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:09:59,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:09:59,859 INFO L225 Difference]: With dead ends: 6814 [2021-10-16 03:09:59,859 INFO L226 Difference]: Without dead ends: 6640 [2021-10-16 03:09:59,860 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 266.1ms TimeCoverageRelationStatistics Valid=200, Invalid=730, Unknown=0, NotChecked=0, Total=930 [2021-10-16 03:09:59,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6640 states. [2021-10-16 03:09:59,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6640 to 4690. [2021-10-16 03:09:59,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4690 states, 4689 states have (on average 3.0637662614629986) internal successors, (14366), 4689 states have internal predecessors, (14366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:59,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4690 states to 4690 states and 14366 transitions. [2021-10-16 03:09:59,968 INFO L78 Accepts]: Start accepts. Automaton has 4690 states and 14366 transitions. Word has length 38 [2021-10-16 03:09:59,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:09:59,968 INFO L470 AbstractCegarLoop]: Abstraction has 4690 states and 14366 transitions. [2021-10-16 03:09:59,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:59,969 INFO L276 IsEmpty]: Start isEmpty. Operand 4690 states and 14366 transitions. [2021-10-16 03:09:59,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:09:59,979 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:09:59,979 INFO L512 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] [2021-10-16 03:09:59,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-16 03:09:59,980 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:09:59,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:09:59,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1116561643, now seen corresponding path program 20 times [2021-10-16 03:09:59,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:09:59,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336975959] [2021-10-16 03:09:59,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:09:59,981 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:00,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:00,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:00,111 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:00,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336975959] [2021-10-16 03:10:00,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336975959] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:00,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:00,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:10:00,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220461584] [2021-10-16 03:10:00,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:10:00,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:00,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:10:00,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:10:00,114 INFO L87 Difference]: Start difference. First operand 4690 states and 14366 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:01,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:01,230 INFO L93 Difference]: Finished difference Result 6826 states and 20153 transitions. [2021-10-16 03:10:01,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-16 03:10:01,230 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:01,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:01,243 INFO L225 Difference]: With dead ends: 6826 [2021-10-16 03:10:01,243 INFO L226 Difference]: Without dead ends: 6606 [2021-10-16 03:10:01,244 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 409.1ms TimeCoverageRelationStatistics Valid=331, Invalid=1391, Unknown=0, NotChecked=0, Total=1722 [2021-10-16 03:10:01,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6606 states. [2021-10-16 03:10:01,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6606 to 4690. [2021-10-16 03:10:01,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4690 states, 4689 states have (on average 3.0629132011089784) internal successors, (14362), 4689 states have internal predecessors, (14362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:01,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4690 states to 4690 states and 14362 transitions. [2021-10-16 03:10:01,364 INFO L78 Accepts]: Start accepts. Automaton has 4690 states and 14362 transitions. Word has length 38 [2021-10-16 03:10:01,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:01,365 INFO L470 AbstractCegarLoop]: Abstraction has 4690 states and 14362 transitions. [2021-10-16 03:10:01,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:01,365 INFO L276 IsEmpty]: Start isEmpty. Operand 4690 states and 14362 transitions. [2021-10-16 03:10:01,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:01,376 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:01,376 INFO L512 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] [2021-10-16 03:10:01,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-10-16 03:10:01,377 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:01,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:01,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1168689487, now seen corresponding path program 21 times [2021-10-16 03:10:01,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:01,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434083655] [2021-10-16 03:10:01,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:01,378 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:01,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:01,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:01,486 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:01,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434083655] [2021-10-16 03:10:01,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434083655] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:01,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:01,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-16 03:10:01,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844919141] [2021-10-16 03:10:01,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-16 03:10:01,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:01,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-16 03:10:01,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-16 03:10:01,489 INFO L87 Difference]: Start difference. First operand 4690 states and 14362 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:02,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:02,008 INFO L93 Difference]: Finished difference Result 6932 states and 20770 transitions. [2021-10-16 03:10:02,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-16 03:10:02,009 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:02,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:02,028 INFO L225 Difference]: With dead ends: 6932 [2021-10-16 03:10:02,028 INFO L226 Difference]: Without dead ends: 6924 [2021-10-16 03:10:02,030 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 144.2ms TimeCoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2021-10-16 03:10:02,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6924 states. [2021-10-16 03:10:02,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6924 to 4712. [2021-10-16 03:10:02,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4712 states, 4711 states have (on average 3.061982593929102) internal successors, (14425), 4711 states have internal predecessors, (14425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:02,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4712 states to 4712 states and 14425 transitions. [2021-10-16 03:10:02,252 INFO L78 Accepts]: Start accepts. Automaton has 4712 states and 14425 transitions. Word has length 38 [2021-10-16 03:10:02,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:02,253 INFO L470 AbstractCegarLoop]: Abstraction has 4712 states and 14425 transitions. [2021-10-16 03:10:02,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:02,253 INFO L276 IsEmpty]: Start isEmpty. Operand 4712 states and 14425 transitions. [2021-10-16 03:10:02,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:02,267 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:02,268 INFO L512 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] [2021-10-16 03:10:02,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-10-16 03:10:02,268 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:02,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:02,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1565116113, now seen corresponding path program 22 times [2021-10-16 03:10:02,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:02,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960178353] [2021-10-16 03:10:02,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:02,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:02,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:02,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:02,405 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:02,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960178353] [2021-10-16 03:10:02,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960178353] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:02,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:02,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-16 03:10:02,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339981463] [2021-10-16 03:10:02,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 03:10:02,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:02,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 03:10:02,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:10:02,410 INFO L87 Difference]: Start difference. First operand 4712 states and 14425 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:03,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:03,110 INFO L93 Difference]: Finished difference Result 7086 states and 21111 transitions. [2021-10-16 03:10:03,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-16 03:10:03,111 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:03,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:03,134 INFO L225 Difference]: With dead ends: 7086 [2021-10-16 03:10:03,135 INFO L226 Difference]: Without dead ends: 6916 [2021-10-16 03:10:03,135 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 209.6ms TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2021-10-16 03:10:03,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6916 states. [2021-10-16 03:10:03,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6916 to 4692. [2021-10-16 03:10:03,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4692 states, 4691 states have (on average 3.062673204007674) internal successors, (14367), 4691 states have internal predecessors, (14367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:03,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4692 states to 4692 states and 14367 transitions. [2021-10-16 03:10:03,332 INFO L78 Accepts]: Start accepts. Automaton has 4692 states and 14367 transitions. Word has length 38 [2021-10-16 03:10:03,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:03,332 INFO L470 AbstractCegarLoop]: Abstraction has 4692 states and 14367 transitions. [2021-10-16 03:10:03,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:03,333 INFO L276 IsEmpty]: Start isEmpty. Operand 4692 states and 14367 transitions. [2021-10-16 03:10:03,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:03,350 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:03,350 INFO L512 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] [2021-10-16 03:10:03,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-10-16 03:10:03,351 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:03,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:03,352 INFO L82 PathProgramCache]: Analyzing trace with hash -599856517, now seen corresponding path program 23 times [2021-10-16 03:10:03,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:03,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32342027] [2021-10-16 03:10:03,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:03,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:03,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:03,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:03,483 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:03,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32342027] [2021-10-16 03:10:03,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32342027] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:03,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:03,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-16 03:10:03,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815511556] [2021-10-16 03:10:03,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 03:10:03,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:03,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 03:10:03,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:10:03,486 INFO L87 Difference]: Start difference. First operand 4692 states and 14367 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:04,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:04,158 INFO L93 Difference]: Finished difference Result 6870 states and 20329 transitions. [2021-10-16 03:10:04,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-16 03:10:04,159 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:04,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:04,176 INFO L225 Difference]: With dead ends: 6870 [2021-10-16 03:10:04,176 INFO L226 Difference]: Without dead ends: 6854 [2021-10-16 03:10:04,177 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 204.1ms TimeCoverageRelationStatistics Valid=181, Invalid=521, Unknown=0, NotChecked=0, Total=702 [2021-10-16 03:10:04,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6854 states. [2021-10-16 03:10:04,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6854 to 4674. [2021-10-16 03:10:04,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4674 states, 4673 states have (on average 3.0584207147442757) internal successors, (14292), 4673 states have internal predecessors, (14292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:04,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4674 states to 4674 states and 14292 transitions. [2021-10-16 03:10:04,298 INFO L78 Accepts]: Start accepts. Automaton has 4674 states and 14292 transitions. Word has length 38 [2021-10-16 03:10:04,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:04,298 INFO L470 AbstractCegarLoop]: Abstraction has 4674 states and 14292 transitions. [2021-10-16 03:10:04,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:04,298 INFO L276 IsEmpty]: Start isEmpty. Operand 4674 states and 14292 transitions. [2021-10-16 03:10:04,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:04,308 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:04,308 INFO L512 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] [2021-10-16 03:10:04,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-10-16 03:10:04,309 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:04,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:04,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1670670353, now seen corresponding path program 24 times [2021-10-16 03:10:04,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:04,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375486030] [2021-10-16 03:10:04,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:04,310 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:04,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:04,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:04,444 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:04,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375486030] [2021-10-16 03:10:04,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375486030] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:04,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:04,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:10:04,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708190308] [2021-10-16 03:10:04,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:10:04,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:04,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:10:04,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:10:04,446 INFO L87 Difference]: Start difference. First operand 4674 states and 14292 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:05,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:05,299 INFO L93 Difference]: Finished difference Result 7116 states and 20990 transitions. [2021-10-16 03:10:05,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-16 03:10:05,300 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:05,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:05,321 INFO L225 Difference]: With dead ends: 7116 [2021-10-16 03:10:05,321 INFO L226 Difference]: Without dead ends: 7106 [2021-10-16 03:10:05,322 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 294.2ms TimeCoverageRelationStatistics Valid=255, Invalid=801, Unknown=0, NotChecked=0, Total=1056 [2021-10-16 03:10:05,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7106 states. [2021-10-16 03:10:05,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7106 to 4672. [2021-10-16 03:10:05,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4672 states, 4671 states have (on average 3.0560907728537785) internal successors, (14275), 4671 states have internal predecessors, (14275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:05,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4672 states to 4672 states and 14275 transitions. [2021-10-16 03:10:05,484 INFO L78 Accepts]: Start accepts. Automaton has 4672 states and 14275 transitions. Word has length 38 [2021-10-16 03:10:05,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:05,484 INFO L470 AbstractCegarLoop]: Abstraction has 4672 states and 14275 transitions. [2021-10-16 03:10:05,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:05,485 INFO L276 IsEmpty]: Start isEmpty. Operand 4672 states and 14275 transitions. [2021-10-16 03:10:05,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:05,495 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:05,495 INFO L512 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] [2021-10-16 03:10:05,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-10-16 03:10:05,496 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:05,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:05,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1494584405, now seen corresponding path program 25 times [2021-10-16 03:10:05,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:05,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041791669] [2021-10-16 03:10:05,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:05,497 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:05,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:05,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:05,665 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:05,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041791669] [2021-10-16 03:10:05,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041791669] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:05,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:05,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:10:05,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076373387] [2021-10-16 03:10:05,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:10:05,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:05,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:10:05,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:10:05,670 INFO L87 Difference]: Start difference. First operand 4672 states and 14275 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:06,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:06,491 INFO L93 Difference]: Finished difference Result 6986 states and 20553 transitions. [2021-10-16 03:10:06,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-16 03:10:06,491 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:06,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:06,506 INFO L225 Difference]: With dead ends: 6986 [2021-10-16 03:10:06,506 INFO L226 Difference]: Without dead ends: 6814 [2021-10-16 03:10:06,507 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 283.0ms TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2021-10-16 03:10:06,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6814 states. [2021-10-16 03:10:06,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6814 to 4620. [2021-10-16 03:10:06,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4620 states, 4619 states have (on average 3.05174280147218) internal successors, (14096), 4619 states have internal predecessors, (14096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:06,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4620 states to 4620 states and 14096 transitions. [2021-10-16 03:10:06,613 INFO L78 Accepts]: Start accepts. Automaton has 4620 states and 14096 transitions. Word has length 38 [2021-10-16 03:10:06,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:06,614 INFO L470 AbstractCegarLoop]: Abstraction has 4620 states and 14096 transitions. [2021-10-16 03:10:06,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:06,614 INFO L276 IsEmpty]: Start isEmpty. Operand 4620 states and 14096 transitions. [2021-10-16 03:10:06,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:06,621 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:06,621 INFO L512 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] [2021-10-16 03:10:06,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-10-16 03:10:06,621 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:06,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:06,621 INFO L82 PathProgramCache]: Analyzing trace with hash 820197195, now seen corresponding path program 26 times [2021-10-16 03:10:06,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:06,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323024362] [2021-10-16 03:10:06,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:06,622 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:06,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:06,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:06,760 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:06,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323024362] [2021-10-16 03:10:06,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323024362] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:06,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:06,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:10:06,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705378492] [2021-10-16 03:10:06,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:10:06,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:06,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:10:06,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:10:06,763 INFO L87 Difference]: Start difference. First operand 4620 states and 14096 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:07,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:07,721 INFO L93 Difference]: Finished difference Result 6984 states and 20370 transitions. [2021-10-16 03:10:07,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-16 03:10:07,722 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:07,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:07,743 INFO L225 Difference]: With dead ends: 6984 [2021-10-16 03:10:07,743 INFO L226 Difference]: Without dead ends: 6810 [2021-10-16 03:10:07,744 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 345.7ms TimeCoverageRelationStatistics Valid=295, Invalid=1187, Unknown=0, NotChecked=0, Total=1482 [2021-10-16 03:10:07,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6810 states. [2021-10-16 03:10:07,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6810 to 4334. [2021-10-16 03:10:07,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4334 states, 4333 states have (on average 3.033233325640434) internal successors, (13143), 4333 states have internal predecessors, (13143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:07,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4334 states to 4334 states and 13143 transitions. [2021-10-16 03:10:07,863 INFO L78 Accepts]: Start accepts. Automaton has 4334 states and 13143 transitions. Word has length 38 [2021-10-16 03:10:07,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:07,863 INFO L470 AbstractCegarLoop]: Abstraction has 4334 states and 13143 transitions. [2021-10-16 03:10:07,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:07,864 INFO L276 IsEmpty]: Start isEmpty. Operand 4334 states and 13143 transitions. [2021-10-16 03:10:07,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:07,900 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:07,900 INFO L512 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] [2021-10-16 03:10:07,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-10-16 03:10:07,901 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:07,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:07,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1924801149, now seen corresponding path program 27 times [2021-10-16 03:10:07,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:07,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438181305] [2021-10-16 03:10:07,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:07,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:07,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:08,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:08,027 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:08,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438181305] [2021-10-16 03:10:08,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438181305] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:08,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:08,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-16 03:10:08,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022583631] [2021-10-16 03:10:08,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 03:10:08,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:08,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 03:10:08,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:10:08,030 INFO L87 Difference]: Start difference. First operand 4334 states and 13143 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:08,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:08,608 INFO L93 Difference]: Finished difference Result 7210 states and 21090 transitions. [2021-10-16 03:10:08,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-16 03:10:08,609 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:08,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:08,623 INFO L225 Difference]: With dead ends: 7210 [2021-10-16 03:10:08,623 INFO L226 Difference]: Without dead ends: 7202 [2021-10-16 03:10:08,623 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 210.3ms TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2021-10-16 03:10:08,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7202 states. [2021-10-16 03:10:08,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7202 to 4448. [2021-10-16 03:10:08,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4448 states, 4447 states have (on average 3.026759613222397) internal successors, (13460), 4447 states have internal predecessors, (13460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:08,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4448 states to 4448 states and 13460 transitions. [2021-10-16 03:10:08,727 INFO L78 Accepts]: Start accepts. Automaton has 4448 states and 13460 transitions. Word has length 38 [2021-10-16 03:10:08,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:08,728 INFO L470 AbstractCegarLoop]: Abstraction has 4448 states and 13460 transitions. [2021-10-16 03:10:08,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:08,728 INFO L276 IsEmpty]: Start isEmpty. Operand 4448 states and 13460 transitions. [2021-10-16 03:10:08,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:08,734 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:08,734 INFO L512 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] [2021-10-16 03:10:08,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-10-16 03:10:08,735 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:08,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:08,735 INFO L82 PathProgramCache]: Analyzing trace with hash -325855215, now seen corresponding path program 28 times [2021-10-16 03:10:08,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:08,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635554896] [2021-10-16 03:10:08,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:08,736 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:08,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:08,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:08,886 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:08,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635554896] [2021-10-16 03:10:08,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635554896] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:08,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:08,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:10:08,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635243489] [2021-10-16 03:10:08,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:10:08,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:08,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:10:08,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:10:08,888 INFO L87 Difference]: Start difference. First operand 4448 states and 13460 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:09,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:09,691 INFO L93 Difference]: Finished difference Result 7376 states and 21409 transitions. [2021-10-16 03:10:09,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-16 03:10:09,692 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:09,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:09,707 INFO L225 Difference]: With dead ends: 7376 [2021-10-16 03:10:09,707 INFO L226 Difference]: Without dead ends: 7124 [2021-10-16 03:10:09,708 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 277.8ms TimeCoverageRelationStatistics Valid=252, Invalid=938, Unknown=0, NotChecked=0, Total=1190 [2021-10-16 03:10:09,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7124 states. [2021-10-16 03:10:09,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7124 to 4544. [2021-10-16 03:10:09,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4544 states, 4543 states have (on average 3.0250935505172794) internal successors, (13743), 4543 states have internal predecessors, (13743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:09,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4544 states to 4544 states and 13743 transitions. [2021-10-16 03:10:09,816 INFO L78 Accepts]: Start accepts. Automaton has 4544 states and 13743 transitions. Word has length 38 [2021-10-16 03:10:09,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:09,817 INFO L470 AbstractCegarLoop]: Abstraction has 4544 states and 13743 transitions. [2021-10-16 03:10:09,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:09,817 INFO L276 IsEmpty]: Start isEmpty. Operand 4544 states and 13743 transitions. [2021-10-16 03:10:09,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:09,823 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:09,824 INFO L512 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] [2021-10-16 03:10:09,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-10-16 03:10:09,824 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:09,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:09,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1562169343, now seen corresponding path program 29 times [2021-10-16 03:10:09,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:09,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846954758] [2021-10-16 03:10:09,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:09,826 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:09,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:09,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:09,953 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:09,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846954758] [2021-10-16 03:10:09,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846954758] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:09,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:09,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-16 03:10:09,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043201978] [2021-10-16 03:10:09,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 03:10:09,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:09,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 03:10:09,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:10:09,956 INFO L87 Difference]: Start difference. First operand 4544 states and 13743 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:10,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:10,679 INFO L93 Difference]: Finished difference Result 7126 states and 21112 transitions. [2021-10-16 03:10:10,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-16 03:10:10,680 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:10,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:10,700 INFO L225 Difference]: With dead ends: 7126 [2021-10-16 03:10:10,701 INFO L226 Difference]: Without dead ends: 7118 [2021-10-16 03:10:10,702 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 254.5ms TimeCoverageRelationStatistics Valid=237, Invalid=755, Unknown=0, NotChecked=0, Total=992 [2021-10-16 03:10:10,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7118 states. [2021-10-16 03:10:10,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7118 to 4574. [2021-10-16 03:10:10,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4574 states, 4573 states have (on average 3.028427727968511) internal successors, (13849), 4573 states have internal predecessors, (13849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:10,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4574 states to 4574 states and 13849 transitions. [2021-10-16 03:10:10,834 INFO L78 Accepts]: Start accepts. Automaton has 4574 states and 13849 transitions. Word has length 38 [2021-10-16 03:10:10,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:10,835 INFO L470 AbstractCegarLoop]: Abstraction has 4574 states and 13849 transitions. [2021-10-16 03:10:10,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:10,835 INFO L276 IsEmpty]: Start isEmpty. Operand 4574 states and 13849 transitions. [2021-10-16 03:10:10,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:10,841 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:10,842 INFO L512 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] [2021-10-16 03:10:10,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-10-16 03:10:10,842 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:10,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:10,842 INFO L82 PathProgramCache]: Analyzing trace with hash -272517057, now seen corresponding path program 30 times [2021-10-16 03:10:10,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:10,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911289091] [2021-10-16 03:10:10,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:10,843 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:10,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:10,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:10,977 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:10,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911289091] [2021-10-16 03:10:10,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911289091] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:10,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:10,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:10:10,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501830730] [2021-10-16 03:10:10,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:10:10,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:10,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:10:10,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:10:10,980 INFO L87 Difference]: Start difference. First operand 4574 states and 13849 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:12,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:12,003 INFO L93 Difference]: Finished difference Result 7482 states and 22080 transitions. [2021-10-16 03:10:12,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-16 03:10:12,003 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:12,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:12,019 INFO L225 Difference]: With dead ends: 7482 [2021-10-16 03:10:12,019 INFO L226 Difference]: Without dead ends: 7474 [2021-10-16 03:10:12,020 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 410.3ms TimeCoverageRelationStatistics Valid=319, Invalid=1087, Unknown=0, NotChecked=0, Total=1406 [2021-10-16 03:10:12,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7474 states. [2021-10-16 03:10:12,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7474 to 4572. [2021-10-16 03:10:12,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4572 states, 4571 states have (on average 3.0286589367753227) internal successors, (13844), 4571 states have internal predecessors, (13844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:12,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4572 states to 4572 states and 13844 transitions. [2021-10-16 03:10:12,131 INFO L78 Accepts]: Start accepts. Automaton has 4572 states and 13844 transitions. Word has length 38 [2021-10-16 03:10:12,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:12,131 INFO L470 AbstractCegarLoop]: Abstraction has 4572 states and 13844 transitions. [2021-10-16 03:10:12,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:12,131 INFO L276 IsEmpty]: Start isEmpty. Operand 4572 states and 13844 transitions. [2021-10-16 03:10:12,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:12,138 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:12,138 INFO L512 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] [2021-10-16 03:10:12,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-10-16 03:10:12,139 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:12,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:12,139 INFO L82 PathProgramCache]: Analyzing trace with hash -934523677, now seen corresponding path program 31 times [2021-10-16 03:10:12,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:12,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205142711] [2021-10-16 03:10:12,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:12,139 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:12,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:12,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:12,311 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:12,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205142711] [2021-10-16 03:10:12,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205142711] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:12,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:12,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:10:12,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343625163] [2021-10-16 03:10:12,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:10:12,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:12,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:10:12,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:10:12,313 INFO L87 Difference]: Start difference. First operand 4572 states and 13844 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:13,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:13,253 INFO L93 Difference]: Finished difference Result 7142 states and 21136 transitions. [2021-10-16 03:10:13,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-16 03:10:13,253 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:13,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:13,268 INFO L225 Difference]: With dead ends: 7142 [2021-10-16 03:10:13,269 INFO L226 Difference]: Without dead ends: 7100 [2021-10-16 03:10:13,269 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 334.9ms TimeCoverageRelationStatistics Valid=245, Invalid=877, Unknown=0, NotChecked=0, Total=1122 [2021-10-16 03:10:13,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7100 states. [2021-10-16 03:10:13,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7100 to 4560. [2021-10-16 03:10:13,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4560 states, 4559 states have (on average 3.026321561745997) internal successors, (13797), 4559 states have internal predecessors, (13797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:13,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4560 states to 4560 states and 13797 transitions. [2021-10-16 03:10:13,398 INFO L78 Accepts]: Start accepts. Automaton has 4560 states and 13797 transitions. Word has length 38 [2021-10-16 03:10:13,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:13,399 INFO L470 AbstractCegarLoop]: Abstraction has 4560 states and 13797 transitions. [2021-10-16 03:10:13,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:13,399 INFO L276 IsEmpty]: Start isEmpty. Operand 4560 states and 13797 transitions. [2021-10-16 03:10:13,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:13,406 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:13,406 INFO L512 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] [2021-10-16 03:10:13,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-10-16 03:10:13,406 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:13,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:13,407 INFO L82 PathProgramCache]: Analyzing trace with hash -518553713, now seen corresponding path program 32 times [2021-10-16 03:10:13,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:13,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627668523] [2021-10-16 03:10:13,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:13,407 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:13,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:13,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:13,580 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:13,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627668523] [2021-10-16 03:10:13,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627668523] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:13,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:13,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:10:13,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85860418] [2021-10-16 03:10:13,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:10:13,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:13,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:10:13,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:10:13,582 INFO L87 Difference]: Start difference. First operand 4560 states and 13797 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:14,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:14,685 INFO L93 Difference]: Finished difference Result 7374 states and 21803 transitions. [2021-10-16 03:10:14,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-16 03:10:14,685 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:14,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:14,701 INFO L225 Difference]: With dead ends: 7374 [2021-10-16 03:10:14,701 INFO L226 Difference]: Without dead ends: 7352 [2021-10-16 03:10:14,702 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 409.3ms TimeCoverageRelationStatistics Valid=327, Invalid=1233, Unknown=0, NotChecked=0, Total=1560 [2021-10-16 03:10:14,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7352 states. [2021-10-16 03:10:14,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7352 to 4552. [2021-10-16 03:10:14,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4552 states, 4551 states have (on average 3.028125686662272) internal successors, (13781), 4551 states have internal predecessors, (13781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:14,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4552 states to 4552 states and 13781 transitions. [2021-10-16 03:10:14,811 INFO L78 Accepts]: Start accepts. Automaton has 4552 states and 13781 transitions. Word has length 38 [2021-10-16 03:10:14,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:14,811 INFO L470 AbstractCegarLoop]: Abstraction has 4552 states and 13781 transitions. [2021-10-16 03:10:14,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:14,811 INFO L276 IsEmpty]: Start isEmpty. Operand 4552 states and 13781 transitions. [2021-10-16 03:10:14,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:14,822 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:14,822 INFO L512 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] [2021-10-16 03:10:14,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-10-16 03:10:14,823 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:14,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:14,823 INFO L82 PathProgramCache]: Analyzing trace with hash 694436029, now seen corresponding path program 33 times [2021-10-16 03:10:14,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:14,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280241527] [2021-10-16 03:10:14,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:14,824 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:14,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:14,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:14,940 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:14,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280241527] [2021-10-16 03:10:14,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280241527] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:14,940 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:14,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-16 03:10:14,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133872673] [2021-10-16 03:10:14,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 03:10:14,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:14,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 03:10:14,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:10:14,942 INFO L87 Difference]: Start difference. First operand 4552 states and 13781 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:15,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:15,470 INFO L93 Difference]: Finished difference Result 7300 states and 21296 transitions. [2021-10-16 03:10:15,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-16 03:10:15,471 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:15,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:15,486 INFO L225 Difference]: With dead ends: 7300 [2021-10-16 03:10:15,486 INFO L226 Difference]: Without dead ends: 7258 [2021-10-16 03:10:15,487 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 186.0ms TimeCoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2021-10-16 03:10:15,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7258 states. [2021-10-16 03:10:15,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7258 to 4610. [2021-10-16 03:10:15,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4610 states, 4609 states have (on average 3.0136689086569755) internal successors, (13890), 4609 states have internal predecessors, (13890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:15,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 13890 transitions. [2021-10-16 03:10:15,597 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 13890 transitions. Word has length 38 [2021-10-16 03:10:15,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:15,597 INFO L470 AbstractCegarLoop]: Abstraction has 4610 states and 13890 transitions. [2021-10-16 03:10:15,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:15,598 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 13890 transitions. [2021-10-16 03:10:15,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:15,605 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:15,605 INFO L512 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] [2021-10-16 03:10:15,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-10-16 03:10:15,605 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:15,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:15,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1140250371, now seen corresponding path program 34 times [2021-10-16 03:10:15,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:15,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19092252] [2021-10-16 03:10:15,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:15,606 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:15,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:15,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:15,726 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:15,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19092252] [2021-10-16 03:10:15,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19092252] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:15,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:15,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:10:15,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011372193] [2021-10-16 03:10:15,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:10:15,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:15,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:10:15,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:10:15,729 INFO L87 Difference]: Start difference. First operand 4610 states and 13890 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:16,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:16,632 INFO L93 Difference]: Finished difference Result 7432 states and 21606 transitions. [2021-10-16 03:10:16,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-16 03:10:16,633 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:16,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:16,654 INFO L225 Difference]: With dead ends: 7432 [2021-10-16 03:10:16,655 INFO L226 Difference]: Without dead ends: 7400 [2021-10-16 03:10:16,656 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 330.1ms TimeCoverageRelationStatistics Valid=247, Invalid=875, Unknown=0, NotChecked=0, Total=1122 [2021-10-16 03:10:16,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7400 states. [2021-10-16 03:10:16,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7400 to 4590. [2021-10-16 03:10:16,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4590 states, 4589 states have (on average 3.0137284811505776) internal successors, (13830), 4589 states have internal predecessors, (13830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:16,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4590 states to 4590 states and 13830 transitions. [2021-10-16 03:10:16,817 INFO L78 Accepts]: Start accepts. Automaton has 4590 states and 13830 transitions. Word has length 38 [2021-10-16 03:10:16,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:16,817 INFO L470 AbstractCegarLoop]: Abstraction has 4590 states and 13830 transitions. [2021-10-16 03:10:16,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:16,818 INFO L276 IsEmpty]: Start isEmpty. Operand 4590 states and 13830 transitions. [2021-10-16 03:10:16,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:16,828 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:16,828 INFO L512 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] [2021-10-16 03:10:16,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-10-16 03:10:16,829 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:16,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:16,830 INFO L82 PathProgramCache]: Analyzing trace with hash -2134563991, now seen corresponding path program 35 times [2021-10-16 03:10:16,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:16,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973783245] [2021-10-16 03:10:16,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:16,831 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:16,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:16,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:16,980 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:16,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973783245] [2021-10-16 03:10:16,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973783245] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:16,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:16,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:10:16,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006160079] [2021-10-16 03:10:16,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:10:16,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:16,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:10:16,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:10:16,986 INFO L87 Difference]: Start difference. First operand 4590 states and 13830 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:17,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:17,596 INFO L93 Difference]: Finished difference Result 6442 states and 18800 transitions. [2021-10-16 03:10:17,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-16 03:10:17,597 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:17,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:17,610 INFO L225 Difference]: With dead ends: 6442 [2021-10-16 03:10:17,610 INFO L226 Difference]: Without dead ends: 6388 [2021-10-16 03:10:17,611 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 237.3ms TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2021-10-16 03:10:17,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6388 states. [2021-10-16 03:10:17,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6388 to 4610. [2021-10-16 03:10:17,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4610 states, 4609 states have (on average 3.00846170535908) internal successors, (13866), 4609 states have internal predecessors, (13866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:17,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 13866 transitions. [2021-10-16 03:10:17,715 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 13866 transitions. Word has length 38 [2021-10-16 03:10:17,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:17,716 INFO L470 AbstractCegarLoop]: Abstraction has 4610 states and 13866 transitions. [2021-10-16 03:10:17,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:17,716 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 13866 transitions. [2021-10-16 03:10:17,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:17,722 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:17,723 INFO L512 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] [2021-10-16 03:10:17,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-10-16 03:10:17,723 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:17,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:17,723 INFO L82 PathProgramCache]: Analyzing trace with hash -839458735, now seen corresponding path program 36 times [2021-10-16 03:10:17,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:17,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916669852] [2021-10-16 03:10:17,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:17,724 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:17,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:17,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:17,880 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:17,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916669852] [2021-10-16 03:10:17,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916669852] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:17,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:17,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:10:17,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932290431] [2021-10-16 03:10:17,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:10:17,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:17,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:10:17,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:10:17,882 INFO L87 Difference]: Start difference. First operand 4610 states and 13866 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:18,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:18,683 INFO L93 Difference]: Finished difference Result 7128 states and 20615 transitions. [2021-10-16 03:10:18,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-16 03:10:18,683 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:18,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:18,697 INFO L225 Difference]: With dead ends: 7128 [2021-10-16 03:10:18,697 INFO L226 Difference]: Without dead ends: 6746 [2021-10-16 03:10:18,698 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 259.9ms TimeCoverageRelationStatistics Valid=190, Invalid=740, Unknown=0, NotChecked=0, Total=930 [2021-10-16 03:10:18,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6746 states. [2021-10-16 03:10:18,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6746 to 4570. [2021-10-16 03:10:18,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4570 states, 4569 states have (on average 2.996935872182097) internal successors, (13693), 4569 states have internal predecessors, (13693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:18,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4570 states to 4570 states and 13693 transitions. [2021-10-16 03:10:18,802 INFO L78 Accepts]: Start accepts. Automaton has 4570 states and 13693 transitions. Word has length 38 [2021-10-16 03:10:18,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:18,802 INFO L470 AbstractCegarLoop]: Abstraction has 4570 states and 13693 transitions. [2021-10-16 03:10:18,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:18,802 INFO L276 IsEmpty]: Start isEmpty. Operand 4570 states and 13693 transitions. [2021-10-16 03:10:18,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:18,809 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:18,810 INFO L512 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] [2021-10-16 03:10:18,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-10-16 03:10:18,810 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:18,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:18,811 INFO L82 PathProgramCache]: Analyzing trace with hash -423488771, now seen corresponding path program 37 times [2021-10-16 03:10:18,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:18,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52696853] [2021-10-16 03:10:18,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:18,811 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:18,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:18,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:18,977 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:18,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52696853] [2021-10-16 03:10:18,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52696853] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:18,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:18,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:10:18,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409113680] [2021-10-16 03:10:18,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:10:18,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:18,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:10:18,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:10:18,980 INFO L87 Difference]: Start difference. First operand 4570 states and 13693 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:20,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:20,021 INFO L93 Difference]: Finished difference Result 6686 states and 19343 transitions. [2021-10-16 03:10:20,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-16 03:10:20,022 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:20,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:20,035 INFO L225 Difference]: With dead ends: 6686 [2021-10-16 03:10:20,035 INFO L226 Difference]: Without dead ends: 6606 [2021-10-16 03:10:20,036 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 354.9ms TimeCoverageRelationStatistics Valid=255, Invalid=1005, Unknown=0, NotChecked=0, Total=1260 [2021-10-16 03:10:20,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6606 states. [2021-10-16 03:10:20,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6606 to 4524. [2021-10-16 03:10:20,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4524 states, 4523 states have (on average 2.998673446827327) internal successors, (13563), 4523 states have internal predecessors, (13563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:20,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4524 states to 4524 states and 13563 transitions. [2021-10-16 03:10:20,177 INFO L78 Accepts]: Start accepts. Automaton has 4524 states and 13563 transitions. Word has length 38 [2021-10-16 03:10:20,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:20,177 INFO L470 AbstractCegarLoop]: Abstraction has 4524 states and 13563 transitions. [2021-10-16 03:10:20,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:20,178 INFO L276 IsEmpty]: Start isEmpty. Operand 4524 states and 13563 transitions. [2021-10-16 03:10:20,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:20,187 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:20,188 INFO L512 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] [2021-10-16 03:10:20,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-10-16 03:10:20,188 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:20,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:20,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1171765735, now seen corresponding path program 38 times [2021-10-16 03:10:20,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:20,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349699174] [2021-10-16 03:10:20,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:20,190 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:20,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:20,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:20,350 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:20,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349699174] [2021-10-16 03:10:20,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349699174] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:20,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:20,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:10:20,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857232259] [2021-10-16 03:10:20,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:10:20,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:20,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:10:20,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:10:20,352 INFO L87 Difference]: Start difference. First operand 4524 states and 13563 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:21,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:21,150 INFO L93 Difference]: Finished difference Result 6042 states and 17591 transitions. [2021-10-16 03:10:21,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-16 03:10:21,150 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:21,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:21,167 INFO L225 Difference]: With dead ends: 6042 [2021-10-16 03:10:21,167 INFO L226 Difference]: Without dead ends: 5900 [2021-10-16 03:10:21,168 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 271.8ms TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2021-10-16 03:10:21,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5900 states. [2021-10-16 03:10:21,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5900 to 4500. [2021-10-16 03:10:21,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4500 states, 4499 states have (on average 2.9997777283840854) internal successors, (13496), 4499 states have internal predecessors, (13496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:21,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4500 states to 4500 states and 13496 transitions. [2021-10-16 03:10:21,274 INFO L78 Accepts]: Start accepts. Automaton has 4500 states and 13496 transitions. Word has length 38 [2021-10-16 03:10:21,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:21,274 INFO L470 AbstractCegarLoop]: Abstraction has 4500 states and 13496 transitions. [2021-10-16 03:10:21,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:21,275 INFO L276 IsEmpty]: Start isEmpty. Operand 4500 states and 13496 transitions. [2021-10-16 03:10:21,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:21,283 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:21,283 INFO L512 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] [2021-10-16 03:10:21,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-10-16 03:10:21,284 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:21,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:21,284 INFO L82 PathProgramCache]: Analyzing trace with hash -821669551, now seen corresponding path program 39 times [2021-10-16 03:10:21,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:21,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439477181] [2021-10-16 03:10:21,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:21,285 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:21,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:21,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:21,390 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:21,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439477181] [2021-10-16 03:10:21,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439477181] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:21,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:21,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-16 03:10:21,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5577214] [2021-10-16 03:10:21,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 03:10:21,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:21,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 03:10:21,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:10:21,392 INFO L87 Difference]: Start difference. First operand 4500 states and 13496 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:21,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:21,918 INFO L93 Difference]: Finished difference Result 6794 states and 19908 transitions. [2021-10-16 03:10:21,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-16 03:10:21,919 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:21,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:21,935 INFO L225 Difference]: With dead ends: 6794 [2021-10-16 03:10:21,935 INFO L226 Difference]: Without dead ends: 6620 [2021-10-16 03:10:21,935 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 174.1ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-10-16 03:10:21,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6620 states. [2021-10-16 03:10:22,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6620 to 4646. [2021-10-16 03:10:22,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4646 states, 4645 states have (on average 2.994617868675996) internal successors, (13910), 4645 states have internal predecessors, (13910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:22,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4646 states to 4646 states and 13910 transitions. [2021-10-16 03:10:22,060 INFO L78 Accepts]: Start accepts. Automaton has 4646 states and 13910 transitions. Word has length 38 [2021-10-16 03:10:22,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:22,061 INFO L470 AbstractCegarLoop]: Abstraction has 4646 states and 13910 transitions. [2021-10-16 03:10:22,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:22,061 INFO L276 IsEmpty]: Start isEmpty. Operand 4646 states and 13910 transitions. [2021-10-16 03:10:22,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:22,067 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:22,067 INFO L512 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] [2021-10-16 03:10:22,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-10-16 03:10:22,068 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:22,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:22,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1592406527, now seen corresponding path program 40 times [2021-10-16 03:10:22,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:22,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067561452] [2021-10-16 03:10:22,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:22,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:22,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:22,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:22,183 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:22,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067561452] [2021-10-16 03:10:22,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067561452] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:22,183 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:22,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:10:22,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718891984] [2021-10-16 03:10:22,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:10:22,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:22,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:10:22,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:10:22,185 INFO L87 Difference]: Start difference. First operand 4646 states and 13910 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:22,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:22,888 INFO L93 Difference]: Finished difference Result 7428 states and 21632 transitions. [2021-10-16 03:10:22,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-16 03:10:22,889 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:22,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:22,903 INFO L225 Difference]: With dead ends: 7428 [2021-10-16 03:10:22,904 INFO L226 Difference]: Without dead ends: 7412 [2021-10-16 03:10:22,904 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 272.4ms TimeCoverageRelationStatistics Valid=266, Invalid=790, Unknown=0, NotChecked=0, Total=1056 [2021-10-16 03:10:22,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7412 states. [2021-10-16 03:10:22,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7412 to 4732. [2021-10-16 03:10:23,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4732 states, 4731 states have (on average 2.996618051151976) internal successors, (14177), 4731 states have internal predecessors, (14177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:23,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4732 states to 4732 states and 14177 transitions. [2021-10-16 03:10:23,014 INFO L78 Accepts]: Start accepts. Automaton has 4732 states and 14177 transitions. Word has length 38 [2021-10-16 03:10:23,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:23,014 INFO L470 AbstractCegarLoop]: Abstraction has 4732 states and 14177 transitions. [2021-10-16 03:10:23,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:23,015 INFO L276 IsEmpty]: Start isEmpty. Operand 4732 states and 14177 transitions. [2021-10-16 03:10:23,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:23,021 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:23,021 INFO L512 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] [2021-10-16 03:10:23,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-10-16 03:10:23,022 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:23,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:23,022 INFO L82 PathProgramCache]: Analyzing trace with hash -242279873, now seen corresponding path program 41 times [2021-10-16 03:10:23,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:23,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509868752] [2021-10-16 03:10:23,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:23,023 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:23,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:23,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:23,146 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:23,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509868752] [2021-10-16 03:10:23,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509868752] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:23,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:23,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:10:23,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65939451] [2021-10-16 03:10:23,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:10:23,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:23,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:10:23,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:10:23,149 INFO L87 Difference]: Start difference. First operand 4732 states and 14177 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:24,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:24,177 INFO L93 Difference]: Finished difference Result 7894 states and 22808 transitions. [2021-10-16 03:10:24,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-16 03:10:24,178 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:24,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:24,193 INFO L225 Difference]: With dead ends: 7894 [2021-10-16 03:10:24,193 INFO L226 Difference]: Without dead ends: 7862 [2021-10-16 03:10:24,194 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 433.6ms TimeCoverageRelationStatistics Valid=422, Invalid=1470, Unknown=0, NotChecked=0, Total=1892 [2021-10-16 03:10:24,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7862 states. [2021-10-16 03:10:24,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7862 to 4712. [2021-10-16 03:10:24,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4712 states, 4711 states have (on average 2.996603693483337) internal successors, (14117), 4711 states have internal predecessors, (14117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:24,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4712 states to 4712 states and 14117 transitions. [2021-10-16 03:10:24,308 INFO L78 Accepts]: Start accepts. Automaton has 4712 states and 14117 transitions. Word has length 38 [2021-10-16 03:10:24,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:24,308 INFO L470 AbstractCegarLoop]: Abstraction has 4712 states and 14117 transitions. [2021-10-16 03:10:24,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:24,309 INFO L276 IsEmpty]: Start isEmpty. Operand 4712 states and 14117 transitions. [2021-10-16 03:10:24,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:24,315 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:24,315 INFO L512 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] [2021-10-16 03:10:24,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-10-16 03:10:24,316 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:24,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:24,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1236593493, now seen corresponding path program 42 times [2021-10-16 03:10:24,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:24,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821424317] [2021-10-16 03:10:24,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:24,317 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:24,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:24,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:24,437 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:24,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821424317] [2021-10-16 03:10:24,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821424317] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:24,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:24,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:10:24,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094765197] [2021-10-16 03:10:24,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:10:24,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:24,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:10:24,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:10:24,439 INFO L87 Difference]: Start difference. First operand 4712 states and 14117 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:25,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:25,273 INFO L93 Difference]: Finished difference Result 6938 states and 20173 transitions. [2021-10-16 03:10:25,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-16 03:10:25,273 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:25,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:25,287 INFO L225 Difference]: With dead ends: 6938 [2021-10-16 03:10:25,287 INFO L226 Difference]: Without dead ends: 6886 [2021-10-16 03:10:25,288 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 367.6ms TimeCoverageRelationStatistics Valid=323, Invalid=1009, Unknown=0, NotChecked=0, Total=1332 [2021-10-16 03:10:25,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6886 states. [2021-10-16 03:10:25,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6886 to 4652. [2021-10-16 03:10:25,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4652 states, 4651 states have (on average 2.9974199096968395) internal successors, (13941), 4651 states have internal predecessors, (13941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:25,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4652 states to 4652 states and 13941 transitions. [2021-10-16 03:10:25,432 INFO L78 Accepts]: Start accepts. Automaton has 4652 states and 13941 transitions. Word has length 38 [2021-10-16 03:10:25,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:25,432 INFO L470 AbstractCegarLoop]: Abstraction has 4652 states and 13941 transitions. [2021-10-16 03:10:25,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:25,432 INFO L276 IsEmpty]: Start isEmpty. Operand 4652 states and 13941 transitions. [2021-10-16 03:10:25,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:25,440 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:25,440 INFO L512 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] [2021-10-16 03:10:25,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-10-16 03:10:25,440 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:25,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:25,441 INFO L82 PathProgramCache]: Analyzing trace with hash -315494859, now seen corresponding path program 43 times [2021-10-16 03:10:25,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:25,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113899615] [2021-10-16 03:10:25,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:25,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:25,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:25,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:25,569 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:25,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113899615] [2021-10-16 03:10:25,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113899615] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:25,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:25,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:10:25,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879878089] [2021-10-16 03:10:25,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:10:25,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:25,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:10:25,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:10:25,572 INFO L87 Difference]: Start difference. First operand 4652 states and 13941 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:26,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:26,085 INFO L93 Difference]: Finished difference Result 6444 states and 19056 transitions. [2021-10-16 03:10:26,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-16 03:10:26,086 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:26,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:26,099 INFO L225 Difference]: With dead ends: 6444 [2021-10-16 03:10:26,099 INFO L226 Difference]: Without dead ends: 6420 [2021-10-16 03:10:26,100 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 209.8ms TimeCoverageRelationStatistics Valid=196, Invalid=616, Unknown=0, NotChecked=0, Total=812 [2021-10-16 03:10:26,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6420 states. [2021-10-16 03:10:26,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6420 to 4656. [2021-10-16 03:10:26,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4656 states, 4655 states have (on average 2.9969924812030073) internal successors, (13951), 4655 states have internal predecessors, (13951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:26,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4656 states to 4656 states and 13951 transitions. [2021-10-16 03:10:26,197 INFO L78 Accepts]: Start accepts. Automaton has 4656 states and 13951 transitions. Word has length 38 [2021-10-16 03:10:26,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:26,197 INFO L470 AbstractCegarLoop]: Abstraction has 4656 states and 13951 transitions. [2021-10-16 03:10:26,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:26,197 INFO L276 IsEmpty]: Start isEmpty. Operand 4656 states and 13951 transitions. [2021-10-16 03:10:26,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:26,204 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:26,204 INFO L512 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] [2021-10-16 03:10:26,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-10-16 03:10:26,205 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:26,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:26,205 INFO L82 PathProgramCache]: Analyzing trace with hash -635995399, now seen corresponding path program 44 times [2021-10-16 03:10:26,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:26,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914866306] [2021-10-16 03:10:26,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:26,205 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:26,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:26,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:26,335 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:26,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914866306] [2021-10-16 03:10:26,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914866306] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:26,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:26,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-16 03:10:26,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894468763] [2021-10-16 03:10:26,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-16 03:10:26,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:26,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-16 03:10:26,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-10-16 03:10:26,337 INFO L87 Difference]: Start difference. First operand 4656 states and 13951 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:27,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:27,160 INFO L93 Difference]: Finished difference Result 7090 states and 20504 transitions. [2021-10-16 03:10:27,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-16 03:10:27,161 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:27,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:27,174 INFO L225 Difference]: With dead ends: 7090 [2021-10-16 03:10:27,174 INFO L226 Difference]: Without dead ends: 7016 [2021-10-16 03:10:27,175 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 324.8ms TimeCoverageRelationStatistics Valid=329, Invalid=1153, Unknown=0, NotChecked=0, Total=1482 [2021-10-16 03:10:27,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7016 states. [2021-10-16 03:10:27,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7016 to 4770. [2021-10-16 03:10:27,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4770 states, 4769 states have (on average 2.9939190605997066) internal successors, (14278), 4769 states have internal predecessors, (14278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:27,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4770 states to 4770 states and 14278 transitions. [2021-10-16 03:10:27,280 INFO L78 Accepts]: Start accepts. Automaton has 4770 states and 14278 transitions. Word has length 38 [2021-10-16 03:10:27,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:27,281 INFO L470 AbstractCegarLoop]: Abstraction has 4770 states and 14278 transitions. [2021-10-16 03:10:27,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:27,281 INFO L276 IsEmpty]: Start isEmpty. Operand 4770 states and 14278 transitions. [2021-10-16 03:10:27,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:27,287 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:27,288 INFO L512 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] [2021-10-16 03:10:27,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-10-16 03:10:27,288 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:27,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:27,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1716982443, now seen corresponding path program 45 times [2021-10-16 03:10:27,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:27,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719004806] [2021-10-16 03:10:27,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:27,289 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:27,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:27,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:27,379 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:27,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719004806] [2021-10-16 03:10:27,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719004806] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:27,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:27,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-16 03:10:27,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347365499] [2021-10-16 03:10:27,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-16 03:10:27,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:27,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-16 03:10:27,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-16 03:10:27,381 INFO L87 Difference]: Start difference. First operand 4770 states and 14278 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:27,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:27,773 INFO L93 Difference]: Finished difference Result 6436 states and 18904 transitions. [2021-10-16 03:10:27,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-16 03:10:27,774 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:27,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:27,787 INFO L225 Difference]: With dead ends: 6436 [2021-10-16 03:10:27,787 INFO L226 Difference]: Without dead ends: 6432 [2021-10-16 03:10:27,788 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 149.5ms TimeCoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2021-10-16 03:10:27,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6432 states. [2021-10-16 03:10:27,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6432 to 4830. [2021-10-16 03:10:27,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4830 states, 4829 states have (on average 2.9832263408573203) internal successors, (14406), 4829 states have internal predecessors, (14406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:27,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4830 states to 4830 states and 14406 transitions. [2021-10-16 03:10:27,891 INFO L78 Accepts]: Start accepts. Automaton has 4830 states and 14406 transitions. Word has length 38 [2021-10-16 03:10:27,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:27,891 INFO L470 AbstractCegarLoop]: Abstraction has 4830 states and 14406 transitions. [2021-10-16 03:10:27,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:27,891 INFO L276 IsEmpty]: Start isEmpty. Operand 4830 states and 14406 transitions. [2021-10-16 03:10:27,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:27,898 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:27,898 INFO L512 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] [2021-10-16 03:10:27,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-10-16 03:10:27,899 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:27,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:27,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1692083485, now seen corresponding path program 46 times [2021-10-16 03:10:27,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:27,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320409701] [2021-10-16 03:10:27,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:27,900 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:27,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:28,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:28,028 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:28,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320409701] [2021-10-16 03:10:28,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320409701] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:28,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:28,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:10:28,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651631299] [2021-10-16 03:10:28,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:10:28,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:28,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:10:28,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:10:28,030 INFO L87 Difference]: Start difference. First operand 4830 states and 14406 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:29,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:29,069 INFO L93 Difference]: Finished difference Result 7552 states and 21793 transitions. [2021-10-16 03:10:29,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-16 03:10:29,070 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:29,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:29,091 INFO L225 Difference]: With dead ends: 7552 [2021-10-16 03:10:29,091 INFO L226 Difference]: Without dead ends: 7484 [2021-10-16 03:10:29,093 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 358.8ms TimeCoverageRelationStatistics Valid=275, Invalid=915, Unknown=0, NotChecked=0, Total=1190 [2021-10-16 03:10:29,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7484 states. [2021-10-16 03:10:29,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7484 to 4878. [2021-10-16 03:10:29,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4878 states, 4877 states have (on average 2.9766249743694893) internal successors, (14517), 4877 states have internal predecessors, (14517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:29,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4878 states to 4878 states and 14517 transitions. [2021-10-16 03:10:29,255 INFO L78 Accepts]: Start accepts. Automaton has 4878 states and 14517 transitions. Word has length 38 [2021-10-16 03:10:29,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:29,256 INFO L470 AbstractCegarLoop]: Abstraction has 4878 states and 14517 transitions. [2021-10-16 03:10:29,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:29,256 INFO L276 IsEmpty]: Start isEmpty. Operand 4878 states and 14517 transitions. [2021-10-16 03:10:29,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:29,263 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:29,263 INFO L512 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] [2021-10-16 03:10:29,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-10-16 03:10:29,264 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:29,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:29,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1276113521, now seen corresponding path program 47 times [2021-10-16 03:10:29,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:29,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593012666] [2021-10-16 03:10:29,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:29,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:29,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:29,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:29,408 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:29,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593012666] [2021-10-16 03:10:29,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593012666] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:29,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:29,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-16 03:10:29,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159354739] [2021-10-16 03:10:29,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-16 03:10:29,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:29,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-16 03:10:29,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-10-16 03:10:29,410 INFO L87 Difference]: Start difference. First operand 4878 states and 14517 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:30,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:30,446 INFO L93 Difference]: Finished difference Result 7946 states and 22788 transitions. [2021-10-16 03:10:30,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-16 03:10:30,446 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:30,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:30,462 INFO L225 Difference]: With dead ends: 7946 [2021-10-16 03:10:30,462 INFO L226 Difference]: Without dead ends: 7824 [2021-10-16 03:10:30,465 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 429.0ms TimeCoverageRelationStatistics Valid=430, Invalid=1640, Unknown=0, NotChecked=0, Total=2070 [2021-10-16 03:10:30,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7824 states. [2021-10-16 03:10:30,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7824 to 4704. [2021-10-16 03:10:30,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4704 states, 4703 states have (on average 2.984477992770572) internal successors, (14036), 4703 states have internal predecessors, (14036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:30,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4704 states to 4704 states and 14036 transitions. [2021-10-16 03:10:30,581 INFO L78 Accepts]: Start accepts. Automaton has 4704 states and 14036 transitions. Word has length 38 [2021-10-16 03:10:30,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:30,582 INFO L470 AbstractCegarLoop]: Abstraction has 4704 states and 14036 transitions. [2021-10-16 03:10:30,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:30,582 INFO L276 IsEmpty]: Start isEmpty. Operand 4704 states and 14036 transitions. [2021-10-16 03:10:30,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:30,618 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:30,618 INFO L512 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] [2021-10-16 03:10:30,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-10-16 03:10:30,618 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:30,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:30,619 INFO L82 PathProgramCache]: Analyzing trace with hash 615746949, now seen corresponding path program 48 times [2021-10-16 03:10:30,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:30,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102119500] [2021-10-16 03:10:30,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:30,619 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:30,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:30,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:30,754 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:30,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102119500] [2021-10-16 03:10:30,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102119500] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:30,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:30,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-16 03:10:30,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600701043] [2021-10-16 03:10:30,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-16 03:10:30,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:30,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-16 03:10:30,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-10-16 03:10:30,756 INFO L87 Difference]: Start difference. First operand 4704 states and 14036 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:31,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:31,655 INFO L93 Difference]: Finished difference Result 6598 states and 19271 transitions. [2021-10-16 03:10:31,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-16 03:10:31,656 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:31,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:31,675 INFO L225 Difference]: With dead ends: 6598 [2021-10-16 03:10:31,676 INFO L226 Difference]: Without dead ends: 6526 [2021-10-16 03:10:31,679 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 302.7ms TimeCoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2021-10-16 03:10:31,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6526 states. [2021-10-16 03:10:31,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6526 to 4694. [2021-10-16 03:10:31,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4694 states, 4693 states have (on average 2.987428084380993) internal successors, (14020), 4693 states have internal predecessors, (14020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:31,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4694 states to 4694 states and 14020 transitions. [2021-10-16 03:10:31,829 INFO L78 Accepts]: Start accepts. Automaton has 4694 states and 14020 transitions. Word has length 38 [2021-10-16 03:10:31,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:31,830 INFO L470 AbstractCegarLoop]: Abstraction has 4694 states and 14020 transitions. [2021-10-16 03:10:31,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:31,830 INFO L276 IsEmpty]: Start isEmpty. Operand 4694 states and 14020 transitions. [2021-10-16 03:10:31,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:31,841 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:31,841 INFO L512 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] [2021-10-16 03:10:31,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-10-16 03:10:31,841 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:31,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:31,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1844068427, now seen corresponding path program 49 times [2021-10-16 03:10:31,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:31,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214144748] [2021-10-16 03:10:31,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:31,843 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:31,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:31,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:31,954 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:31,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214144748] [2021-10-16 03:10:31,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214144748] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:31,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:31,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-16 03:10:31,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839489992] [2021-10-16 03:10:31,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-16 03:10:31,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:31,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-16 03:10:31,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-16 03:10:31,956 INFO L87 Difference]: Start difference. First operand 4694 states and 14020 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:32,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:32,491 INFO L93 Difference]: Finished difference Result 6614 states and 19300 transitions. [2021-10-16 03:10:32,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-16 03:10:32,491 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:32,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:32,507 INFO L225 Difference]: With dead ends: 6614 [2021-10-16 03:10:32,508 INFO L226 Difference]: Without dead ends: 6384 [2021-10-16 03:10:32,508 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 151.7ms TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-10-16 03:10:32,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6384 states. [2021-10-16 03:10:32,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6384 to 4918. [2021-10-16 03:10:32,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4918 states, 4917 states have (on average 2.9825096603620094) internal successors, (14665), 4917 states have internal predecessors, (14665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:32,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4918 states to 4918 states and 14665 transitions. [2021-10-16 03:10:32,610 INFO L78 Accepts]: Start accepts. Automaton has 4918 states and 14665 transitions. Word has length 38 [2021-10-16 03:10:32,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:32,610 INFO L470 AbstractCegarLoop]: Abstraction has 4918 states and 14665 transitions. [2021-10-16 03:10:32,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:32,611 INFO L276 IsEmpty]: Start isEmpty. Operand 4918 states and 14665 transitions. [2021-10-16 03:10:32,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:32,621 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:32,621 INFO L512 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] [2021-10-16 03:10:32,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-10-16 03:10:32,621 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:32,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:32,622 INFO L82 PathProgramCache]: Analyzing trace with hash -548174967, now seen corresponding path program 50 times [2021-10-16 03:10:32,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:32,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738813237] [2021-10-16 03:10:32,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:32,622 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:32,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:32,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:32,739 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:32,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738813237] [2021-10-16 03:10:32,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738813237] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:32,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:32,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:10:32,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215922854] [2021-10-16 03:10:32,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:10:32,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:32,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:10:32,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:10:32,741 INFO L87 Difference]: Start difference. First operand 4918 states and 14665 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:33,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:33,265 INFO L93 Difference]: Finished difference Result 6736 states and 19460 transitions. [2021-10-16 03:10:33,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-16 03:10:33,265 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:33,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:33,280 INFO L225 Difference]: With dead ends: 6736 [2021-10-16 03:10:33,280 INFO L226 Difference]: Without dead ends: 6700 [2021-10-16 03:10:33,280 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 208.9ms TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2021-10-16 03:10:33,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6700 states. [2021-10-16 03:10:33,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6700 to 4980. [2021-10-16 03:10:33,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4980 states, 4979 states have (on average 2.9785097409118295) internal successors, (14830), 4979 states have internal predecessors, (14830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:33,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4980 states to 4980 states and 14830 transitions. [2021-10-16 03:10:33,394 INFO L78 Accepts]: Start accepts. Automaton has 4980 states and 14830 transitions. Word has length 38 [2021-10-16 03:10:33,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:33,394 INFO L470 AbstractCegarLoop]: Abstraction has 4980 states and 14830 transitions. [2021-10-16 03:10:33,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:33,394 INFO L276 IsEmpty]: Start isEmpty. Operand 4980 states and 14830 transitions. [2021-10-16 03:10:33,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:33,402 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:33,402 INFO L512 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] [2021-10-16 03:10:33,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-10-16 03:10:33,402 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:33,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:33,403 INFO L82 PathProgramCache]: Analyzing trace with hash -41110603, now seen corresponding path program 51 times [2021-10-16 03:10:33,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:33,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115490877] [2021-10-16 03:10:33,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:33,403 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:33,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:33,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:33,542 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:33,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115490877] [2021-10-16 03:10:33,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115490877] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:33,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:33,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-16 03:10:33,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356182006] [2021-10-16 03:10:33,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 03:10:33,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:33,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 03:10:33,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:10:33,544 INFO L87 Difference]: Start difference. First operand 4980 states and 14830 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:34,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:34,270 INFO L93 Difference]: Finished difference Result 7288 states and 21125 transitions. [2021-10-16 03:10:34,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-16 03:10:34,270 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:34,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:34,285 INFO L225 Difference]: With dead ends: 7288 [2021-10-16 03:10:34,285 INFO L226 Difference]: Without dead ends: 7272 [2021-10-16 03:10:34,285 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 223.5ms TimeCoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2021-10-16 03:10:34,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7272 states. [2021-10-16 03:10:34,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7272 to 5050. [2021-10-16 03:10:34,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5050 states, 5049 states have (on average 2.982570806100218) internal successors, (15059), 5049 states have internal predecessors, (15059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:34,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5050 states to 5050 states and 15059 transitions. [2021-10-16 03:10:34,400 INFO L78 Accepts]: Start accepts. Automaton has 5050 states and 15059 transitions. Word has length 38 [2021-10-16 03:10:34,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:34,400 INFO L470 AbstractCegarLoop]: Abstraction has 5050 states and 15059 transitions. [2021-10-16 03:10:34,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:34,400 INFO L276 IsEmpty]: Start isEmpty. Operand 5050 states and 15059 transitions. [2021-10-16 03:10:34,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:34,407 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:34,407 INFO L512 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] [2021-10-16 03:10:34,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-10-16 03:10:34,408 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:34,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:34,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1111924439, now seen corresponding path program 52 times [2021-10-16 03:10:34,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:34,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541832840] [2021-10-16 03:10:34,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:34,409 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:34,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:34,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:34,523 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:34,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541832840] [2021-10-16 03:10:34,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541832840] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:34,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:34,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:10:34,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701450158] [2021-10-16 03:10:34,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:10:34,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:34,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:10:34,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:10:34,526 INFO L87 Difference]: Start difference. First operand 5050 states and 15059 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:35,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:35,491 INFO L93 Difference]: Finished difference Result 7660 states and 22070 transitions. [2021-10-16 03:10:35,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-16 03:10:35,492 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:35,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:35,514 INFO L225 Difference]: With dead ends: 7660 [2021-10-16 03:10:35,514 INFO L226 Difference]: Without dead ends: 7614 [2021-10-16 03:10:35,515 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 336.8ms TimeCoverageRelationStatistics Valid=247, Invalid=875, Unknown=0, NotChecked=0, Total=1122 [2021-10-16 03:10:35,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7614 states. [2021-10-16 03:10:35,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7614 to 5018. [2021-10-16 03:10:35,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5018 states, 5017 states have (on average 2.98564879410006) internal successors, (14979), 5017 states have internal predecessors, (14979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:35,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 14979 transitions. [2021-10-16 03:10:35,678 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 14979 transitions. Word has length 38 [2021-10-16 03:10:35,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:35,678 INFO L470 AbstractCegarLoop]: Abstraction has 5018 states and 14979 transitions. [2021-10-16 03:10:35,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:35,678 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 14979 transitions. [2021-10-16 03:10:35,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:35,686 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:35,686 INFO L512 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] [2021-10-16 03:10:35,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-10-16 03:10:35,686 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:35,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:35,686 INFO L82 PathProgramCache]: Analyzing trace with hash -640692307, now seen corresponding path program 53 times [2021-10-16 03:10:35,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:35,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552705022] [2021-10-16 03:10:35,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:35,687 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:35,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:35,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:35,847 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:35,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552705022] [2021-10-16 03:10:35,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552705022] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:35,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:35,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:10:35,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025229571] [2021-10-16 03:10:35,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:10:35,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:35,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:10:35,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:10:35,849 INFO L87 Difference]: Start difference. First operand 5018 states and 14979 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:36,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:36,803 INFO L93 Difference]: Finished difference Result 6694 states and 19085 transitions. [2021-10-16 03:10:36,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-16 03:10:36,804 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:36,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:36,816 INFO L225 Difference]: With dead ends: 6694 [2021-10-16 03:10:36,817 INFO L226 Difference]: Without dead ends: 6402 [2021-10-16 03:10:36,817 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 306.3ms TimeCoverageRelationStatistics Valid=198, Invalid=732, Unknown=0, NotChecked=0, Total=930 [2021-10-16 03:10:36,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6402 states. [2021-10-16 03:10:36,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6402 to 4908. [2021-10-16 03:10:36,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4908 states, 4907 states have (on average 2.9720807010393315) internal successors, (14584), 4907 states have internal predecessors, (14584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:36,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4908 states to 4908 states and 14584 transitions. [2021-10-16 03:10:36,918 INFO L78 Accepts]: Start accepts. Automaton has 4908 states and 14584 transitions. Word has length 38 [2021-10-16 03:10:36,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:36,918 INFO L470 AbstractCegarLoop]: Abstraction has 4908 states and 14584 transitions. [2021-10-16 03:10:36,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:36,918 INFO L276 IsEmpty]: Start isEmpty. Operand 4908 states and 14584 transitions. [2021-10-16 03:10:36,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:36,926 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:36,926 INFO L512 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] [2021-10-16 03:10:36,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-10-16 03:10:36,927 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:36,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:36,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1960812979, now seen corresponding path program 54 times [2021-10-16 03:10:36,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:36,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206325634] [2021-10-16 03:10:36,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:36,927 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:36,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:37,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:37,069 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:37,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206325634] [2021-10-16 03:10:37,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206325634] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:37,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:37,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:10:37,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111136503] [2021-10-16 03:10:37,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:10:37,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:37,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:10:37,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:10:37,071 INFO L87 Difference]: Start difference. First operand 4908 states and 14584 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:37,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:37,737 INFO L93 Difference]: Finished difference Result 6496 states and 18626 transitions. [2021-10-16 03:10:37,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-16 03:10:37,738 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:37,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:37,751 INFO L225 Difference]: With dead ends: 6496 [2021-10-16 03:10:37,752 INFO L226 Difference]: Without dead ends: 6452 [2021-10-16 03:10:37,752 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 222.9ms TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2021-10-16 03:10:37,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6452 states. [2021-10-16 03:10:37,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6452 to 4960. [2021-10-16 03:10:37,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4960 states, 4959 states have (on average 2.9751966122202056) internal successors, (14754), 4959 states have internal predecessors, (14754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:37,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4960 states to 4960 states and 14754 transitions. [2021-10-16 03:10:37,856 INFO L78 Accepts]: Start accepts. Automaton has 4960 states and 14754 transitions. Word has length 38 [2021-10-16 03:10:37,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:37,856 INFO L470 AbstractCegarLoop]: Abstraction has 4960 states and 14754 transitions. [2021-10-16 03:10:37,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:37,856 INFO L276 IsEmpty]: Start isEmpty. Operand 4960 states and 14754 transitions. [2021-10-16 03:10:37,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:37,863 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:37,864 INFO L512 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] [2021-10-16 03:10:37,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-10-16 03:10:37,864 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:37,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:37,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1286425769, now seen corresponding path program 55 times [2021-10-16 03:10:37,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:37,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276915552] [2021-10-16 03:10:37,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:37,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:37,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:38,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:38,013 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:38,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276915552] [2021-10-16 03:10:38,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276915552] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:38,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:38,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:10:38,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689829095] [2021-10-16 03:10:38,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:10:38,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:38,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:10:38,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:10:38,014 INFO L87 Difference]: Start difference. First operand 4960 states and 14754 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:38,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:38,918 INFO L93 Difference]: Finished difference Result 6790 states and 19347 transitions. [2021-10-16 03:10:38,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-16 03:10:38,918 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:38,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:38,932 INFO L225 Difference]: With dead ends: 6790 [2021-10-16 03:10:38,932 INFO L226 Difference]: Without dead ends: 6754 [2021-10-16 03:10:38,933 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 307.4ms TimeCoverageRelationStatistics Valid=255, Invalid=1005, Unknown=0, NotChecked=0, Total=1260 [2021-10-16 03:10:38,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6754 states. [2021-10-16 03:10:39,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6754 to 4952. [2021-10-16 03:10:39,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4952 states, 4951 states have (on average 2.976368410422137) internal successors, (14736), 4951 states have internal predecessors, (14736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:39,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4952 states to 4952 states and 14736 transitions. [2021-10-16 03:10:39,041 INFO L78 Accepts]: Start accepts. Automaton has 4952 states and 14736 transitions. Word has length 38 [2021-10-16 03:10:39,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:39,041 INFO L470 AbstractCegarLoop]: Abstraction has 4952 states and 14736 transitions. [2021-10-16 03:10:39,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:39,041 INFO L276 IsEmpty]: Start isEmpty. Operand 4952 states and 14736 transitions. [2021-10-16 03:10:39,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:39,049 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:39,049 INFO L512 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] [2021-10-16 03:10:39,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-10-16 03:10:39,049 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:39,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:39,050 INFO L82 PathProgramCache]: Analyzing trace with hash -998825361, now seen corresponding path program 56 times [2021-10-16 03:10:39,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:39,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97331575] [2021-10-16 03:10:39,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:39,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:39,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:39,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:39,193 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:39,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97331575] [2021-10-16 03:10:39,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97331575] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:39,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:39,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-16 03:10:39,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615522916] [2021-10-16 03:10:39,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 03:10:39,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:39,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 03:10:39,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:10:39,195 INFO L87 Difference]: Start difference. First operand 4952 states and 14736 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:39,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:39,934 INFO L93 Difference]: Finished difference Result 7096 states and 20507 transitions. [2021-10-16 03:10:39,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-16 03:10:39,934 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:39,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:39,949 INFO L225 Difference]: With dead ends: 7096 [2021-10-16 03:10:39,949 INFO L226 Difference]: Without dead ends: 7088 [2021-10-16 03:10:39,949 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 247.1ms TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2021-10-16 03:10:39,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7088 states. [2021-10-16 03:10:40,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7088 to 4970. [2021-10-16 03:10:40,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4970 states, 4969 states have (on average 2.975045280740592) internal successors, (14783), 4969 states have internal predecessors, (14783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:40,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4970 states to 4970 states and 14783 transitions. [2021-10-16 03:10:40,066 INFO L78 Accepts]: Start accepts. Automaton has 4970 states and 14783 transitions. Word has length 38 [2021-10-16 03:10:40,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:40,066 INFO L470 AbstractCegarLoop]: Abstraction has 4970 states and 14783 transitions. [2021-10-16 03:10:40,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:40,066 INFO L276 IsEmpty]: Start isEmpty. Operand 4970 states and 14783 transitions. [2021-10-16 03:10:40,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:40,073 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:40,074 INFO L512 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] [2021-10-16 03:10:40,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-10-16 03:10:40,074 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:40,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:40,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1395251987, now seen corresponding path program 57 times [2021-10-16 03:10:40,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:40,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44867078] [2021-10-16 03:10:40,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:40,075 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:40,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:40,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:40,231 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:40,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44867078] [2021-10-16 03:10:40,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44867078] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:40,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:40,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:10:40,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425361048] [2021-10-16 03:10:40,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:10:40,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:40,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:10:40,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:10:40,233 INFO L87 Difference]: Start difference. First operand 4970 states and 14783 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:41,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:41,003 INFO L93 Difference]: Finished difference Result 7182 states and 20698 transitions. [2021-10-16 03:10:41,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-16 03:10:41,003 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:41,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:41,018 INFO L225 Difference]: With dead ends: 7182 [2021-10-16 03:10:41,019 INFO L226 Difference]: Without dead ends: 7148 [2021-10-16 03:10:41,019 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 283.1ms TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2021-10-16 03:10:41,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7148 states. [2021-10-16 03:10:41,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7148 to 4966. [2021-10-16 03:10:41,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4966 states, 4965 states have (on average 2.9750251762336353) internal successors, (14771), 4965 states have internal predecessors, (14771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:41,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4966 states to 4966 states and 14771 transitions. [2021-10-16 03:10:41,139 INFO L78 Accepts]: Start accepts. Automaton has 4966 states and 14771 transitions. Word has length 38 [2021-10-16 03:10:41,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:41,139 INFO L470 AbstractCegarLoop]: Abstraction has 4966 states and 14771 transitions. [2021-10-16 03:10:41,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:41,140 INFO L276 IsEmpty]: Start isEmpty. Operand 4966 states and 14771 transitions. [2021-10-16 03:10:41,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:41,147 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:41,147 INFO L512 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] [2021-10-16 03:10:41,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-10-16 03:10:41,147 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:41,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:41,148 INFO L82 PathProgramCache]: Analyzing trace with hash -429992391, now seen corresponding path program 58 times [2021-10-16 03:10:41,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:41,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340851355] [2021-10-16 03:10:41,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:41,148 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:41,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:41,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:41,287 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:41,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340851355] [2021-10-16 03:10:41,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340851355] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:41,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:41,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-16 03:10:41,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720815081] [2021-10-16 03:10:41,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 03:10:41,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:41,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 03:10:41,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:10:41,289 INFO L87 Difference]: Start difference. First operand 4966 states and 14771 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:42,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:42,016 INFO L93 Difference]: Finished difference Result 7298 states and 21223 transitions. [2021-10-16 03:10:42,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-16 03:10:42,017 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:42,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:42,033 INFO L225 Difference]: With dead ends: 7298 [2021-10-16 03:10:42,033 INFO L226 Difference]: Without dead ends: 7290 [2021-10-16 03:10:42,033 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 269.9ms TimeCoverageRelationStatistics Valid=237, Invalid=755, Unknown=0, NotChecked=0, Total=992 [2021-10-16 03:10:42,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7290 states. [2021-10-16 03:10:42,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7290 to 4968. [2021-10-16 03:10:42,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4968 states, 4967 states have (on average 2.9744312462250857) internal successors, (14774), 4967 states have internal predecessors, (14774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:42,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4968 states to 4968 states and 14774 transitions. [2021-10-16 03:10:42,205 INFO L78 Accepts]: Start accepts. Automaton has 4968 states and 14774 transitions. Word has length 38 [2021-10-16 03:10:42,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:42,205 INFO L470 AbstractCegarLoop]: Abstraction has 4968 states and 14774 transitions. [2021-10-16 03:10:42,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:42,206 INFO L276 IsEmpty]: Start isEmpty. Operand 4968 states and 14774 transitions. [2021-10-16 03:10:42,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:42,213 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:42,213 INFO L512 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] [2021-10-16 03:10:42,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-10-16 03:10:42,214 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:42,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:42,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1500806227, now seen corresponding path program 59 times [2021-10-16 03:10:42,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:42,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109468106] [2021-10-16 03:10:42,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:42,215 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:42,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:42,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:42,330 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:42,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109468106] [2021-10-16 03:10:42,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109468106] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:42,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:42,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:10:42,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305134804] [2021-10-16 03:10:42,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:10:42,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:42,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:10:42,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:10:42,332 INFO L87 Difference]: Start difference. First operand 4968 states and 14774 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:43,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:43,250 INFO L93 Difference]: Finished difference Result 7604 states and 22051 transitions. [2021-10-16 03:10:43,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-16 03:10:43,251 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:43,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:43,270 INFO L225 Difference]: With dead ends: 7604 [2021-10-16 03:10:43,271 INFO L226 Difference]: Without dead ends: 7596 [2021-10-16 03:10:43,271 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 362.3ms TimeCoverageRelationStatistics Valid=319, Invalid=1087, Unknown=0, NotChecked=0, Total=1406 [2021-10-16 03:10:43,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7596 states. [2021-10-16 03:10:43,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7596 to 4966. [2021-10-16 03:10:43,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4966 states, 4965 states have (on average 2.9746223564954684) internal successors, (14769), 4965 states have internal predecessors, (14769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:43,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4966 states to 4966 states and 14769 transitions. [2021-10-16 03:10:43,391 INFO L78 Accepts]: Start accepts. Automaton has 4966 states and 14769 transitions. Word has length 38 [2021-10-16 03:10:43,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:43,391 INFO L470 AbstractCegarLoop]: Abstraction has 4966 states and 14769 transitions. [2021-10-16 03:10:43,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:43,391 INFO L276 IsEmpty]: Start isEmpty. Operand 4966 states and 14769 transitions. [2021-10-16 03:10:43,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:43,399 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:43,399 INFO L512 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] [2021-10-16 03:10:43,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-10-16 03:10:43,399 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:43,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:43,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1664448531, now seen corresponding path program 60 times [2021-10-16 03:10:43,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:43,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115988713] [2021-10-16 03:10:43,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:43,401 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:43,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:43,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:43,558 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:43,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115988713] [2021-10-16 03:10:43,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115988713] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:43,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:43,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:10:43,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240508481] [2021-10-16 03:10:43,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:10:43,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:43,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:10:43,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:10:43,559 INFO L87 Difference]: Start difference. First operand 4966 states and 14769 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:44,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:44,645 INFO L93 Difference]: Finished difference Result 7288 states and 21201 transitions. [2021-10-16 03:10:44,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-16 03:10:44,646 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:44,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:44,662 INFO L225 Difference]: With dead ends: 7288 [2021-10-16 03:10:44,662 INFO L226 Difference]: Without dead ends: 7256 [2021-10-16 03:10:44,662 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 365.7ms TimeCoverageRelationStatistics Valid=245, Invalid=877, Unknown=0, NotChecked=0, Total=1122 [2021-10-16 03:10:44,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7256 states. [2021-10-16 03:10:44,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7256 to 4960. [2021-10-16 03:10:44,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4960 states, 4959 states have (on average 2.9731800766283527) internal successors, (14744), 4959 states have internal predecessors, (14744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:44,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4960 states to 4960 states and 14744 transitions. [2021-10-16 03:10:44,780 INFO L78 Accepts]: Start accepts. Automaton has 4960 states and 14744 transitions. Word has length 38 [2021-10-16 03:10:44,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:44,781 INFO L470 AbstractCegarLoop]: Abstraction has 4960 states and 14744 transitions. [2021-10-16 03:10:44,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:44,781 INFO L276 IsEmpty]: Start isEmpty. Operand 4960 states and 14744 transitions. [2021-10-16 03:10:44,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:44,789 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:44,789 INFO L512 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] [2021-10-16 03:10:44,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-10-16 03:10:44,790 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:44,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:44,790 INFO L82 PathProgramCache]: Analyzing trace with hash 990061321, now seen corresponding path program 61 times [2021-10-16 03:10:44,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:44,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464064509] [2021-10-16 03:10:44,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:44,791 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:44,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:44,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:44,952 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:44,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464064509] [2021-10-16 03:10:44,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464064509] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:44,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:44,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:10:44,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414561168] [2021-10-16 03:10:44,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:10:44,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:44,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:10:44,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:10:44,954 INFO L87 Difference]: Start difference. First operand 4960 states and 14744 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:46,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:46,125 INFO L93 Difference]: Finished difference Result 7550 states and 21919 transitions. [2021-10-16 03:10:46,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-16 03:10:46,126 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:46,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:46,141 INFO L225 Difference]: With dead ends: 7550 [2021-10-16 03:10:46,141 INFO L226 Difference]: Without dead ends: 7526 [2021-10-16 03:10:46,142 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 425.9ms TimeCoverageRelationStatistics Valid=327, Invalid=1233, Unknown=0, NotChecked=0, Total=1560 [2021-10-16 03:10:46,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7526 states. [2021-10-16 03:10:46,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7526 to 4950. [2021-10-16 03:10:46,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4950 states, 4949 states have (on average 2.975752677308547) internal successors, (14727), 4949 states have internal predecessors, (14727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:46,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4950 states to 4950 states and 14727 transitions. [2021-10-16 03:10:46,262 INFO L78 Accepts]: Start accepts. Automaton has 4950 states and 14727 transitions. Word has length 38 [2021-10-16 03:10:46,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:46,262 INFO L470 AbstractCegarLoop]: Abstraction has 4950 states and 14727 transitions. [2021-10-16 03:10:46,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:46,262 INFO L276 IsEmpty]: Start isEmpty. Operand 4950 states and 14727 transitions. [2021-10-16 03:10:46,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:46,270 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:46,270 INFO L512 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] [2021-10-16 03:10:46,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-10-16 03:10:46,270 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:46,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:46,271 INFO L82 PathProgramCache]: Analyzing trace with hash -83429617, now seen corresponding path program 62 times [2021-10-16 03:10:46,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:46,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057118411] [2021-10-16 03:10:46,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:46,271 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:46,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:46,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:46,382 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:46,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057118411] [2021-10-16 03:10:46,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057118411] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:46,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:46,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-16 03:10:46,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251893620] [2021-10-16 03:10:46,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 03:10:46,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:46,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 03:10:46,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:10:46,385 INFO L87 Difference]: Start difference. First operand 4950 states and 14727 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:46,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:46,938 INFO L93 Difference]: Finished difference Result 6964 states and 20178 transitions. [2021-10-16 03:10:46,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-16 03:10:46,938 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:46,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:46,955 INFO L225 Difference]: With dead ends: 6964 [2021-10-16 03:10:46,955 INFO L226 Difference]: Without dead ends: 6742 [2021-10-16 03:10:46,955 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 184.5ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-10-16 03:10:46,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6742 states. [2021-10-16 03:10:47,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6742 to 5028. [2021-10-16 03:10:47,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5028 states, 5027 states have (on average 2.978317087726278) internal successors, (14972), 5027 states have internal predecessors, (14972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:47,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5028 states to 5028 states and 14972 transitions. [2021-10-16 03:10:47,068 INFO L78 Accepts]: Start accepts. Automaton has 5028 states and 14972 transitions. Word has length 38 [2021-10-16 03:10:47,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:47,068 INFO L470 AbstractCegarLoop]: Abstraction has 5028 states and 14972 transitions. [2021-10-16 03:10:47,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:47,068 INFO L276 IsEmpty]: Start isEmpty. Operand 5028 states and 14972 transitions. [2021-10-16 03:10:47,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:47,076 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:47,076 INFO L512 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] [2021-10-16 03:10:47,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-10-16 03:10:47,076 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:47,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:47,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1212463843, now seen corresponding path program 63 times [2021-10-16 03:10:47,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:47,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442560608] [2021-10-16 03:10:47,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:47,086 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:47,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:47,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:47,241 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:47,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442560608] [2021-10-16 03:10:47,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442560608] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:47,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:47,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:10:47,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118400740] [2021-10-16 03:10:47,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:10:47,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:47,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:10:47,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:10:47,246 INFO L87 Difference]: Start difference. First operand 5028 states and 14972 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:48,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:48,120 INFO L93 Difference]: Finished difference Result 7034 states and 20305 transitions. [2021-10-16 03:10:48,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-16 03:10:48,120 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:48,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:48,135 INFO L225 Difference]: With dead ends: 7034 [2021-10-16 03:10:48,135 INFO L226 Difference]: Without dead ends: 6990 [2021-10-16 03:10:48,136 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 363.6ms TimeCoverageRelationStatistics Valid=323, Invalid=1009, Unknown=0, NotChecked=0, Total=1332 [2021-10-16 03:10:48,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6990 states. [2021-10-16 03:10:48,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6990 to 5048. [2021-10-16 03:10:48,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5048 states, 5047 states have (on average 2.9732514364969287) internal successors, (15006), 5047 states have internal predecessors, (15006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:48,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5048 states to 5048 states and 15006 transitions. [2021-10-16 03:10:48,293 INFO L78 Accepts]: Start accepts. Automaton has 5048 states and 15006 transitions. Word has length 38 [2021-10-16 03:10:48,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:48,294 INFO L470 AbstractCegarLoop]: Abstraction has 5048 states and 15006 transitions. [2021-10-16 03:10:48,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:48,294 INFO L276 IsEmpty]: Start isEmpty. Operand 5048 states and 15006 transitions. [2021-10-16 03:10:48,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:48,302 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:48,302 INFO L512 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] [2021-10-16 03:10:48,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-10-16 03:10:48,303 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:48,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:48,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1719528207, now seen corresponding path program 64 times [2021-10-16 03:10:48,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:48,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759818080] [2021-10-16 03:10:48,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:48,304 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:48,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:48,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:48,442 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:48,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759818080] [2021-10-16 03:10:48,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759818080] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:48,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:48,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:10:48,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819534073] [2021-10-16 03:10:48,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:10:48,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:48,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:10:48,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:10:48,444 INFO L87 Difference]: Start difference. First operand 5048 states and 15006 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:49,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:49,242 INFO L93 Difference]: Finished difference Result 7488 states and 21580 transitions. [2021-10-16 03:10:49,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-16 03:10:49,243 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:49,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:49,259 INFO L225 Difference]: With dead ends: 7488 [2021-10-16 03:10:49,259 INFO L226 Difference]: Without dead ends: 7472 [2021-10-16 03:10:49,260 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 293.6ms TimeCoverageRelationStatistics Valid=266, Invalid=790, Unknown=0, NotChecked=0, Total=1056 [2021-10-16 03:10:49,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7472 states. [2021-10-16 03:10:49,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7472 to 5058. [2021-10-16 03:10:49,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5058 states, 5057 states have (on average 2.971129127941467) internal successors, (15025), 5057 states have internal predecessors, (15025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:49,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5058 states to 5058 states and 15025 transitions. [2021-10-16 03:10:49,380 INFO L78 Accepts]: Start accepts. Automaton has 5058 states and 15025 transitions. Word has length 38 [2021-10-16 03:10:49,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:49,381 INFO L470 AbstractCegarLoop]: Abstraction has 5058 states and 15025 transitions. [2021-10-16 03:10:49,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:49,381 INFO L276 IsEmpty]: Start isEmpty. Operand 5058 states and 15025 transitions. [2021-10-16 03:10:49,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:49,389 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:49,389 INFO L512 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] [2021-10-16 03:10:49,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-10-16 03:10:49,389 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:49,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:49,390 INFO L82 PathProgramCache]: Analyzing trace with hash 648714371, now seen corresponding path program 65 times [2021-10-16 03:10:49,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:49,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511623244] [2021-10-16 03:10:49,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:49,390 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:49,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:49,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:49,542 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:49,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511623244] [2021-10-16 03:10:49,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511623244] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:49,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:49,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:10:49,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516069737] [2021-10-16 03:10:49,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:10:49,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:49,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:10:49,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:10:49,544 INFO L87 Difference]: Start difference. First operand 5058 states and 15025 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:50,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:50,714 INFO L93 Difference]: Finished difference Result 7886 states and 22592 transitions. [2021-10-16 03:10:50,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-16 03:10:50,714 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:50,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:50,731 INFO L225 Difference]: With dead ends: 7886 [2021-10-16 03:10:50,731 INFO L226 Difference]: Without dead ends: 7830 [2021-10-16 03:10:50,732 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 479.4ms TimeCoverageRelationStatistics Valid=422, Invalid=1470, Unknown=0, NotChecked=0, Total=1892 [2021-10-16 03:10:50,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7830 states. [2021-10-16 03:10:50,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7830 to 5014. [2021-10-16 03:10:50,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5014 states, 5013 states have (on average 2.9776580889686812) internal successors, (14927), 5013 states have internal predecessors, (14927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:50,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5014 states to 5014 states and 14927 transitions. [2021-10-16 03:10:50,854 INFO L78 Accepts]: Start accepts. Automaton has 5014 states and 14927 transitions. Word has length 38 [2021-10-16 03:10:50,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:50,854 INFO L470 AbstractCegarLoop]: Abstraction has 5014 states and 14927 transitions. [2021-10-16 03:10:50,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:50,855 INFO L276 IsEmpty]: Start isEmpty. Operand 5014 states and 14927 transitions. [2021-10-16 03:10:50,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:50,862 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:50,862 INFO L512 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] [2021-10-16 03:10:50,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-10-16 03:10:50,862 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:50,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:50,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1394968557, now seen corresponding path program 66 times [2021-10-16 03:10:50,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:50,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97909283] [2021-10-16 03:10:50,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:50,868 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:50,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:51,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:51,025 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:51,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97909283] [2021-10-16 03:10:51,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97909283] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:51,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:51,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:10:51,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346456071] [2021-10-16 03:10:51,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:10:51,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:51,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:10:51,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:10:51,027 INFO L87 Difference]: Start difference. First operand 5014 states and 14927 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:51,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:51,721 INFO L93 Difference]: Finished difference Result 6512 states and 19102 transitions. [2021-10-16 03:10:51,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-16 03:10:51,721 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:51,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:51,734 INFO L225 Difference]: With dead ends: 6512 [2021-10-16 03:10:51,735 INFO L226 Difference]: Without dead ends: 6496 [2021-10-16 03:10:51,735 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 274.1ms TimeCoverageRelationStatistics Valid=196, Invalid=616, Unknown=0, NotChecked=0, Total=812 [2021-10-16 03:10:51,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6496 states. [2021-10-16 03:10:51,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6496 to 5012. [2021-10-16 03:10:51,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5012 states, 5011 states have (on average 2.9778487327878667) internal successors, (14922), 5011 states have internal predecessors, (14922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:51,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5012 states to 5012 states and 14922 transitions. [2021-10-16 03:10:51,836 INFO L78 Accepts]: Start accepts. Automaton has 5012 states and 14922 transitions. Word has length 38 [2021-10-16 03:10:51,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:51,837 INFO L470 AbstractCegarLoop]: Abstraction has 5012 states and 14922 transitions. [2021-10-16 03:10:51,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:51,837 INFO L276 IsEmpty]: Start isEmpty. Operand 5012 states and 14922 transitions. [2021-10-16 03:10:51,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:51,844 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:51,844 INFO L512 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] [2021-10-16 03:10:51,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-10-16 03:10:51,844 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:51,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:51,845 INFO L82 PathProgramCache]: Analyzing trace with hash 721986531, now seen corresponding path program 67 times [2021-10-16 03:10:51,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:51,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681503410] [2021-10-16 03:10:51,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:51,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:51,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:51,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:51,983 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:51,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681503410] [2021-10-16 03:10:51,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681503410] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:51,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:51,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-16 03:10:51,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129069695] [2021-10-16 03:10:51,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-16 03:10:51,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:51,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-16 03:10:51,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-10-16 03:10:51,984 INFO L87 Difference]: Start difference. First operand 5012 states and 14922 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:52,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:52,922 INFO L93 Difference]: Finished difference Result 7258 states and 20843 transitions. [2021-10-16 03:10:52,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-16 03:10:52,923 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:52,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:52,936 INFO L225 Difference]: With dead ends: 7258 [2021-10-16 03:10:52,937 INFO L226 Difference]: Without dead ends: 7188 [2021-10-16 03:10:52,937 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 379.4ms TimeCoverageRelationStatistics Valid=329, Invalid=1153, Unknown=0, NotChecked=0, Total=1482 [2021-10-16 03:10:52,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7188 states. [2021-10-16 03:10:53,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7188 to 5114. [2021-10-16 03:10:53,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5114 states, 5113 states have (on average 2.9708585957363582) internal successors, (15190), 5113 states have internal predecessors, (15190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:53,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5114 states to 5114 states and 15190 transitions. [2021-10-16 03:10:53,052 INFO L78 Accepts]: Start accepts. Automaton has 5114 states and 15190 transitions. Word has length 38 [2021-10-16 03:10:53,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:53,052 INFO L470 AbstractCegarLoop]: Abstraction has 5114 states and 15190 transitions. [2021-10-16 03:10:53,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:53,052 INFO L276 IsEmpty]: Start isEmpty. Operand 5114 states and 15190 transitions. [2021-10-16 03:10:53,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:53,059 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:53,059 INFO L512 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] [2021-10-16 03:10:53,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-10-16 03:10:53,059 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:53,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:53,060 INFO L82 PathProgramCache]: Analyzing trace with hash -971475479, now seen corresponding path program 68 times [2021-10-16 03:10:53,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:53,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159118655] [2021-10-16 03:10:53,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:53,060 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:53,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:53,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:53,190 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:53,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159118655] [2021-10-16 03:10:53,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159118655] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:53,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:53,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:10:53,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262757933] [2021-10-16 03:10:53,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:10:53,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:53,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:10:53,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:10:53,192 INFO L87 Difference]: Start difference. First operand 5114 states and 15190 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:54,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:54,158 INFO L93 Difference]: Finished difference Result 7508 states and 21592 transitions. [2021-10-16 03:10:54,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-16 03:10:54,158 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:54,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:54,171 INFO L225 Difference]: With dead ends: 7508 [2021-10-16 03:10:54,172 INFO L226 Difference]: Without dead ends: 7464 [2021-10-16 03:10:54,172 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 353.8ms TimeCoverageRelationStatistics Valid=275, Invalid=915, Unknown=0, NotChecked=0, Total=1190 [2021-10-16 03:10:54,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7464 states. [2021-10-16 03:10:54,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7464 to 5140. [2021-10-16 03:10:54,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5140 states, 5139 states have (on average 2.968476357267951) internal successors, (15255), 5139 states have internal predecessors, (15255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:54,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5140 states to 5140 states and 15255 transitions. [2021-10-16 03:10:54,282 INFO L78 Accepts]: Start accepts. Automaton has 5140 states and 15255 transitions. Word has length 38 [2021-10-16 03:10:54,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:54,283 INFO L470 AbstractCegarLoop]: Abstraction has 5140 states and 15255 transitions. [2021-10-16 03:10:54,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:54,283 INFO L276 IsEmpty]: Start isEmpty. Operand 5140 states and 15255 transitions. [2021-10-16 03:10:54,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:54,293 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:54,294 INFO L512 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] [2021-10-16 03:10:54,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-10-16 03:10:54,294 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:54,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:54,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1645862689, now seen corresponding path program 69 times [2021-10-16 03:10:54,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:54,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269066022] [2021-10-16 03:10:54,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:54,295 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:54,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:54,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:54,441 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:54,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269066022] [2021-10-16 03:10:54,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269066022] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:54,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:54,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-16 03:10:54,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167814723] [2021-10-16 03:10:54,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-16 03:10:54,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:54,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-16 03:10:54,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-10-16 03:10:54,442 INFO L87 Difference]: Start difference. First operand 5140 states and 15255 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:55,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:55,449 INFO L93 Difference]: Finished difference Result 7920 states and 22623 transitions. [2021-10-16 03:10:55,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-16 03:10:55,450 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:55,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:55,464 INFO L225 Difference]: With dead ends: 7920 [2021-10-16 03:10:55,464 INFO L226 Difference]: Without dead ends: 7838 [2021-10-16 03:10:55,465 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 414.0ms TimeCoverageRelationStatistics Valid=430, Invalid=1640, Unknown=0, NotChecked=0, Total=2070 [2021-10-16 03:10:55,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7838 states. [2021-10-16 03:10:55,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7838 to 5090. [2021-10-16 03:10:55,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5090 states, 5089 states have (on average 2.972882688150914) internal successors, (15129), 5089 states have internal predecessors, (15129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:55,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5090 states to 5090 states and 15129 transitions. [2021-10-16 03:10:55,583 INFO L78 Accepts]: Start accepts. Automaton has 5090 states and 15129 transitions. Word has length 38 [2021-10-16 03:10:55,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:55,583 INFO L470 AbstractCegarLoop]: Abstraction has 5090 states and 15129 transitions. [2021-10-16 03:10:55,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:55,587 INFO L276 IsEmpty]: Start isEmpty. Operand 5090 states and 15129 transitions. [2021-10-16 03:10:55,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:55,595 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:55,595 INFO L512 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] [2021-10-16 03:10:55,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-10-16 03:10:55,595 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:55,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:55,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1715070647, now seen corresponding path program 70 times [2021-10-16 03:10:55,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:55,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113397243] [2021-10-16 03:10:55,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:55,596 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:55,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:55,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:55,751 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:55,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113397243] [2021-10-16 03:10:55,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113397243] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:55,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:55,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-16 03:10:55,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967441421] [2021-10-16 03:10:55,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-16 03:10:55,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:55,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-16 03:10:55,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-10-16 03:10:55,754 INFO L87 Difference]: Start difference. First operand 5090 states and 15129 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:56,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:56,458 INFO L93 Difference]: Finished difference Result 6536 states and 19108 transitions. [2021-10-16 03:10:56,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-16 03:10:56,459 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:56,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:56,472 INFO L225 Difference]: With dead ends: 6536 [2021-10-16 03:10:56,472 INFO L226 Difference]: Without dead ends: 6506 [2021-10-16 03:10:56,472 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 266.1ms TimeCoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2021-10-16 03:10:56,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6506 states. [2021-10-16 03:10:56,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6506 to 5074. [2021-10-16 03:10:56,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5074 states, 5073 states have (on average 2.976936723832052) internal successors, (15102), 5073 states have internal predecessors, (15102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:56,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5074 states to 5074 states and 15102 transitions. [2021-10-16 03:10:56,582 INFO L78 Accepts]: Start accepts. Automaton has 5074 states and 15102 transitions. Word has length 38 [2021-10-16 03:10:56,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:56,582 INFO L470 AbstractCegarLoop]: Abstraction has 5074 states and 15102 transitions. [2021-10-16 03:10:56,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:56,582 INFO L276 IsEmpty]: Start isEmpty. Operand 5074 states and 15102 transitions. [2021-10-16 03:10:56,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:56,590 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:56,590 INFO L512 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] [2021-10-16 03:10:56,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-10-16 03:10:56,591 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:56,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:56,591 INFO L82 PathProgramCache]: Analyzing trace with hash -799932749, now seen corresponding path program 71 times [2021-10-16 03:10:56,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:56,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918828131] [2021-10-16 03:10:56,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:56,592 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:56,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:56,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:56,703 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:56,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918828131] [2021-10-16 03:10:56,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918828131] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:56,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:56,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-16 03:10:56,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616075416] [2021-10-16 03:10:56,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 03:10:56,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:56,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 03:10:56,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:10:56,705 INFO L87 Difference]: Start difference. First operand 5074 states and 15102 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:57,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:57,385 INFO L93 Difference]: Finished difference Result 6956 states and 19737 transitions. [2021-10-16 03:10:57,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-16 03:10:57,385 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:57,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:57,400 INFO L225 Difference]: With dead ends: 6956 [2021-10-16 03:10:57,400 INFO L226 Difference]: Without dead ends: 6944 [2021-10-16 03:10:57,401 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 213.7ms TimeCoverageRelationStatistics Valid=151, Invalid=401, Unknown=0, NotChecked=0, Total=552 [2021-10-16 03:10:57,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6944 states. [2021-10-16 03:10:57,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6944 to 5086. [2021-10-16 03:10:57,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5086 states, 5085 states have (on average 2.977187807276303) internal successors, (15139), 5085 states have internal predecessors, (15139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:57,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5086 states to 5086 states and 15139 transitions. [2021-10-16 03:10:57,518 INFO L78 Accepts]: Start accepts. Automaton has 5086 states and 15139 transitions. Word has length 38 [2021-10-16 03:10:57,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:57,519 INFO L470 AbstractCegarLoop]: Abstraction has 5086 states and 15139 transitions. [2021-10-16 03:10:57,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:57,519 INFO L276 IsEmpty]: Start isEmpty. Operand 5086 states and 15139 transitions. [2021-10-16 03:10:57,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:57,526 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:57,527 INFO L512 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] [2021-10-16 03:10:57,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-10-16 03:10:57,527 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:57,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:57,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1244378183, now seen corresponding path program 72 times [2021-10-16 03:10:57,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:57,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056292405] [2021-10-16 03:10:57,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:57,528 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:57,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:57,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:57,668 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:57,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056292405] [2021-10-16 03:10:57,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056292405] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:57,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:57,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:10:57,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467837398] [2021-10-16 03:10:57,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:10:57,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:57,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:10:57,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:10:57,670 INFO L87 Difference]: Start difference. First operand 5086 states and 15139 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:58,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:58,401 INFO L93 Difference]: Finished difference Result 6906 states and 19609 transitions. [2021-10-16 03:10:58,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-16 03:10:58,402 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:58,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:58,416 INFO L225 Difference]: With dead ends: 6906 [2021-10-16 03:10:58,417 INFO L226 Difference]: Without dead ends: 6834 [2021-10-16 03:10:58,417 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 226.3ms TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2021-10-16 03:10:58,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6834 states. [2021-10-16 03:10:58,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6834 to 5066. [2021-10-16 03:10:58,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5066 states, 5065 states have (on average 2.9772951628825273) internal successors, (15080), 5065 states have internal predecessors, (15080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:58,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5066 states to 5066 states and 15080 transitions. [2021-10-16 03:10:58,532 INFO L78 Accepts]: Start accepts. Automaton has 5066 states and 15080 transitions. Word has length 38 [2021-10-16 03:10:58,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:58,532 INFO L470 AbstractCegarLoop]: Abstraction has 5066 states and 15080 transitions. [2021-10-16 03:10:58,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:58,532 INFO L276 IsEmpty]: Start isEmpty. Operand 5066 states and 15080 transitions. [2021-10-16 03:10:58,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:58,540 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:58,540 INFO L512 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] [2021-10-16 03:10:58,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-10-16 03:10:58,540 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:58,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:58,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1162564555, now seen corresponding path program 73 times [2021-10-16 03:10:58,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:58,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384065898] [2021-10-16 03:10:58,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:58,541 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:58,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:58,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:58,645 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:58,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384065898] [2021-10-16 03:10:58,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384065898] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:58,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:58,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-16 03:10:58,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547139813] [2021-10-16 03:10:58,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 03:10:58,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:58,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 03:10:58,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:10:58,647 INFO L87 Difference]: Start difference. First operand 5066 states and 15080 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:59,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:59,281 INFO L93 Difference]: Finished difference Result 6848 states and 19601 transitions. [2021-10-16 03:10:59,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-16 03:10:59,281 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:10:59,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:59,339 INFO L225 Difference]: With dead ends: 6848 [2021-10-16 03:10:59,339 INFO L226 Difference]: Without dead ends: 6836 [2021-10-16 03:10:59,340 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 206.2ms TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2021-10-16 03:10:59,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6836 states. [2021-10-16 03:10:59,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6836 to 5056. [2021-10-16 03:10:59,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5056 states, 5055 states have (on average 2.9758654797230464) internal successors, (15043), 5055 states have internal predecessors, (15043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:59,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5056 states to 5056 states and 15043 transitions. [2021-10-16 03:10:59,452 INFO L78 Accepts]: Start accepts. Automaton has 5056 states and 15043 transitions. Word has length 38 [2021-10-16 03:10:59,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:59,452 INFO L470 AbstractCegarLoop]: Abstraction has 5056 states and 15043 transitions. [2021-10-16 03:10:59,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:59,452 INFO L276 IsEmpty]: Start isEmpty. Operand 5056 states and 15043 transitions. [2021-10-16 03:10:59,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:10:59,460 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:59,460 INFO L512 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] [2021-10-16 03:10:59,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-10-16 03:10:59,460 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:10:59,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:59,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1297716341, now seen corresponding path program 74 times [2021-10-16 03:10:59,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:10:59,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310971295] [2021-10-16 03:10:59,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:59,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:10:59,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:59,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:59,565 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:10:59,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310971295] [2021-10-16 03:10:59,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310971295] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:59,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:59,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:10:59,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55371531] [2021-10-16 03:10:59,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:10:59,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:10:59,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:10:59,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:10:59,567 INFO L87 Difference]: Start difference. First operand 5056 states and 15043 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:00,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:00,318 INFO L93 Difference]: Finished difference Result 7178 states and 20348 transitions. [2021-10-16 03:11:00,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-16 03:11:00,319 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:00,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:00,334 INFO L225 Difference]: With dead ends: 7178 [2021-10-16 03:11:00,334 INFO L226 Difference]: Without dead ends: 7170 [2021-10-16 03:11:00,335 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 258.5ms TimeCoverageRelationStatistics Valid=228, Invalid=764, Unknown=0, NotChecked=0, Total=992 [2021-10-16 03:11:00,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7170 states. [2021-10-16 03:11:00,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7170 to 5052. [2021-10-16 03:11:00,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5052 states, 5051 states have (on average 2.976242328251831) internal successors, (15033), 5051 states have internal predecessors, (15033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:00,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5052 states to 5052 states and 15033 transitions. [2021-10-16 03:11:00,456 INFO L78 Accepts]: Start accepts. Automaton has 5052 states and 15033 transitions. Word has length 38 [2021-10-16 03:11:00,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:00,456 INFO L470 AbstractCegarLoop]: Abstraction has 5052 states and 15033 transitions. [2021-10-16 03:11:00,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:00,457 INFO L276 IsEmpty]: Start isEmpty. Operand 5052 states and 15033 transitions. [2021-10-16 03:11:00,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:00,463 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:00,464 INFO L512 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] [2021-10-16 03:11:00,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-10-16 03:11:00,464 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:00,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:00,464 INFO L82 PathProgramCache]: Analyzing trace with hash 635709721, now seen corresponding path program 75 times [2021-10-16 03:11:00,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:00,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570166662] [2021-10-16 03:11:00,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:00,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:00,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:00,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:00,621 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:00,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570166662] [2021-10-16 03:11:00,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570166662] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:00,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:00,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:11:00,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623318927] [2021-10-16 03:11:00,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:11:00,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:00,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:11:00,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:11:00,623 INFO L87 Difference]: Start difference. First operand 5052 states and 15033 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:01,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:01,512 INFO L93 Difference]: Finished difference Result 6744 states and 19296 transitions. [2021-10-16 03:11:01,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-16 03:11:01,513 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:01,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:01,534 INFO L225 Difference]: With dead ends: 6744 [2021-10-16 03:11:01,534 INFO L226 Difference]: Without dead ends: 6676 [2021-10-16 03:11:01,535 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 266.2ms TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2021-10-16 03:11:01,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6676 states. [2021-10-16 03:11:01,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6676 to 4992. [2021-10-16 03:11:01,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4992 states, 4991 states have (on average 2.9727509517130835) internal successors, (14837), 4991 states have internal predecessors, (14837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:01,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4992 states to 4992 states and 14837 transitions. [2021-10-16 03:11:01,695 INFO L78 Accepts]: Start accepts. Automaton has 4992 states and 14837 transitions. Word has length 38 [2021-10-16 03:11:01,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:01,695 INFO L470 AbstractCegarLoop]: Abstraction has 4992 states and 14837 transitions. [2021-10-16 03:11:01,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:01,696 INFO L276 IsEmpty]: Start isEmpty. Operand 4992 states and 14837 transitions. [2021-10-16 03:11:01,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:01,707 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:01,707 INFO L512 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] [2021-10-16 03:11:01,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-10-16 03:11:01,708 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:01,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:01,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1051679685, now seen corresponding path program 76 times [2021-10-16 03:11:01,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:01,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377876709] [2021-10-16 03:11:01,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:01,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:01,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:01,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:01,880 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:01,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377876709] [2021-10-16 03:11:01,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377876709] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:01,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:01,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:11:01,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674716179] [2021-10-16 03:11:01,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:11:01,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:01,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:11:01,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:11:01,881 INFO L87 Difference]: Start difference. First operand 4992 states and 14837 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:02,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:02,782 INFO L93 Difference]: Finished difference Result 6882 states and 19542 transitions. [2021-10-16 03:11:02,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-16 03:11:02,782 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:02,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:02,799 INFO L225 Difference]: With dead ends: 6882 [2021-10-16 03:11:02,799 INFO L226 Difference]: Without dead ends: 6830 [2021-10-16 03:11:02,799 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 320.2ms TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2021-10-16 03:11:02,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6830 states. [2021-10-16 03:11:02,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6830 to 4964. [2021-10-16 03:11:02,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4964 states, 4963 states have (on average 2.9790449325005035) internal successors, (14785), 4963 states have internal predecessors, (14785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:02,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4964 states to 4964 states and 14785 transitions. [2021-10-16 03:11:02,911 INFO L78 Accepts]: Start accepts. Automaton has 4964 states and 14785 transitions. Word has length 38 [2021-10-16 03:11:02,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:02,911 INFO L470 AbstractCegarLoop]: Abstraction has 4964 states and 14785 transitions. [2021-10-16 03:11:02,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:02,912 INFO L276 IsEmpty]: Start isEmpty. Operand 4964 states and 14785 transitions. [2021-10-16 03:11:02,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:02,920 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:02,920 INFO L512 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] [2021-10-16 03:11:02,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-10-16 03:11:02,920 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:02,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:02,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1985279637, now seen corresponding path program 77 times [2021-10-16 03:11:02,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:02,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383504131] [2021-10-16 03:11:02,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:02,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:02,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:03,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:03,017 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:03,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383504131] [2021-10-16 03:11:03,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383504131] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:03,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:03,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-16 03:11:03,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807211115] [2021-10-16 03:11:03,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 03:11:03,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:03,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 03:11:03,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:11:03,019 INFO L87 Difference]: Start difference. First operand 4964 states and 14785 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:03,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:03,601 INFO L93 Difference]: Finished difference Result 6454 states and 18411 transitions. [2021-10-16 03:11:03,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-16 03:11:03,601 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:03,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:03,614 INFO L225 Difference]: With dead ends: 6454 [2021-10-16 03:11:03,614 INFO L226 Difference]: Without dead ends: 6168 [2021-10-16 03:11:03,614 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 184.7ms TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2021-10-16 03:11:03,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6168 states. [2021-10-16 03:11:03,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6168 to 5000. [2021-10-16 03:11:03,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5000 states, 4999 states have (on average 2.9707941588317666) internal successors, (14851), 4999 states have internal predecessors, (14851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:03,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5000 states to 5000 states and 14851 transitions. [2021-10-16 03:11:03,721 INFO L78 Accepts]: Start accepts. Automaton has 5000 states and 14851 transitions. Word has length 38 [2021-10-16 03:11:03,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:03,721 INFO L470 AbstractCegarLoop]: Abstraction has 5000 states and 14851 transitions. [2021-10-16 03:11:03,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:03,722 INFO L276 IsEmpty]: Start isEmpty. Operand 5000 states and 14851 transitions. [2021-10-16 03:11:03,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:03,729 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:03,729 INFO L512 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] [2021-10-16 03:11:03,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-10-16 03:11:03,729 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:03,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:03,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1254738539, now seen corresponding path program 78 times [2021-10-16 03:11:03,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:03,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101036894] [2021-10-16 03:11:03,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:03,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:03,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:03,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:03,849 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:03,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101036894] [2021-10-16 03:11:03,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101036894] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:03,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:03,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:11:03,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771372954] [2021-10-16 03:11:03,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:11:03,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:03,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:11:03,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:11:03,851 INFO L87 Difference]: Start difference. First operand 5000 states and 14851 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:05,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:05,019 INFO L93 Difference]: Finished difference Result 6860 states and 19780 transitions. [2021-10-16 03:11:05,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-16 03:11:05,020 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:05,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:05,035 INFO L225 Difference]: With dead ends: 6860 [2021-10-16 03:11:05,035 INFO L226 Difference]: Without dead ends: 6816 [2021-10-16 03:11:05,035 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 485.2ms TimeCoverageRelationStatistics Valid=350, Invalid=1132, Unknown=0, NotChecked=0, Total=1482 [2021-10-16 03:11:05,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6816 states. [2021-10-16 03:11:05,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6816 to 5008. [2021-10-16 03:11:05,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5008 states, 5007 states have (on average 2.9724385859796287) internal successors, (14883), 5007 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:05,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5008 states to 5008 states and 14883 transitions. [2021-10-16 03:11:05,197 INFO L78 Accepts]: Start accepts. Automaton has 5008 states and 14883 transitions. Word has length 38 [2021-10-16 03:11:05,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:05,198 INFO L470 AbstractCegarLoop]: Abstraction has 5008 states and 14883 transitions. [2021-10-16 03:11:05,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:05,198 INFO L276 IsEmpty]: Start isEmpty. Operand 5008 states and 14883 transitions. [2021-10-16 03:11:05,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:05,205 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:05,206 INFO L512 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] [2021-10-16 03:11:05,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-10-16 03:11:05,206 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:05,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:05,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1007751455, now seen corresponding path program 79 times [2021-10-16 03:11:05,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:05,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033604332] [2021-10-16 03:11:05,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:05,207 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:05,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:05,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:05,286 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:05,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033604332] [2021-10-16 03:11:05,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033604332] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:05,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:05,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-16 03:11:05,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809234498] [2021-10-16 03:11:05,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-16 03:11:05,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:05,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-16 03:11:05,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-16 03:11:05,289 INFO L87 Difference]: Start difference. First operand 5008 states and 14883 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:05,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:05,725 INFO L93 Difference]: Finished difference Result 5914 states and 16890 transitions. [2021-10-16 03:11:05,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-16 03:11:05,726 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:05,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:05,738 INFO L225 Difference]: With dead ends: 5914 [2021-10-16 03:11:05,738 INFO L226 Difference]: Without dead ends: 5834 [2021-10-16 03:11:05,738 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 148.0ms TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2021-10-16 03:11:05,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5834 states. [2021-10-16 03:11:05,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5834 to 5024. [2021-10-16 03:11:05,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5024 states, 5023 states have (on average 2.9560023890105516) internal successors, (14848), 5023 states have internal predecessors, (14848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:05,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5024 states to 5024 states and 14848 transitions. [2021-10-16 03:11:05,845 INFO L78 Accepts]: Start accepts. Automaton has 5024 states and 14848 transitions. Word has length 38 [2021-10-16 03:11:05,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:05,846 INFO L470 AbstractCegarLoop]: Abstraction has 5024 states and 14848 transitions. [2021-10-16 03:11:05,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:05,846 INFO L276 IsEmpty]: Start isEmpty. Operand 5024 states and 14848 transitions. [2021-10-16 03:11:05,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:05,853 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:05,853 INFO L512 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] [2021-10-16 03:11:05,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-10-16 03:11:05,854 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:05,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:05,854 INFO L82 PathProgramCache]: Analyzing trace with hash -2108986949, now seen corresponding path program 80 times [2021-10-16 03:11:05,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:05,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525565323] [2021-10-16 03:11:05,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:05,855 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:05,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:05,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:05,988 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:05,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525565323] [2021-10-16 03:11:05,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525565323] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:05,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:05,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-16 03:11:05,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379873801] [2021-10-16 03:11:05,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-16 03:11:05,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:05,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-16 03:11:05,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-10-16 03:11:05,990 INFO L87 Difference]: Start difference. First operand 5024 states and 14848 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:07,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:07,045 INFO L93 Difference]: Finished difference Result 7126 states and 20298 transitions. [2021-10-16 03:11:07,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-16 03:11:07,046 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:07,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:07,061 INFO L225 Difference]: With dead ends: 7126 [2021-10-16 03:11:07,061 INFO L226 Difference]: Without dead ends: 7034 [2021-10-16 03:11:07,062 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 431.2ms TimeCoverageRelationStatistics Valid=356, Invalid=1284, Unknown=0, NotChecked=0, Total=1640 [2021-10-16 03:11:07,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7034 states. [2021-10-16 03:11:07,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7034 to 5022. [2021-10-16 03:11:07,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5022 states, 5021 states have (on average 2.9607647878908585) internal successors, (14866), 5021 states have internal predecessors, (14866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:07,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5022 states to 5022 states and 14866 transitions. [2021-10-16 03:11:07,182 INFO L78 Accepts]: Start accepts. Automaton has 5022 states and 14866 transitions. Word has length 38 [2021-10-16 03:11:07,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:07,182 INFO L470 AbstractCegarLoop]: Abstraction has 5022 states and 14866 transitions. [2021-10-16 03:11:07,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:07,182 INFO L276 IsEmpty]: Start isEmpty. Operand 5022 states and 14866 transitions. [2021-10-16 03:11:07,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:07,189 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:07,190 INFO L512 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] [2021-10-16 03:11:07,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-10-16 03:11:07,190 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:07,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:07,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1134162117, now seen corresponding path program 81 times [2021-10-16 03:11:07,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:07,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278721660] [2021-10-16 03:11:07,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:07,191 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:07,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:07,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:07,317 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:07,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278721660] [2021-10-16 03:11:07,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278721660] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:07,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:07,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-16 03:11:07,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504839104] [2021-10-16 03:11:07,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 03:11:07,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:07,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 03:11:07,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:11:07,319 INFO L87 Difference]: Start difference. First operand 5022 states and 14866 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:07,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:07,951 INFO L93 Difference]: Finished difference Result 5808 states and 16853 transitions. [2021-10-16 03:11:07,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-16 03:11:07,952 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:07,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:07,967 INFO L225 Difference]: With dead ends: 5808 [2021-10-16 03:11:07,968 INFO L226 Difference]: Without dead ends: 5532 [2021-10-16 03:11:07,968 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 163.4ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-10-16 03:11:07,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5532 states. [2021-10-16 03:11:08,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5532 to 5122. [2021-10-16 03:11:08,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5122 states, 5121 states have (on average 2.9519625073227886) internal successors, (15117), 5121 states have internal predecessors, (15117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:08,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5122 states to 5122 states and 15117 transitions. [2021-10-16 03:11:08,116 INFO L78 Accepts]: Start accepts. Automaton has 5122 states and 15117 transitions. Word has length 38 [2021-10-16 03:11:08,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:08,116 INFO L470 AbstractCegarLoop]: Abstraction has 5122 states and 15117 transitions. [2021-10-16 03:11:08,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:08,116 INFO L276 IsEmpty]: Start isEmpty. Operand 5122 states and 15117 transitions. [2021-10-16 03:11:08,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:08,127 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:08,128 INFO L512 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] [2021-10-16 03:11:08,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-10-16 03:11:08,128 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:08,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:08,129 INFO L82 PathProgramCache]: Analyzing trace with hash -746729101, now seen corresponding path program 82 times [2021-10-16 03:11:08,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:08,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434856318] [2021-10-16 03:11:08,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:08,130 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:08,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:08,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:08,235 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:08,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434856318] [2021-10-16 03:11:08,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434856318] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:08,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:08,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-16 03:11:08,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291859413] [2021-10-16 03:11:08,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 03:11:08,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:08,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 03:11:08,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:11:08,237 INFO L87 Difference]: Start difference. First operand 5122 states and 15117 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:08,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:08,896 INFO L93 Difference]: Finished difference Result 7190 states and 20377 transitions. [2021-10-16 03:11:08,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-16 03:11:08,897 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:08,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:08,910 INFO L225 Difference]: With dead ends: 7190 [2021-10-16 03:11:08,910 INFO L226 Difference]: Without dead ends: 7174 [2021-10-16 03:11:08,910 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 245.0ms TimeCoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2021-10-16 03:11:08,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7174 states. [2021-10-16 03:11:08,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7174 to 5126. [2021-10-16 03:11:09,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5126 states, 5125 states have (on average 2.950048780487805) internal successors, (15119), 5125 states have internal predecessors, (15119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:09,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5126 states to 5126 states and 15119 transitions. [2021-10-16 03:11:09,017 INFO L78 Accepts]: Start accepts. Automaton has 5126 states and 15119 transitions. Word has length 38 [2021-10-16 03:11:09,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:09,017 INFO L470 AbstractCegarLoop]: Abstraction has 5126 states and 15119 transitions. [2021-10-16 03:11:09,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:09,018 INFO L276 IsEmpty]: Start isEmpty. Operand 5126 states and 15119 transitions. [2021-10-16 03:11:09,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:09,024 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:09,025 INFO L512 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] [2021-10-16 03:11:09,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-10-16 03:11:09,025 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:09,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:09,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1713551795, now seen corresponding path program 83 times [2021-10-16 03:11:09,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:09,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182694613] [2021-10-16 03:11:09,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:09,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:09,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:09,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:09,133 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:09,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182694613] [2021-10-16 03:11:09,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182694613] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:09,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:09,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:11:09,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816075570] [2021-10-16 03:11:09,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:11:09,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:09,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:11:09,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:11:09,136 INFO L87 Difference]: Start difference. First operand 5126 states and 15119 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:10,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:10,048 INFO L93 Difference]: Finished difference Result 7572 states and 21274 transitions. [2021-10-16 03:11:10,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-16 03:11:10,048 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:10,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:10,063 INFO L225 Difference]: With dead ends: 7572 [2021-10-16 03:11:10,063 INFO L226 Difference]: Without dead ends: 7540 [2021-10-16 03:11:10,064 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 309.8ms TimeCoverageRelationStatistics Valid=297, Invalid=1035, Unknown=0, NotChecked=0, Total=1332 [2021-10-16 03:11:10,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7540 states. [2021-10-16 03:11:10,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7540 to 5104. [2021-10-16 03:11:10,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5104 states, 5103 states have (on average 2.9500293944738387) internal successors, (15054), 5103 states have internal predecessors, (15054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:10,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5104 states to 5104 states and 15054 transitions. [2021-10-16 03:11:10,180 INFO L78 Accepts]: Start accepts. Automaton has 5104 states and 15054 transitions. Word has length 38 [2021-10-16 03:11:10,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:10,180 INFO L470 AbstractCegarLoop]: Abstraction has 5104 states and 15054 transitions. [2021-10-16 03:11:10,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:10,180 INFO L276 IsEmpty]: Start isEmpty. Operand 5104 states and 15054 transitions. [2021-10-16 03:11:10,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:10,188 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:10,188 INFO L512 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] [2021-10-16 03:11:10,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-10-16 03:11:10,188 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:10,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:10,189 INFO L82 PathProgramCache]: Analyzing trace with hash 719238175, now seen corresponding path program 84 times [2021-10-16 03:11:10,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:10,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060399574] [2021-10-16 03:11:10,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:10,190 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:10,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:10,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:10,343 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:10,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060399574] [2021-10-16 03:11:10,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060399574] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:10,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:10,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:11:10,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233598236] [2021-10-16 03:11:10,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:11:10,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:10,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:11:10,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:11:10,345 INFO L87 Difference]: Start difference. First operand 5104 states and 15054 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:11,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:11,004 INFO L93 Difference]: Finished difference Result 6310 states and 17929 transitions. [2021-10-16 03:11:11,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-16 03:11:11,005 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:11,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:11,017 INFO L225 Difference]: With dead ends: 6310 [2021-10-16 03:11:11,017 INFO L226 Difference]: Without dead ends: 6258 [2021-10-16 03:11:11,018 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 250.3ms TimeCoverageRelationStatistics Valid=222, Invalid=648, Unknown=0, NotChecked=0, Total=870 [2021-10-16 03:11:11,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6258 states. [2021-10-16 03:11:11,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6258 to 5074. [2021-10-16 03:11:11,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5074 states, 5073 states have (on average 2.9503252513305736) internal successors, (14967), 5073 states have internal predecessors, (14967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:11,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5074 states to 5074 states and 14967 transitions. [2021-10-16 03:11:11,128 INFO L78 Accepts]: Start accepts. Automaton has 5074 states and 14967 transitions. Word has length 38 [2021-10-16 03:11:11,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:11,128 INFO L470 AbstractCegarLoop]: Abstraction has 5074 states and 14967 transitions. [2021-10-16 03:11:11,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:11,129 INFO L276 IsEmpty]: Start isEmpty. Operand 5074 states and 14967 transitions. [2021-10-16 03:11:11,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:11,137 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:11,137 INFO L512 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] [2021-10-16 03:11:11,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-10-16 03:11:11,138 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:11,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:11,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1640336809, now seen corresponding path program 85 times [2021-10-16 03:11:11,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:11,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235722021] [2021-10-16 03:11:11,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:11,139 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:11,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:11,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:11,248 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:11,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235722021] [2021-10-16 03:11:11,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235722021] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:11,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:11,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:11:11,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387305867] [2021-10-16 03:11:11,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:11:11,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:11,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:11:11,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:11:11,252 INFO L87 Difference]: Start difference. First operand 5074 states and 14967 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:12,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:12,121 INFO L93 Difference]: Finished difference Result 6302 states and 17885 transitions. [2021-10-16 03:11:12,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-16 03:11:12,122 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:12,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:12,134 INFO L225 Difference]: With dead ends: 6302 [2021-10-16 03:11:12,135 INFO L226 Difference]: Without dead ends: 6258 [2021-10-16 03:11:12,135 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 356.2ms TimeCoverageRelationStatistics Valid=334, Invalid=1072, Unknown=0, NotChecked=0, Total=1406 [2021-10-16 03:11:12,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6258 states. [2021-10-16 03:11:12,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6258 to 4968. [2021-10-16 03:11:12,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4968 states, 4967 states have (on average 2.9639621501912625) internal successors, (14722), 4967 states have internal predecessors, (14722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:12,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4968 states to 4968 states and 14722 transitions. [2021-10-16 03:11:12,245 INFO L78 Accepts]: Start accepts. Automaton has 4968 states and 14722 transitions. Word has length 38 [2021-10-16 03:11:12,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:12,246 INFO L470 AbstractCegarLoop]: Abstraction has 4968 states and 14722 transitions. [2021-10-16 03:11:12,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:12,246 INFO L276 IsEmpty]: Start isEmpty. Operand 4968 states and 14722 transitions. [2021-10-16 03:11:12,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:12,254 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:12,254 INFO L512 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] [2021-10-16 03:11:12,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-10-16 03:11:12,254 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:12,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:12,254 INFO L82 PathProgramCache]: Analyzing trace with hash 307689743, now seen corresponding path program 86 times [2021-10-16 03:11:12,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:12,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38334416] [2021-10-16 03:11:12,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:12,255 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:12,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:12,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:12,380 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:12,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38334416] [2021-10-16 03:11:12,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38334416] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:12,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:12,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:11:12,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34716244] [2021-10-16 03:11:12,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:11:12,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:12,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:11:12,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:11:12,382 INFO L87 Difference]: Start difference. First operand 4968 states and 14722 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:13,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:13,245 INFO L93 Difference]: Finished difference Result 5706 states and 16393 transitions. [2021-10-16 03:11:13,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-16 03:11:13,246 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:13,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:13,263 INFO L225 Difference]: With dead ends: 5706 [2021-10-16 03:11:13,263 INFO L226 Difference]: Without dead ends: 5638 [2021-10-16 03:11:13,263 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 306.5ms TimeCoverageRelationStatistics Valid=216, Invalid=596, Unknown=0, NotChecked=0, Total=812 [2021-10-16 03:11:13,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5638 states. [2021-10-16 03:11:13,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5638 to 5064. [2021-10-16 03:11:13,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5064 states, 5063 states have (on average 2.9527947857001777) internal successors, (14950), 5063 states have internal predecessors, (14950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:13,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5064 states to 5064 states and 14950 transitions. [2021-10-16 03:11:13,413 INFO L78 Accepts]: Start accepts. Automaton has 5064 states and 14950 transitions. Word has length 38 [2021-10-16 03:11:13,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:13,413 INFO L470 AbstractCegarLoop]: Abstraction has 5064 states and 14950 transitions. [2021-10-16 03:11:13,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:13,414 INFO L276 IsEmpty]: Start isEmpty. Operand 5064 states and 14950 transitions. [2021-10-16 03:11:13,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:13,425 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:13,425 INFO L512 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] [2021-10-16 03:11:13,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-10-16 03:11:13,426 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:13,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:13,426 INFO L82 PathProgramCache]: Analyzing trace with hash 123561245, now seen corresponding path program 87 times [2021-10-16 03:11:13,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:13,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639928490] [2021-10-16 03:11:13,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:13,427 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:13,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:13,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:13,552 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:13,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639928490] [2021-10-16 03:11:13,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639928490] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:13,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:13,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:11:13,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549547260] [2021-10-16 03:11:13,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:11:13,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:13,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:11:13,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:11:13,554 INFO L87 Difference]: Start difference. First operand 5064 states and 14950 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:14,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:14,374 INFO L93 Difference]: Finished difference Result 6170 states and 17540 transitions. [2021-10-16 03:11:14,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-16 03:11:14,375 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:14,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:14,387 INFO L225 Difference]: With dead ends: 6170 [2021-10-16 03:11:14,387 INFO L226 Difference]: Without dead ends: 6096 [2021-10-16 03:11:14,388 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 271.7ms TimeCoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2021-10-16 03:11:14,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6096 states. [2021-10-16 03:11:14,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6096 to 5064. [2021-10-16 03:11:14,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5064 states, 5063 states have (on average 2.9492395812759233) internal successors, (14932), 5063 states have internal predecessors, (14932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:14,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5064 states to 5064 states and 14932 transitions. [2021-10-16 03:11:14,498 INFO L78 Accepts]: Start accepts. Automaton has 5064 states and 14932 transitions. Word has length 38 [2021-10-16 03:11:14,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:14,498 INFO L470 AbstractCegarLoop]: Abstraction has 5064 states and 14932 transitions. [2021-10-16 03:11:14,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:14,499 INFO L276 IsEmpty]: Start isEmpty. Operand 5064 states and 14932 transitions. [2021-10-16 03:11:14,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:14,510 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:14,510 INFO L512 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] [2021-10-16 03:11:14,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-10-16 03:11:14,510 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:14,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:14,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1818428209, now seen corresponding path program 88 times [2021-10-16 03:11:14,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:14,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703956481] [2021-10-16 03:11:14,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:14,512 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:14,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:14,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:14,628 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:14,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703956481] [2021-10-16 03:11:14,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703956481] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:14,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:14,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-16 03:11:14,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803262925] [2021-10-16 03:11:14,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-16 03:11:14,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:14,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-16 03:11:14,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-16 03:11:14,631 INFO L87 Difference]: Start difference. First operand 5064 states and 14932 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:15,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:15,047 INFO L93 Difference]: Finished difference Result 5322 states and 15324 transitions. [2021-10-16 03:11:15,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-16 03:11:15,048 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:15,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:15,059 INFO L225 Difference]: With dead ends: 5322 [2021-10-16 03:11:15,059 INFO L226 Difference]: Without dead ends: 5284 [2021-10-16 03:11:15,059 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 128.9ms TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-10-16 03:11:15,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5284 states. [2021-10-16 03:11:15,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5284 to 5042. [2021-10-16 03:11:15,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5042 states, 5041 states have (on average 2.928387224756993) internal successors, (14762), 5041 states have internal predecessors, (14762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:15,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5042 states to 5042 states and 14762 transitions. [2021-10-16 03:11:15,160 INFO L78 Accepts]: Start accepts. Automaton has 5042 states and 14762 transitions. Word has length 38 [2021-10-16 03:11:15,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:15,161 INFO L470 AbstractCegarLoop]: Abstraction has 5042 states and 14762 transitions. [2021-10-16 03:11:15,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:15,162 INFO L276 IsEmpty]: Start isEmpty. Operand 5042 states and 14762 transitions. [2021-10-16 03:11:15,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:15,169 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:15,170 INFO L512 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] [2021-10-16 03:11:15,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-10-16 03:11:15,170 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:15,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:15,170 INFO L82 PathProgramCache]: Analyzing trace with hash -932526841, now seen corresponding path program 89 times [2021-10-16 03:11:15,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:15,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427460334] [2021-10-16 03:11:15,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:15,171 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:15,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:15,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:15,307 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:15,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427460334] [2021-10-16 03:11:15,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427460334] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:15,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:15,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:11:15,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130861932] [2021-10-16 03:11:15,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:11:15,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:15,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:11:15,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:11:15,309 INFO L87 Difference]: Start difference. First operand 5042 states and 14762 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:16,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:16,290 INFO L93 Difference]: Finished difference Result 7090 states and 19895 transitions. [2021-10-16 03:11:16,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-16 03:11:16,298 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:16,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:16,314 INFO L225 Difference]: With dead ends: 7090 [2021-10-16 03:11:16,314 INFO L226 Difference]: Without dead ends: 7022 [2021-10-16 03:11:16,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 300.4ms TimeCoverageRelationStatistics Valid=210, Invalid=720, Unknown=0, NotChecked=0, Total=930 [2021-10-16 03:11:16,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7022 states. [2021-10-16 03:11:16,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7022 to 5042. [2021-10-16 03:11:16,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5042 states, 5041 states have (on average 2.9242213846459038) internal successors, (14741), 5041 states have internal predecessors, (14741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:16,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5042 states to 5042 states and 14741 transitions. [2021-10-16 03:11:16,468 INFO L78 Accepts]: Start accepts. Automaton has 5042 states and 14741 transitions. Word has length 38 [2021-10-16 03:11:16,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:16,468 INFO L470 AbstractCegarLoop]: Abstraction has 5042 states and 14741 transitions. [2021-10-16 03:11:16,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:16,469 INFO L276 IsEmpty]: Start isEmpty. Operand 5042 states and 14741 transitions. [2021-10-16 03:11:16,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:16,476 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:16,476 INFO L512 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] [2021-10-16 03:11:16,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-10-16 03:11:16,476 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:16,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:16,477 INFO L82 PathProgramCache]: Analyzing trace with hash -516556877, now seen corresponding path program 90 times [2021-10-16 03:11:16,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:16,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570054712] [2021-10-16 03:11:16,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:16,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:16,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:16,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:16,634 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:16,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570054712] [2021-10-16 03:11:16,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570054712] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:16,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:16,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:11:16,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34157503] [2021-10-16 03:11:16,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:11:16,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:16,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:11:16,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:11:16,636 INFO L87 Difference]: Start difference. First operand 5042 states and 14741 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:17,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:17,752 INFO L93 Difference]: Finished difference Result 7234 states and 20198 transitions. [2021-10-16 03:11:17,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-16 03:11:17,753 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:17,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:17,767 INFO L225 Difference]: With dead ends: 7234 [2021-10-16 03:11:17,767 INFO L226 Difference]: Without dead ends: 7112 [2021-10-16 03:11:17,767 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 373.4ms TimeCoverageRelationStatistics Valid=292, Invalid=1114, Unknown=0, NotChecked=0, Total=1406 [2021-10-16 03:11:17,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7112 states. [2021-10-16 03:11:17,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7112 to 4852. [2021-10-16 03:11:17,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4852 states, 4851 states have (on average 2.932178932178932) internal successors, (14224), 4851 states have internal predecessors, (14224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:17,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4852 states to 4852 states and 14224 transitions. [2021-10-16 03:11:17,879 INFO L78 Accepts]: Start accepts. Automaton has 4852 states and 14224 transitions. Word has length 38 [2021-10-16 03:11:17,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:17,879 INFO L470 AbstractCegarLoop]: Abstraction has 4852 states and 14224 transitions. [2021-10-16 03:11:17,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:17,879 INFO L276 IsEmpty]: Start isEmpty. Operand 4852 states and 14224 transitions. [2021-10-16 03:11:17,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:17,887 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:17,887 INFO L512 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] [2021-10-16 03:11:17,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-10-16 03:11:17,887 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:17,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:17,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1375303593, now seen corresponding path program 91 times [2021-10-16 03:11:17,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:17,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544247668] [2021-10-16 03:11:17,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:17,888 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:17,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:18,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:18,007 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:18,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544247668] [2021-10-16 03:11:18,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544247668] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:18,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:18,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-16 03:11:18,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527192977] [2021-10-16 03:11:18,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-16 03:11:18,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:18,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-16 03:11:18,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-10-16 03:11:18,009 INFO L87 Difference]: Start difference. First operand 4852 states and 14224 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:19,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:19,062 INFO L93 Difference]: Finished difference Result 6376 states and 17890 transitions. [2021-10-16 03:11:19,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-16 03:11:19,063 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:19,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:19,081 INFO L225 Difference]: With dead ends: 6376 [2021-10-16 03:11:19,082 INFO L226 Difference]: Without dead ends: 6288 [2021-10-16 03:11:19,082 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 377.1ms TimeCoverageRelationStatistics Valid=330, Invalid=1152, Unknown=0, NotChecked=0, Total=1482 [2021-10-16 03:11:19,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6288 states. [2021-10-16 03:11:19,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6288 to 4800. [2021-10-16 03:11:19,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4800 states, 4799 states have (on average 2.9331110648051677) internal successors, (14076), 4799 states have internal predecessors, (14076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:19,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4800 states to 4800 states and 14076 transitions. [2021-10-16 03:11:19,231 INFO L78 Accepts]: Start accepts. Automaton has 4800 states and 14076 transitions. Word has length 38 [2021-10-16 03:11:19,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:19,232 INFO L470 AbstractCegarLoop]: Abstraction has 4800 states and 14076 transitions. [2021-10-16 03:11:19,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:19,232 INFO L276 IsEmpty]: Start isEmpty. Operand 4800 states and 14076 transitions. [2021-10-16 03:11:19,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:19,243 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:19,243 INFO L512 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] [2021-10-16 03:11:19,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-10-16 03:11:19,244 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:19,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:19,244 INFO L82 PathProgramCache]: Analyzing trace with hash -888585281, now seen corresponding path program 92 times [2021-10-16 03:11:19,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:19,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224790451] [2021-10-16 03:11:19,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:19,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:19,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:19,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:19,368 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:19,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224790451] [2021-10-16 03:11:19,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224790451] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:19,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:19,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-16 03:11:19,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773990178] [2021-10-16 03:11:19,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-16 03:11:19,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:19,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-16 03:11:19,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-10-16 03:11:19,370 INFO L87 Difference]: Start difference. First operand 4800 states and 14076 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:20,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:20,149 INFO L93 Difference]: Finished difference Result 5494 states and 15717 transitions. [2021-10-16 03:11:20,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-16 03:11:20,149 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:20,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:20,159 INFO L225 Difference]: With dead ends: 5494 [2021-10-16 03:11:20,160 INFO L226 Difference]: Without dead ends: 5380 [2021-10-16 03:11:20,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 258.5ms TimeCoverageRelationStatistics Valid=222, Invalid=708, Unknown=0, NotChecked=0, Total=930 [2021-10-16 03:11:20,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5380 states. [2021-10-16 03:11:20,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5380 to 4800. [2021-10-16 03:11:20,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4800 states, 4799 states have (on average 2.9364450927276518) internal successors, (14092), 4799 states have internal predecessors, (14092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:20,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4800 states to 4800 states and 14092 transitions. [2021-10-16 03:11:20,261 INFO L78 Accepts]: Start accepts. Automaton has 4800 states and 14092 transitions. Word has length 38 [2021-10-16 03:11:20,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:20,262 INFO L470 AbstractCegarLoop]: Abstraction has 4800 states and 14092 transitions. [2021-10-16 03:11:20,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:20,262 INFO L276 IsEmpty]: Start isEmpty. Operand 4800 states and 14092 transitions. [2021-10-16 03:11:20,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:20,269 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:20,269 INFO L512 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] [2021-10-16 03:11:20,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-10-16 03:11:20,269 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:20,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:20,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1930180879, now seen corresponding path program 93 times [2021-10-16 03:11:20,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:20,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584304675] [2021-10-16 03:11:20,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:20,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:20,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:20,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:20,373 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:20,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584304675] [2021-10-16 03:11:20,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584304675] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:20,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:20,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-16 03:11:20,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268054322] [2021-10-16 03:11:20,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 03:11:20,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:20,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 03:11:20,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:11:20,374 INFO L87 Difference]: Start difference. First operand 4800 states and 14092 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:20,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:20,964 INFO L93 Difference]: Finished difference Result 6294 states and 17716 transitions. [2021-10-16 03:11:20,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-16 03:11:20,965 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:20,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:20,977 INFO L225 Difference]: With dead ends: 6294 [2021-10-16 03:11:20,977 INFO L226 Difference]: Without dead ends: 6282 [2021-10-16 03:11:20,978 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 197.7ms TimeCoverageRelationStatistics Valid=151, Invalid=401, Unknown=0, NotChecked=0, Total=552 [2021-10-16 03:11:20,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6282 states. [2021-10-16 03:11:21,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6282 to 4806. [2021-10-16 03:11:21,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4806 states, 4805 states have (on average 2.936732570239334) internal successors, (14111), 4805 states have internal predecessors, (14111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:21,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4806 states to 4806 states and 14111 transitions. [2021-10-16 03:11:21,081 INFO L78 Accepts]: Start accepts. Automaton has 4806 states and 14111 transitions. Word has length 38 [2021-10-16 03:11:21,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:21,081 INFO L470 AbstractCegarLoop]: Abstraction has 4806 states and 14111 transitions. [2021-10-16 03:11:21,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:21,082 INFO L276 IsEmpty]: Start isEmpty. Operand 4806 states and 14111 transitions. [2021-10-16 03:11:21,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:21,089 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:21,089 INFO L512 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] [2021-10-16 03:11:21,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-10-16 03:11:21,089 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:21,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:21,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1968359791, now seen corresponding path program 94 times [2021-10-16 03:11:21,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:21,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278375454] [2021-10-16 03:11:21,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:21,091 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:21,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:21,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:21,230 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:21,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278375454] [2021-10-16 03:11:21,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278375454] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:21,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:21,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:11:21,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055639372] [2021-10-16 03:11:21,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:11:21,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:21,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:11:21,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:11:21,231 INFO L87 Difference]: Start difference. First operand 4806 states and 14111 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:22,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:22,102 INFO L93 Difference]: Finished difference Result 6242 states and 17601 transitions. [2021-10-16 03:11:22,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-16 03:11:22,103 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:22,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:22,120 INFO L225 Difference]: With dead ends: 6242 [2021-10-16 03:11:22,120 INFO L226 Difference]: Without dead ends: 6196 [2021-10-16 03:11:22,121 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 252.3ms TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2021-10-16 03:11:22,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6196 states. [2021-10-16 03:11:22,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6196 to 4796. [2021-10-16 03:11:22,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4796 states, 4795 states have (on average 2.9363920750782064) internal successors, (14080), 4795 states have internal predecessors, (14080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:22,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4796 states to 4796 states and 14080 transitions. [2021-10-16 03:11:22,310 INFO L78 Accepts]: Start accepts. Automaton has 4796 states and 14080 transitions. Word has length 38 [2021-10-16 03:11:22,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:22,310 INFO L470 AbstractCegarLoop]: Abstraction has 4796 states and 14080 transitions. [2021-10-16 03:11:22,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:22,310 INFO L276 IsEmpty]: Start isEmpty. Operand 4796 states and 14080 transitions. [2021-10-16 03:11:22,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:22,318 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:22,318 INFO L512 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] [2021-10-16 03:11:22,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-10-16 03:11:22,318 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:22,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:22,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1361347909, now seen corresponding path program 95 times [2021-10-16 03:11:22,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:22,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725990612] [2021-10-16 03:11:22,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:22,319 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:22,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:22,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:22,455 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:22,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725990612] [2021-10-16 03:11:22,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725990612] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:22,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:22,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-16 03:11:22,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910948027] [2021-10-16 03:11:22,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 03:11:22,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:22,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 03:11:22,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:11:22,457 INFO L87 Difference]: Start difference. First operand 4796 states and 14080 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:23,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:23,048 INFO L93 Difference]: Finished difference Result 6230 states and 17638 transitions. [2021-10-16 03:11:23,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-16 03:11:23,048 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:23,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:23,060 INFO L225 Difference]: With dead ends: 6230 [2021-10-16 03:11:23,060 INFO L226 Difference]: Without dead ends: 6218 [2021-10-16 03:11:23,060 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 187.3ms TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2021-10-16 03:11:23,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6218 states. [2021-10-16 03:11:23,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6218 to 4786. [2021-10-16 03:11:23,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4786 states, 4785 states have (on average 2.9347962382445143) internal successors, (14043), 4785 states have internal predecessors, (14043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:23,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4786 states to 4786 states and 14043 transitions. [2021-10-16 03:11:23,156 INFO L78 Accepts]: Start accepts. Automaton has 4786 states and 14043 transitions. Word has length 38 [2021-10-16 03:11:23,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:23,157 INFO L470 AbstractCegarLoop]: Abstraction has 4786 states and 14043 transitions. [2021-10-16 03:11:23,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:23,157 INFO L276 IsEmpty]: Start isEmpty. Operand 4786 states and 14043 transitions. [2021-10-16 03:11:23,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:23,164 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:23,164 INFO L512 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] [2021-10-16 03:11:23,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-10-16 03:11:23,164 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:23,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:23,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1862805551, now seen corresponding path program 96 times [2021-10-16 03:11:23,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:23,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131629327] [2021-10-16 03:11:23,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:23,165 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:23,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:23,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:23,265 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:23,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131629327] [2021-10-16 03:11:23,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131629327] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:23,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:23,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:11:23,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669084536] [2021-10-16 03:11:23,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:11:23,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:23,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:11:23,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:11:23,267 INFO L87 Difference]: Start difference. First operand 4786 states and 14043 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:24,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:24,075 INFO L93 Difference]: Finished difference Result 6354 states and 17843 transitions. [2021-10-16 03:11:24,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-16 03:11:24,075 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:24,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:24,092 INFO L225 Difference]: With dead ends: 6354 [2021-10-16 03:11:24,092 INFO L226 Difference]: Without dead ends: 6346 [2021-10-16 03:11:24,092 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 281.9ms TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2021-10-16 03:11:24,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6346 states. [2021-10-16 03:11:24,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6346 to 4782. [2021-10-16 03:11:24,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4782 states, 4781 states have (on average 2.9351600083664504) internal successors, (14033), 4781 states have internal predecessors, (14033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:24,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4782 states to 4782 states and 14033 transitions. [2021-10-16 03:11:24,203 INFO L78 Accepts]: Start accepts. Automaton has 4782 states and 14033 transitions. Word has length 38 [2021-10-16 03:11:24,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:24,203 INFO L470 AbstractCegarLoop]: Abstraction has 4782 states and 14033 transitions. [2021-10-16 03:11:24,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:24,204 INFO L276 IsEmpty]: Start isEmpty. Operand 4782 states and 14033 transitions. [2021-10-16 03:11:24,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:24,210 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:24,210 INFO L512 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] [2021-10-16 03:11:24,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-10-16 03:11:24,211 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:24,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:24,211 INFO L82 PathProgramCache]: Analyzing trace with hash 733093013, now seen corresponding path program 97 times [2021-10-16 03:11:24,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:24,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268138509] [2021-10-16 03:11:24,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:24,211 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:24,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:24,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:24,341 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:24,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268138509] [2021-10-16 03:11:24,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268138509] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:24,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:24,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:11:24,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669121604] [2021-10-16 03:11:24,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:11:24,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:24,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:11:24,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:11:24,343 INFO L87 Difference]: Start difference. First operand 4782 states and 14033 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:24,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:24,940 INFO L93 Difference]: Finished difference Result 6110 states and 17319 transitions. [2021-10-16 03:11:24,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-16 03:11:24,940 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:24,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:24,951 INFO L225 Difference]: With dead ends: 6110 [2021-10-16 03:11:24,951 INFO L226 Difference]: Without dead ends: 6066 [2021-10-16 03:11:24,951 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 187.8ms TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2021-10-16 03:11:24,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6066 states. [2021-10-16 03:11:25,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6066 to 4762. [2021-10-16 03:11:25,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4762 states, 4761 states have (on average 2.93026675068263) internal successors, (13951), 4761 states have internal predecessors, (13951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:25,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4762 states to 4762 states and 13951 transitions. [2021-10-16 03:11:25,046 INFO L78 Accepts]: Start accepts. Automaton has 4762 states and 13951 transitions. Word has length 38 [2021-10-16 03:11:25,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:25,046 INFO L470 AbstractCegarLoop]: Abstraction has 4762 states and 13951 transitions. [2021-10-16 03:11:25,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:25,047 INFO L276 IsEmpty]: Start isEmpty. Operand 4762 states and 13951 transitions. [2021-10-16 03:11:25,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:25,053 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:25,053 INFO L512 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] [2021-10-16 03:11:25,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-10-16 03:11:25,054 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:25,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:25,054 INFO L82 PathProgramCache]: Analyzing trace with hash 58705803, now seen corresponding path program 98 times [2021-10-16 03:11:25,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:25,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357425447] [2021-10-16 03:11:25,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:25,054 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:25,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:25,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:25,187 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:25,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357425447] [2021-10-16 03:11:25,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357425447] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:25,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:25,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:11:25,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296326496] [2021-10-16 03:11:25,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:11:25,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:25,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:11:25,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:11:25,189 INFO L87 Difference]: Start difference. First operand 4762 states and 13951 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:25,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:25,978 INFO L93 Difference]: Finished difference Result 6316 states and 17732 transitions. [2021-10-16 03:11:25,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-16 03:11:25,978 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:25,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:25,989 INFO L225 Difference]: With dead ends: 6316 [2021-10-16 03:11:25,990 INFO L226 Difference]: Without dead ends: 6278 [2021-10-16 03:11:25,990 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 270.1ms TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2021-10-16 03:11:25,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6278 states. [2021-10-16 03:11:26,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6278 to 4750. [2021-10-16 03:11:26,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4750 states, 4749 states have (on average 2.9330385344283005) internal successors, (13929), 4749 states have internal predecessors, (13929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:26,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4750 states to 4750 states and 13929 transitions. [2021-10-16 03:11:26,087 INFO L78 Accepts]: Start accepts. Automaton has 4750 states and 13929 transitions. Word has length 38 [2021-10-16 03:11:26,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:26,087 INFO L470 AbstractCegarLoop]: Abstraction has 4750 states and 13929 transitions. [2021-10-16 03:11:26,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:26,087 INFO L276 IsEmpty]: Start isEmpty. Operand 4750 states and 13929 transitions. [2021-10-16 03:11:26,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:26,094 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:26,094 INFO L512 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] [2021-10-16 03:11:26,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-10-16 03:11:26,094 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:26,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:26,095 INFO L82 PathProgramCache]: Analyzing trace with hash 546338677, now seen corresponding path program 99 times [2021-10-16 03:11:26,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:26,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289887813] [2021-10-16 03:11:26,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:26,095 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:26,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:26,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:26,208 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:26,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289887813] [2021-10-16 03:11:26,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289887813] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:26,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:26,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-16 03:11:26,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321931329] [2021-10-16 03:11:26,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 03:11:26,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:26,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 03:11:26,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:11:26,211 INFO L87 Difference]: Start difference. First operand 4750 states and 13929 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:26,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:26,911 INFO L93 Difference]: Finished difference Result 6186 states and 17345 transitions. [2021-10-16 03:11:26,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-16 03:11:26,912 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:26,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:26,923 INFO L225 Difference]: With dead ends: 6186 [2021-10-16 03:11:26,923 INFO L226 Difference]: Without dead ends: 5860 [2021-10-16 03:11:26,923 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 211.2ms TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2021-10-16 03:11:26,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5860 states. [2021-10-16 03:11:26,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5860 to 4768. [2021-10-16 03:11:27,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4768 states, 4767 states have (on average 2.931193622823579) internal successors, (13973), 4767 states have internal predecessors, (13973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:27,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4768 states to 4768 states and 13973 transitions. [2021-10-16 03:11:27,015 INFO L78 Accepts]: Start accepts. Automaton has 4768 states and 13973 transitions. Word has length 38 [2021-10-16 03:11:27,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:27,015 INFO L470 AbstractCegarLoop]: Abstraction has 4768 states and 13973 transitions. [2021-10-16 03:11:27,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:27,015 INFO L276 IsEmpty]: Start isEmpty. Operand 4768 states and 13973 transitions. [2021-10-16 03:11:27,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:27,022 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:27,022 INFO L512 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] [2021-10-16 03:11:27,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-10-16 03:11:27,022 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:27,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:27,023 INFO L82 PathProgramCache]: Analyzing trace with hash 463613039, now seen corresponding path program 100 times [2021-10-16 03:11:27,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:27,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631724473] [2021-10-16 03:11:27,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:27,023 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:27,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:27,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:27,154 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:27,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631724473] [2021-10-16 03:11:27,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631724473] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:27,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:27,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:11:27,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84953235] [2021-10-16 03:11:27,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:11:27,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:27,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:11:27,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:11:27,160 INFO L87 Difference]: Start difference. First operand 4768 states and 13973 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:27,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:27,956 INFO L93 Difference]: Finished difference Result 6110 states and 17148 transitions. [2021-10-16 03:11:27,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-16 03:11:27,957 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:27,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:27,968 INFO L225 Difference]: With dead ends: 6110 [2021-10-16 03:11:27,968 INFO L226 Difference]: Without dead ends: 6094 [2021-10-16 03:11:27,968 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 361.0ms TimeCoverageRelationStatistics Valid=343, Invalid=1063, Unknown=0, NotChecked=0, Total=1406 [2021-10-16 03:11:27,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6094 states. [2021-10-16 03:11:28,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6094 to 4772. [2021-10-16 03:11:28,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4772 states, 4771 states have (on average 2.930412911339342) internal successors, (13981), 4771 states have internal predecessors, (13981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:28,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4772 states to 4772 states and 13981 transitions. [2021-10-16 03:11:28,060 INFO L78 Accepts]: Start accepts. Automaton has 4772 states and 13981 transitions. Word has length 38 [2021-10-16 03:11:28,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:28,060 INFO L470 AbstractCegarLoop]: Abstraction has 4772 states and 13981 transitions. [2021-10-16 03:11:28,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:28,060 INFO L276 IsEmpty]: Start isEmpty. Operand 4772 states and 13981 transitions. [2021-10-16 03:11:28,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:28,067 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:28,067 INFO L512 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] [2021-10-16 03:11:28,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-10-16 03:11:28,067 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:28,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:28,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1648541131, now seen corresponding path program 101 times [2021-10-16 03:11:28,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:28,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568583586] [2021-10-16 03:11:28,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:28,068 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:28,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:28,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:28,219 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:28,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568583586] [2021-10-16 03:11:28,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568583586] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:28,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:28,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-16 03:11:28,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071849641] [2021-10-16 03:11:28,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-16 03:11:28,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:28,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-16 03:11:28,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-10-16 03:11:28,222 INFO L87 Difference]: Start difference. First operand 4772 states and 13981 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:29,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:29,099 INFO L93 Difference]: Finished difference Result 6714 states and 18739 transitions. [2021-10-16 03:11:29,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-16 03:11:29,100 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:29,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:29,111 INFO L225 Difference]: With dead ends: 6714 [2021-10-16 03:11:29,111 INFO L226 Difference]: Without dead ends: 6654 [2021-10-16 03:11:29,111 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 333.1ms TimeCoverageRelationStatistics Valid=305, Invalid=1101, Unknown=0, NotChecked=0, Total=1406 [2021-10-16 03:11:29,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6654 states. [2021-10-16 03:11:29,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6654 to 4796. [2021-10-16 03:11:29,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4796 states, 4795 states have (on average 2.9288842544316998) internal successors, (14044), 4795 states have internal predecessors, (14044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:29,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4796 states to 4796 states and 14044 transitions. [2021-10-16 03:11:29,205 INFO L78 Accepts]: Start accepts. Automaton has 4796 states and 14044 transitions. Word has length 38 [2021-10-16 03:11:29,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:29,205 INFO L470 AbstractCegarLoop]: Abstraction has 4796 states and 14044 transitions. [2021-10-16 03:11:29,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:29,205 INFO L276 IsEmpty]: Start isEmpty. Operand 4796 states and 14044 transitions. [2021-10-16 03:11:29,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:29,211 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:29,211 INFO L512 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] [2021-10-16 03:11:29,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-10-16 03:11:29,212 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:29,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:29,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1750203705, now seen corresponding path program 102 times [2021-10-16 03:11:29,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:29,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357575836] [2021-10-16 03:11:29,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:29,212 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:29,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:29,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:29,316 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:29,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357575836] [2021-10-16 03:11:29,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357575836] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:29,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:29,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-16 03:11:29,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90029982] [2021-10-16 03:11:29,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 03:11:29,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:29,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 03:11:29,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:11:29,318 INFO L87 Difference]: Start difference. First operand 4796 states and 14044 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:29,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:29,803 INFO L93 Difference]: Finished difference Result 5406 states and 15454 transitions. [2021-10-16 03:11:29,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-16 03:11:29,803 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:29,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:29,813 INFO L225 Difference]: With dead ends: 5406 [2021-10-16 03:11:29,813 INFO L226 Difference]: Without dead ends: 5068 [2021-10-16 03:11:29,814 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 119.6ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-10-16 03:11:29,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5068 states. [2021-10-16 03:11:29,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5068 to 4514. [2021-10-16 03:11:29,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4514 states, 4513 states have (on average 2.9375138488810104) internal successors, (13257), 4513 states have internal predecessors, (13257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:29,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4514 states to 4514 states and 13257 transitions. [2021-10-16 03:11:29,901 INFO L78 Accepts]: Start accepts. Automaton has 4514 states and 13257 transitions. Word has length 38 [2021-10-16 03:11:29,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:29,901 INFO L470 AbstractCegarLoop]: Abstraction has 4514 states and 13257 transitions. [2021-10-16 03:11:29,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:29,901 INFO L276 IsEmpty]: Start isEmpty. Operand 4514 states and 13257 transitions. [2021-10-16 03:11:29,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:29,908 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:29,908 INFO L512 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] [2021-10-16 03:11:29,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-10-16 03:11:29,908 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:29,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:29,908 INFO L82 PathProgramCache]: Analyzing trace with hash -454310245, now seen corresponding path program 103 times [2021-10-16 03:11:29,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:29,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115861199] [2021-10-16 03:11:29,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:29,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:29,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:30,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:30,040 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:30,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115861199] [2021-10-16 03:11:30,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115861199] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:30,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:30,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:11:30,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645788106] [2021-10-16 03:11:30,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:11:30,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:30,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:11:30,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:11:30,042 INFO L87 Difference]: Start difference. First operand 4514 states and 13257 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:30,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:30,862 INFO L93 Difference]: Finished difference Result 5516 states and 15570 transitions. [2021-10-16 03:11:30,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-16 03:11:30,863 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:30,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:30,873 INFO L225 Difference]: With dead ends: 5516 [2021-10-16 03:11:30,873 INFO L226 Difference]: Without dead ends: 5488 [2021-10-16 03:11:30,874 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 243.4ms TimeCoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2021-10-16 03:11:30,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5488 states. [2021-10-16 03:11:30,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5488 to 4544. [2021-10-16 03:11:30,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4544 states, 4543 states have (on average 2.9315430332379484) internal successors, (13318), 4543 states have internal predecessors, (13318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:30,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4544 states to 4544 states and 13318 transitions. [2021-10-16 03:11:30,964 INFO L78 Accepts]: Start accepts. Automaton has 4544 states and 13318 transitions. Word has length 38 [2021-10-16 03:11:30,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:30,964 INFO L470 AbstractCegarLoop]: Abstraction has 4544 states and 13318 transitions. [2021-10-16 03:11:30,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:30,965 INFO L276 IsEmpty]: Start isEmpty. Operand 4544 states and 13318 transitions. [2021-10-16 03:11:30,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:30,971 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:30,971 INFO L512 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] [2021-10-16 03:11:30,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-10-16 03:11:30,971 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:30,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:30,972 INFO L82 PathProgramCache]: Analyzing trace with hash 52754119, now seen corresponding path program 104 times [2021-10-16 03:11:30,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:30,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541861509] [2021-10-16 03:11:30,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:30,972 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:30,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:31,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:31,085 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:31,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541861509] [2021-10-16 03:11:31,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541861509] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:31,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:31,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-16 03:11:31,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878200504] [2021-10-16 03:11:31,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 03:11:31,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:31,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 03:11:31,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:11:31,086 INFO L87 Difference]: Start difference. First operand 4544 states and 13318 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:31,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:31,796 INFO L93 Difference]: Finished difference Result 6352 states and 17800 transitions. [2021-10-16 03:11:31,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-16 03:11:31,796 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:31,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:31,809 INFO L225 Difference]: With dead ends: 6352 [2021-10-16 03:11:31,809 INFO L226 Difference]: Without dead ends: 6336 [2021-10-16 03:11:31,809 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 219.5ms TimeCoverageRelationStatistics Valid=191, Invalid=565, Unknown=0, NotChecked=0, Total=756 [2021-10-16 03:11:31,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6336 states. [2021-10-16 03:11:31,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6336 to 4540. [2021-10-16 03:11:31,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4540 states, 4539 states have (on average 2.931482705441727) internal successors, (13306), 4539 states have internal predecessors, (13306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:31,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4540 states to 4540 states and 13306 transitions. [2021-10-16 03:11:31,906 INFO L78 Accepts]: Start accepts. Automaton has 4540 states and 13306 transitions. Word has length 38 [2021-10-16 03:11:31,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:31,906 INFO L470 AbstractCegarLoop]: Abstraction has 4540 states and 13306 transitions. [2021-10-16 03:11:31,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:31,906 INFO L276 IsEmpty]: Start isEmpty. Operand 4540 states and 13306 transitions. [2021-10-16 03:11:31,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:31,912 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:31,912 INFO L512 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] [2021-10-16 03:11:31,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2021-10-16 03:11:31,913 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:31,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:31,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1018059717, now seen corresponding path program 105 times [2021-10-16 03:11:31,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:31,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902321066] [2021-10-16 03:11:31,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:31,913 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:31,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:32,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:32,042 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:32,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902321066] [2021-10-16 03:11:32,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902321066] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:32,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:32,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:11:32,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488431726] [2021-10-16 03:11:32,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:11:32,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:32,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:11:32,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:11:32,044 INFO L87 Difference]: Start difference. First operand 4540 states and 13306 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:32,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:32,886 INFO L93 Difference]: Finished difference Result 6502 states and 18116 transitions. [2021-10-16 03:11:32,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-16 03:11:32,887 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:32,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:32,899 INFO L225 Difference]: With dead ends: 6502 [2021-10-16 03:11:32,899 INFO L226 Difference]: Without dead ends: 6466 [2021-10-16 03:11:32,900 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 302.3ms TimeCoverageRelationStatistics Valid=273, Invalid=917, Unknown=0, NotChecked=0, Total=1190 [2021-10-16 03:11:32,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6466 states. [2021-10-16 03:11:33,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6466 to 4508. [2021-10-16 03:11:33,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4508 states, 4507 states have (on average 2.9345462613712003) internal successors, (13226), 4507 states have internal predecessors, (13226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:33,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4508 states to 4508 states and 13226 transitions. [2021-10-16 03:11:33,043 INFO L78 Accepts]: Start accepts. Automaton has 4508 states and 13226 transitions. Word has length 38 [2021-10-16 03:11:33,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:33,043 INFO L470 AbstractCegarLoop]: Abstraction has 4508 states and 13226 transitions. [2021-10-16 03:11:33,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:33,044 INFO L276 IsEmpty]: Start isEmpty. Operand 4508 states and 13226 transitions. [2021-10-16 03:11:33,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:33,050 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:33,050 INFO L512 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] [2021-10-16 03:11:33,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2021-10-16 03:11:33,050 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:33,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:33,051 INFO L82 PathProgramCache]: Analyzing trace with hash -271805531, now seen corresponding path program 106 times [2021-10-16 03:11:33,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:33,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750942357] [2021-10-16 03:11:33,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:33,052 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:33,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:33,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:33,174 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:33,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750942357] [2021-10-16 03:11:33,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750942357] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:33,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:33,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:11:33,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218447691] [2021-10-16 03:11:33,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:11:33,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:33,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:11:33,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:11:33,175 INFO L87 Difference]: Start difference. First operand 4508 states and 13226 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:34,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:34,007 INFO L93 Difference]: Finished difference Result 5630 states and 15767 transitions. [2021-10-16 03:11:34,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-16 03:11:34,007 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:34,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:34,018 INFO L225 Difference]: With dead ends: 5630 [2021-10-16 03:11:34,018 INFO L226 Difference]: Without dead ends: 5598 [2021-10-16 03:11:34,018 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 301.3ms TimeCoverageRelationStatistics Valid=278, Invalid=844, Unknown=0, NotChecked=0, Total=1122 [2021-10-16 03:11:34,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5598 states. [2021-10-16 03:11:34,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5598 to 4520. [2021-10-16 03:11:34,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4520 states, 4519 states have (on average 2.931179464483293) internal successors, (13246), 4519 states have internal predecessors, (13246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:34,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4520 states to 4520 states and 13246 transitions. [2021-10-16 03:11:34,112 INFO L78 Accepts]: Start accepts. Automaton has 4520 states and 13246 transitions. Word has length 38 [2021-10-16 03:11:34,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:34,113 INFO L470 AbstractCegarLoop]: Abstraction has 4520 states and 13246 transitions. [2021-10-16 03:11:34,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:34,113 INFO L276 IsEmpty]: Start isEmpty. Operand 4520 states and 13246 transitions. [2021-10-16 03:11:34,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:34,120 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:34,120 INFO L512 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] [2021-10-16 03:11:34,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2021-10-16 03:11:34,120 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:34,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:34,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1604452597, now seen corresponding path program 107 times [2021-10-16 03:11:34,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:34,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465070644] [2021-10-16 03:11:34,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:34,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:34,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:34,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:34,251 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:34,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465070644] [2021-10-16 03:11:34,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465070644] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:34,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:34,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:11:34,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135471950] [2021-10-16 03:11:34,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:11:34,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:34,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:11:34,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:11:34,253 INFO L87 Difference]: Start difference. First operand 4520 states and 13246 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:34,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:34,860 INFO L93 Difference]: Finished difference Result 4878 states and 13964 transitions. [2021-10-16 03:11:34,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-16 03:11:34,861 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:34,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:34,870 INFO L225 Difference]: With dead ends: 4878 [2021-10-16 03:11:34,870 INFO L226 Difference]: Without dead ends: 4836 [2021-10-16 03:11:34,871 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 219.4ms TimeCoverageRelationStatistics Valid=190, Invalid=512, Unknown=0, NotChecked=0, Total=702 [2021-10-16 03:11:34,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4836 states. [2021-10-16 03:11:34,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4836 to 4502. [2021-10-16 03:11:34,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4502 states, 4501 states have (on average 2.9320151077538323) internal successors, (13197), 4501 states have internal predecessors, (13197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:34,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4502 states to 4502 states and 13197 transitions. [2021-10-16 03:11:34,963 INFO L78 Accepts]: Start accepts. Automaton has 4502 states and 13197 transitions. Word has length 38 [2021-10-16 03:11:34,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:34,964 INFO L470 AbstractCegarLoop]: Abstraction has 4502 states and 13197 transitions. [2021-10-16 03:11:34,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:34,964 INFO L276 IsEmpty]: Start isEmpty. Operand 4502 states and 13197 transitions. [2021-10-16 03:11:34,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:34,970 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:34,971 INFO L512 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] [2021-10-16 03:11:34,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-10-16 03:11:34,971 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:34,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:34,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1428244927, now seen corresponding path program 108 times [2021-10-16 03:11:34,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:34,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64147684] [2021-10-16 03:11:34,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:34,972 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:34,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:35,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:35,116 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:35,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64147684] [2021-10-16 03:11:35,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64147684] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:35,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:35,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:11:35,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131751544] [2021-10-16 03:11:35,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:11:35,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:35,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:11:35,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:11:35,118 INFO L87 Difference]: Start difference. First operand 4502 states and 13197 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:36,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:36,034 INFO L93 Difference]: Finished difference Result 5554 states and 15625 transitions. [2021-10-16 03:11:36,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-16 03:11:36,034 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:36,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:36,045 INFO L225 Difference]: With dead ends: 5554 [2021-10-16 03:11:36,045 INFO L226 Difference]: Without dead ends: 5496 [2021-10-16 03:11:36,046 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 281.1ms TimeCoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2021-10-16 03:11:36,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5496 states. [2021-10-16 03:11:36,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5496 to 4532. [2021-10-16 03:11:36,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4532 states, 4531 states have (on average 2.9251820790112557) internal successors, (13254), 4531 states have internal predecessors, (13254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:36,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4532 states to 4532 states and 13254 transitions. [2021-10-16 03:11:36,141 INFO L78 Accepts]: Start accepts. Automaton has 4532 states and 13254 transitions. Word has length 38 [2021-10-16 03:11:36,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:36,141 INFO L470 AbstractCegarLoop]: Abstraction has 4532 states and 13254 transitions. [2021-10-16 03:11:36,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:36,142 INFO L276 IsEmpty]: Start isEmpty. Operand 4532 states and 13254 transitions. [2021-10-16 03:11:36,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:36,149 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:36,150 INFO L512 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] [2021-10-16 03:11:36,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-10-16 03:11:36,150 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:36,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:36,150 INFO L82 PathProgramCache]: Analyzing trace with hash -265217083, now seen corresponding path program 109 times [2021-10-16 03:11:36,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:36,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330731403] [2021-10-16 03:11:36,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:36,151 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:36,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:36,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:36,261 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:36,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330731403] [2021-10-16 03:11:36,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330731403] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:36,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:36,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:11:36,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123401905] [2021-10-16 03:11:36,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:11:36,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:36,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:11:36,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:11:36,263 INFO L87 Difference]: Start difference. First operand 4532 states and 13254 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:37,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:37,035 INFO L93 Difference]: Finished difference Result 6354 states and 17765 transitions. [2021-10-16 03:11:37,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-16 03:11:37,036 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:37,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:37,049 INFO L225 Difference]: With dead ends: 6354 [2021-10-16 03:11:37,049 INFO L226 Difference]: Without dead ends: 6310 [2021-10-16 03:11:37,049 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 242.4ms TimeCoverageRelationStatistics Valid=200, Invalid=670, Unknown=0, NotChecked=0, Total=870 [2021-10-16 03:11:37,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6310 states. [2021-10-16 03:11:37,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6310 to 4534. [2021-10-16 03:11:37,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4534 states, 4533 states have (on average 2.923670858151335) internal successors, (13253), 4533 states have internal predecessors, (13253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:37,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4534 states to 4534 states and 13253 transitions. [2021-10-16 03:11:37,153 INFO L78 Accepts]: Start accepts. Automaton has 4534 states and 13253 transitions. Word has length 38 [2021-10-16 03:11:37,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:37,153 INFO L470 AbstractCegarLoop]: Abstraction has 4534 states and 13253 transitions. [2021-10-16 03:11:37,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:37,153 INFO L276 IsEmpty]: Start isEmpty. Operand 4534 states and 13253 transitions. [2021-10-16 03:11:37,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:37,160 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:37,160 INFO L512 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] [2021-10-16 03:11:37,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2021-10-16 03:11:37,160 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:37,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:37,160 INFO L82 PathProgramCache]: Analyzing trace with hash -939604293, now seen corresponding path program 110 times [2021-10-16 03:11:37,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:37,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733878888] [2021-10-16 03:11:37,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:37,161 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:37,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:37,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:37,283 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:37,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733878888] [2021-10-16 03:11:37,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733878888] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:37,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:37,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:11:37,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047469089] [2021-10-16 03:11:37,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:11:37,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:37,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:11:37,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:11:37,284 INFO L87 Difference]: Start difference. First operand 4534 states and 13253 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:38,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:38,245 INFO L93 Difference]: Finished difference Result 6512 states and 18110 transitions. [2021-10-16 03:11:38,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-16 03:11:38,246 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:38,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:38,259 INFO L225 Difference]: With dead ends: 6512 [2021-10-16 03:11:38,259 INFO L226 Difference]: Without dead ends: 6448 [2021-10-16 03:11:38,259 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 339.7ms TimeCoverageRelationStatistics Valid=281, Invalid=1051, Unknown=0, NotChecked=0, Total=1332 [2021-10-16 03:11:38,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6448 states. [2021-10-16 03:11:38,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6448 to 4488. [2021-10-16 03:11:38,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4488 states, 4487 states have (on average 2.9277913973701803) internal successors, (13137), 4487 states have internal predecessors, (13137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:38,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4488 states to 4488 states and 13137 transitions. [2021-10-16 03:11:38,363 INFO L78 Accepts]: Start accepts. Automaton has 4488 states and 13137 transitions. Word has length 38 [2021-10-16 03:11:38,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:38,363 INFO L470 AbstractCegarLoop]: Abstraction has 4488 states and 13137 transitions. [2021-10-16 03:11:38,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:38,363 INFO L276 IsEmpty]: Start isEmpty. Operand 4488 states and 13137 transitions. [2021-10-16 03:11:38,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:38,370 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:38,370 INFO L512 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] [2021-10-16 03:11:38,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-10-16 03:11:38,370 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:38,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:38,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1008812251, now seen corresponding path program 111 times [2021-10-16 03:11:38,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:38,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131648043] [2021-10-16 03:11:38,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:38,371 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:38,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:38,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:38,487 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:38,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131648043] [2021-10-16 03:11:38,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131648043] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:38,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:38,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-16 03:11:38,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23112058] [2021-10-16 03:11:38,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-16 03:11:38,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:38,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-16 03:11:38,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-10-16 03:11:38,489 INFO L87 Difference]: Start difference. First operand 4488 states and 13137 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:39,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:39,373 INFO L93 Difference]: Finished difference Result 5922 states and 16539 transitions. [2021-10-16 03:11:39,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-16 03:11:39,374 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:39,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:39,384 INFO L225 Difference]: With dead ends: 5922 [2021-10-16 03:11:39,385 INFO L226 Difference]: Without dead ends: 5860 [2021-10-16 03:11:39,385 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 321.3ms TimeCoverageRelationStatistics Valid=284, Invalid=976, Unknown=0, NotChecked=0, Total=1260 [2021-10-16 03:11:39,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5860 states. [2021-10-16 03:11:39,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5860 to 4478. [2021-10-16 03:11:39,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4478 states, 4477 states have (on average 2.9251731069912887) internal successors, (13096), 4477 states have internal predecessors, (13096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:39,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4478 states to 4478 states and 13096 transitions. [2021-10-16 03:11:39,480 INFO L78 Accepts]: Start accepts. Automaton has 4478 states and 13096 transitions. Word has length 38 [2021-10-16 03:11:39,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:39,480 INFO L470 AbstractCegarLoop]: Abstraction has 4478 states and 13096 transitions. [2021-10-16 03:11:39,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:39,480 INFO L276 IsEmpty]: Start isEmpty. Operand 4478 states and 13096 transitions. [2021-10-16 03:11:39,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:39,487 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:39,487 INFO L512 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] [2021-10-16 03:11:39,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2021-10-16 03:11:39,488 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:39,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:39,488 INFO L82 PathProgramCache]: Analyzing trace with hash 768579887, now seen corresponding path program 112 times [2021-10-16 03:11:39,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:39,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364698344] [2021-10-16 03:11:39,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:39,489 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:39,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:39,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:39,596 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:39,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364698344] [2021-10-16 03:11:39,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364698344] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:39,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:39,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-16 03:11:39,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441584705] [2021-10-16 03:11:39,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-16 03:11:39,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:39,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-16 03:11:39,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-10-16 03:11:39,598 INFO L87 Difference]: Start difference. First operand 4478 states and 13096 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:40,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:40,260 INFO L93 Difference]: Finished difference Result 5156 states and 14729 transitions. [2021-10-16 03:11:40,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-16 03:11:40,260 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:40,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:40,270 INFO L225 Difference]: With dead ends: 5156 [2021-10-16 03:11:40,270 INFO L226 Difference]: Without dead ends: 5066 [2021-10-16 03:11:40,270 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 210.9ms TimeCoverageRelationStatistics Valid=181, Invalid=575, Unknown=0, NotChecked=0, Total=756 [2021-10-16 03:11:40,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5066 states. [2021-10-16 03:11:40,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5066 to 4446. [2021-10-16 03:11:40,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4446 states, 4445 states have (on average 2.9372328458942634) internal successors, (13056), 4445 states have internal predecessors, (13056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:40,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4446 states to 4446 states and 13056 transitions. [2021-10-16 03:11:40,365 INFO L78 Accepts]: Start accepts. Automaton has 4446 states and 13056 transitions. Word has length 38 [2021-10-16 03:11:40,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:40,365 INFO L470 AbstractCegarLoop]: Abstraction has 4446 states and 13056 transitions. [2021-10-16 03:11:40,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:40,365 INFO L276 IsEmpty]: Start isEmpty. Operand 4446 states and 13056 transitions. [2021-10-16 03:11:40,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:40,372 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:40,372 INFO L512 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] [2021-10-16 03:11:40,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-10-16 03:11:40,373 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:40,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:40,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1973395073, now seen corresponding path program 113 times [2021-10-16 03:11:40,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:40,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272738491] [2021-10-16 03:11:40,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:40,373 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:40,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:40,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:40,433 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:40,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272738491] [2021-10-16 03:11:40,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272738491] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:40,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:40,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-16 03:11:40,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804020540] [2021-10-16 03:11:40,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 03:11:40,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:40,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 03:11:40,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-16 03:11:40,435 INFO L87 Difference]: Start difference. First operand 4446 states and 13056 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:40,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:40,551 INFO L93 Difference]: Finished difference Result 4238 states and 12242 transitions. [2021-10-16 03:11:40,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 03:11:40,552 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:40,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:40,560 INFO L225 Difference]: With dead ends: 4238 [2021-10-16 03:11:40,560 INFO L226 Difference]: Without dead ends: 4016 [2021-10-16 03:11:40,560 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.6ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-16 03:11:40,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4016 states. [2021-10-16 03:11:40,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4016 to 3996. [2021-10-16 03:11:40,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3996 states, 3995 states have (on average 2.9226533166458073) internal successors, (11676), 3995 states have internal predecessors, (11676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:40,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3996 states to 3996 states and 11676 transitions. [2021-10-16 03:11:40,638 INFO L78 Accepts]: Start accepts. Automaton has 3996 states and 11676 transitions. Word has length 38 [2021-10-16 03:11:40,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:40,638 INFO L470 AbstractCegarLoop]: Abstraction has 3996 states and 11676 transitions. [2021-10-16 03:11:40,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:40,639 INFO L276 IsEmpty]: Start isEmpty. Operand 3996 states and 11676 transitions. [2021-10-16 03:11:40,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:40,645 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:40,645 INFO L512 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] [2021-10-16 03:11:40,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2021-10-16 03:11:40,646 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:40,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:40,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1232562047, now seen corresponding path program 114 times [2021-10-16 03:11:40,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:40,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028925515] [2021-10-16 03:11:40,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:40,646 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:40,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:40,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:40,863 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:40,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028925515] [2021-10-16 03:11:40,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028925515] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:40,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:40,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-16 03:11:40,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361387554] [2021-10-16 03:11:40,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 03:11:40,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:40,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 03:11:40,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-16 03:11:40,865 INFO L87 Difference]: Start difference. First operand 3996 states and 11676 transitions. Second operand has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:41,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:41,110 INFO L93 Difference]: Finished difference Result 4479 states and 12852 transitions. [2021-10-16 03:11:41,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 03:11:41,110 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:41,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:41,118 INFO L225 Difference]: With dead ends: 4479 [2021-10-16 03:11:41,119 INFO L226 Difference]: Without dead ends: 3968 [2021-10-16 03:11:41,119 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 117.5ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:11:41,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3968 states. [2021-10-16 03:11:41,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3968 to 3960. [2021-10-16 03:11:41,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3960 states, 3959 states have (on average 2.8860823440262693) internal successors, (11426), 3959 states have internal predecessors, (11426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:41,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3960 states to 3960 states and 11426 transitions. [2021-10-16 03:11:41,195 INFO L78 Accepts]: Start accepts. Automaton has 3960 states and 11426 transitions. Word has length 38 [2021-10-16 03:11:41,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:41,195 INFO L470 AbstractCegarLoop]: Abstraction has 3960 states and 11426 transitions. [2021-10-16 03:11:41,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:41,195 INFO L276 IsEmpty]: Start isEmpty. Operand 3960 states and 11426 transitions. [2021-10-16 03:11:41,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:41,202 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:41,202 INFO L512 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] [2021-10-16 03:11:41,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2021-10-16 03:11:41,202 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:41,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:41,203 INFO L82 PathProgramCache]: Analyzing trace with hash 861750979, now seen corresponding path program 115 times [2021-10-16 03:11:41,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:41,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310554962] [2021-10-16 03:11:41,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:41,203 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:41,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:41,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:41,307 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:41,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310554962] [2021-10-16 03:11:41,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310554962] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:41,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:41,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:11:41,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590508194] [2021-10-16 03:11:41,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:11:41,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:41,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:11:41,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:11:41,309 INFO L87 Difference]: Start difference. First operand 3960 states and 11426 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:41,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:41,851 INFO L93 Difference]: Finished difference Result 5240 states and 14504 transitions. [2021-10-16 03:11:41,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-16 03:11:41,852 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:41,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:41,862 INFO L225 Difference]: With dead ends: 5240 [2021-10-16 03:11:41,862 INFO L226 Difference]: Without dead ends: 5224 [2021-10-16 03:11:41,862 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 172.9ms TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-10-16 03:11:41,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5224 states. [2021-10-16 03:11:41,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5224 to 4004. [2021-10-16 03:11:41,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4004 states, 4003 states have (on average 2.886585061204097) internal successors, (11555), 4003 states have internal predecessors, (11555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:41,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4004 states to 4004 states and 11555 transitions. [2021-10-16 03:11:41,951 INFO L78 Accepts]: Start accepts. Automaton has 4004 states and 11555 transitions. Word has length 38 [2021-10-16 03:11:41,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:41,951 INFO L470 AbstractCegarLoop]: Abstraction has 4004 states and 11555 transitions. [2021-10-16 03:11:41,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:41,951 INFO L276 IsEmpty]: Start isEmpty. Operand 4004 states and 11555 transitions. [2021-10-16 03:11:41,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:41,957 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:41,957 INFO L512 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] [2021-10-16 03:11:41,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2021-10-16 03:11:41,957 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:41,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:41,958 INFO L82 PathProgramCache]: Analyzing trace with hash 615714323, now seen corresponding path program 116 times [2021-10-16 03:11:41,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:41,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292942806] [2021-10-16 03:11:41,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:41,958 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:41,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:42,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:42,067 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:42,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292942806] [2021-10-16 03:11:42,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292942806] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:42,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:42,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-16 03:11:42,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842762484] [2021-10-16 03:11:42,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-16 03:11:42,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:42,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-16 03:11:42,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-10-16 03:11:42,069 INFO L87 Difference]: Start difference. First operand 4004 states and 11555 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:42,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:42,630 INFO L93 Difference]: Finished difference Result 5582 states and 15422 transitions. [2021-10-16 03:11:42,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-16 03:11:42,631 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:42,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:42,641 INFO L225 Difference]: With dead ends: 5582 [2021-10-16 03:11:42,642 INFO L226 Difference]: Without dead ends: 5512 [2021-10-16 03:11:42,642 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 176.6ms TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-10-16 03:11:42,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5512 states. [2021-10-16 03:11:42,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5512 to 4102. [2021-10-16 03:11:42,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4102 states, 4101 states have (on average 2.8810046330163375) internal successors, (11815), 4101 states have internal predecessors, (11815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:42,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4102 states to 4102 states and 11815 transitions. [2021-10-16 03:11:42,732 INFO L78 Accepts]: Start accepts. Automaton has 4102 states and 11815 transitions. Word has length 38 [2021-10-16 03:11:42,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:42,732 INFO L470 AbstractCegarLoop]: Abstraction has 4102 states and 11815 transitions. [2021-10-16 03:11:42,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:42,732 INFO L276 IsEmpty]: Start isEmpty. Operand 4102 states and 11815 transitions. [2021-10-16 03:11:42,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:42,738 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:42,738 INFO L512 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] [2021-10-16 03:11:42,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2021-10-16 03:11:42,739 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:42,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:42,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1777559399, now seen corresponding path program 117 times [2021-10-16 03:11:42,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:42,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525316696] [2021-10-16 03:11:42,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:42,739 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:42,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:42,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:42,839 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:42,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525316696] [2021-10-16 03:11:42,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525316696] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:42,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:42,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:11:42,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059462652] [2021-10-16 03:11:42,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:11:42,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:42,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:11:42,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:11:42,840 INFO L87 Difference]: Start difference. First operand 4102 states and 11815 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:43,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:43,218 INFO L93 Difference]: Finished difference Result 4618 states and 13001 transitions. [2021-10-16 03:11:43,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-16 03:11:43,218 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:43,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:43,227 INFO L225 Difference]: With dead ends: 4618 [2021-10-16 03:11:43,227 INFO L226 Difference]: Without dead ends: 4588 [2021-10-16 03:11:43,227 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 112.5ms TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-10-16 03:11:43,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4588 states. [2021-10-16 03:11:43,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4588 to 4100. [2021-10-16 03:11:43,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4100 states, 4099 states have (on average 2.878750914857282) internal successors, (11800), 4099 states have internal predecessors, (11800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:43,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4100 states to 4100 states and 11800 transitions. [2021-10-16 03:11:43,309 INFO L78 Accepts]: Start accepts. Automaton has 4100 states and 11800 transitions. Word has length 38 [2021-10-16 03:11:43,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:43,309 INFO L470 AbstractCegarLoop]: Abstraction has 4100 states and 11800 transitions. [2021-10-16 03:11:43,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:43,310 INFO L276 IsEmpty]: Start isEmpty. Operand 4100 states and 11800 transitions. [2021-10-16 03:11:43,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:43,316 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:43,316 INFO L512 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] [2021-10-16 03:11:43,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2021-10-16 03:11:43,316 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:43,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:43,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1554609641, now seen corresponding path program 118 times [2021-10-16 03:11:43,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:43,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565284768] [2021-10-16 03:11:43,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:43,318 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:43,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:43,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:43,434 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:43,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565284768] [2021-10-16 03:11:43,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565284768] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:43,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:43,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:11:43,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183948631] [2021-10-16 03:11:43,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:11:43,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:43,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:11:43,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:11:43,435 INFO L87 Difference]: Start difference. First operand 4100 states and 11800 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:43,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:43,842 INFO L93 Difference]: Finished difference Result 4956 states and 13914 transitions. [2021-10-16 03:11:43,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-16 03:11:43,842 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:43,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:43,852 INFO L225 Difference]: With dead ends: 4956 [2021-10-16 03:11:43,852 INFO L226 Difference]: Without dead ends: 4858 [2021-10-16 03:11:43,852 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 137.8ms TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-10-16 03:11:43,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4858 states. [2021-10-16 03:11:43,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4858 to 4082. [2021-10-16 03:11:43,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4082 states, 4081 states have (on average 2.8791962754226903) internal successors, (11750), 4081 states have internal predecessors, (11750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:43,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4082 states to 4082 states and 11750 transitions. [2021-10-16 03:11:43,966 INFO L78 Accepts]: Start accepts. Automaton has 4082 states and 11750 transitions. Word has length 38 [2021-10-16 03:11:43,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:43,966 INFO L470 AbstractCegarLoop]: Abstraction has 4082 states and 11750 transitions. [2021-10-16 03:11:43,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:43,966 INFO L276 IsEmpty]: Start isEmpty. Operand 4082 states and 11750 transitions. [2021-10-16 03:11:43,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:43,972 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:43,972 INFO L512 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] [2021-10-16 03:11:43,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2021-10-16 03:11:43,973 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:43,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:43,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1360091997, now seen corresponding path program 119 times [2021-10-16 03:11:43,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:43,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239217941] [2021-10-16 03:11:43,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:43,974 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:43,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:44,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:44,080 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:44,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239217941] [2021-10-16 03:11:44,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239217941] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:44,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:44,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:11:44,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729160050] [2021-10-16 03:11:44,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:11:44,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:44,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:11:44,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:11:44,082 INFO L87 Difference]: Start difference. First operand 4082 states and 11750 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:44,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:44,635 INFO L93 Difference]: Finished difference Result 5300 states and 14677 transitions. [2021-10-16 03:11:44,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-16 03:11:44,636 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:44,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:44,650 INFO L225 Difference]: With dead ends: 5300 [2021-10-16 03:11:44,650 INFO L226 Difference]: Without dead ends: 5292 [2021-10-16 03:11:44,651 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 158.0ms TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-10-16 03:11:44,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5292 states. [2021-10-16 03:11:44,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5292 to 4086. [2021-10-16 03:11:44,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4086 states, 4085 states have (on average 2.878824969400245) internal successors, (11760), 4085 states have internal predecessors, (11760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:44,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4086 states to 4086 states and 11760 transitions. [2021-10-16 03:11:44,777 INFO L78 Accepts]: Start accepts. Automaton has 4086 states and 11760 transitions. Word has length 38 [2021-10-16 03:11:44,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:44,777 INFO L470 AbstractCegarLoop]: Abstraction has 4086 states and 11760 transitions. [2021-10-16 03:11:44,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:44,778 INFO L276 IsEmpty]: Start isEmpty. Operand 4086 states and 11760 transitions. [2021-10-16 03:11:44,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:44,787 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:44,787 INFO L512 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] [2021-10-16 03:11:44,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2021-10-16 03:11:44,787 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:44,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:44,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1341418813, now seen corresponding path program 120 times [2021-10-16 03:11:44,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:44,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679007893] [2021-10-16 03:11:44,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:44,789 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:44,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:44,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:44,906 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:44,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679007893] [2021-10-16 03:11:44,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679007893] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:44,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:44,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:11:44,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573639006] [2021-10-16 03:11:44,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:11:44,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:44,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:11:44,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:11:44,912 INFO L87 Difference]: Start difference. First operand 4086 states and 11760 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:45,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:45,307 INFO L93 Difference]: Finished difference Result 4408 states and 12546 transitions. [2021-10-16 03:11:45,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-16 03:11:45,307 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:45,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:45,316 INFO L225 Difference]: With dead ends: 4408 [2021-10-16 03:11:45,316 INFO L226 Difference]: Without dead ends: 4392 [2021-10-16 03:11:45,317 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 155.1ms TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-10-16 03:11:45,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4392 states. [2021-10-16 03:11:45,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4392 to 4104. [2021-10-16 03:11:45,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4104 states, 4103 states have (on average 2.8781379478430416) internal successors, (11809), 4103 states have internal predecessors, (11809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:45,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4104 states to 4104 states and 11809 transitions. [2021-10-16 03:11:45,399 INFO L78 Accepts]: Start accepts. Automaton has 4104 states and 11809 transitions. Word has length 38 [2021-10-16 03:11:45,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:45,399 INFO L470 AbstractCegarLoop]: Abstraction has 4104 states and 11809 transitions. [2021-10-16 03:11:45,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:45,399 INFO L276 IsEmpty]: Start isEmpty. Operand 4104 states and 11809 transitions. [2021-10-16 03:11:45,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:45,405 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:45,405 INFO L512 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] [2021-10-16 03:11:45,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2021-10-16 03:11:45,405 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:45,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:45,406 INFO L82 PathProgramCache]: Analyzing trace with hash 590782761, now seen corresponding path program 121 times [2021-10-16 03:11:45,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:45,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081880088] [2021-10-16 03:11:45,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:45,406 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:45,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:45,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:45,520 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:45,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081880088] [2021-10-16 03:11:45,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081880088] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:45,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:45,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:11:45,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296923143] [2021-10-16 03:11:45,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:11:45,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:45,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:11:45,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:11:45,522 INFO L87 Difference]: Start difference. First operand 4104 states and 11809 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:45,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:45,922 INFO L93 Difference]: Finished difference Result 4358 states and 12418 transitions. [2021-10-16 03:11:45,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-16 03:11:45,923 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:45,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:45,936 INFO L225 Difference]: With dead ends: 4358 [2021-10-16 03:11:45,936 INFO L226 Difference]: Without dead ends: 4328 [2021-10-16 03:11:45,936 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 175.8ms TimeCoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2021-10-16 03:11:45,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4328 states. [2021-10-16 03:11:46,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4328 to 4086. [2021-10-16 03:11:46,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4086 states, 4085 states have (on average 2.8783353733170136) internal successors, (11758), 4085 states have internal predecessors, (11758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:46,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4086 states to 4086 states and 11758 transitions. [2021-10-16 03:11:46,052 INFO L78 Accepts]: Start accepts. Automaton has 4086 states and 11758 transitions. Word has length 38 [2021-10-16 03:11:46,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:46,052 INFO L470 AbstractCegarLoop]: Abstraction has 4086 states and 11758 transitions. [2021-10-16 03:11:46,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:46,053 INFO L276 IsEmpty]: Start isEmpty. Operand 4086 states and 11758 transitions. [2021-10-16 03:11:46,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:46,062 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:46,062 INFO L512 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] [2021-10-16 03:11:46,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2021-10-16 03:11:46,062 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:46,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:46,063 INFO L82 PathProgramCache]: Analyzing trace with hash -343185135, now seen corresponding path program 122 times [2021-10-16 03:11:46,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:46,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227857955] [2021-10-16 03:11:46,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:46,064 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:46,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:46,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:46,224 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:46,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227857955] [2021-10-16 03:11:46,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227857955] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:46,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:46,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:11:46,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873621489] [2021-10-16 03:11:46,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:11:46,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:46,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:11:46,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:11:46,226 INFO L87 Difference]: Start difference. First operand 4086 states and 11758 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:46,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:46,634 INFO L93 Difference]: Finished difference Result 4360 states and 12413 transitions. [2021-10-16 03:11:46,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-16 03:11:46,635 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:46,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:46,643 INFO L225 Difference]: With dead ends: 4360 [2021-10-16 03:11:46,643 INFO L226 Difference]: Without dead ends: 4336 [2021-10-16 03:11:46,643 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 187.6ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-10-16 03:11:46,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4336 states. [2021-10-16 03:11:46,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4336 to 4086. [2021-10-16 03:11:46,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4086 states, 4085 states have (on average 2.877845777233782) internal successors, (11756), 4085 states have internal predecessors, (11756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:46,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4086 states to 4086 states and 11756 transitions. [2021-10-16 03:11:46,718 INFO L78 Accepts]: Start accepts. Automaton has 4086 states and 11756 transitions. Word has length 38 [2021-10-16 03:11:46,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:46,718 INFO L470 AbstractCegarLoop]: Abstraction has 4086 states and 11756 transitions. [2021-10-16 03:11:46,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:46,719 INFO L276 IsEmpty]: Start isEmpty. Operand 4086 states and 11756 transitions. [2021-10-16 03:11:46,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:46,725 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:46,726 INFO L512 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] [2021-10-16 03:11:46,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2021-10-16 03:11:46,727 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:46,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:46,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1649210443, now seen corresponding path program 123 times [2021-10-16 03:11:46,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:46,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761599074] [2021-10-16 03:11:46,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:46,727 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:46,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:46,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:46,865 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:46,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761599074] [2021-10-16 03:11:46,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761599074] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:46,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:46,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-16 03:11:46,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498804526] [2021-10-16 03:11:46,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-16 03:11:46,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:46,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-16 03:11:46,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-10-16 03:11:46,867 INFO L87 Difference]: Start difference. First operand 4086 states and 11756 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:47,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:47,421 INFO L93 Difference]: Finished difference Result 4548 states and 12795 transitions. [2021-10-16 03:11:47,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-16 03:11:47,422 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:47,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:47,434 INFO L225 Difference]: With dead ends: 4548 [2021-10-16 03:11:47,434 INFO L226 Difference]: Without dead ends: 4486 [2021-10-16 03:11:47,434 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 229.4ms TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-10-16 03:11:47,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4486 states. [2021-10-16 03:11:47,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4486 to 4154. [2021-10-16 03:11:47,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4154 states, 4153 states have (on average 2.873344570190224) internal successors, (11933), 4153 states have internal predecessors, (11933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:47,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4154 states to 4154 states and 11933 transitions. [2021-10-16 03:11:47,540 INFO L78 Accepts]: Start accepts. Automaton has 4154 states and 11933 transitions. Word has length 38 [2021-10-16 03:11:47,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:47,540 INFO L470 AbstractCegarLoop]: Abstraction has 4154 states and 11933 transitions. [2021-10-16 03:11:47,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:47,541 INFO L276 IsEmpty]: Start isEmpty. Operand 4154 states and 11933 transitions. [2021-10-16 03:11:47,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:47,546 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:47,546 INFO L512 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] [2021-10-16 03:11:47,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2021-10-16 03:11:47,547 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:47,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:47,547 INFO L82 PathProgramCache]: Analyzing trace with hash -349614713, now seen corresponding path program 124 times [2021-10-16 03:11:47,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:47,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501443628] [2021-10-16 03:11:47,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:47,548 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:47,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:47,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:47,652 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:47,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501443628] [2021-10-16 03:11:47,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501443628] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:47,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:47,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:11:47,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039384106] [2021-10-16 03:11:47,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:11:47,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:47,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:11:47,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:11:47,653 INFO L87 Difference]: Start difference. First operand 4154 states and 11933 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:48,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:48,110 INFO L93 Difference]: Finished difference Result 5260 states and 14534 transitions. [2021-10-16 03:11:48,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-16 03:11:48,111 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:48,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:48,121 INFO L225 Difference]: With dead ends: 5260 [2021-10-16 03:11:48,121 INFO L226 Difference]: Without dead ends: 5196 [2021-10-16 03:11:48,121 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 143.1ms TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-10-16 03:11:48,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5196 states. [2021-10-16 03:11:48,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5196 to 4154. [2021-10-16 03:11:48,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4154 states, 4153 states have (on average 2.873344570190224) internal successors, (11933), 4153 states have internal predecessors, (11933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:48,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4154 states to 4154 states and 11933 transitions. [2021-10-16 03:11:48,204 INFO L78 Accepts]: Start accepts. Automaton has 4154 states and 11933 transitions. Word has length 38 [2021-10-16 03:11:48,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:48,204 INFO L470 AbstractCegarLoop]: Abstraction has 4154 states and 11933 transitions. [2021-10-16 03:11:48,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:48,204 INFO L276 IsEmpty]: Start isEmpty. Operand 4154 states and 11933 transitions. [2021-10-16 03:11:48,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:48,210 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:48,210 INFO L512 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] [2021-10-16 03:11:48,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2021-10-16 03:11:48,210 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:48,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:48,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1919714835, now seen corresponding path program 125 times [2021-10-16 03:11:48,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:48,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076930749] [2021-10-16 03:11:48,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:48,211 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:48,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:48,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:48,318 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:48,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076930749] [2021-10-16 03:11:48,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076930749] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:48,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:48,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:11:48,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510180268] [2021-10-16 03:11:48,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:11:48,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:48,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:11:48,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:11:48,319 INFO L87 Difference]: Start difference. First operand 4154 states and 11933 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:48,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:48,731 INFO L93 Difference]: Finished difference Result 4514 states and 12701 transitions. [2021-10-16 03:11:48,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-16 03:11:48,731 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:48,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:48,740 INFO L225 Difference]: With dead ends: 4514 [2021-10-16 03:11:48,740 INFO L226 Difference]: Without dead ends: 4424 [2021-10-16 03:11:48,740 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 149.7ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-10-16 03:11:48,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4424 states. [2021-10-16 03:11:48,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4424 to 4094. [2021-10-16 03:11:48,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4094 states, 4093 states have (on average 2.8756413388712434) internal successors, (11770), 4093 states have internal predecessors, (11770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:48,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4094 states to 4094 states and 11770 transitions. [2021-10-16 03:11:48,857 INFO L78 Accepts]: Start accepts. Automaton has 4094 states and 11770 transitions. Word has length 38 [2021-10-16 03:11:48,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:48,857 INFO L470 AbstractCegarLoop]: Abstraction has 4094 states and 11770 transitions. [2021-10-16 03:11:48,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:48,857 INFO L276 IsEmpty]: Start isEmpty. Operand 4094 states and 11770 transitions. [2021-10-16 03:11:48,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:48,863 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:48,863 INFO L512 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] [2021-10-16 03:11:48,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2021-10-16 03:11:48,865 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:48,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:48,865 INFO L82 PathProgramCache]: Analyzing trace with hash 588056673, now seen corresponding path program 126 times [2021-10-16 03:11:48,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:48,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563828733] [2021-10-16 03:11:48,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:48,866 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:48,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:48,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:48,993 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:48,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563828733] [2021-10-16 03:11:48,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563828733] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:48,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:48,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-16 03:11:48,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979178471] [2021-10-16 03:11:48,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-16 03:11:48,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:48,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-16 03:11:48,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-10-16 03:11:48,995 INFO L87 Difference]: Start difference. First operand 4094 states and 11770 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:49,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:49,428 INFO L93 Difference]: Finished difference Result 4482 states and 12612 transitions. [2021-10-16 03:11:49,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-16 03:11:49,429 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:49,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:49,436 INFO L225 Difference]: With dead ends: 4482 [2021-10-16 03:11:49,436 INFO L226 Difference]: Without dead ends: 4410 [2021-10-16 03:11:49,436 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 172.5ms TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2021-10-16 03:11:49,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4410 states. [2021-10-16 03:11:49,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4410 to 4088. [2021-10-16 03:11:49,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4088 states, 4087 states have (on average 2.876682162955713) internal successors, (11757), 4087 states have internal predecessors, (11757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:49,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4088 states to 4088 states and 11757 transitions. [2021-10-16 03:11:49,505 INFO L78 Accepts]: Start accepts. Automaton has 4088 states and 11757 transitions. Word has length 38 [2021-10-16 03:11:49,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:49,506 INFO L470 AbstractCegarLoop]: Abstraction has 4088 states and 11757 transitions. [2021-10-16 03:11:49,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:49,506 INFO L276 IsEmpty]: Start isEmpty. Operand 4088 states and 11757 transitions. [2021-10-16 03:11:49,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:49,511 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:49,512 INFO L512 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] [2021-10-16 03:11:49,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2021-10-16 03:11:49,512 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:49,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:49,513 INFO L82 PathProgramCache]: Analyzing trace with hash 879986273, now seen corresponding path program 127 times [2021-10-16 03:11:49,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:49,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103174381] [2021-10-16 03:11:49,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:49,514 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:49,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:49,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:49,653 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:49,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103174381] [2021-10-16 03:11:49,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103174381] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:49,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:49,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:11:49,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058006371] [2021-10-16 03:11:49,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:11:49,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:49,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:11:49,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:11:49,655 INFO L87 Difference]: Start difference. First operand 4088 states and 11757 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:50,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:50,080 INFO L93 Difference]: Finished difference Result 4992 states and 13908 transitions. [2021-10-16 03:11:50,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-16 03:11:50,081 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:50,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:50,091 INFO L225 Difference]: With dead ends: 4992 [2021-10-16 03:11:50,091 INFO L226 Difference]: Without dead ends: 4984 [2021-10-16 03:11:50,091 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 165.8ms TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-10-16 03:11:50,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4984 states. [2021-10-16 03:11:50,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4984 to 4092. [2021-10-16 03:11:50,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4092 states, 4091 states have (on average 2.876313859692007) internal successors, (11767), 4091 states have internal predecessors, (11767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:50,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4092 states to 4092 states and 11767 transitions. [2021-10-16 03:11:50,173 INFO L78 Accepts]: Start accepts. Automaton has 4092 states and 11767 transitions. Word has length 38 [2021-10-16 03:11:50,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:50,174 INFO L470 AbstractCegarLoop]: Abstraction has 4092 states and 11767 transitions. [2021-10-16 03:11:50,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:50,174 INFO L276 IsEmpty]: Start isEmpty. Operand 4092 states and 11767 transitions. [2021-10-16 03:11:50,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:50,181 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:50,181 INFO L512 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] [2021-10-16 03:11:50,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2021-10-16 03:11:50,181 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:50,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:50,182 INFO L82 PathProgramCache]: Analyzing trace with hash 898659457, now seen corresponding path program 128 times [2021-10-16 03:11:50,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:50,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4407491] [2021-10-16 03:11:50,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:50,182 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:50,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:50,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:50,289 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:50,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4407491] [2021-10-16 03:11:50,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4407491] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:50,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:50,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:11:50,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400711878] [2021-10-16 03:11:50,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:11:50,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:50,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:11:50,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:11:50,292 INFO L87 Difference]: Start difference. First operand 4092 states and 11767 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:50,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:50,779 INFO L93 Difference]: Finished difference Result 4460 states and 12652 transitions. [2021-10-16 03:11:50,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-16 03:11:50,779 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:50,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:50,792 INFO L225 Difference]: With dead ends: 4460 [2021-10-16 03:11:50,792 INFO L226 Difference]: Without dead ends: 4444 [2021-10-16 03:11:50,793 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 184.7ms TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-10-16 03:11:50,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4444 states. [2021-10-16 03:11:50,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4444 to 4110. [2021-10-16 03:11:50,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4110 states, 4109 states have (on average 2.8756388415672913) internal successors, (11816), 4109 states have internal predecessors, (11816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:50,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4110 states to 4110 states and 11816 transitions. [2021-10-16 03:11:50,905 INFO L78 Accepts]: Start accepts. Automaton has 4110 states and 11816 transitions. Word has length 38 [2021-10-16 03:11:50,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:50,905 INFO L470 AbstractCegarLoop]: Abstraction has 4110 states and 11816 transitions. [2021-10-16 03:11:50,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:50,906 INFO L276 IsEmpty]: Start isEmpty. Operand 4110 states and 11816 transitions. [2021-10-16 03:11:50,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:50,914 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:50,914 INFO L512 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] [2021-10-16 03:11:50,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2021-10-16 03:11:50,915 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:50,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:50,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1464106265, now seen corresponding path program 129 times [2021-10-16 03:11:50,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:50,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212244944] [2021-10-16 03:11:50,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:50,916 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:50,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:51,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:51,033 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:51,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212244944] [2021-10-16 03:11:51,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212244944] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:51,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:51,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:11:51,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158790] [2021-10-16 03:11:51,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:11:51,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:51,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:11:51,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:11:51,035 INFO L87 Difference]: Start difference. First operand 4110 states and 11816 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:51,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:51,452 INFO L93 Difference]: Finished difference Result 4410 states and 12524 transitions. [2021-10-16 03:11:51,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-16 03:11:51,453 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:51,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:51,465 INFO L225 Difference]: With dead ends: 4410 [2021-10-16 03:11:51,465 INFO L226 Difference]: Without dead ends: 4380 [2021-10-16 03:11:51,466 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 181.7ms TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2021-10-16 03:11:51,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4380 states. [2021-10-16 03:11:51,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4380 to 4092. [2021-10-16 03:11:51,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4092 states, 4091 states have (on average 2.875824981667074) internal successors, (11765), 4091 states have internal predecessors, (11765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:51,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4092 states to 4092 states and 11765 transitions. [2021-10-16 03:11:51,576 INFO L78 Accepts]: Start accepts. Automaton has 4092 states and 11765 transitions. Word has length 38 [2021-10-16 03:11:51,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:51,577 INFO L470 AbstractCegarLoop]: Abstraction has 4092 states and 11765 transitions. [2021-10-16 03:11:51,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:51,577 INFO L276 IsEmpty]: Start isEmpty. Operand 4092 states and 11765 transitions. [2021-10-16 03:11:51,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:51,586 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:51,586 INFO L512 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] [2021-10-16 03:11:51,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2021-10-16 03:11:51,586 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:51,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:51,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1896893135, now seen corresponding path program 130 times [2021-10-16 03:11:51,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:51,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105844790] [2021-10-16 03:11:51,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:51,588 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:51,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:51,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:51,762 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:51,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105844790] [2021-10-16 03:11:51,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105844790] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:51,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:51,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:11:51,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278693043] [2021-10-16 03:11:51,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:11:51,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:51,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:11:51,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:11:51,764 INFO L87 Difference]: Start difference. First operand 4092 states and 11765 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:52,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:52,343 INFO L93 Difference]: Finished difference Result 4420 states and 12535 transitions. [2021-10-16 03:11:52,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-16 03:11:52,343 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:52,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:52,355 INFO L225 Difference]: With dead ends: 4420 [2021-10-16 03:11:52,355 INFO L226 Difference]: Without dead ends: 4396 [2021-10-16 03:11:52,356 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 263.1ms TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-10-16 03:11:52,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4396 states. [2021-10-16 03:11:52,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4396 to 4088. [2021-10-16 03:11:52,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4088 states, 4087 states have (on average 2.876192806459506) internal successors, (11755), 4087 states have internal predecessors, (11755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:52,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4088 states to 4088 states and 11755 transitions. [2021-10-16 03:11:52,470 INFO L78 Accepts]: Start accepts. Automaton has 4088 states and 11755 transitions. Word has length 38 [2021-10-16 03:11:52,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:52,470 INFO L470 AbstractCegarLoop]: Abstraction has 4088 states and 11755 transitions. [2021-10-16 03:11:52,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:52,471 INFO L276 IsEmpty]: Start isEmpty. Operand 4088 states and 11755 transitions. [2021-10-16 03:11:52,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:52,480 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:52,480 INFO L512 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] [2021-10-16 03:11:52,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2021-10-16 03:11:52,480 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:52,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:52,481 INFO L82 PathProgramCache]: Analyzing trace with hash 691089211, now seen corresponding path program 131 times [2021-10-16 03:11:52,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:52,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672400701] [2021-10-16 03:11:52,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:52,482 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:52,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:52,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:52,646 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:52,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672400701] [2021-10-16 03:11:52,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672400701] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:52,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:52,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:11:52,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814169381] [2021-10-16 03:11:52,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:11:52,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:52,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:11:52,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:11:52,649 INFO L87 Difference]: Start difference. First operand 4088 states and 11755 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:52,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:52,931 INFO L93 Difference]: Finished difference Result 4144 states and 11853 transitions. [2021-10-16 03:11:52,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-16 03:11:52,932 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:52,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:52,940 INFO L225 Difference]: With dead ends: 4144 [2021-10-16 03:11:52,940 INFO L226 Difference]: Without dead ends: 4110 [2021-10-16 03:11:52,941 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 160.9ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-10-16 03:11:52,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4110 states. [2021-10-16 03:11:53,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4110 to 4088. [2021-10-16 03:11:53,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4088 states, 4087 states have (on average 2.8737460239784682) internal successors, (11745), 4087 states have internal predecessors, (11745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:53,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4088 states to 4088 states and 11745 transitions. [2021-10-16 03:11:53,018 INFO L78 Accepts]: Start accepts. Automaton has 4088 states and 11745 transitions. Word has length 38 [2021-10-16 03:11:53,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:53,018 INFO L470 AbstractCegarLoop]: Abstraction has 4088 states and 11745 transitions. [2021-10-16 03:11:53,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:53,018 INFO L276 IsEmpty]: Start isEmpty. Operand 4088 states and 11745 transitions. [2021-10-16 03:11:53,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:53,025 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:53,025 INFO L512 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] [2021-10-16 03:11:53,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2021-10-16 03:11:53,025 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:53,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:53,026 INFO L82 PathProgramCache]: Analyzing trace with hash -605407197, now seen corresponding path program 132 times [2021-10-16 03:11:53,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:53,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914795418] [2021-10-16 03:11:53,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:53,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:53,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:53,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:53,158 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:53,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914795418] [2021-10-16 03:11:53,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914795418] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:53,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:53,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:11:53,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775918177] [2021-10-16 03:11:53,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:11:53,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:53,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:11:53,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:11:53,159 INFO L87 Difference]: Start difference. First operand 4088 states and 11745 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:53,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:53,634 INFO L93 Difference]: Finished difference Result 4542 states and 12768 transitions. [2021-10-16 03:11:53,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-16 03:11:53,635 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:53,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:53,644 INFO L225 Difference]: With dead ends: 4542 [2021-10-16 03:11:53,644 INFO L226 Difference]: Without dead ends: 4480 [2021-10-16 03:11:53,644 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 184.8ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-10-16 03:11:53,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4480 states. [2021-10-16 03:11:53,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4480 to 4156. [2021-10-16 03:11:53,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4156 states, 4155 states have (on average 2.8693140794223826) internal successors, (11922), 4155 states have internal predecessors, (11922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:53,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4156 states to 4156 states and 11922 transitions. [2021-10-16 03:11:53,727 INFO L78 Accepts]: Start accepts. Automaton has 4156 states and 11922 transitions. Word has length 38 [2021-10-16 03:11:53,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:53,727 INFO L470 AbstractCegarLoop]: Abstraction has 4156 states and 11922 transitions. [2021-10-16 03:11:53,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:53,727 INFO L276 IsEmpty]: Start isEmpty. Operand 4156 states and 11922 transitions. [2021-10-16 03:11:53,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:53,733 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:53,733 INFO L512 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] [2021-10-16 03:11:53,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2021-10-16 03:11:53,733 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:53,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:53,734 INFO L82 PathProgramCache]: Analyzing trace with hash 694188533, now seen corresponding path program 133 times [2021-10-16 03:11:53,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:53,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556176394] [2021-10-16 03:11:53,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:53,734 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:53,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:53,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:53,877 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:53,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556176394] [2021-10-16 03:11:53,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556176394] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:53,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:53,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:11:53,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071161645] [2021-10-16 03:11:53,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:11:53,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:53,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:11:53,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:11:53,878 INFO L87 Difference]: Start difference. First operand 4156 states and 11922 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:54,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:54,415 INFO L93 Difference]: Finished difference Result 5064 states and 13989 transitions. [2021-10-16 03:11:54,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-16 03:11:54,415 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:54,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:54,425 INFO L225 Difference]: With dead ends: 5064 [2021-10-16 03:11:54,425 INFO L226 Difference]: Without dead ends: 5000 [2021-10-16 03:11:54,425 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 161.9ms TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2021-10-16 03:11:54,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5000 states. [2021-10-16 03:11:54,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5000 to 4156. [2021-10-16 03:11:54,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4156 states, 4155 states have (on average 2.8693140794223826) internal successors, (11922), 4155 states have internal predecessors, (11922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:54,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4156 states to 4156 states and 11922 transitions. [2021-10-16 03:11:54,511 INFO L78 Accepts]: Start accepts. Automaton has 4156 states and 11922 transitions. Word has length 38 [2021-10-16 03:11:54,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:54,512 INFO L470 AbstractCegarLoop]: Abstraction has 4156 states and 11922 transitions. [2021-10-16 03:11:54,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:54,512 INFO L276 IsEmpty]: Start isEmpty. Operand 4156 states and 11922 transitions. [2021-10-16 03:11:54,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:54,518 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:54,519 INFO L512 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] [2021-10-16 03:11:54,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2021-10-16 03:11:54,519 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:54,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:54,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1331449215, now seen corresponding path program 134 times [2021-10-16 03:11:54,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:54,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240741508] [2021-10-16 03:11:54,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:54,520 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:54,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:54,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:54,640 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:54,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240741508] [2021-10-16 03:11:54,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240741508] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:54,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:54,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:11:54,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044109603] [2021-10-16 03:11:54,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:11:54,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:54,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:11:54,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:11:54,642 INFO L87 Difference]: Start difference. First operand 4156 states and 11922 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:55,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:55,169 INFO L93 Difference]: Finished difference Result 4566 states and 12801 transitions. [2021-10-16 03:11:55,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-16 03:11:55,170 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:55,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:55,178 INFO L225 Difference]: With dead ends: 4566 [2021-10-16 03:11:55,178 INFO L226 Difference]: Without dead ends: 4476 [2021-10-16 03:11:55,179 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 185.3ms TimeCoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2021-10-16 03:11:55,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4476 states. [2021-10-16 03:11:55,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4476 to 4096. [2021-10-16 03:11:55,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4096 states, 4095 states have (on average 2.8715506715506716) internal successors, (11759), 4095 states have internal predecessors, (11759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:55,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4096 states to 4096 states and 11759 transitions. [2021-10-16 03:11:55,261 INFO L78 Accepts]: Start accepts. Automaton has 4096 states and 11759 transitions. Word has length 38 [2021-10-16 03:11:55,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:55,261 INFO L470 AbstractCegarLoop]: Abstraction has 4096 states and 11759 transitions. [2021-10-16 03:11:55,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:55,262 INFO L276 IsEmpty]: Start isEmpty. Operand 4096 states and 11759 transitions. [2021-10-16 03:11:55,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:55,267 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:55,268 INFO L512 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] [2021-10-16 03:11:55,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2021-10-16 03:11:55,268 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:55,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:55,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1631859919, now seen corresponding path program 135 times [2021-10-16 03:11:55,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:55,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129642412] [2021-10-16 03:11:55,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:55,269 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:55,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:55,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:55,411 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:55,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129642412] [2021-10-16 03:11:55,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129642412] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:55,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:55,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-16 03:11:55,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264997196] [2021-10-16 03:11:55,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-16 03:11:55,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:55,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-16 03:11:55,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-10-16 03:11:55,413 INFO L87 Difference]: Start difference. First operand 4096 states and 11759 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:55,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:55,980 INFO L93 Difference]: Finished difference Result 4534 states and 12712 transitions. [2021-10-16 03:11:55,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-16 03:11:55,981 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:55,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:55,989 INFO L225 Difference]: With dead ends: 4534 [2021-10-16 03:11:55,989 INFO L226 Difference]: Without dead ends: 4466 [2021-10-16 03:11:55,990 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 239.8ms TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-10-16 03:11:55,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4466 states. [2021-10-16 03:11:56,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4466 to 4088. [2021-10-16 03:11:56,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4088 states, 4087 states have (on average 2.8727673109860534) internal successors, (11741), 4087 states have internal predecessors, (11741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:56,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4088 states to 4088 states and 11741 transitions. [2021-10-16 03:11:56,066 INFO L78 Accepts]: Start accepts. Automaton has 4088 states and 11741 transitions. Word has length 38 [2021-10-16 03:11:56,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:56,067 INFO L470 AbstractCegarLoop]: Abstraction has 4088 states and 11741 transitions. [2021-10-16 03:11:56,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:56,067 INFO L276 IsEmpty]: Start isEmpty. Operand 4088 states and 11741 transitions. [2021-10-16 03:11:56,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:56,073 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:56,073 INFO L512 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] [2021-10-16 03:11:56,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2021-10-16 03:11:56,073 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:56,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:56,073 INFO L82 PathProgramCache]: Analyzing trace with hash -505185813, now seen corresponding path program 136 times [2021-10-16 03:11:56,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:56,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387730381] [2021-10-16 03:11:56,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:56,074 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:56,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:56,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:56,217 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:56,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387730381] [2021-10-16 03:11:56,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387730381] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:56,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:56,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-16 03:11:56,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324047420] [2021-10-16 03:11:56,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-16 03:11:56,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:56,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-16 03:11:56,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-10-16 03:11:56,219 INFO L87 Difference]: Start difference. First operand 4088 states and 11741 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:56,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:56,680 INFO L93 Difference]: Finished difference Result 4258 states and 12062 transitions. [2021-10-16 03:11:56,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-16 03:11:56,681 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:56,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:56,689 INFO L225 Difference]: With dead ends: 4258 [2021-10-16 03:11:56,689 INFO L226 Difference]: Without dead ends: 4164 [2021-10-16 03:11:56,689 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 198.5ms TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-10-16 03:11:56,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4164 states. [2021-10-16 03:11:56,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4164 to 4064. [2021-10-16 03:11:56,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4064 states, 4063 states have (on average 2.8739847403396506) internal successors, (11677), 4063 states have internal predecessors, (11677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:56,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4064 states to 4064 states and 11677 transitions. [2021-10-16 03:11:56,767 INFO L78 Accepts]: Start accepts. Automaton has 4064 states and 11677 transitions. Word has length 38 [2021-10-16 03:11:56,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:56,767 INFO L470 AbstractCegarLoop]: Abstraction has 4064 states and 11677 transitions. [2021-10-16 03:11:56,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:56,767 INFO L276 IsEmpty]: Start isEmpty. Operand 4064 states and 11677 transitions. [2021-10-16 03:11:56,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:11:56,773 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:56,773 INFO L512 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] [2021-10-16 03:11:56,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2021-10-16 03:11:56,773 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:11:56,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:56,774 INFO L82 PathProgramCache]: Analyzing trace with hash 62947225, now seen corresponding path program 137 times [2021-10-16 03:11:56,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:56,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607042270] [2021-10-16 03:11:56,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:56,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:56,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:56,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:56,921 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:56,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607042270] [2021-10-16 03:11:56,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607042270] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:56,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:56,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:11:56,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694456285] [2021-10-16 03:11:56,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:11:56,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:56,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:11:56,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:11:56,923 INFO L87 Difference]: Start difference. First operand 4064 states and 11677 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:57,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:57,408 INFO L93 Difference]: Finished difference Result 5600 states and 15444 transitions. [2021-10-16 03:11:57,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-16 03:11:57,409 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:11:57,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:57,419 INFO L225 Difference]: With dead ends: 5600 [2021-10-16 03:11:57,419 INFO L226 Difference]: Without dead ends: 5592 [2021-10-16 03:11:57,420 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 153.3ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-10-16 03:11:57,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5592 states. [2021-10-16 03:11:57,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5592 to 4080. [2021-10-16 03:11:57,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4080 states, 4079 states have (on average 2.8739887227261582) internal successors, (11723), 4079 states have internal predecessors, (11723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:57,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4080 states to 4080 states and 11723 transitions. [2021-10-16 03:11:57,508 INFO L78 Accepts]: Start accepts. Automaton has 4080 states and 11723 transitions. Word has length 38 [2021-10-16 03:11:57,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:57,508 INFO L470 AbstractCegarLoop]: Abstraction has 4080 states and 11723 transitions. [2021-10-16 03:11:57,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) WARNING: YOUR LOGFILE WAS TOO LONG, SOME LINES IN THE MIDDLE WERE REMOVED. [2021-10-16 03:12:09,259 INFO L276 IsEmpty]: Start isEmpty. Operand 2566 states and 7148 transitions. [2021-10-16 03:12:09,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:09,262 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:09,262 INFO L512 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] [2021-10-16 03:12:09,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2021-10-16 03:12:09,262 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:09,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:09,263 INFO L82 PathProgramCache]: Analyzing trace with hash 447503429, now seen corresponding path program 155 times [2021-10-16 03:12:09,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:09,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130580112] [2021-10-16 03:12:09,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:09,263 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:09,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:09,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:09,406 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:09,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130580112] [2021-10-16 03:12:09,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130580112] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:09,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:09,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:12:09,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850212362] [2021-10-16 03:12:09,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:12:09,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:09,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:12:09,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:12:09,408 INFO L87 Difference]: Start difference. First operand 2566 states and 7148 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:09,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:09,889 INFO L93 Difference]: Finished difference Result 3080 states and 8220 transitions. [2021-10-16 03:12:09,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-16 03:12:09,889 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:09,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:09,894 INFO L225 Difference]: With dead ends: 3080 [2021-10-16 03:12:09,894 INFO L226 Difference]: Without dead ends: 2966 [2021-10-16 03:12:09,894 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 205.3ms TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2021-10-16 03:12:09,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2966 states. [2021-10-16 03:12:09,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2966 to 2390. [2021-10-16 03:12:09,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2390 states, 2389 states have (on average 2.7827542904981164) internal successors, (6648), 2389 states have internal predecessors, (6648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:09,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 6648 transitions. [2021-10-16 03:12:09,935 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 6648 transitions. Word has length 38 [2021-10-16 03:12:09,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:09,935 INFO L470 AbstractCegarLoop]: Abstraction has 2390 states and 6648 transitions. [2021-10-16 03:12:09,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:09,935 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 6648 transitions. [2021-10-16 03:12:09,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:09,938 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:09,938 INFO L512 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] [2021-10-16 03:12:09,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2021-10-16 03:12:09,938 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:09,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:09,939 INFO L82 PathProgramCache]: Analyzing trace with hash -951711641, now seen corresponding path program 156 times [2021-10-16 03:12:09,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:09,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933608402] [2021-10-16 03:12:09,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:09,939 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:09,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:10,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:10,036 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:10,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933608402] [2021-10-16 03:12:10,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933608402] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:10,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:10,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:12:10,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716155357] [2021-10-16 03:12:10,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:12:10,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:10,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:12:10,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:12:10,038 INFO L87 Difference]: Start difference. First operand 2390 states and 6648 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:10,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:10,408 INFO L93 Difference]: Finished difference Result 2848 states and 7679 transitions. [2021-10-16 03:12:10,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-16 03:12:10,408 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:10,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:10,413 INFO L225 Difference]: With dead ends: 2848 [2021-10-16 03:12:10,413 INFO L226 Difference]: Without dead ends: 2840 [2021-10-16 03:12:10,413 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 145.1ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-10-16 03:12:10,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2021-10-16 03:12:10,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2390. [2021-10-16 03:12:10,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2390 states, 2389 states have (on average 2.781917120133947) internal successors, (6646), 2389 states have internal predecessors, (6646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:10,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 6646 transitions. [2021-10-16 03:12:10,456 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 6646 transitions. Word has length 38 [2021-10-16 03:12:10,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:10,456 INFO L470 AbstractCegarLoop]: Abstraction has 2390 states and 6646 transitions. [2021-10-16 03:12:10,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:10,456 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 6646 transitions. [2021-10-16 03:12:10,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:10,459 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:10,459 INFO L512 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] [2021-10-16 03:12:10,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2021-10-16 03:12:10,459 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:10,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:10,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1197748297, now seen corresponding path program 157 times [2021-10-16 03:12:10,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:10,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665610076] [2021-10-16 03:12:10,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:10,460 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:10,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:10,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:10,601 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:10,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665610076] [2021-10-16 03:12:10,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665610076] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:10,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:10,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:12:10,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846577306] [2021-10-16 03:12:10,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:12:10,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:10,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:12:10,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:12:10,603 INFO L87 Difference]: Start difference. First operand 2390 states and 6646 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:11,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:11,021 INFO L93 Difference]: Finished difference Result 2882 states and 7756 transitions. [2021-10-16 03:12:11,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-16 03:12:11,022 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:11,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:11,027 INFO L225 Difference]: With dead ends: 2882 [2021-10-16 03:12:11,027 INFO L226 Difference]: Without dead ends: 2860 [2021-10-16 03:12:11,027 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 182.5ms TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-10-16 03:12:11,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2860 states. [2021-10-16 03:12:11,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2860 to 2386. [2021-10-16 03:12:11,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2386 states, 2385 states have (on average 2.7819706498951784) internal successors, (6635), 2385 states have internal predecessors, (6635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:11,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2386 states to 2386 states and 6635 transitions. [2021-10-16 03:12:11,070 INFO L78 Accepts]: Start accepts. Automaton has 2386 states and 6635 transitions. Word has length 38 [2021-10-16 03:12:11,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:11,071 INFO L470 AbstractCegarLoop]: Abstraction has 2386 states and 6635 transitions. [2021-10-16 03:12:11,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:11,071 INFO L276 IsEmpty]: Start isEmpty. Operand 2386 states and 6635 transitions. [2021-10-16 03:12:11,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:11,074 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:11,074 INFO L512 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] [2021-10-16 03:12:11,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2021-10-16 03:12:11,074 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:11,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:11,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1968104795, now seen corresponding path program 158 times [2021-10-16 03:12:11,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:11,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253714183] [2021-10-16 03:12:11,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:11,075 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:11,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:11,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:11,206 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:11,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253714183] [2021-10-16 03:12:11,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253714183] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:11,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:11,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:12:11,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109630646] [2021-10-16 03:12:11,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:12:11,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:11,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:12:11,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:12:11,209 INFO L87 Difference]: Start difference. First operand 2386 states and 6635 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:11,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:11,673 INFO L93 Difference]: Finished difference Result 2764 states and 7472 transitions. [2021-10-16 03:12:11,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-16 03:12:11,673 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:11,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:11,678 INFO L225 Difference]: With dead ends: 2764 [2021-10-16 03:12:11,678 INFO L226 Difference]: Without dead ends: 2748 [2021-10-16 03:12:11,679 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 181.6ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-10-16 03:12:11,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2748 states. [2021-10-16 03:12:11,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2748 to 2380. [2021-10-16 03:12:11,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2380 states, 2379 states have (on average 2.781841109709962) internal successors, (6618), 2379 states have internal predecessors, (6618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:11,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2380 states to 2380 states and 6618 transitions. [2021-10-16 03:12:11,721 INFO L78 Accepts]: Start accepts. Automaton has 2380 states and 6618 transitions. Word has length 38 [2021-10-16 03:12:11,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:11,721 INFO L470 AbstractCegarLoop]: Abstraction has 2380 states and 6618 transitions. [2021-10-16 03:12:11,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:11,721 INFO L276 IsEmpty]: Start isEmpty. Operand 2380 states and 6618 transitions. [2021-10-16 03:12:11,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:11,724 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:11,724 INFO L512 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] [2021-10-16 03:12:11,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2021-10-16 03:12:11,725 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:11,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:11,725 INFO L82 PathProgramCache]: Analyzing trace with hash -35903221, now seen corresponding path program 159 times [2021-10-16 03:12:11,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:11,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160225465] [2021-10-16 03:12:11,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:11,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:11,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:11,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:11,845 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:11,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160225465] [2021-10-16 03:12:11,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160225465] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:11,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:11,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:12:11,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115449712] [2021-10-16 03:12:11,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:12:11,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:11,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:12:11,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:12:11,846 INFO L87 Difference]: Start difference. First operand 2380 states and 6618 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:12,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:12,191 INFO L93 Difference]: Finished difference Result 2620 states and 7168 transitions. [2021-10-16 03:12:12,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-16 03:12:12,191 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:12,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:12,196 INFO L225 Difference]: With dead ends: 2620 [2021-10-16 03:12:12,196 INFO L226 Difference]: Without dead ends: 2590 [2021-10-16 03:12:12,196 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 156.6ms TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2021-10-16 03:12:12,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2590 states. [2021-10-16 03:12:12,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2590 to 2358. [2021-10-16 03:12:12,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2358 states, 2357 states have (on average 2.7785320322443785) internal successors, (6549), 2357 states have internal predecessors, (6549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:12,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2358 states to 2358 states and 6549 transitions. [2021-10-16 03:12:12,239 INFO L78 Accepts]: Start accepts. Automaton has 2358 states and 6549 transitions. Word has length 38 [2021-10-16 03:12:12,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:12,240 INFO L470 AbstractCegarLoop]: Abstraction has 2358 states and 6549 transitions. [2021-10-16 03:12:12,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:12,240 INFO L276 IsEmpty]: Start isEmpty. Operand 2358 states and 6549 transitions. [2021-10-16 03:12:12,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:12,243 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:12,243 INFO L512 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] [2021-10-16 03:12:12,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2021-10-16 03:12:12,244 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:12,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:12,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1251343195, now seen corresponding path program 160 times [2021-10-16 03:12:12,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:12,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132982254] [2021-10-16 03:12:12,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:12,244 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:12,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:12,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:12,380 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:12,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132982254] [2021-10-16 03:12:12,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132982254] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:12,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:12,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:12:12,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114083002] [2021-10-16 03:12:12,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:12:12,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:12,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:12:12,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:12:12,382 INFO L87 Difference]: Start difference. First operand 2358 states and 6549 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:12,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:12,932 INFO L93 Difference]: Finished difference Result 2882 states and 7673 transitions. [2021-10-16 03:12:12,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-16 03:12:12,933 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:12,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:12,937 INFO L225 Difference]: With dead ends: 2882 [2021-10-16 03:12:12,938 INFO L226 Difference]: Without dead ends: 2816 [2021-10-16 03:12:12,938 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 200.9ms TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-10-16 03:12:12,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2816 states. [2021-10-16 03:12:12,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2816 to 2322. [2021-10-16 03:12:12,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2322 states, 2321 states have (on average 2.7802671262386904) internal successors, (6453), 2321 states have internal predecessors, (6453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:12,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2322 states to 2322 states and 6453 transitions. [2021-10-16 03:12:12,980 INFO L78 Accepts]: Start accepts. Automaton has 2322 states and 6453 transitions. Word has length 38 [2021-10-16 03:12:12,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:12,980 INFO L470 AbstractCegarLoop]: Abstraction has 2322 states and 6453 transitions. [2021-10-16 03:12:12,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:12,981 INFO L276 IsEmpty]: Start isEmpty. Operand 2322 states and 6453 transitions. [2021-10-16 03:12:12,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:12,983 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:12,984 INFO L512 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] [2021-10-16 03:12:12,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2021-10-16 03:12:12,984 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:12,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:12,984 INFO L82 PathProgramCache]: Analyzing trace with hash 926895035, now seen corresponding path program 161 times [2021-10-16 03:12:12,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:12,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009120164] [2021-10-16 03:12:12,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:12,985 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:13,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:13,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:13,098 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:13,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009120164] [2021-10-16 03:12:13,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009120164] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:13,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:13,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:12:13,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175570284] [2021-10-16 03:12:13,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:12:13,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:13,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:12:13,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:12:13,100 INFO L87 Difference]: Start difference. First operand 2322 states and 6453 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:13,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:13,564 INFO L93 Difference]: Finished difference Result 2758 states and 7401 transitions. [2021-10-16 03:12:13,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-16 03:12:13,564 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:13,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:13,569 INFO L225 Difference]: With dead ends: 2758 [2021-10-16 03:12:13,569 INFO L226 Difference]: Without dead ends: 2660 [2021-10-16 03:12:13,569 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 183.5ms TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2021-10-16 03:12:13,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2660 states. [2021-10-16 03:12:13,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2660 to 2232. [2021-10-16 03:12:13,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2232 states, 2231 states have (on average 2.790676826535186) internal successors, (6226), 2231 states have internal predecessors, (6226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:13,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 6226 transitions. [2021-10-16 03:12:13,609 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 6226 transitions. Word has length 38 [2021-10-16 03:12:13,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:13,610 INFO L470 AbstractCegarLoop]: Abstraction has 2232 states and 6226 transitions. [2021-10-16 03:12:13,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:13,610 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 6226 transitions. [2021-10-16 03:12:13,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:13,613 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:13,613 INFO L512 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] [2021-10-16 03:12:13,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2021-10-16 03:12:13,613 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:13,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:13,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1121412679, now seen corresponding path program 162 times [2021-10-16 03:12:13,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:13,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623520730] [2021-10-16 03:12:13,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:13,614 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:13,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:13,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:13,722 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:13,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623520730] [2021-10-16 03:12:13,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623520730] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:13,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:13,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:12:13,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560533829] [2021-10-16 03:12:13,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:12:13,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:13,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:12:13,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:12:13,724 INFO L87 Difference]: Start difference. First operand 2232 states and 6226 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:14,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:14,100 INFO L93 Difference]: Finished difference Result 2702 states and 7263 transitions. [2021-10-16 03:12:14,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-16 03:12:14,101 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:14,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:14,105 INFO L225 Difference]: With dead ends: 2702 [2021-10-16 03:12:14,106 INFO L226 Difference]: Without dead ends: 2694 [2021-10-16 03:12:14,106 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 168.7ms TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2021-10-16 03:12:14,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2694 states. [2021-10-16 03:12:14,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2694 to 2228. [2021-10-16 03:12:14,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2228 states, 2227 states have (on average 2.789402784014369) internal successors, (6212), 2227 states have internal predecessors, (6212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:14,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 6212 transitions. [2021-10-16 03:12:14,146 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 6212 transitions. Word has length 38 [2021-10-16 03:12:14,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:14,146 INFO L470 AbstractCegarLoop]: Abstraction has 2228 states and 6212 transitions. [2021-10-16 03:12:14,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:14,146 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 6212 transitions. [2021-10-16 03:12:14,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:14,149 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:14,150 INFO L512 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] [2021-10-16 03:12:14,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2021-10-16 03:12:14,150 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:14,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:14,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1140085863, now seen corresponding path program 163 times [2021-10-16 03:12:14,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:14,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480876760] [2021-10-16 03:12:14,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:14,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:14,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:14,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:14,249 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:14,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480876760] [2021-10-16 03:12:14,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480876760] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:14,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:14,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:12:14,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166659998] [2021-10-16 03:12:14,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:12:14,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:14,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:12:14,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:12:14,251 INFO L87 Difference]: Start difference. First operand 2228 states and 6212 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:14,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:14,685 INFO L93 Difference]: Finished difference Result 2704 states and 7260 transitions. [2021-10-16 03:12:14,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-16 03:12:14,685 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:14,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:14,690 INFO L225 Difference]: With dead ends: 2704 [2021-10-16 03:12:14,690 INFO L226 Difference]: Without dead ends: 2688 [2021-10-16 03:12:14,690 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 183.3ms TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2021-10-16 03:12:14,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2688 states. [2021-10-16 03:12:14,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2688 to 2222. [2021-10-16 03:12:14,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2222 states, 2221 states have (on average 2.7892841062584424) internal successors, (6195), 2221 states have internal predecessors, (6195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:14,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2222 states to 2222 states and 6195 transitions. [2021-10-16 03:12:14,734 INFO L78 Accepts]: Start accepts. Automaton has 2222 states and 6195 transitions. Word has length 38 [2021-10-16 03:12:14,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:14,735 INFO L470 AbstractCegarLoop]: Abstraction has 2222 states and 6195 transitions. [2021-10-16 03:12:14,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:14,735 INFO L276 IsEmpty]: Start isEmpty. Operand 2222 states and 6195 transitions. [2021-10-16 03:12:14,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:14,738 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:14,738 INFO L512 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] [2021-10-16 03:12:14,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2021-10-16 03:12:14,739 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:14,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:14,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1222679859, now seen corresponding path program 164 times [2021-10-16 03:12:14,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:14,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712358692] [2021-10-16 03:12:14,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:14,739 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:14,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:14,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:14,830 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:14,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712358692] [2021-10-16 03:12:14,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712358692] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:14,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:14,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:12:14,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998940943] [2021-10-16 03:12:14,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:12:14,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:14,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:12:14,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:12:14,832 INFO L87 Difference]: Start difference. First operand 2222 states and 6195 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:15,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:15,215 INFO L93 Difference]: Finished difference Result 2470 states and 6770 transitions. [2021-10-16 03:12:15,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-16 03:12:15,215 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:15,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:15,220 INFO L225 Difference]: With dead ends: 2470 [2021-10-16 03:12:15,220 INFO L226 Difference]: Without dead ends: 2440 [2021-10-16 03:12:15,220 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 206.8ms TimeCoverageRelationStatistics Valid=164, Invalid=436, Unknown=0, NotChecked=0, Total=600 [2021-10-16 03:12:15,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2021-10-16 03:12:15,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 2204. [2021-10-16 03:12:15,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2204 states, 2203 states have (on average 2.7889241942805265) internal successors, (6144), 2203 states have internal predecessors, (6144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:15,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2204 states to 2204 states and 6144 transitions. [2021-10-16 03:12:15,259 INFO L78 Accepts]: Start accepts. Automaton has 2204 states and 6144 transitions. Word has length 38 [2021-10-16 03:12:15,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:15,259 INFO L470 AbstractCegarLoop]: Abstraction has 2204 states and 6144 transitions. [2021-10-16 03:12:15,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:15,259 INFO L276 IsEmpty]: Start isEmpty. Operand 2204 states and 6144 transitions. [2021-10-16 03:12:15,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:15,262 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:15,262 INFO L512 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] [2021-10-16 03:12:15,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2021-10-16 03:12:15,262 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:15,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:15,263 INFO L82 PathProgramCache]: Analyzing trace with hash 2138319541, now seen corresponding path program 165 times [2021-10-16 03:12:15,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:15,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44699815] [2021-10-16 03:12:15,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:15,263 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:15,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:15,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:15,360 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:15,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44699815] [2021-10-16 03:12:15,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44699815] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:15,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:15,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:12:15,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170744576] [2021-10-16 03:12:15,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:12:15,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:15,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:12:15,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:12:15,361 INFO L87 Difference]: Start difference. First operand 2204 states and 6144 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:15,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:15,680 INFO L93 Difference]: Finished difference Result 2502 states and 6830 transitions. [2021-10-16 03:12:15,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-16 03:12:15,681 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:15,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:15,685 INFO L225 Difference]: With dead ends: 2502 [2021-10-16 03:12:15,686 INFO L226 Difference]: Without dead ends: 2478 [2021-10-16 03:12:15,686 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 153.7ms TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2021-10-16 03:12:15,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2478 states. [2021-10-16 03:12:15,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2478 to 2198. [2021-10-16 03:12:15,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2198 states, 2197 states have (on average 2.788802913063268) internal successors, (6127), 2197 states have internal predecessors, (6127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:15,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2198 states to 2198 states and 6127 transitions. [2021-10-16 03:12:15,727 INFO L78 Accepts]: Start accepts. Automaton has 2198 states and 6127 transitions. Word has length 38 [2021-10-16 03:12:15,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:15,727 INFO L470 AbstractCegarLoop]: Abstraction has 2198 states and 6127 transitions. [2021-10-16 03:12:15,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:15,727 INFO L276 IsEmpty]: Start isEmpty. Operand 2198 states and 6127 transitions. [2021-10-16 03:12:15,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:15,730 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:15,730 INFO L512 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] [2021-10-16 03:12:15,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2021-10-16 03:12:15,730 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:15,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:15,731 INFO L82 PathProgramCache]: Analyzing trace with hash 832294233, now seen corresponding path program 166 times [2021-10-16 03:12:15,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:15,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352273253] [2021-10-16 03:12:15,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:15,731 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:15,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:15,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:15,833 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:15,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352273253] [2021-10-16 03:12:15,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352273253] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:15,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:15,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-16 03:12:15,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956916309] [2021-10-16 03:12:15,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-16 03:12:15,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:15,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-16 03:12:15,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-10-16 03:12:15,837 INFO L87 Difference]: Start difference. First operand 2198 states and 6127 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:16,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:16,390 INFO L93 Difference]: Finished difference Result 2652 states and 7121 transitions. [2021-10-16 03:12:16,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-16 03:12:16,390 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:16,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:16,395 INFO L225 Difference]: With dead ends: 2652 [2021-10-16 03:12:16,395 INFO L226 Difference]: Without dead ends: 2590 [2021-10-16 03:12:16,395 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 253.7ms TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2021-10-16 03:12:16,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2590 states. [2021-10-16 03:12:16,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2590 to 2198. [2021-10-16 03:12:16,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2198 states, 2197 states have (on average 2.783340919435594) internal successors, (6115), 2197 states have internal predecessors, (6115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:16,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2198 states to 2198 states and 6115 transitions. [2021-10-16 03:12:16,438 INFO L78 Accepts]: Start accepts. Automaton has 2198 states and 6115 transitions. Word has length 38 [2021-10-16 03:12:16,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:16,438 INFO L470 AbstractCegarLoop]: Abstraction has 2198 states and 6115 transitions. [2021-10-16 03:12:16,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:16,438 INFO L276 IsEmpty]: Start isEmpty. Operand 2198 states and 6115 transitions. [2021-10-16 03:12:16,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:16,441 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:16,441 INFO L512 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] [2021-10-16 03:12:16,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2021-10-16 03:12:16,442 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:16,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:16,442 INFO L82 PathProgramCache]: Analyzing trace with hash 2131889963, now seen corresponding path program 167 times [2021-10-16 03:12:16,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:16,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33684095] [2021-10-16 03:12:16,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:16,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:16,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:16,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:16,531 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:16,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33684095] [2021-10-16 03:12:16,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33684095] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:16,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:16,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:12:16,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837708377] [2021-10-16 03:12:16,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:12:16,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:16,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:12:16,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:12:16,533 INFO L87 Difference]: Start difference. First operand 2198 states and 6115 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:16,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:16,980 INFO L93 Difference]: Finished difference Result 2642 states and 7082 transitions. [2021-10-16 03:12:16,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-16 03:12:16,980 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:16,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:16,985 INFO L225 Difference]: With dead ends: 2642 [2021-10-16 03:12:16,985 INFO L226 Difference]: Without dead ends: 2578 [2021-10-16 03:12:16,985 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 165.4ms TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2021-10-16 03:12:16,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2021-10-16 03:12:17,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 2182. [2021-10-16 03:12:17,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2182 states, 2181 states have (on average 2.7794589637780835) internal successors, (6062), 2181 states have internal predecessors, (6062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:17,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2182 states to 2182 states and 6062 transitions. [2021-10-16 03:12:17,024 INFO L78 Accepts]: Start accepts. Automaton has 2182 states and 6062 transitions. Word has length 38 [2021-10-16 03:12:17,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:17,025 INFO L470 AbstractCegarLoop]: Abstraction has 2182 states and 6062 transitions. [2021-10-16 03:12:17,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:17,025 INFO L276 IsEmpty]: Start isEmpty. Operand 2182 states and 6062 transitions. [2021-10-16 03:12:17,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:17,028 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:17,028 INFO L512 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] [2021-10-16 03:12:17,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2021-10-16 03:12:17,028 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:17,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:17,029 INFO L82 PathProgramCache]: Analyzing trace with hash 106252215, now seen corresponding path program 168 times [2021-10-16 03:12:17,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:17,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545645771] [2021-10-16 03:12:17,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:17,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:17,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:17,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:17,150 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:17,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545645771] [2021-10-16 03:12:17,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545645771] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:17,151 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:17,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-16 03:12:17,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955028426] [2021-10-16 03:12:17,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-16 03:12:17,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:17,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-16 03:12:17,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-10-16 03:12:17,152 INFO L87 Difference]: Start difference. First operand 2182 states and 6062 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:17,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:17,713 INFO L93 Difference]: Finished difference Result 2690 states and 7159 transitions. [2021-10-16 03:12:17,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-16 03:12:17,713 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:17,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:17,718 INFO L225 Difference]: With dead ends: 2690 [2021-10-16 03:12:17,718 INFO L226 Difference]: Without dead ends: 2600 [2021-10-16 03:12:17,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 230.7ms TimeCoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2021-10-16 03:12:17,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2600 states. [2021-10-16 03:12:17,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2600 to 2086. [2021-10-16 03:12:17,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2086 states, 2085 states have (on average 2.790887290167866) internal successors, (5819), 2085 states have internal predecessors, (5819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:17,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2086 states to 2086 states and 5819 transitions. [2021-10-16 03:12:17,759 INFO L78 Accepts]: Start accepts. Automaton has 2086 states and 5819 transitions. Word has length 38 [2021-10-16 03:12:17,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:17,759 INFO L470 AbstractCegarLoop]: Abstraction has 2086 states and 5819 transitions. [2021-10-16 03:12:17,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:17,759 INFO L276 IsEmpty]: Start isEmpty. Operand 2086 states and 5819 transitions. [2021-10-16 03:12:17,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:17,762 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:17,762 INFO L512 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] [2021-10-16 03:12:17,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2021-10-16 03:12:17,762 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:17,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:17,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1225405947, now seen corresponding path program 169 times [2021-10-16 03:12:17,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:17,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787620762] [2021-10-16 03:12:17,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:17,764 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:17,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:17,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:17,876 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:17,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787620762] [2021-10-16 03:12:17,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787620762] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:17,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:17,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-16 03:12:17,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551410393] [2021-10-16 03:12:17,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-16 03:12:17,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:17,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-16 03:12:17,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-10-16 03:12:17,878 INFO L87 Difference]: Start difference. First operand 2086 states and 5819 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:18,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:18,342 INFO L93 Difference]: Finished difference Result 2506 states and 6754 transitions. [2021-10-16 03:12:18,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-16 03:12:18,343 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:18,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:18,347 INFO L225 Difference]: With dead ends: 2506 [2021-10-16 03:12:18,347 INFO L226 Difference]: Without dead ends: 2434 [2021-10-16 03:12:18,347 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 183.7ms TimeCoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-10-16 03:12:18,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2434 states. [2021-10-16 03:12:18,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2434 to 2058. [2021-10-16 03:12:18,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2058 states, 2057 states have (on average 2.8011667476908118) internal successors, (5762), 2057 states have internal predecessors, (5762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:18,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2058 states to 2058 states and 5762 transitions. [2021-10-16 03:12:18,387 INFO L78 Accepts]: Start accepts. Automaton has 2058 states and 5762 transitions. Word has length 38 [2021-10-16 03:12:18,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:18,387 INFO L470 AbstractCegarLoop]: Abstraction has 2058 states and 5762 transitions. [2021-10-16 03:12:18,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:18,387 INFO L276 IsEmpty]: Start isEmpty. Operand 2058 states and 5762 transitions. [2021-10-16 03:12:18,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:18,390 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:18,390 INFO L512 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] [2021-10-16 03:12:18,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2021-10-16 03:12:18,390 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:18,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:18,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1347939981, now seen corresponding path program 170 times [2021-10-16 03:12:18,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:18,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676634655] [2021-10-16 03:12:18,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:18,391 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:18,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:18,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:18,466 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:18,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676634655] [2021-10-16 03:12:18,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676634655] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:18,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:18,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-16 03:12:18,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368038675] [2021-10-16 03:12:18,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-16 03:12:18,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:18,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-16 03:12:18,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-16 03:12:18,467 INFO L87 Difference]: Start difference. First operand 2058 states and 5762 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:18,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:18,707 INFO L93 Difference]: Finished difference Result 2392 states and 6548 transitions. [2021-10-16 03:12:18,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-16 03:12:18,707 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:18,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:18,711 INFO L225 Difference]: With dead ends: 2392 [2021-10-16 03:12:18,711 INFO L226 Difference]: Without dead ends: 2292 [2021-10-16 03:12:18,711 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 88.5ms TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-10-16 03:12:18,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2292 states. [2021-10-16 03:12:18,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2292 to 2086. [2021-10-16 03:12:18,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2086 states, 2085 states have (on average 2.7990407673860913) internal successors, (5836), 2085 states have internal predecessors, (5836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:18,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2086 states to 2086 states and 5836 transitions. [2021-10-16 03:12:18,748 INFO L78 Accepts]: Start accepts. Automaton has 2086 states and 5836 transitions. Word has length 38 [2021-10-16 03:12:18,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:18,748 INFO L470 AbstractCegarLoop]: Abstraction has 2086 states and 5836 transitions. [2021-10-16 03:12:18,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:18,748 INFO L276 IsEmpty]: Start isEmpty. Operand 2086 states and 5836 transitions. [2021-10-16 03:12:18,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:18,751 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:18,751 INFO L512 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] [2021-10-16 03:12:18,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2021-10-16 03:12:18,752 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:18,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:18,752 INFO L82 PathProgramCache]: Analyzing trace with hash -855610941, now seen corresponding path program 171 times [2021-10-16 03:12:18,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:18,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730282031] [2021-10-16 03:12:18,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:18,752 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:18,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:18,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:18,859 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:18,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730282031] [2021-10-16 03:12:18,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730282031] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:18,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:18,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:12:18,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210255877] [2021-10-16 03:12:18,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:12:18,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:18,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:12:18,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:12:18,861 INFO L87 Difference]: Start difference. First operand 2086 states and 5836 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:19,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:19,273 INFO L93 Difference]: Finished difference Result 2340 states and 6413 transitions. [2021-10-16 03:12:19,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-16 03:12:19,273 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:19,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:19,277 INFO L225 Difference]: With dead ends: 2340 [2021-10-16 03:12:19,277 INFO L226 Difference]: Without dead ends: 2312 [2021-10-16 03:12:19,278 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 170.0ms TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2021-10-16 03:12:19,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2312 states. [2021-10-16 03:12:19,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2312 to 2098. [2021-10-16 03:12:19,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2098 states, 2097 states have (on average 2.791607057701478) internal successors, (5854), 2097 states have internal predecessors, (5854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:19,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2098 states to 2098 states and 5854 transitions. [2021-10-16 03:12:19,317 INFO L78 Accepts]: Start accepts. Automaton has 2098 states and 5854 transitions. Word has length 38 [2021-10-16 03:12:19,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:19,317 INFO L470 AbstractCegarLoop]: Abstraction has 2098 states and 5854 transitions. [2021-10-16 03:12:19,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:19,318 INFO L276 IsEmpty]: Start isEmpty. Operand 2098 states and 5854 transitions. [2021-10-16 03:12:19,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:19,321 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:19,321 INFO L512 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] [2021-10-16 03:12:19,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2021-10-16 03:12:19,321 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:19,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:19,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1105843091, now seen corresponding path program 172 times [2021-10-16 03:12:19,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:19,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684809828] [2021-10-16 03:12:19,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:19,322 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:19,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:19,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:19,441 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:19,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684809828] [2021-10-16 03:12:19,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684809828] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:19,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:19,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-16 03:12:19,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368971312] [2021-10-16 03:12:19,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 03:12:19,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:19,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 03:12:19,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:12:19,443 INFO L87 Difference]: Start difference. First operand 2098 states and 5854 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:19,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:19,807 INFO L93 Difference]: Finished difference Result 2652 states and 7139 transitions. [2021-10-16 03:12:19,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-16 03:12:19,807 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:19,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:19,812 INFO L225 Difference]: With dead ends: 2652 [2021-10-16 03:12:19,812 INFO L226 Difference]: Without dead ends: 2644 [2021-10-16 03:12:19,812 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 156.3ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-10-16 03:12:19,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2644 states. [2021-10-16 03:12:19,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2644 to 2122. [2021-10-16 03:12:19,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2122 states, 2121 states have (on average 2.7911362564827913) internal successors, (5920), 2121 states have internal predecessors, (5920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:19,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2122 states to 2122 states and 5920 transitions. [2021-10-16 03:12:19,853 INFO L78 Accepts]: Start accepts. Automaton has 2122 states and 5920 transitions. Word has length 38 [2021-10-16 03:12:19,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:19,854 INFO L470 AbstractCegarLoop]: Abstraction has 2122 states and 5920 transitions. [2021-10-16 03:12:19,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:19,854 INFO L276 IsEmpty]: Start isEmpty. Operand 2122 states and 5920 transitions. [2021-10-16 03:12:19,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:19,857 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:19,857 INFO L512 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] [2021-10-16 03:12:19,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2021-10-16 03:12:19,857 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:19,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:19,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1419360413, now seen corresponding path program 173 times [2021-10-16 03:12:19,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:19,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091912648] [2021-10-16 03:12:19,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:19,858 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:19,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:19,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:19,966 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:19,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091912648] [2021-10-16 03:12:19,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091912648] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:19,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:19,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:12:19,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27147104] [2021-10-16 03:12:19,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:12:19,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:19,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:12:19,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:12:19,967 INFO L87 Difference]: Start difference. First operand 2122 states and 5920 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:20,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:20,423 INFO L93 Difference]: Finished difference Result 2694 states and 7216 transitions. [2021-10-16 03:12:20,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-16 03:12:20,435 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:20,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:20,442 INFO L225 Difference]: With dead ends: 2694 [2021-10-16 03:12:20,443 INFO L226 Difference]: Without dead ends: 2660 [2021-10-16 03:12:20,443 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 197.8ms TimeCoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2021-10-16 03:12:20,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2660 states. [2021-10-16 03:12:20,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2660 to 2098. [2021-10-16 03:12:20,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2098 states, 2097 states have (on average 2.7963757749165477) internal successors, (5864), 2097 states have internal predecessors, (5864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:20,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2098 states to 2098 states and 5864 transitions. [2021-10-16 03:12:20,489 INFO L78 Accepts]: Start accepts. Automaton has 2098 states and 5864 transitions. Word has length 38 [2021-10-16 03:12:20,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:20,489 INFO L470 AbstractCegarLoop]: Abstraction has 2098 states and 5864 transitions. [2021-10-16 03:12:20,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:20,490 INFO L276 IsEmpty]: Start isEmpty. Operand 2098 states and 5864 transitions. [2021-10-16 03:12:20,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:20,492 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:20,493 INFO L512 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] [2021-10-16 03:12:20,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2021-10-16 03:12:20,493 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:20,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:20,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1646356653, now seen corresponding path program 174 times [2021-10-16 03:12:20,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:20,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222067946] [2021-10-16 03:12:20,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:20,494 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:20,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:20,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:20,587 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:20,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222067946] [2021-10-16 03:12:20,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222067946] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:20,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:20,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:12:20,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180272138] [2021-10-16 03:12:20,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:12:20,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:20,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:12:20,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:12:20,589 INFO L87 Difference]: Start difference. First operand 2098 states and 5864 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:21,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:21,009 INFO L93 Difference]: Finished difference Result 2328 states and 6328 transitions. [2021-10-16 03:12:21,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-16 03:12:21,009 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:21,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:21,013 INFO L225 Difference]: With dead ends: 2328 [2021-10-16 03:12:21,013 INFO L226 Difference]: Without dead ends: 2218 [2021-10-16 03:12:21,013 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 158.2ms TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-10-16 03:12:21,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2218 states. [2021-10-16 03:12:21,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2218 to 2052. [2021-10-16 03:12:21,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2052 states, 2051 states have (on average 2.80107264748903) internal successors, (5745), 2051 states have internal predecessors, (5745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:21,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 5745 transitions. [2021-10-16 03:12:21,050 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 5745 transitions. Word has length 38 [2021-10-16 03:12:21,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:21,050 INFO L470 AbstractCegarLoop]: Abstraction has 2052 states and 5745 transitions. [2021-10-16 03:12:21,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:21,050 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 5745 transitions. [2021-10-16 03:12:21,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:21,053 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:21,053 INFO L512 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] [2021-10-16 03:12:21,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2021-10-16 03:12:21,054 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:21,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:21,054 INFO L82 PathProgramCache]: Analyzing trace with hash 895603571, now seen corresponding path program 175 times [2021-10-16 03:12:21,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:21,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900992084] [2021-10-16 03:12:21,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:21,054 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:21,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:21,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:21,143 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:21,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900992084] [2021-10-16 03:12:21,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900992084] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:21,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:21,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:12:21,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125623747] [2021-10-16 03:12:21,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:12:21,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:21,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:12:21,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:12:21,144 INFO L87 Difference]: Start difference. First operand 2052 states and 5745 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:21,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:21,555 INFO L93 Difference]: Finished difference Result 2430 states and 6568 transitions. [2021-10-16 03:12:21,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-16 03:12:21,556 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:21,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:21,560 INFO L225 Difference]: With dead ends: 2430 [2021-10-16 03:12:21,560 INFO L226 Difference]: Without dead ends: 2396 [2021-10-16 03:12:21,560 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 165.1ms TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-10-16 03:12:21,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2396 states. [2021-10-16 03:12:21,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2396 to 2062. [2021-10-16 03:12:21,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 2.7986414361960215) internal successors, (5768), 2061 states have internal predecessors, (5768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:21,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 5768 transitions. [2021-10-16 03:12:21,600 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 5768 transitions. Word has length 38 [2021-10-16 03:12:21,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:21,600 INFO L470 AbstractCegarLoop]: Abstraction has 2062 states and 5768 transitions. [2021-10-16 03:12:21,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:21,600 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 5768 transitions. [2021-10-16 03:12:21,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:21,603 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:21,603 INFO L512 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] [2021-10-16 03:12:21,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2021-10-16 03:12:21,604 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:21,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:21,604 INFO L82 PathProgramCache]: Analyzing trace with hash -2089944669, now seen corresponding path program 176 times [2021-10-16 03:12:21,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:21,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186363342] [2021-10-16 03:12:21,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:21,604 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:21,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:21,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:21,722 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:21,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186363342] [2021-10-16 03:12:21,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186363342] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:21,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:21,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:12:21,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285072778] [2021-10-16 03:12:21,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:12:21,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:21,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:12:21,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:12:21,724 INFO L87 Difference]: Start difference. First operand 2062 states and 5768 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:22,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:22,353 INFO L93 Difference]: Finished difference Result 2454 states and 6614 transitions. [2021-10-16 03:12:22,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-16 03:12:22,353 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:22,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:22,360 INFO L225 Difference]: With dead ends: 2454 [2021-10-16 03:12:22,360 INFO L226 Difference]: Without dead ends: 2432 [2021-10-16 03:12:22,360 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 271.9ms TimeCoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2021-10-16 03:12:22,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2021-10-16 03:12:22,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 2054. [2021-10-16 03:12:22,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2054 states, 2053 states have (on average 2.800779347296639) internal successors, (5750), 2053 states have internal predecessors, (5750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:22,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 5750 transitions. [2021-10-16 03:12:22,417 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 5750 transitions. Word has length 38 [2021-10-16 03:12:22,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:22,418 INFO L470 AbstractCegarLoop]: Abstraction has 2054 states and 5750 transitions. [2021-10-16 03:12:22,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:22,418 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 5750 transitions. [2021-10-16 03:12:22,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:22,423 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:22,423 INFO L512 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] [2021-10-16 03:12:22,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2021-10-16 03:12:22,423 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:22,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:22,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1374161165, now seen corresponding path program 177 times [2021-10-16 03:12:22,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:22,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893044940] [2021-10-16 03:12:22,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:22,425 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:22,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:22,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:22,564 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:22,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893044940] [2021-10-16 03:12:22,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893044940] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:22,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:22,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-16 03:12:22,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762365953] [2021-10-16 03:12:22,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 03:12:22,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:22,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 03:12:22,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:12:22,566 INFO L87 Difference]: Start difference. First operand 2054 states and 5750 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:22,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:22,932 INFO L93 Difference]: Finished difference Result 2662 states and 7149 transitions. [2021-10-16 03:12:22,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-16 03:12:22,932 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:22,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:22,937 INFO L225 Difference]: With dead ends: 2662 [2021-10-16 03:12:22,937 INFO L226 Difference]: Without dead ends: 2654 [2021-10-16 03:12:22,937 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 159.0ms TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-10-16 03:12:22,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2654 states. [2021-10-16 03:12:22,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2654 to 2074. [2021-10-16 03:12:22,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2074 states, 2073 states have (on average 2.7998070429329474) internal successors, (5804), 2073 states have internal predecessors, (5804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:22,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 5804 transitions. [2021-10-16 03:12:22,978 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 5804 transitions. Word has length 38 [2021-10-16 03:12:22,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:22,979 INFO L470 AbstractCegarLoop]: Abstraction has 2074 states and 5804 transitions. [2021-10-16 03:12:22,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:22,979 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 5804 transitions. [2021-10-16 03:12:22,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:22,982 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:22,982 INFO L512 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] [2021-10-16 03:12:22,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2021-10-16 03:12:22,982 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:22,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:22,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1834505901, now seen corresponding path program 178 times [2021-10-16 03:12:22,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:22,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930242216] [2021-10-16 03:12:22,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:22,983 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:22,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:23,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:23,078 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:23,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930242216] [2021-10-16 03:12:23,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930242216] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:23,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:23,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:12:23,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965045666] [2021-10-16 03:12:23,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:12:23,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:23,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:12:23,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:12:23,080 INFO L87 Difference]: Start difference. First operand 2074 states and 5804 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:23,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:23,447 INFO L93 Difference]: Finished difference Result 2670 states and 7151 transitions. [2021-10-16 03:12:23,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-16 03:12:23,447 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:23,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:23,452 INFO L225 Difference]: With dead ends: 2670 [2021-10-16 03:12:23,452 INFO L226 Difference]: Without dead ends: 2634 [2021-10-16 03:12:23,452 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 165.2ms TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2021-10-16 03:12:23,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2634 states. [2021-10-16 03:12:23,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2634 to 2070. [2021-10-16 03:12:23,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2070 states, 2069 states have (on average 2.7994200096665054) internal successors, (5792), 2069 states have internal predecessors, (5792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:23,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2070 states to 2070 states and 5792 transitions. [2021-10-16 03:12:23,494 INFO L78 Accepts]: Start accepts. Automaton has 2070 states and 5792 transitions. Word has length 38 [2021-10-16 03:12:23,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:23,494 INFO L470 AbstractCegarLoop]: Abstraction has 2070 states and 5792 transitions. [2021-10-16 03:12:23,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:23,494 INFO L276 IsEmpty]: Start isEmpty. Operand 2070 states and 5792 transitions. [2021-10-16 03:12:23,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:23,497 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:23,497 INFO L512 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] [2021-10-16 03:12:23,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2021-10-16 03:12:23,498 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:23,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:23,498 INFO L82 PathProgramCache]: Analyzing trace with hash -983521059, now seen corresponding path program 179 times [2021-10-16 03:12:23,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:23,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041732881] [2021-10-16 03:12:23,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:23,498 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:23,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:23,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:23,588 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:23,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041732881] [2021-10-16 03:12:23,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041732881] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:23,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:23,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-16 03:12:23,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781783702] [2021-10-16 03:12:23,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 03:12:23,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:23,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 03:12:23,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:12:23,589 INFO L87 Difference]: Start difference. First operand 2070 states and 5792 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:23,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:23,941 INFO L93 Difference]: Finished difference Result 2552 states and 6904 transitions. [2021-10-16 03:12:23,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-16 03:12:23,942 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:23,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:23,946 INFO L225 Difference]: With dead ends: 2552 [2021-10-16 03:12:23,947 INFO L226 Difference]: Without dead ends: 2544 [2021-10-16 03:12:23,947 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 154.5ms TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2021-10-16 03:12:23,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2544 states. [2021-10-16 03:12:23,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2544 to 2072. [2021-10-16 03:12:23,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 2071 states have (on average 2.7981651376146788) internal successors, (5795), 2071 states have internal predecessors, (5795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:23,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 5795 transitions. [2021-10-16 03:12:23,987 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 5795 transitions. Word has length 38 [2021-10-16 03:12:23,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:23,987 INFO L470 AbstractCegarLoop]: Abstraction has 2072 states and 5795 transitions. [2021-10-16 03:12:23,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:23,987 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 5795 transitions. [2021-10-16 03:12:23,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:23,990 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:23,990 INFO L512 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] [2021-10-16 03:12:23,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2021-10-16 03:12:23,990 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:23,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:23,991 INFO L82 PathProgramCache]: Analyzing trace with hash 786242733, now seen corresponding path program 180 times [2021-10-16 03:12:23,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:23,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488015619] [2021-10-16 03:12:23,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:23,991 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:24,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:24,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:24,080 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:24,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488015619] [2021-10-16 03:12:24,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488015619] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:24,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:24,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:12:24,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588686538] [2021-10-16 03:12:24,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:12:24,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:24,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:12:24,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:12:24,081 INFO L87 Difference]: Start difference. First operand 2072 states and 5795 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:24,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:24,470 INFO L93 Difference]: Finished difference Result 2566 states and 6933 transitions. [2021-10-16 03:12:24,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-16 03:12:24,471 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:24,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:24,475 INFO L225 Difference]: With dead ends: 2566 [2021-10-16 03:12:24,476 INFO L226 Difference]: Without dead ends: 2558 [2021-10-16 03:12:24,476 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 182.2ms TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2021-10-16 03:12:24,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2558 states. [2021-10-16 03:12:24,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2558 to 2070. [2021-10-16 03:12:24,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2070 states, 2069 states have (on average 2.7984533591106815) internal successors, (5790), 2069 states have internal predecessors, (5790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:24,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2070 states to 2070 states and 5790 transitions. [2021-10-16 03:12:24,516 INFO L78 Accepts]: Start accepts. Automaton has 2070 states and 5790 transitions. Word has length 38 [2021-10-16 03:12:24,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:24,516 INFO L470 AbstractCegarLoop]: Abstraction has 2070 states and 5790 transitions. [2021-10-16 03:12:24,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:24,516 INFO L276 IsEmpty]: Start isEmpty. Operand 2070 states and 5790 transitions. [2021-10-16 03:12:24,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:24,519 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:24,519 INFO L512 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] [2021-10-16 03:12:24,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2021-10-16 03:12:24,519 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:24,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:24,520 INFO L82 PathProgramCache]: Analyzing trace with hash 599239123, now seen corresponding path program 181 times [2021-10-16 03:12:24,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:24,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483142311] [2021-10-16 03:12:24,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:24,520 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:24,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:24,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:24,613 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:24,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483142311] [2021-10-16 03:12:24,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483142311] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:24,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:24,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:12:24,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536828335] [2021-10-16 03:12:24,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:12:24,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:24,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:12:24,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:12:24,614 INFO L87 Difference]: Start difference. First operand 2070 states and 5790 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:25,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:25,030 INFO L93 Difference]: Finished difference Result 2574 states and 6943 transitions. [2021-10-16 03:12:25,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-16 03:12:25,031 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:25,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:25,035 INFO L225 Difference]: With dead ends: 2574 [2021-10-16 03:12:25,036 INFO L226 Difference]: Without dead ends: 2540 [2021-10-16 03:12:25,036 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 177.8ms TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2021-10-16 03:12:25,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2540 states. [2021-10-16 03:12:25,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2540 to 2064. [2021-10-16 03:12:25,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 2063 states have (on average 2.7944740668928745) internal successors, (5765), 2063 states have internal predecessors, (5765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:25,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 5765 transitions. [2021-10-16 03:12:25,080 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 5765 transitions. Word has length 38 [2021-10-16 03:12:25,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:25,080 INFO L470 AbstractCegarLoop]: Abstraction has 2064 states and 5765 transitions. [2021-10-16 03:12:25,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:25,080 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 5765 transitions. [2021-10-16 03:12:25,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:25,083 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:25,083 INFO L512 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] [2021-10-16 03:12:25,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2021-10-16 03:12:25,084 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:25,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:25,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1908658179, now seen corresponding path program 182 times [2021-10-16 03:12:25,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:25,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009795505] [2021-10-16 03:12:25,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:25,084 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:25,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:25,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:25,180 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:25,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009795505] [2021-10-16 03:12:25,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009795505] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:25,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:25,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:12:25,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807007922] [2021-10-16 03:12:25,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:12:25,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:25,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:12:25,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:12:25,181 INFO L87 Difference]: Start difference. First operand 2064 states and 5765 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:25,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:25,614 INFO L93 Difference]: Finished difference Result 2562 states and 6917 transitions. [2021-10-16 03:12:25,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-16 03:12:25,615 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:25,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:25,619 INFO L225 Difference]: With dead ends: 2562 [2021-10-16 03:12:25,619 INFO L226 Difference]: Without dead ends: 2538 [2021-10-16 03:12:25,619 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 205.6ms TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-10-16 03:12:25,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2538 states. [2021-10-16 03:12:25,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2538 to 2054. [2021-10-16 03:12:25,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2054 states, 2053 states have (on average 2.79980516317584) internal successors, (5748), 2053 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:25,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 5748 transitions. [2021-10-16 03:12:25,657 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 5748 transitions. Word has length 38 [2021-10-16 03:12:25,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:25,658 INFO L470 AbstractCegarLoop]: Abstraction has 2054 states and 5748 transitions. [2021-10-16 03:12:25,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:25,658 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 5748 transitions. [2021-10-16 03:12:25,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:25,661 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:25,661 INFO L512 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] [2021-10-16 03:12:25,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2021-10-16 03:12:25,661 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:25,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:25,661 INFO L82 PathProgramCache]: Analyzing trace with hash -652626957, now seen corresponding path program 183 times [2021-10-16 03:12:25,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:25,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391992633] [2021-10-16 03:12:25,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:25,662 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:25,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:25,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:25,747 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:25,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391992633] [2021-10-16 03:12:25,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391992633] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:25,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:25,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-16 03:12:25,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192880767] [2021-10-16 03:12:25,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 03:12:25,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:25,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 03:12:25,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:12:25,749 INFO L87 Difference]: Start difference. First operand 2054 states and 5748 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:26,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:26,023 INFO L93 Difference]: Finished difference Result 2360 states and 6445 transitions. [2021-10-16 03:12:26,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-16 03:12:26,024 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:26,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:26,028 INFO L225 Difference]: With dead ends: 2360 [2021-10-16 03:12:26,028 INFO L226 Difference]: Without dead ends: 2268 [2021-10-16 03:12:26,028 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 114.0ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-10-16 03:12:26,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2268 states. [2021-10-16 03:12:26,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2268 to 2066. [2021-10-16 03:12:26,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2066 states, 2065 states have (on average 2.7932203389830508) internal successors, (5768), 2065 states have internal predecessors, (5768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:26,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2066 states to 2066 states and 5768 transitions. [2021-10-16 03:12:26,067 INFO L78 Accepts]: Start accepts. Automaton has 2066 states and 5768 transitions. Word has length 38 [2021-10-16 03:12:26,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:26,067 INFO L470 AbstractCegarLoop]: Abstraction has 2066 states and 5768 transitions. [2021-10-16 03:12:26,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:26,067 INFO L276 IsEmpty]: Start isEmpty. Operand 2066 states and 5768 transitions. [2021-10-16 03:12:26,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:26,070 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:26,070 INFO L512 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] [2021-10-16 03:12:26,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2021-10-16 03:12:26,070 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:26,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:26,070 INFO L82 PathProgramCache]: Analyzing trace with hash -160297917, now seen corresponding path program 184 times [2021-10-16 03:12:26,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:26,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591678820] [2021-10-16 03:12:26,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:26,071 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:26,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:26,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:26,214 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:26,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591678820] [2021-10-16 03:12:26,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591678820] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:26,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:26,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:12:26,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291878106] [2021-10-16 03:12:26,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:12:26,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:26,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:12:26,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:12:26,216 INFO L87 Difference]: Start difference. First operand 2066 states and 5768 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:26,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:26,696 INFO L93 Difference]: Finished difference Result 2338 states and 6383 transitions. [2021-10-16 03:12:26,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-16 03:12:26,697 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:26,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:26,701 INFO L225 Difference]: With dead ends: 2338 [2021-10-16 03:12:26,701 INFO L226 Difference]: Without dead ends: 2310 [2021-10-16 03:12:26,701 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 241.4ms TimeCoverageRelationStatistics Valid=164, Invalid=436, Unknown=0, NotChecked=0, Total=600 [2021-10-16 03:12:26,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2021-10-16 03:12:26,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 2080. [2021-10-16 03:12:26,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2080 states, 2079 states have (on average 2.7854737854737857) internal successors, (5791), 2079 states have internal predecessors, (5791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:26,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 5791 transitions. [2021-10-16 03:12:26,739 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 5791 transitions. Word has length 38 [2021-10-16 03:12:26,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:26,739 INFO L470 AbstractCegarLoop]: Abstraction has 2080 states and 5791 transitions. [2021-10-16 03:12:26,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:26,740 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 5791 transitions. [2021-10-16 03:12:26,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:26,743 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:26,743 INFO L512 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] [2021-10-16 03:12:26,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2021-10-16 03:12:26,743 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:26,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:26,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1801156115, now seen corresponding path program 185 times [2021-10-16 03:12:26,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:26,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876358783] [2021-10-16 03:12:26,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:26,744 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:26,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:26,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:26,857 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:26,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876358783] [2021-10-16 03:12:26,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876358783] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:26,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:26,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:12:26,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334297336] [2021-10-16 03:12:26,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:12:26,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:26,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:12:26,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:12:26,858 INFO L87 Difference]: Start difference. First operand 2080 states and 5791 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:27,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:27,284 INFO L93 Difference]: Finished difference Result 2632 states and 7044 transitions. [2021-10-16 03:12:27,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-16 03:12:27,285 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:27,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:27,290 INFO L225 Difference]: With dead ends: 2632 [2021-10-16 03:12:27,290 INFO L226 Difference]: Without dead ends: 2624 [2021-10-16 03:12:27,290 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 205.4ms TimeCoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2021-10-16 03:12:27,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2624 states. [2021-10-16 03:12:27,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2624 to 2086. [2021-10-16 03:12:27,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2086 states, 2085 states have (on average 2.7827338129496404) internal successors, (5802), 2085 states have internal predecessors, (5802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:27,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2086 states to 2086 states and 5802 transitions. [2021-10-16 03:12:27,332 INFO L78 Accepts]: Start accepts. Automaton has 2086 states and 5802 transitions. Word has length 38 [2021-10-16 03:12:27,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:27,332 INFO L470 AbstractCegarLoop]: Abstraction has 2086 states and 5802 transitions. [2021-10-16 03:12:27,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:27,332 INFO L276 IsEmpty]: Start isEmpty. Operand 2086 states and 5802 transitions. [2021-10-16 03:12:27,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:27,335 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:27,335 INFO L512 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] [2021-10-16 03:12:27,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2021-10-16 03:12:27,336 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:27,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:27,336 INFO L82 PathProgramCache]: Analyzing trace with hash -724047389, now seen corresponding path program 186 times [2021-10-16 03:12:27,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:27,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603424134] [2021-10-16 03:12:27,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:27,336 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:27,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:27,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:27,469 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:27,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603424134] [2021-10-16 03:12:27,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603424134] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:27,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:27,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:12:27,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053206817] [2021-10-16 03:12:27,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:12:27,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:27,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:12:27,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:12:27,471 INFO L87 Difference]: Start difference. First operand 2086 states and 5802 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:27,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:27,988 INFO L93 Difference]: Finished difference Result 2672 states and 7118 transitions. [2021-10-16 03:12:27,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-16 03:12:27,988 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:27,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:27,993 INFO L225 Difference]: With dead ends: 2672 [2021-10-16 03:12:27,993 INFO L226 Difference]: Without dead ends: 2638 [2021-10-16 03:12:27,993 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 253.1ms TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2021-10-16 03:12:27,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2638 states. [2021-10-16 03:12:28,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2638 to 2062. [2021-10-16 03:12:28,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 2.7918486171761283) internal successors, (5754), 2061 states have internal predecessors, (5754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:28,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 5754 transitions. [2021-10-16 03:12:28,035 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 5754 transitions. Word has length 38 [2021-10-16 03:12:28,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:28,035 INFO L470 AbstractCegarLoop]: Abstraction has 2062 states and 5754 transitions. [2021-10-16 03:12:28,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:28,036 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 5754 transitions. [2021-10-16 03:12:28,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:28,038 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:28,039 INFO L512 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] [2021-10-16 03:12:28,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2021-10-16 03:12:28,039 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:28,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:28,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1007731565, now seen corresponding path program 187 times [2021-10-16 03:12:28,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:28,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999339054] [2021-10-16 03:12:28,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:28,040 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:28,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:28,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:28,161 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:28,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999339054] [2021-10-16 03:12:28,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999339054] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:28,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:28,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:12:28,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583188259] [2021-10-16 03:12:28,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:12:28,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:28,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:12:28,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:12:28,162 INFO L87 Difference]: Start difference. First operand 2062 states and 5754 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:28,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:28,551 INFO L93 Difference]: Finished difference Result 2250 states and 6179 transitions. [2021-10-16 03:12:28,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-16 03:12:28,552 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:28,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:28,556 INFO L225 Difference]: With dead ends: 2250 [2021-10-16 03:12:28,556 INFO L226 Difference]: Without dead ends: 2234 [2021-10-16 03:12:28,556 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 205.7ms TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2021-10-16 03:12:28,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2021-10-16 03:12:28,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 2060. [2021-10-16 03:12:28,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2060 states, 2059 states have (on average 2.7921321029626034) internal successors, (5749), 2059 states have internal predecessors, (5749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:28,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2060 states to 2060 states and 5749 transitions. [2021-10-16 03:12:28,610 INFO L78 Accepts]: Start accepts. Automaton has 2060 states and 5749 transitions. Word has length 38 [2021-10-16 03:12:28,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:28,610 INFO L470 AbstractCegarLoop]: Abstraction has 2060 states and 5749 transitions. [2021-10-16 03:12:28,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:28,611 INFO L276 IsEmpty]: Start isEmpty. Operand 2060 states and 5749 transitions. [2021-10-16 03:12:28,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:28,613 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:28,613 INFO L512 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] [2021-10-16 03:12:28,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2021-10-16 03:12:28,614 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:28,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:28,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1835938237, now seen corresponding path program 188 times [2021-10-16 03:12:28,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:28,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088572686] [2021-10-16 03:12:28,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:28,615 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:28,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:28,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:28,735 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:28,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088572686] [2021-10-16 03:12:28,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088572686] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:28,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:28,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-16 03:12:28,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453706907] [2021-10-16 03:12:28,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-16 03:12:28,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:28,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-16 03:12:28,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-10-16 03:12:28,736 INFO L87 Difference]: Start difference. First operand 2060 states and 5749 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:29,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:29,229 INFO L93 Difference]: Finished difference Result 2334 states and 6352 transitions. [2021-10-16 03:12:29,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-16 03:12:29,230 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:29,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:29,234 INFO L225 Difference]: With dead ends: 2334 [2021-10-16 03:12:29,234 INFO L226 Difference]: Without dead ends: 2314 [2021-10-16 03:12:29,234 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 195.9ms TimeCoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-10-16 03:12:29,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2021-10-16 03:12:29,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 2066. [2021-10-16 03:12:29,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2066 states, 2065 states have (on average 2.788377723970944) internal successors, (5758), 2065 states have internal predecessors, (5758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:29,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2066 states to 2066 states and 5758 transitions. [2021-10-16 03:12:29,271 INFO L78 Accepts]: Start accepts. Automaton has 2066 states and 5758 transitions. Word has length 38 [2021-10-16 03:12:29,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:29,271 INFO L470 AbstractCegarLoop]: Abstraction has 2066 states and 5758 transitions. [2021-10-16 03:12:29,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:29,271 INFO L276 IsEmpty]: Start isEmpty. Operand 2066 states and 5758 transitions. [2021-10-16 03:12:29,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:29,274 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:29,274 INFO L512 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] [2021-10-16 03:12:29,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2021-10-16 03:12:29,275 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:29,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:29,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1550188151, now seen corresponding path program 189 times [2021-10-16 03:12:29,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:29,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307538906] [2021-10-16 03:12:29,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:29,276 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:29,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:29,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:29,416 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:29,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307538906] [2021-10-16 03:12:29,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307538906] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:29,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:29,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:12:29,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942133522] [2021-10-16 03:12:29,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:12:29,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:29,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:12:29,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:12:29,418 INFO L87 Difference]: Start difference. First operand 2066 states and 5758 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:29,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:29,911 INFO L93 Difference]: Finished difference Result 2588 states and 6942 transitions. [2021-10-16 03:12:29,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-16 03:12:29,912 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:29,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:29,916 INFO L225 Difference]: With dead ends: 2588 [2021-10-16 03:12:29,916 INFO L226 Difference]: Without dead ends: 2570 [2021-10-16 03:12:29,917 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 229.9ms TimeCoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2021-10-16 03:12:29,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2021-10-16 03:12:29,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 2068. [2021-10-16 03:12:29,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2068 states, 2067 states have (on average 2.7871311078858247) internal successors, (5761), 2067 states have internal predecessors, (5761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:29,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2068 states to 2068 states and 5761 transitions. [2021-10-16 03:12:29,955 INFO L78 Accepts]: Start accepts. Automaton has 2068 states and 5761 transitions. Word has length 38 [2021-10-16 03:12:29,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:29,955 INFO L470 AbstractCegarLoop]: Abstraction has 2068 states and 5761 transitions. [2021-10-16 03:12:29,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:29,955 INFO L276 IsEmpty]: Start isEmpty. Operand 2068 states and 5761 transitions. [2021-10-16 03:12:29,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:29,958 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:29,958 INFO L512 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] [2021-10-16 03:12:29,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2021-10-16 03:12:29,958 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:29,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:29,959 INFO L82 PathProgramCache]: Analyzing trace with hash -240769095, now seen corresponding path program 190 times [2021-10-16 03:12:29,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:29,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850393078] [2021-10-16 03:12:29,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:29,959 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:29,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:30,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:30,111 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:30,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850393078] [2021-10-16 03:12:30,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850393078] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:30,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:30,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-16 03:12:30,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024084864] [2021-10-16 03:12:30,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-16 03:12:30,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:30,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-16 03:12:30,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-10-16 03:12:30,113 INFO L87 Difference]: Start difference. First operand 2068 states and 5761 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:30,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:30,721 INFO L93 Difference]: Finished difference Result 2628 states and 7018 transitions. [2021-10-16 03:12:30,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-16 03:12:30,722 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:30,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:30,726 INFO L225 Difference]: With dead ends: 2628 [2021-10-16 03:12:30,727 INFO L226 Difference]: Without dead ends: 2606 [2021-10-16 03:12:30,727 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 296.9ms TimeCoverageRelationStatistics Valid=197, Invalid=733, Unknown=0, NotChecked=0, Total=930 [2021-10-16 03:12:30,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2606 states. [2021-10-16 03:12:30,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2606 to 2060. [2021-10-16 03:12:30,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2060 states, 2059 states have (on average 2.7911607576493442) internal successors, (5747), 2059 states have internal predecessors, (5747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:30,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2060 states to 2060 states and 5747 transitions. [2021-10-16 03:12:30,765 INFO L78 Accepts]: Start accepts. Automaton has 2060 states and 5747 transitions. Word has length 38 [2021-10-16 03:12:30,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:30,765 INFO L470 AbstractCegarLoop]: Abstraction has 2060 states and 5747 transitions. [2021-10-16 03:12:30,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:30,766 INFO L276 IsEmpty]: Start isEmpty. Operand 2060 states and 5747 transitions. [2021-10-16 03:12:30,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:30,768 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:30,768 INFO L512 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] [2021-10-16 03:12:30,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2021-10-16 03:12:30,769 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:30,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:30,769 INFO L82 PathProgramCache]: Analyzing trace with hash 2065816515, now seen corresponding path program 191 times [2021-10-16 03:12:30,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:30,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424864171] [2021-10-16 03:12:30,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:30,771 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:30,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:30,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:30,897 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:30,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424864171] [2021-10-16 03:12:30,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424864171] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:30,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:30,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-16 03:12:30,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037229143] [2021-10-16 03:12:30,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-16 03:12:30,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:30,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-16 03:12:30,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-10-16 03:12:30,901 INFO L87 Difference]: Start difference. First operand 2060 states and 5747 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:31,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:31,281 INFO L93 Difference]: Finished difference Result 2248 states and 6166 transitions. [2021-10-16 03:12:31,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-16 03:12:31,281 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:31,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:31,285 INFO L225 Difference]: With dead ends: 2248 [2021-10-16 03:12:31,285 INFO L226 Difference]: Without dead ends: 2216 [2021-10-16 03:12:31,285 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 189.8ms TimeCoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-10-16 03:12:31,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2216 states. [2021-10-16 03:12:31,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2216 to 2052. [2021-10-16 03:12:31,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2052 states, 2051 states have (on average 2.794246708922477) internal successors, (5731), 2051 states have internal predecessors, (5731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:31,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 5731 transitions. [2021-10-16 03:12:31,322 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 5731 transitions. Word has length 38 [2021-10-16 03:12:31,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:31,323 INFO L470 AbstractCegarLoop]: Abstraction has 2052 states and 5731 transitions. [2021-10-16 03:12:31,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:31,323 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 5731 transitions. [2021-10-16 03:12:31,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:31,326 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:31,326 INFO L512 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] [2021-10-16 03:12:31,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2021-10-16 03:12:31,327 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:31,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:31,327 INFO L82 PathProgramCache]: Analyzing trace with hash 2097110799, now seen corresponding path program 192 times [2021-10-16 03:12:31,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:31,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067317236] [2021-10-16 03:12:31,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:31,328 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:31,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:31,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:31,409 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:31,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067317236] [2021-10-16 03:12:31,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067317236] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:31,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:31,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-16 03:12:31,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757654824] [2021-10-16 03:12:31,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 03:12:31,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:31,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 03:12:31,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:12:31,410 INFO L87 Difference]: Start difference. First operand 2052 states and 5731 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:31,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:31,742 INFO L93 Difference]: Finished difference Result 2450 states and 6620 transitions. [2021-10-16 03:12:31,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-16 03:12:31,742 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:31,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:31,746 INFO L225 Difference]: With dead ends: 2450 [2021-10-16 03:12:31,746 INFO L226 Difference]: Without dead ends: 2442 [2021-10-16 03:12:31,747 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 129.6ms TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-10-16 03:12:31,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2021-10-16 03:12:31,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2058. [2021-10-16 03:12:31,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2058 states, 2057 states have (on average 2.7953330092367525) internal successors, (5750), 2057 states have internal predecessors, (5750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:31,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2058 states to 2058 states and 5750 transitions. [2021-10-16 03:12:31,785 INFO L78 Accepts]: Start accepts. Automaton has 2058 states and 5750 transitions. Word has length 38 [2021-10-16 03:12:31,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:31,785 INFO L470 AbstractCegarLoop]: Abstraction has 2058 states and 5750 transitions. [2021-10-16 03:12:31,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:31,785 INFO L276 IsEmpty]: Start isEmpty. Operand 2058 states and 5750 transitions. [2021-10-16 03:12:31,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:31,788 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:31,788 INFO L512 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] [2021-10-16 03:12:31,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2021-10-16 03:12:31,789 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:31,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:31,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1737511761, now seen corresponding path program 193 times [2021-10-16 03:12:31,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:31,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166930712] [2021-10-16 03:12:31,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:31,789 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:31,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:31,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:31,874 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:31,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166930712] [2021-10-16 03:12:31,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166930712] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:31,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:31,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:12:31,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539853150] [2021-10-16 03:12:31,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:12:31,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:31,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:12:31,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:12:31,875 INFO L87 Difference]: Start difference. First operand 2058 states and 5750 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:32,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:32,275 INFO L93 Difference]: Finished difference Result 2428 states and 6549 transitions. [2021-10-16 03:12:32,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-16 03:12:32,276 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:32,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:32,280 INFO L225 Difference]: With dead ends: 2428 [2021-10-16 03:12:32,280 INFO L226 Difference]: Without dead ends: 2392 [2021-10-16 03:12:32,280 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 149.0ms TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-10-16 03:12:32,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2392 states. [2021-10-16 03:12:32,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2392 to 2050. [2021-10-16 03:12:32,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2050 states, 2049 states have (on average 2.793557833089312) internal successors, (5724), 2049 states have internal predecessors, (5724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:32,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2050 states to 2050 states and 5724 transitions. [2021-10-16 03:12:32,317 INFO L78 Accepts]: Start accepts. Automaton has 2050 states and 5724 transitions. Word has length 38 [2021-10-16 03:12:32,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:32,317 INFO L470 AbstractCegarLoop]: Abstraction has 2050 states and 5724 transitions. [2021-10-16 03:12:32,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:32,318 INFO L276 IsEmpty]: Start isEmpty. Operand 2050 states and 5724 transitions. [2021-10-16 03:12:32,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:32,320 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:32,320 INFO L512 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] [2021-10-16 03:12:32,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2021-10-16 03:12:32,321 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:32,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:32,321 INFO L82 PathProgramCache]: Analyzing trace with hash -260571425, now seen corresponding path program 194 times [2021-10-16 03:12:32,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:32,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521145362] [2021-10-16 03:12:32,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:32,322 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:32,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:32,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:32,396 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:32,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521145362] [2021-10-16 03:12:32,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521145362] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:32,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:32,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-16 03:12:32,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982122029] [2021-10-16 03:12:32,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 03:12:32,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:32,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 03:12:32,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:12:32,397 INFO L87 Difference]: Start difference. First operand 2050 states and 5724 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:32,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:32,672 INFO L93 Difference]: Finished difference Result 2472 states and 6655 transitions. [2021-10-16 03:12:32,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-16 03:12:32,673 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:32,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:32,677 INFO L225 Difference]: With dead ends: 2472 [2021-10-16 03:12:32,677 INFO L226 Difference]: Without dead ends: 2464 [2021-10-16 03:12:32,677 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 111.6ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-10-16 03:12:32,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2464 states. [2021-10-16 03:12:32,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2464 to 2050. [2021-10-16 03:12:32,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2050 states, 2049 states have (on average 2.792581747193753) internal successors, (5722), 2049 states have internal predecessors, (5722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:32,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2050 states to 2050 states and 5722 transitions. [2021-10-16 03:12:32,713 INFO L78 Accepts]: Start accepts. Automaton has 2050 states and 5722 transitions. Word has length 38 [2021-10-16 03:12:32,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:32,713 INFO L470 AbstractCegarLoop]: Abstraction has 2050 states and 5722 transitions. [2021-10-16 03:12:32,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:32,714 INFO L276 IsEmpty]: Start isEmpty. Operand 2050 states and 5722 transitions. [2021-10-16 03:12:32,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:32,716 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:32,716 INFO L512 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] [2021-10-16 03:12:32,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2021-10-16 03:12:32,716 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:32,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:32,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1509192367, now seen corresponding path program 195 times [2021-10-16 03:12:32,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:32,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903366681] [2021-10-16 03:12:32,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:32,717 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:32,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:32,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:32,792 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:32,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903366681] [2021-10-16 03:12:32,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903366681] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:32,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:32,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:12:32,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715871650] [2021-10-16 03:12:32,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:12:32,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:32,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:12:32,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:12:32,794 INFO L87 Difference]: Start difference. First operand 2050 states and 5722 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:33,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:33,129 INFO L93 Difference]: Finished difference Result 2486 states and 6676 transitions. [2021-10-16 03:12:33,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-16 03:12:33,129 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:33,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:33,133 INFO L225 Difference]: With dead ends: 2486 [2021-10-16 03:12:33,133 INFO L226 Difference]: Without dead ends: 2478 [2021-10-16 03:12:33,134 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 138.6ms TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2021-10-16 03:12:33,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2478 states. [2021-10-16 03:12:33,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2478 to 2048. [2021-10-16 03:12:33,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2048 states, 2047 states have (on average 2.792867611138251) internal successors, (5717), 2047 states have internal predecessors, (5717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:33,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2048 states to 2048 states and 5717 transitions. [2021-10-16 03:12:33,172 INFO L78 Accepts]: Start accepts. Automaton has 2048 states and 5717 transitions. Word has length 38 [2021-10-16 03:12:33,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:33,173 INFO L470 AbstractCegarLoop]: Abstraction has 2048 states and 5717 transitions. [2021-10-16 03:12:33,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:33,173 INFO L276 IsEmpty]: Start isEmpty. Operand 2048 states and 5717 transitions. [2021-10-16 03:12:33,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:33,176 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:33,176 INFO L512 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] [2021-10-16 03:12:33,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2021-10-16 03:12:33,176 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:33,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:33,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1322188757, now seen corresponding path program 196 times [2021-10-16 03:12:33,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:33,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134923103] [2021-10-16 03:12:33,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:33,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:33,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:33,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:33,267 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:33,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134923103] [2021-10-16 03:12:33,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134923103] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:33,267 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:33,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:12:33,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341960834] [2021-10-16 03:12:33,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:12:33,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:33,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:12:33,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:12:33,268 INFO L87 Difference]: Start difference. First operand 2048 states and 5717 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:33,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:33,621 INFO L93 Difference]: Finished difference Result 2424 states and 6527 transitions. [2021-10-16 03:12:33,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-16 03:12:33,622 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:33,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:33,626 INFO L225 Difference]: With dead ends: 2424 [2021-10-16 03:12:33,626 INFO L226 Difference]: Without dead ends: 2390 [2021-10-16 03:12:33,626 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 145.5ms TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-10-16 03:12:33,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2390 states. [2021-10-16 03:12:33,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2390 to 2042. [2021-10-16 03:12:33,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2042 states, 2041 states have (on average 2.788829005389515) internal successors, (5692), 2041 states have internal predecessors, (5692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:33,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2042 states to 2042 states and 5692 transitions. [2021-10-16 03:12:33,660 INFO L78 Accepts]: Start accepts. Automaton has 2042 states and 5692 transitions. Word has length 38 [2021-10-16 03:12:33,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:33,660 INFO L470 AbstractCegarLoop]: Abstraction has 2042 states and 5692 transitions. [2021-10-16 03:12:33,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:33,660 INFO L276 IsEmpty]: Start isEmpty. Operand 2042 states and 5692 transitions. [2021-10-16 03:12:33,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:33,663 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:33,663 INFO L512 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] [2021-10-16 03:12:33,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2021-10-16 03:12:33,663 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:33,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:33,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1663359483, now seen corresponding path program 197 times [2021-10-16 03:12:33,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:33,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300631472] [2021-10-16 03:12:33,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:33,664 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:33,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:33,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:33,753 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:33,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300631472] [2021-10-16 03:12:33,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300631472] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:33,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:33,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:12:33,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947475467] [2021-10-16 03:12:33,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:12:33,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:33,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:12:33,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:12:33,754 INFO L87 Difference]: Start difference. First operand 2042 states and 5692 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:34,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:34,203 INFO L93 Difference]: Finished difference Result 2412 states and 6485 transitions. [2021-10-16 03:12:34,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-16 03:12:34,203 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:34,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:34,207 INFO L225 Difference]: With dead ends: 2412 [2021-10-16 03:12:34,207 INFO L226 Difference]: Without dead ends: 2388 [2021-10-16 03:12:34,208 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 188.9ms TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2021-10-16 03:12:34,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2388 states. [2021-10-16 03:12:34,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2388 to 2032. [2021-10-16 03:12:34,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2032 states, 2031 states have (on average 2.794190054160512) internal successors, (5675), 2031 states have internal predecessors, (5675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:34,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2032 states to 2032 states and 5675 transitions. [2021-10-16 03:12:34,245 INFO L78 Accepts]: Start accepts. Automaton has 2032 states and 5675 transitions. Word has length 38 [2021-10-16 03:12:34,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:34,245 INFO L470 AbstractCegarLoop]: Abstraction has 2032 states and 5675 transitions. [2021-10-16 03:12:34,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:34,245 INFO L276 IsEmpty]: Start isEmpty. Operand 2032 states and 5675 transitions. [2021-10-16 03:12:34,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:34,248 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:34,248 INFO L512 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] [2021-10-16 03:12:34,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2021-10-16 03:12:34,248 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:34,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:34,249 INFO L82 PathProgramCache]: Analyzing trace with hash 545486485, now seen corresponding path program 198 times [2021-10-16 03:12:34,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:34,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695830832] [2021-10-16 03:12:34,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:34,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:34,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:34,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:34,352 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:34,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695830832] [2021-10-16 03:12:34,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695830832] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:34,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:34,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-16 03:12:34,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115857743] [2021-10-16 03:12:34,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 03:12:34,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:34,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 03:12:34,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:12:34,354 INFO L87 Difference]: Start difference. First operand 2032 states and 5675 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:34,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:34,680 INFO L93 Difference]: Finished difference Result 2182 states and 5965 transitions. [2021-10-16 03:12:34,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-16 03:12:34,680 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:34,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:34,684 INFO L225 Difference]: With dead ends: 2182 [2021-10-16 03:12:34,684 INFO L226 Difference]: Without dead ends: 2088 [2021-10-16 03:12:34,685 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 160.8ms TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-10-16 03:12:34,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2088 states. [2021-10-16 03:12:34,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2088 to 2024. [2021-10-16 03:12:34,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 2.795353435491844) internal successors, (5655), 2023 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:34,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 5655 transitions. [2021-10-16 03:12:34,719 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 5655 transitions. Word has length 38 [2021-10-16 03:12:34,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:34,719 INFO L470 AbstractCegarLoop]: Abstraction has 2024 states and 5655 transitions. [2021-10-16 03:12:34,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:34,720 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 5655 transitions. [2021-10-16 03:12:34,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:34,723 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:34,723 INFO L512 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] [2021-10-16 03:12:34,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2021-10-16 03:12:34,723 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:34,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:34,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1730681199, now seen corresponding path program 199 times [2021-10-16 03:12:34,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:34,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31086493] [2021-10-16 03:12:34,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:34,724 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:34,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:34,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:34,844 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:34,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31086493] [2021-10-16 03:12:34,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31086493] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:34,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:34,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:12:34,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140468264] [2021-10-16 03:12:34,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:12:34,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:34,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:12:34,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:12:34,845 INFO L87 Difference]: Start difference. First operand 2024 states and 5655 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:35,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:35,349 INFO L93 Difference]: Finished difference Result 2138 states and 5876 transitions. [2021-10-16 03:12:35,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-16 03:12:35,350 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:35,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:35,354 INFO L225 Difference]: With dead ends: 2138 [2021-10-16 03:12:35,354 INFO L226 Difference]: Without dead ends: 2122 [2021-10-16 03:12:35,354 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 259.6ms TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2021-10-16 03:12:35,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2021-10-16 03:12:35,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 2022. [2021-10-16 03:12:35,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2022 states, 2021 states have (on average 2.7956457199406235) internal successors, (5650), 2021 states have internal predecessors, (5650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:35,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2022 states to 2022 states and 5650 transitions. [2021-10-16 03:12:35,388 INFO L78 Accepts]: Start accepts. Automaton has 2022 states and 5650 transitions. Word has length 38 [2021-10-16 03:12:35,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:35,388 INFO L470 AbstractCegarLoop]: Abstraction has 2022 states and 5650 transitions. [2021-10-16 03:12:35,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:35,388 INFO L276 IsEmpty]: Start isEmpty. Operand 2022 states and 5650 transitions. [2021-10-16 03:12:35,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:35,391 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:35,391 INFO L512 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] [2021-10-16 03:12:35,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2021-10-16 03:12:35,391 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:35,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:35,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1506201147, now seen corresponding path program 200 times [2021-10-16 03:12:35,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:35,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927823614] [2021-10-16 03:12:35,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:35,392 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:35,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:35,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:35,518 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:35,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927823614] [2021-10-16 03:12:35,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927823614] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:35,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:35,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-16 03:12:35,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849032928] [2021-10-16 03:12:35,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-16 03:12:35,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:35,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-16 03:12:35,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-10-16 03:12:35,520 INFO L87 Difference]: Start difference. First operand 2022 states and 5650 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:36,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:36,000 INFO L93 Difference]: Finished difference Result 2180 states and 5960 transitions. [2021-10-16 03:12:36,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-16 03:12:36,001 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:36,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:36,005 INFO L225 Difference]: With dead ends: 2180 [2021-10-16 03:12:36,005 INFO L226 Difference]: Without dead ends: 2154 [2021-10-16 03:12:36,006 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 209.0ms TimeCoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2021-10-16 03:12:36,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2154 states. [2021-10-16 03:12:36,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2154 to 2018. [2021-10-16 03:12:36,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 2017 states have (on average 2.797223599405057) internal successors, (5642), 2017 states have internal predecessors, (5642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:36,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 5642 transitions. [2021-10-16 03:12:36,040 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 5642 transitions. Word has length 38 [2021-10-16 03:12:36,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:36,040 INFO L470 AbstractCegarLoop]: Abstraction has 2018 states and 5642 transitions. [2021-10-16 03:12:36,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:36,041 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 5642 transitions. [2021-10-16 03:12:36,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:36,043 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:36,043 INFO L512 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] [2021-10-16 03:12:36,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2021-10-16 03:12:36,044 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:36,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:36,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1390755681, now seen corresponding path program 201 times [2021-10-16 03:12:36,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:36,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403963863] [2021-10-16 03:12:36,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:36,044 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:36,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:36,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:36,124 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:36,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403963863] [2021-10-16 03:12:36,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403963863] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:36,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:36,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-16 03:12:36,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191101669] [2021-10-16 03:12:36,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 03:12:36,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:36,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 03:12:36,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:12:36,125 INFO L87 Difference]: Start difference. First operand 2018 states and 5642 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:36,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:36,401 INFO L93 Difference]: Finished difference Result 1930 states and 5399 transitions. [2021-10-16 03:12:36,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-16 03:12:36,402 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:36,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:36,405 INFO L225 Difference]: With dead ends: 1930 [2021-10-16 03:12:36,405 INFO L226 Difference]: Without dead ends: 1798 [2021-10-16 03:12:36,406 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 103.3ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-10-16 03:12:36,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1798 states. [2021-10-16 03:12:36,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1798 to 1736. [2021-10-16 03:12:36,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1736 states, 1735 states have (on average 2.8697406340057636) internal successors, (4979), 1735 states have internal predecessors, (4979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:36,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 4979 transitions. [2021-10-16 03:12:36,437 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 4979 transitions. Word has length 38 [2021-10-16 03:12:36,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:36,437 INFO L470 AbstractCegarLoop]: Abstraction has 1736 states and 4979 transitions. [2021-10-16 03:12:36,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:36,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 4979 transitions. [2021-10-16 03:12:36,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:36,439 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:36,440 INFO L512 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] [2021-10-16 03:12:36,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2021-10-16 03:12:36,440 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:36,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:36,440 INFO L82 PathProgramCache]: Analyzing trace with hash -898426641, now seen corresponding path program 202 times [2021-10-16 03:12:36,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:36,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020623896] [2021-10-16 03:12:36,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:36,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:36,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:36,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:36,544 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:36,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020623896] [2021-10-16 03:12:36,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020623896] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:36,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:36,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:12:36,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494141193] [2021-10-16 03:12:36,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:12:36,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:36,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:12:36,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:12:36,545 INFO L87 Difference]: Start difference. First operand 1736 states and 4979 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:36,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:36,924 INFO L93 Difference]: Finished difference Result 1798 states and 5090 transitions. [2021-10-16 03:12:36,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-16 03:12:36,924 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:36,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:36,928 INFO L225 Difference]: With dead ends: 1798 [2021-10-16 03:12:36,928 INFO L226 Difference]: Without dead ends: 1786 [2021-10-16 03:12:36,928 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 147.5ms TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2021-10-16 03:12:36,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-10-16 03:12:36,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1736. [2021-10-16 03:12:36,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1736 states, 1735 states have (on average 2.8662824207492794) internal successors, (4973), 1735 states have internal predecessors, (4973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:36,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 4973 transitions. [2021-10-16 03:12:36,959 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 4973 transitions. Word has length 38 [2021-10-16 03:12:36,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:36,960 INFO L470 AbstractCegarLoop]: Abstraction has 1736 states and 4973 transitions. [2021-10-16 03:12:36,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:36,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 4973 transitions. [2021-10-16 03:12:36,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:36,962 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:36,963 INFO L512 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] [2021-10-16 03:12:36,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2021-10-16 03:12:36,963 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:36,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:36,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1063027391, now seen corresponding path program 203 times [2021-10-16 03:12:36,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:36,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391621630] [2021-10-16 03:12:36,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:36,963 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:36,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:37,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:37,065 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:37,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391621630] [2021-10-16 03:12:37,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391621630] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:37,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:37,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-16 03:12:37,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326951630] [2021-10-16 03:12:37,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 03:12:37,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:37,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 03:12:37,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:12:37,066 INFO L87 Difference]: Start difference. First operand 1736 states and 4973 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:37,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:37,509 INFO L93 Difference]: Finished difference Result 2064 states and 5699 transitions. [2021-10-16 03:12:37,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-16 03:12:37,510 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:37,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:37,514 INFO L225 Difference]: With dead ends: 2064 [2021-10-16 03:12:37,514 INFO L226 Difference]: Without dead ends: 2056 [2021-10-16 03:12:37,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 164.0ms TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-10-16 03:12:37,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2056 states. [2021-10-16 03:12:37,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2056 to 1732. [2021-10-16 03:12:37,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1732 states, 1731 states have (on average 2.8671288272674755) internal successors, (4963), 1731 states have internal predecessors, (4963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:37,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 4963 transitions. [2021-10-16 03:12:37,550 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 4963 transitions. Word has length 38 [2021-10-16 03:12:37,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:37,550 INFO L470 AbstractCegarLoop]: Abstraction has 1732 states and 4963 transitions. [2021-10-16 03:12:37,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:37,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 4963 transitions. [2021-10-16 03:12:37,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:37,553 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:37,553 INFO L512 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] [2021-10-16 03:12:37,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2021-10-16 03:12:37,553 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:37,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:37,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1462176113, now seen corresponding path program 204 times [2021-10-16 03:12:37,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:37,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338928064] [2021-10-16 03:12:37,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:37,554 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:37,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:37,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:37,656 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:37,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338928064] [2021-10-16 03:12:37,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338928064] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:37,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:37,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:12:37,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155008114] [2021-10-16 03:12:37,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:12:37,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:37,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:12:37,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:12:37,658 INFO L87 Difference]: Start difference. First operand 1732 states and 4963 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:38,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:38,189 INFO L93 Difference]: Finished difference Result 2100 states and 5769 transitions. [2021-10-16 03:12:38,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-16 03:12:38,189 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:38,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:38,193 INFO L225 Difference]: With dead ends: 2100 [2021-10-16 03:12:38,193 INFO L226 Difference]: Without dead ends: 2086 [2021-10-16 03:12:38,193 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 197.7ms TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-10-16 03:12:38,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2021-10-16 03:12:38,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 1724. [2021-10-16 03:12:38,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1724 states, 1723 states have (on average 2.8723157283807312) internal successors, (4949), 1723 states have internal predecessors, (4949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:38,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 4949 transitions. [2021-10-16 03:12:38,226 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 4949 transitions. Word has length 38 [2021-10-16 03:12:38,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:38,226 INFO L470 AbstractCegarLoop]: Abstraction has 1724 states and 4949 transitions. [2021-10-16 03:12:38,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:38,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 4949 transitions. [2021-10-16 03:12:38,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:38,229 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:38,229 INFO L512 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] [2021-10-16 03:12:38,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2021-10-16 03:12:38,229 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:38,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:38,229 INFO L82 PathProgramCache]: Analyzing trace with hash 269602841, now seen corresponding path program 205 times [2021-10-16 03:12:38,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:38,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484745683] [2021-10-16 03:12:38,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:38,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:38,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:38,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:38,328 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:38,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484745683] [2021-10-16 03:12:38,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484745683] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:38,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:38,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:12:38,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638156332] [2021-10-16 03:12:38,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:12:38,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:38,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:12:38,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:12:38,329 INFO L87 Difference]: Start difference. First operand 1724 states and 4949 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:38,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:38,738 INFO L93 Difference]: Finished difference Result 1786 states and 5060 transitions. [2021-10-16 03:12:38,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-16 03:12:38,738 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:38,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:38,742 INFO L225 Difference]: With dead ends: 1786 [2021-10-16 03:12:38,742 INFO L226 Difference]: Without dead ends: 1770 [2021-10-16 03:12:38,742 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 192.5ms TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2021-10-16 03:12:38,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1770 states. [2021-10-16 03:12:38,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1770 to 1722. [2021-10-16 03:12:38,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1722 states, 1721 states have (on average 2.872748402091807) internal successors, (4944), 1721 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:38,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1722 states to 1722 states and 4944 transitions. [2021-10-16 03:12:38,773 INFO L78 Accepts]: Start accepts. Automaton has 1722 states and 4944 transitions. Word has length 38 [2021-10-16 03:12:38,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:38,773 INFO L470 AbstractCegarLoop]: Abstraction has 1722 states and 4944 transitions. [2021-10-16 03:12:38,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:38,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1722 states and 4944 transitions. [2021-10-16 03:12:38,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:38,776 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:38,776 INFO L512 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] [2021-10-16 03:12:38,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2021-10-16 03:12:38,776 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:38,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:38,777 INFO L82 PathProgramCache]: Analyzing trace with hash -936201083, now seen corresponding path program 206 times [2021-10-16 03:12:38,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:38,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770011035] [2021-10-16 03:12:38,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:38,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:38,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:38,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:38,874 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:38,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770011035] [2021-10-16 03:12:38,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770011035] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:38,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:38,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:12:38,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244019214] [2021-10-16 03:12:38,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:12:38,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:38,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:12:38,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:12:38,875 INFO L87 Difference]: Start difference. First operand 1722 states and 4944 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:39,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:39,277 INFO L93 Difference]: Finished difference Result 1802 states and 5082 transitions. [2021-10-16 03:12:39,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-16 03:12:39,277 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:39,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:39,281 INFO L225 Difference]: With dead ends: 1802 [2021-10-16 03:12:39,281 INFO L226 Difference]: Without dead ends: 1776 [2021-10-16 03:12:39,281 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 176.2ms TimeCoverageRelationStatistics Valid=151, Invalid=401, Unknown=0, NotChecked=0, Total=552 [2021-10-16 03:12:39,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1776 states. [2021-10-16 03:12:39,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1776 to 1716. [2021-10-16 03:12:39,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 1715 states have (on average 2.871720116618076) internal successors, (4925), 1715 states have internal predecessors, (4925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:39,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 4925 transitions. [2021-10-16 03:12:39,314 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 4925 transitions. Word has length 38 [2021-10-16 03:12:39,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:39,314 INFO L470 AbstractCegarLoop]: Abstraction has 1716 states and 4925 transitions. [2021-10-16 03:12:39,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:39,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 4925 transitions. [2021-10-16 03:12:39,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:39,317 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:39,317 INFO L512 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] [2021-10-16 03:12:39,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2021-10-16 03:12:39,318 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:39,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:39,318 INFO L82 PathProgramCache]: Analyzing trace with hash 161795417, now seen corresponding path program 207 times [2021-10-16 03:12:39,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:39,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127103081] [2021-10-16 03:12:39,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:39,318 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:39,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:39,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:39,414 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:39,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127103081] [2021-10-16 03:12:39,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127103081] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:39,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:39,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:12:39,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130708215] [2021-10-16 03:12:39,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:12:39,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:39,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:12:39,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:12:39,415 INFO L87 Difference]: Start difference. First operand 1716 states and 4925 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:39,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:39,783 INFO L93 Difference]: Finished difference Result 1822 states and 5133 transitions. [2021-10-16 03:12:39,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-16 03:12:39,784 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:39,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:39,787 INFO L225 Difference]: With dead ends: 1822 [2021-10-16 03:12:39,787 INFO L226 Difference]: Without dead ends: 1802 [2021-10-16 03:12:39,788 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 160.0ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-10-16 03:12:39,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2021-10-16 03:12:39,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1716. [2021-10-16 03:12:39,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 1715 states have (on average 2.868221574344023) internal successors, (4919), 1715 states have internal predecessors, (4919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:39,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 4919 transitions. [2021-10-16 03:12:39,820 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 4919 transitions. Word has length 38 [2021-10-16 03:12:39,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:39,821 INFO L470 AbstractCegarLoop]: Abstraction has 1716 states and 4919 transitions. [2021-10-16 03:12:39,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:39,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 4919 transitions. [2021-10-16 03:12:39,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:39,824 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:39,824 INFO L512 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] [2021-10-16 03:12:39,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2021-10-16 03:12:39,824 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:39,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:39,824 INFO L82 PathProgramCache]: Analyzing trace with hash 447545503, now seen corresponding path program 208 times [2021-10-16 03:12:39,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:39,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847839839] [2021-10-16 03:12:39,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:39,825 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:39,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:39,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:39,930 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:39,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847839839] [2021-10-16 03:12:39,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847839839] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:39,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:39,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:12:39,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393298027] [2021-10-16 03:12:39,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:12:39,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:39,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:12:39,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:12:39,932 INFO L87 Difference]: Start difference. First operand 1716 states and 4919 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:40,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:40,404 INFO L93 Difference]: Finished difference Result 2034 states and 5630 transitions. [2021-10-16 03:12:40,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-16 03:12:40,404 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:40,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:40,407 INFO L225 Difference]: With dead ends: 2034 [2021-10-16 03:12:40,407 INFO L226 Difference]: Without dead ends: 2016 [2021-10-16 03:12:40,407 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 178.8ms TimeCoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2021-10-16 03:12:40,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2016 states. [2021-10-16 03:12:40,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2016 to 1710. [2021-10-16 03:12:40,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1710 states, 1709 states have (on average 2.8695143358689292) internal successors, (4904), 1709 states have internal predecessors, (4904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:40,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 4904 transitions. [2021-10-16 03:12:40,436 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 4904 transitions. Word has length 38 [2021-10-16 03:12:40,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:40,436 INFO L470 AbstractCegarLoop]: Abstraction has 1710 states and 4904 transitions. [2021-10-16 03:12:40,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:40,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 4904 transitions. [2021-10-16 03:12:40,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:40,438 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:40,438 INFO L512 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] [2021-10-16 03:12:40,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208 [2021-10-16 03:12:40,439 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:40,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:40,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1756964559, now seen corresponding path program 209 times [2021-10-16 03:12:40,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:40,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948225297] [2021-10-16 03:12:40,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:40,440 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:40,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:40,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:40,553 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:40,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948225297] [2021-10-16 03:12:40,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948225297] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:40,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:40,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:12:40,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471194798] [2021-10-16 03:12:40,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:12:40,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:40,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:12:40,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:12:40,554 INFO L87 Difference]: Start difference. First operand 1710 states and 4904 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:41,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:41,108 INFO L93 Difference]: Finished difference Result 2072 states and 5703 transitions. [2021-10-16 03:12:41,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-16 03:12:41,109 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:41,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:41,112 INFO L225 Difference]: With dead ends: 2072 [2021-10-16 03:12:41,112 INFO L226 Difference]: Without dead ends: 2050 [2021-10-16 03:12:41,113 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 213.5ms TimeCoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2021-10-16 03:12:41,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2050 states. [2021-10-16 03:12:41,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2050 to 1702. [2021-10-16 03:12:41,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1702 states, 1701 states have (on average 2.874779541446208) internal successors, (4890), 1701 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:41,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 4890 transitions. [2021-10-16 03:12:41,143 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 4890 transitions. Word has length 38 [2021-10-16 03:12:41,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:41,143 INFO L470 AbstractCegarLoop]: Abstraction has 1702 states and 4890 transitions. [2021-10-16 03:12:41,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:41,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 4890 transitions. [2021-10-16 03:12:41,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:41,145 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:41,145 INFO L512 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] [2021-10-16 03:12:41,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209 [2021-10-16 03:12:41,146 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:41,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:41,146 INFO L82 PathProgramCache]: Analyzing trace with hash -231417127, now seen corresponding path program 210 times [2021-10-16 03:12:41,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:41,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310933350] [2021-10-16 03:12:41,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:41,146 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:41,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:41,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:41,268 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:41,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310933350] [2021-10-16 03:12:41,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310933350] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:41,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:41,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-16 03:12:41,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862874139] [2021-10-16 03:12:41,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-16 03:12:41,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:41,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-16 03:12:41,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-10-16 03:12:41,269 INFO L87 Difference]: Start difference. First operand 1702 states and 4890 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:41,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:41,779 INFO L93 Difference]: Finished difference Result 1808 states and 5098 transitions. [2021-10-16 03:12:41,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-16 03:12:41,779 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:41,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:41,782 INFO L225 Difference]: With dead ends: 1808 [2021-10-16 03:12:41,783 INFO L226 Difference]: Without dead ends: 1784 [2021-10-16 03:12:41,783 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 219.2ms TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2021-10-16 03:12:41,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-10-16 03:12:41,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1700. [2021-10-16 03:12:41,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1700 states, 1699 states have (on average 2.8752207180694525) internal successors, (4885), 1699 states have internal predecessors, (4885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:41,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 4885 transitions. [2021-10-16 03:12:41,815 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 4885 transitions. Word has length 38 [2021-10-16 03:12:41,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:41,815 INFO L470 AbstractCegarLoop]: Abstraction has 1700 states and 4885 transitions. [2021-10-16 03:12:41,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:41,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 4885 transitions. [2021-10-16 03:12:41,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:41,818 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:41,818 INFO L512 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] [2021-10-16 03:12:41,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210 [2021-10-16 03:12:41,818 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:41,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:41,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1799661295, now seen corresponding path program 211 times [2021-10-16 03:12:41,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:41,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549772493] [2021-10-16 03:12:41,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:41,819 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:41,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:41,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:41,938 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:41,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549772493] [2021-10-16 03:12:41,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549772493] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:41,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:41,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-16 03:12:41,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312425476] [2021-10-16 03:12:41,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-16 03:12:41,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:41,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-16 03:12:41,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-10-16 03:12:41,939 INFO L87 Difference]: Start difference. First operand 1700 states and 4885 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:42,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:42,395 INFO L93 Difference]: Finished difference Result 1814 states and 5101 transitions. [2021-10-16 03:12:42,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-16 03:12:42,395 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:42,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:42,398 INFO L225 Difference]: With dead ends: 1814 [2021-10-16 03:12:42,398 INFO L226 Difference]: Without dead ends: 1756 [2021-10-16 03:12:42,399 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 190.8ms TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2021-10-16 03:12:42,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2021-10-16 03:12:42,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1642. [2021-10-16 03:12:42,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1641 states have (on average 2.9092017062766606) internal successors, (4774), 1641 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:42,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 4774 transitions. [2021-10-16 03:12:42,429 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 4774 transitions. Word has length 38 [2021-10-16 03:12:42,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:42,429 INFO L470 AbstractCegarLoop]: Abstraction has 1642 states and 4774 transitions. [2021-10-16 03:12:42,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:42,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 4774 transitions. [2021-10-16 03:12:42,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:42,432 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:42,432 INFO L512 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] [2021-10-16 03:12:42,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211 [2021-10-16 03:12:42,432 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:42,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:42,432 INFO L82 PathProgramCache]: Analyzing trace with hash 640794507, now seen corresponding path program 212 times [2021-10-16 03:12:42,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:42,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020998026] [2021-10-16 03:12:42,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:42,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:42,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:42,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:42,600 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:42,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020998026] [2021-10-16 03:12:42,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020998026] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:42,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:42,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-16 03:12:42,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920495086] [2021-10-16 03:12:42,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 03:12:42,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:42,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 03:12:42,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-16 03:12:42,602 INFO L87 Difference]: Start difference. First operand 1642 states and 4774 transitions. Second operand has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:42,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:42,781 INFO L93 Difference]: Finished difference Result 1831 states and 5216 transitions. [2021-10-16 03:12:42,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 03:12:42,782 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:42,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:42,785 INFO L225 Difference]: With dead ends: 1831 [2021-10-16 03:12:42,785 INFO L226 Difference]: Without dead ends: 1440 [2021-10-16 03:12:42,785 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 98.7ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:12:42,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2021-10-16 03:12:42,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 1440. [2021-10-16 03:12:42,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1439 states have (on average 2.963863794301598) internal successors, (4265), 1439 states have internal predecessors, (4265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:42,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 4265 transitions. [2021-10-16 03:12:42,811 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 4265 transitions. Word has length 38 [2021-10-16 03:12:42,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:42,812 INFO L470 AbstractCegarLoop]: Abstraction has 1440 states and 4265 transitions. [2021-10-16 03:12:42,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:42,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 4265 transitions. [2021-10-16 03:12:42,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:42,814 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:42,814 INFO L512 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] [2021-10-16 03:12:42,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212 [2021-10-16 03:12:42,814 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:42,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:42,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1871808187, now seen corresponding path program 213 times [2021-10-16 03:12:42,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:42,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290788477] [2021-10-16 03:12:42,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:42,816 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:42,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:42,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:42,930 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:42,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290788477] [2021-10-16 03:12:42,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290788477] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:42,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:42,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:12:42,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437778638] [2021-10-16 03:12:42,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:12:42,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:42,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:12:42,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:12:42,932 INFO L87 Difference]: Start difference. First operand 1440 states and 4265 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:43,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:43,264 INFO L93 Difference]: Finished difference Result 1480 states and 4323 transitions. [2021-10-16 03:12:43,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-16 03:12:43,265 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:43,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:43,268 INFO L225 Difference]: With dead ends: 1480 [2021-10-16 03:12:43,268 INFO L226 Difference]: Without dead ends: 1460 [2021-10-16 03:12:43,268 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 138.9ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-10-16 03:12:43,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2021-10-16 03:12:43,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1440. [2021-10-16 03:12:43,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1439 states have (on average 2.9596942321056288) internal successors, (4259), 1439 states have internal predecessors, (4259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:43,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 4259 transitions. [2021-10-16 03:12:43,293 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 4259 transitions. Word has length 38 [2021-10-16 03:12:43,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:43,293 INFO L470 AbstractCegarLoop]: Abstraction has 1440 states and 4259 transitions. [2021-10-16 03:12:43,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:43,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 4259 transitions. [2021-10-16 03:12:43,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:43,296 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:43,296 INFO L512 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] [2021-10-16 03:12:43,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213 [2021-10-16 03:12:43,296 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:43,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:43,296 INFO L82 PathProgramCache]: Analyzing trace with hash 459053497, now seen corresponding path program 214 times [2021-10-16 03:12:43,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:43,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161778215] [2021-10-16 03:12:43,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:43,297 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:43,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:43,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:43,381 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:43,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161778215] [2021-10-16 03:12:43,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161778215] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:43,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:43,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-16 03:12:43,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123336064] [2021-10-16 03:12:43,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 03:12:43,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:43,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 03:12:43,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:12:43,382 INFO L87 Difference]: Start difference. First operand 1440 states and 4259 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:43,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:43,697 INFO L93 Difference]: Finished difference Result 1594 states and 4566 transitions. [2021-10-16 03:12:43,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-16 03:12:43,698 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:43,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:43,701 INFO L225 Difference]: With dead ends: 1594 [2021-10-16 03:12:43,701 INFO L226 Difference]: Without dead ends: 1586 [2021-10-16 03:12:43,701 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 132.1ms TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-10-16 03:12:43,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2021-10-16 03:12:43,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 1442. [2021-10-16 03:12:43,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 2.959056210964608) internal successors, (4264), 1441 states have internal predecessors, (4264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:43,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4264 transitions. [2021-10-16 03:12:43,726 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4264 transitions. Word has length 38 [2021-10-16 03:12:43,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:43,727 INFO L470 AbstractCegarLoop]: Abstraction has 1442 states and 4264 transitions. [2021-10-16 03:12:43,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:43,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4264 transitions. [2021-10-16 03:12:43,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:43,729 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:43,729 INFO L512 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] [2021-10-16 03:12:43,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214 [2021-10-16 03:12:43,729 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:43,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:43,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1635656113, now seen corresponding path program 215 times [2021-10-16 03:12:43,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:43,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635920542] [2021-10-16 03:12:43,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:43,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:43,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:43,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:43,856 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:43,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635920542] [2021-10-16 03:12:43,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635920542] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:43,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:43,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:12:43,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043400307] [2021-10-16 03:12:43,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:12:43,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:43,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:12:43,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:12:43,857 INFO L87 Difference]: Start difference. First operand 1442 states and 4264 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:44,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:44,235 INFO L93 Difference]: Finished difference Result 1592 states and 4559 transitions. [2021-10-16 03:12:44,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-16 03:12:44,236 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:44,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:44,239 INFO L225 Difference]: With dead ends: 1592 [2021-10-16 03:12:44,239 INFO L226 Difference]: Without dead ends: 1584 [2021-10-16 03:12:44,239 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 169.6ms TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2021-10-16 03:12:44,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1584 states. [2021-10-16 03:12:44,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1584 to 1448. [2021-10-16 03:12:44,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 1447 states have (on average 2.955770559778853) internal successors, (4277), 1447 states have internal predecessors, (4277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:44,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 4277 transitions. [2021-10-16 03:12:44,265 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 4277 transitions. Word has length 38 [2021-10-16 03:12:44,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:44,265 INFO L470 AbstractCegarLoop]: Abstraction has 1448 states and 4277 transitions. [2021-10-16 03:12:44,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:44,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 4277 transitions. [2021-10-16 03:12:44,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:44,267 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:44,267 INFO L512 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] [2021-10-16 03:12:44,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215 [2021-10-16 03:12:44,268 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:44,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:44,268 INFO L82 PathProgramCache]: Analyzing trace with hash 296545461, now seen corresponding path program 216 times [2021-10-16 03:12:44,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:44,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345303863] [2021-10-16 03:12:44,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:44,268 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:44,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:44,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:44,393 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:44,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345303863] [2021-10-16 03:12:44,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345303863] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:44,394 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:44,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:12:44,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677587605] [2021-10-16 03:12:44,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:12:44,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:44,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:12:44,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:12:44,395 INFO L87 Difference]: Start difference. First operand 1448 states and 4277 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:44,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:44,715 INFO L93 Difference]: Finished difference Result 1534 states and 4434 transitions. [2021-10-16 03:12:44,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-16 03:12:44,716 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:44,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:44,720 INFO L225 Difference]: With dead ends: 1534 [2021-10-16 03:12:44,720 INFO L226 Difference]: Without dead ends: 1516 [2021-10-16 03:12:44,721 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 134.1ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-10-16 03:12:44,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2021-10-16 03:12:44,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1442. [2021-10-16 03:12:44,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 2.9576682859125607) internal successors, (4262), 1441 states have internal predecessors, (4262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:44,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4262 transitions. [2021-10-16 03:12:44,759 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4262 transitions. Word has length 38 [2021-10-16 03:12:44,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:44,759 INFO L470 AbstractCegarLoop]: Abstraction has 1442 states and 4262 transitions. [2021-10-16 03:12:44,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:44,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4262 transitions. [2021-10-16 03:12:44,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:44,763 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:44,763 INFO L512 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] [2021-10-16 03:12:44,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216 [2021-10-16 03:12:44,764 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:44,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:44,764 INFO L82 PathProgramCache]: Analyzing trace with hash -963668901, now seen corresponding path program 217 times [2021-10-16 03:12:44,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:44,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415746824] [2021-10-16 03:12:44,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:44,765 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:44,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:44,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:44,889 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:44,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415746824] [2021-10-16 03:12:44,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415746824] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:44,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:44,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:12:44,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562161366] [2021-10-16 03:12:44,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:12:44,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:44,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:12:44,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:12:44,891 INFO L87 Difference]: Start difference. First operand 1442 states and 4262 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:45,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:45,310 INFO L93 Difference]: Finished difference Result 1508 states and 4381 transitions. [2021-10-16 03:12:45,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-16 03:12:45,310 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:45,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:45,313 INFO L225 Difference]: With dead ends: 1508 [2021-10-16 03:12:45,313 INFO L226 Difference]: Without dead ends: 1486 [2021-10-16 03:12:45,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 186.8ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-10-16 03:12:45,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2021-10-16 03:12:45,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 1434. [2021-10-16 03:12:45,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1434 states, 1433 states have (on average 2.961618981158409) internal successors, (4244), 1433 states have internal predecessors, (4244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:45,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 4244 transitions. [2021-10-16 03:12:45,341 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 4244 transitions. Word has length 38 [2021-10-16 03:12:45,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:45,341 INFO L470 AbstractCegarLoop]: Abstraction has 1434 states and 4244 transitions. [2021-10-16 03:12:45,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:45,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 4244 transitions. [2021-10-16 03:12:45,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:45,344 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:45,344 INFO L512 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] [2021-10-16 03:12:45,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217 [2021-10-16 03:12:45,344 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:45,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:45,344 INFO L82 PathProgramCache]: Analyzing trace with hash -50126625, now seen corresponding path program 218 times [2021-10-16 03:12:45,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:45,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628741362] [2021-10-16 03:12:45,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:45,345 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:45,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:45,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:45,442 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:45,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628741362] [2021-10-16 03:12:45,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628741362] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:45,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:45,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-16 03:12:45,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497694423] [2021-10-16 03:12:45,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-16 03:12:45,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:45,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-16 03:12:45,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-10-16 03:12:45,444 INFO L87 Difference]: Start difference. First operand 1434 states and 4244 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:45,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:45,860 INFO L93 Difference]: Finished difference Result 1508 states and 4382 transitions. [2021-10-16 03:12:45,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-16 03:12:45,860 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:45,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:45,863 INFO L225 Difference]: With dead ends: 1508 [2021-10-16 03:12:45,863 INFO L226 Difference]: Without dead ends: 1480 [2021-10-16 03:12:45,864 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 206.7ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-10-16 03:12:45,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-10-16 03:12:45,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1428. [2021-10-16 03:12:45,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 2.9635599159074983) internal successors, (4229), 1427 states have internal predecessors, (4229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:45,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 4229 transitions. [2021-10-16 03:12:45,887 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 4229 transitions. Word has length 38 [2021-10-16 03:12:45,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:45,887 INFO L470 AbstractCegarLoop]: Abstraction has 1428 states and 4229 transitions. [2021-10-16 03:12:45,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:45,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 4229 transitions. [2021-10-16 03:12:45,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:45,889 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:45,889 INFO L512 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] [2021-10-16 03:12:45,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218 [2021-10-16 03:12:45,889 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:45,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:45,890 INFO L82 PathProgramCache]: Analyzing trace with hash 141082295, now seen corresponding path program 219 times [2021-10-16 03:12:45,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:45,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548314617] [2021-10-16 03:12:45,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:45,890 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:45,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:46,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:46,013 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:46,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548314617] [2021-10-16 03:12:46,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548314617] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:46,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:46,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:12:46,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458761509] [2021-10-16 03:12:46,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:12:46,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:46,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:12:46,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:12:46,014 INFO L87 Difference]: Start difference. First operand 1428 states and 4229 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:46,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:46,445 INFO L93 Difference]: Finished difference Result 1536 states and 4443 transitions. [2021-10-16 03:12:46,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-16 03:12:46,446 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:46,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:46,449 INFO L225 Difference]: With dead ends: 1536 [2021-10-16 03:12:46,449 INFO L226 Difference]: Without dead ends: 1518 [2021-10-16 03:12:46,449 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 179.8ms TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-10-16 03:12:46,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2021-10-16 03:12:46,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 1430. [2021-10-16 03:12:46,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1430 states, 1429 states have (on average 2.9629111266620014) internal successors, (4234), 1429 states have internal predecessors, (4234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:46,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1430 states to 1430 states and 4234 transitions. [2021-10-16 03:12:46,473 INFO L78 Accepts]: Start accepts. Automaton has 1430 states and 4234 transitions. Word has length 38 [2021-10-16 03:12:46,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:46,473 INFO L470 AbstractCegarLoop]: Abstraction has 1430 states and 4234 transitions. [2021-10-16 03:12:46,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:46,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1430 states and 4234 transitions. [2021-10-16 03:12:46,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:46,475 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:46,475 INFO L512 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] [2021-10-16 03:12:46,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219 [2021-10-16 03:12:46,476 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:46,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:46,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1557200689, now seen corresponding path program 220 times [2021-10-16 03:12:46,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:46,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545217898] [2021-10-16 03:12:46,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:46,476 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:46,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:46,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:46,589 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:46,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545217898] [2021-10-16 03:12:46,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545217898] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:46,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:46,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:12:46,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473014181] [2021-10-16 03:12:46,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:12:46,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:46,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:12:46,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:12:46,590 INFO L87 Difference]: Start difference. First operand 1430 states and 4234 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:47,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:47,052 INFO L93 Difference]: Finished difference Result 1532 states and 4431 transitions. [2021-10-16 03:12:47,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-16 03:12:47,052 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:47,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:47,055 INFO L225 Difference]: With dead ends: 1532 [2021-10-16 03:12:47,055 INFO L226 Difference]: Without dead ends: 1516 [2021-10-16 03:12:47,055 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 202.9ms TimeCoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2021-10-16 03:12:47,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2021-10-16 03:12:47,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1436. [2021-10-16 03:12:47,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 2.959581881533101) internal successors, (4247), 1435 states have internal predecessors, (4247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:47,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 4247 transitions. [2021-10-16 03:12:47,080 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 4247 transitions. Word has length 38 [2021-10-16 03:12:47,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:47,080 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 4247 transitions. [2021-10-16 03:12:47,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:47,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 4247 transitions. [2021-10-16 03:12:47,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:47,083 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:47,083 INFO L512 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] [2021-10-16 03:12:47,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220 [2021-10-16 03:12:47,083 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:47,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:47,083 INFO L82 PathProgramCache]: Analyzing trace with hash -2115866663, now seen corresponding path program 221 times [2021-10-16 03:12:47,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:47,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443258233] [2021-10-16 03:12:47,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:47,084 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:47,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:47,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:47,204 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:47,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443258233] [2021-10-16 03:12:47,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443258233] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:47,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:47,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:12:47,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224696549] [2021-10-16 03:12:47,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:12:47,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:47,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:12:47,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:12:47,205 INFO L87 Difference]: Start difference. First operand 1436 states and 4247 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:47,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:47,691 INFO L93 Difference]: Finished difference Result 1544 states and 4456 transitions. [2021-10-16 03:12:47,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-16 03:12:47,691 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:47,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:47,694 INFO L225 Difference]: With dead ends: 1544 [2021-10-16 03:12:47,694 INFO L226 Difference]: Without dead ends: 1518 [2021-10-16 03:12:47,694 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 209.2ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-10-16 03:12:47,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2021-10-16 03:12:47,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 1430. [2021-10-16 03:12:47,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1430 states, 1429 states have (on average 2.9615115465360393) internal successors, (4232), 1429 states have internal predecessors, (4232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:47,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1430 states to 1430 states and 4232 transitions. [2021-10-16 03:12:47,718 INFO L78 Accepts]: Start accepts. Automaton has 1430 states and 4232 transitions. Word has length 38 [2021-10-16 03:12:47,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:47,719 INFO L470 AbstractCegarLoop]: Abstraction has 1430 states and 4232 transitions. [2021-10-16 03:12:47,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:47,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1430 states and 4232 transitions. [2021-10-16 03:12:47,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:47,721 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:47,721 INFO L512 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] [2021-10-16 03:12:47,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221 [2021-10-16 03:12:47,721 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:47,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:47,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1700675621, now seen corresponding path program 222 times [2021-10-16 03:12:47,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:47,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446174475] [2021-10-16 03:12:47,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:47,722 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:47,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:47,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:47,823 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:47,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446174475] [2021-10-16 03:12:47,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446174475] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:47,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:47,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-16 03:12:47,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494276422] [2021-10-16 03:12:47,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-16 03:12:47,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:47,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-16 03:12:47,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-10-16 03:12:47,824 INFO L87 Difference]: Start difference. First operand 1430 states and 4232 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:48,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:48,269 INFO L93 Difference]: Finished difference Result 1530 states and 4429 transitions. [2021-10-16 03:12:48,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-16 03:12:48,269 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:48,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:48,272 INFO L225 Difference]: With dead ends: 1530 [2021-10-16 03:12:48,272 INFO L226 Difference]: Without dead ends: 1500 [2021-10-16 03:12:48,272 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 228.1ms TimeCoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2021-10-16 03:12:48,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1500 states. [2021-10-16 03:12:48,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1500 to 1422. [2021-10-16 03:12:48,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1421 states have (on average 2.9655172413793105) internal successors, (4214), 1421 states have internal predecessors, (4214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:48,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 4214 transitions. [2021-10-16 03:12:48,298 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 4214 transitions. Word has length 38 [2021-10-16 03:12:48,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:48,298 INFO L470 AbstractCegarLoop]: Abstraction has 1422 states and 4214 transitions. [2021-10-16 03:12:48,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:48,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 4214 transitions. [2021-10-16 03:12:48,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:48,300 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:48,300 INFO L512 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] [2021-10-16 03:12:48,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222 [2021-10-16 03:12:48,300 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:48,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:48,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1110311841, now seen corresponding path program 223 times [2021-10-16 03:12:48,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:48,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43437530] [2021-10-16 03:12:48,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:48,301 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:48,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:48,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:48,409 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:48,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43437530] [2021-10-16 03:12:48,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43437530] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:48,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:48,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:12:48,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834510529] [2021-10-16 03:12:48,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:12:48,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:48,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:12:48,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:12:48,410 INFO L87 Difference]: Start difference. First operand 1422 states and 4214 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:48,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:48,772 INFO L93 Difference]: Finished difference Result 1596 states and 4589 transitions. [2021-10-16 03:12:48,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-16 03:12:48,773 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:48,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:48,776 INFO L225 Difference]: With dead ends: 1596 [2021-10-16 03:12:48,776 INFO L226 Difference]: Without dead ends: 1588 [2021-10-16 03:12:48,776 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 149.7ms TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-10-16 03:12:48,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2021-10-16 03:12:48,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 1438. [2021-10-16 03:12:48,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1438 states, 1437 states have (on average 2.9631176061238693) internal successors, (4258), 1437 states have internal predecessors, (4258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:48,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 4258 transitions. [2021-10-16 03:12:48,801 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 4258 transitions. Word has length 38 [2021-10-16 03:12:48,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:48,801 INFO L470 AbstractCegarLoop]: Abstraction has 1438 states and 4258 transitions. [2021-10-16 03:12:48,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:48,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 4258 transitions. [2021-10-16 03:12:48,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:48,803 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:48,804 INFO L512 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] [2021-10-16 03:12:48,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223 [2021-10-16 03:12:48,804 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:48,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:48,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1380555707, now seen corresponding path program 224 times [2021-10-16 03:12:48,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:48,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888222620] [2021-10-16 03:12:48,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:48,804 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:48,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:48,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:48,922 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:48,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888222620] [2021-10-16 03:12:48,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888222620] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:48,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:48,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:12:48,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253815005] [2021-10-16 03:12:48,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:12:48,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:48,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:12:48,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:12:48,923 INFO L87 Difference]: Start difference. First operand 1438 states and 4258 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:49,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:49,326 INFO L93 Difference]: Finished difference Result 1594 states and 4586 transitions. [2021-10-16 03:12:49,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-16 03:12:49,327 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:49,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:49,330 INFO L225 Difference]: With dead ends: 1594 [2021-10-16 03:12:49,330 INFO L226 Difference]: Without dead ends: 1576 [2021-10-16 03:12:49,330 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 176.3ms TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2021-10-16 03:12:49,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2021-10-16 03:12:49,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1442. [2021-10-16 03:12:49,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 2.960444136016655) internal successors, (4266), 1441 states have internal predecessors, (4266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:49,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4266 transitions. [2021-10-16 03:12:49,357 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4266 transitions. Word has length 38 [2021-10-16 03:12:49,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:49,357 INFO L470 AbstractCegarLoop]: Abstraction has 1442 states and 4266 transitions. [2021-10-16 03:12:49,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:49,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4266 transitions. [2021-10-16 03:12:49,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:49,360 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:49,360 INFO L512 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] [2021-10-16 03:12:49,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224 [2021-10-16 03:12:49,360 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:49,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:49,360 INFO L82 PathProgramCache]: Analyzing trace with hash 683113723, now seen corresponding path program 225 times [2021-10-16 03:12:49,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:49,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424694027] [2021-10-16 03:12:49,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:49,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:49,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:49,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:49,465 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:49,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424694027] [2021-10-16 03:12:49,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424694027] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:49,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:49,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-16 03:12:49,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717062583] [2021-10-16 03:12:49,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 03:12:49,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:49,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 03:12:49,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:12:49,466 INFO L87 Difference]: Start difference. First operand 1442 states and 4266 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:49,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:49,779 INFO L93 Difference]: Finished difference Result 1580 states and 4541 transitions. [2021-10-16 03:12:49,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-16 03:12:49,779 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:49,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:49,783 INFO L225 Difference]: With dead ends: 1580 [2021-10-16 03:12:49,783 INFO L226 Difference]: Without dead ends: 1562 [2021-10-16 03:12:49,783 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 118.7ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-10-16 03:12:49,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1562 states. [2021-10-16 03:12:49,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1562 to 1436. [2021-10-16 03:12:49,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 2.959581881533101) internal successors, (4247), 1435 states have internal predecessors, (4247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:49,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 4247 transitions. [2021-10-16 03:12:49,810 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 4247 transitions. Word has length 38 [2021-10-16 03:12:49,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:49,810 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 4247 transitions. [2021-10-16 03:12:49,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:49,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 4247 transitions. [2021-10-16 03:12:49,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:49,812 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:49,812 INFO L512 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] [2021-10-16 03:12:49,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225 [2021-10-16 03:12:49,813 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:49,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:49,813 INFO L82 PathProgramCache]: Analyzing trace with hash 590596383, now seen corresponding path program 226 times [2021-10-16 03:12:49,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:49,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241940270] [2021-10-16 03:12:49,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:49,813 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:49,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:49,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:49,927 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:49,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241940270] [2021-10-16 03:12:49,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241940270] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:49,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:49,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:12:49,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469924747] [2021-10-16 03:12:49,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:12:49,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:49,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:12:49,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:12:49,928 INFO L87 Difference]: Start difference. First operand 1436 states and 4247 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:50,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:50,345 INFO L93 Difference]: Finished difference Result 1606 states and 4599 transitions. [2021-10-16 03:12:50,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-16 03:12:50,346 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:50,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:50,349 INFO L225 Difference]: With dead ends: 1606 [2021-10-16 03:12:50,349 INFO L226 Difference]: Without dead ends: 1574 [2021-10-16 03:12:50,349 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 172.3ms TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-10-16 03:12:50,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1574 states. [2021-10-16 03:12:50,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1574 to 1424. [2021-10-16 03:12:50,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1424 states, 1423 states have (on average 2.964862965565706) internal successors, (4219), 1423 states have internal predecessors, (4219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:50,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 4219 transitions. [2021-10-16 03:12:50,375 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 4219 transitions. Word has length 38 [2021-10-16 03:12:50,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:50,375 INFO L470 AbstractCegarLoop]: Abstraction has 1424 states and 4219 transitions. [2021-10-16 03:12:50,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:50,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 4219 transitions. [2021-10-16 03:12:50,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:50,377 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:50,377 INFO L512 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] [2021-10-16 03:12:50,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226 [2021-10-16 03:12:50,378 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:50,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:50,378 INFO L82 PathProgramCache]: Analyzing trace with hash 831642173, now seen corresponding path program 227 times [2021-10-16 03:12:50,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:50,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653332058] [2021-10-16 03:12:50,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:50,378 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:50,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:50,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:50,456 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:50,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653332058] [2021-10-16 03:12:50,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653332058] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:50,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:50,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-16 03:12:50,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476778932] [2021-10-16 03:12:50,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 03:12:50,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:50,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 03:12:50,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:12:50,457 INFO L87 Difference]: Start difference. First operand 1424 states and 4219 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:50,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:50,763 INFO L93 Difference]: Finished difference Result 1618 states and 4636 transitions. [2021-10-16 03:12:50,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-16 03:12:50,764 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:50,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:50,767 INFO L225 Difference]: With dead ends: 1618 [2021-10-16 03:12:50,767 INFO L226 Difference]: Without dead ends: 1610 [2021-10-16 03:12:50,767 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 132.4ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-10-16 03:12:50,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2021-10-16 03:12:50,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 1426. [2021-10-16 03:12:50,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 2.9642105263157896) internal successors, (4224), 1425 states have internal predecessors, (4224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:50,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 4224 transitions. [2021-10-16 03:12:50,792 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 4224 transitions. Word has length 38 [2021-10-16 03:12:50,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:50,792 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 4224 transitions. [2021-10-16 03:12:50,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:50,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 4224 transitions. [2021-10-16 03:12:50,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:50,794 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:50,794 INFO L512 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] [2021-10-16 03:12:50,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227 [2021-10-16 03:12:50,795 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:50,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:50,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1263067437, now seen corresponding path program 228 times [2021-10-16 03:12:50,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:50,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222718362] [2021-10-16 03:12:50,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:50,795 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:50,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:50,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:50,886 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:50,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222718362] [2021-10-16 03:12:50,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222718362] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:50,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:50,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:12:50,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077855030] [2021-10-16 03:12:50,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:12:50,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:50,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:12:50,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:12:50,888 INFO L87 Difference]: Start difference. First operand 1426 states and 4224 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:51,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:51,251 INFO L93 Difference]: Finished difference Result 1616 states and 4629 transitions. [2021-10-16 03:12:51,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-16 03:12:51,251 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:51,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:51,254 INFO L225 Difference]: With dead ends: 1616 [2021-10-16 03:12:51,254 INFO L226 Difference]: Without dead ends: 1608 [2021-10-16 03:12:51,254 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 167.8ms TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-10-16 03:12:51,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2021-10-16 03:12:51,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1432. [2021-10-16 03:12:51,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1431 states have (on average 2.9608665269042627) internal successors, (4237), 1431 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:51,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 4237 transitions. [2021-10-16 03:12:51,280 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 4237 transitions. Word has length 38 [2021-10-16 03:12:51,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:51,281 INFO L470 AbstractCegarLoop]: Abstraction has 1432 states and 4237 transitions. [2021-10-16 03:12:51,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:51,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 4237 transitions. [2021-10-16 03:12:51,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:51,283 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:51,283 INFO L512 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] [2021-10-16 03:12:51,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228 [2021-10-16 03:12:51,283 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:51,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:51,283 INFO L82 PathProgramCache]: Analyzing trace with hash 669134137, now seen corresponding path program 229 times [2021-10-16 03:12:51,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:51,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184644069] [2021-10-16 03:12:51,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:51,284 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:51,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:51,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:51,374 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:51,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184644069] [2021-10-16 03:12:51,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184644069] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:51,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:51,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:12:51,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013513311] [2021-10-16 03:12:51,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:12:51,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:51,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:12:51,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:12:51,376 INFO L87 Difference]: Start difference. First operand 1432 states and 4237 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:51,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:51,692 INFO L93 Difference]: Finished difference Result 1566 states and 4516 transitions. [2021-10-16 03:12:51,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-16 03:12:51,692 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:51,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:51,695 INFO L225 Difference]: With dead ends: 1566 [2021-10-16 03:12:51,695 INFO L226 Difference]: Without dead ends: 1548 [2021-10-16 03:12:51,696 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 147.9ms TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-10-16 03:12:51,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1548 states. [2021-10-16 03:12:51,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1548 to 1426. [2021-10-16 03:12:51,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 2.9628070175438594) internal successors, (4222), 1425 states have internal predecessors, (4222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:51,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 4222 transitions. [2021-10-16 03:12:51,720 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 4222 transitions. Word has length 38 [2021-10-16 03:12:51,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:51,720 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 4222 transitions. [2021-10-16 03:12:51,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:51,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 4222 transitions. [2021-10-16 03:12:51,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:51,722 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:51,723 INFO L512 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] [2021-10-16 03:12:51,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229 [2021-10-16 03:12:51,723 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:51,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:51,723 INFO L82 PathProgramCache]: Analyzing trace with hash -591080225, now seen corresponding path program 230 times [2021-10-16 03:12:51,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:51,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469937165] [2021-10-16 03:12:51,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:51,723 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:51,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:51,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:51,843 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:51,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469937165] [2021-10-16 03:12:51,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469937165] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:51,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:51,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:12:51,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321477943] [2021-10-16 03:12:51,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:12:51,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:51,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:12:51,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:12:51,844 INFO L87 Difference]: Start difference. First operand 1426 states and 4222 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:52,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:52,241 INFO L93 Difference]: Finished difference Result 1564 states and 4507 transitions. [2021-10-16 03:12:52,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-16 03:12:52,241 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:52,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:52,244 INFO L225 Difference]: With dead ends: 1564 [2021-10-16 03:12:52,244 INFO L226 Difference]: Without dead ends: 1548 [2021-10-16 03:12:52,244 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 190.5ms TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-10-16 03:12:52,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1548 states. [2021-10-16 03:12:52,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1548 to 1424. [2021-10-16 03:12:52,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1424 states, 1423 states have (on average 2.9634574841883343) internal successors, (4217), 1423 states have internal predecessors, (4217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:52,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 4217 transitions. [2021-10-16 03:12:52,269 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 4217 transitions. Word has length 38 [2021-10-16 03:12:52,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:52,269 INFO L470 AbstractCegarLoop]: Abstraction has 1424 states and 4217 transitions. [2021-10-16 03:12:52,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:52,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 4217 transitions. [2021-10-16 03:12:52,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:52,271 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:52,271 INFO L512 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] [2021-10-16 03:12:52,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230 [2021-10-16 03:12:52,271 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:52,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:52,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1859361513, now seen corresponding path program 231 times [2021-10-16 03:12:52,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:52,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410568769] [2021-10-16 03:12:52,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:52,272 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:52,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:52,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:52,405 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:52,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410568769] [2021-10-16 03:12:52,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410568769] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:52,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:52,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:12:52,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203365290] [2021-10-16 03:12:52,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:12:52,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:52,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:12:52,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:12:52,407 INFO L87 Difference]: Start difference. First operand 1424 states and 4217 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:52,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:52,806 INFO L93 Difference]: Finished difference Result 1580 states and 4553 transitions. [2021-10-16 03:12:52,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-16 03:12:52,807 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:52,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:52,810 INFO L225 Difference]: With dead ends: 1580 [2021-10-16 03:12:52,810 INFO L226 Difference]: Without dead ends: 1562 [2021-10-16 03:12:52,810 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 180.0ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-10-16 03:12:52,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1562 states. [2021-10-16 03:12:52,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1562 to 1426. [2021-10-16 03:12:52,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 2.9628070175438594) internal successors, (4222), 1425 states have internal predecessors, (4222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:52,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 4222 transitions. [2021-10-16 03:12:52,836 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 4222 transitions. Word has length 38 [2021-10-16 03:12:52,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:52,837 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 4222 transitions. [2021-10-16 03:12:52,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:52,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 4222 transitions. [2021-10-16 03:12:52,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:52,839 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:52,839 INFO L512 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] [2021-10-16 03:12:52,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231 [2021-10-16 03:12:52,839 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:52,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:52,839 INFO L82 PathProgramCache]: Analyzing trace with hash 737322799, now seen corresponding path program 232 times [2021-10-16 03:12:52,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:52,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745201849] [2021-10-16 03:12:52,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:52,840 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:52,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:52,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:52,954 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:52,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745201849] [2021-10-16 03:12:52,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745201849] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:52,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:52,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:12:52,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553896964] [2021-10-16 03:12:52,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:12:52,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:52,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:12:52,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:12:52,956 INFO L87 Difference]: Start difference. First operand 1426 states and 4222 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:53,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:53,361 INFO L93 Difference]: Finished difference Result 1576 states and 4541 transitions. [2021-10-16 03:12:53,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-16 03:12:53,362 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:53,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:53,365 INFO L225 Difference]: With dead ends: 1576 [2021-10-16 03:12:53,365 INFO L226 Difference]: Without dead ends: 1560 [2021-10-16 03:12:53,365 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 199.4ms TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2021-10-16 03:12:53,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2021-10-16 03:12:53,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1432. [2021-10-16 03:12:53,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1431 states have (on average 2.959468902865129) internal successors, (4235), 1431 states have internal predecessors, (4235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:53,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 4235 transitions. [2021-10-16 03:12:53,390 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 4235 transitions. Word has length 38 [2021-10-16 03:12:53,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:53,390 INFO L470 AbstractCegarLoop]: Abstraction has 1432 states and 4235 transitions. [2021-10-16 03:12:53,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:53,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 4235 transitions. [2021-10-16 03:12:53,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:53,392 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:53,392 INFO L512 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] [2021-10-16 03:12:53,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232 [2021-10-16 03:12:53,392 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:53,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:53,393 INFO L82 PathProgramCache]: Analyzing trace with hash 178656825, now seen corresponding path program 233 times [2021-10-16 03:12:53,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:53,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36574455] [2021-10-16 03:12:53,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:53,394 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:53,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:53,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:53,524 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:53,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36574455] [2021-10-16 03:12:53,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36574455] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:53,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:53,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:12:53,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969411606] [2021-10-16 03:12:53,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:12:53,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:53,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:12:53,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:12:53,525 INFO L87 Difference]: Start difference. First operand 1432 states and 4235 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:53,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:53,968 INFO L93 Difference]: Finished difference Result 1588 states and 4566 transitions. [2021-10-16 03:12:53,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-16 03:12:53,969 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:53,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:53,972 INFO L225 Difference]: With dead ends: 1588 [2021-10-16 03:12:53,972 INFO L226 Difference]: Without dead ends: 1562 [2021-10-16 03:12:53,972 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 208.8ms TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2021-10-16 03:12:53,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1562 states. [2021-10-16 03:12:53,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1562 to 1426. [2021-10-16 03:12:53,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 2.9614035087719297) internal successors, (4220), 1425 states have internal predecessors, (4220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:53,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 4220 transitions. [2021-10-16 03:12:53,997 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 4220 transitions. Word has length 38 [2021-10-16 03:12:53,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:53,997 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 4220 transitions. [2021-10-16 03:12:53,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:53,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 4220 transitions. [2021-10-16 03:12:53,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:53,999 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:53,999 INFO L512 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] [2021-10-16 03:12:53,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233 [2021-10-16 03:12:53,999 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:53,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:54,000 INFO L82 PathProgramCache]: Analyzing trace with hash 593847867, now seen corresponding path program 234 times [2021-10-16 03:12:54,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:54,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510827935] [2021-10-16 03:12:54,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:54,000 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:54,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:54,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:54,123 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:54,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510827935] [2021-10-16 03:12:54,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510827935] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:54,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:54,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-16 03:12:54,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180625179] [2021-10-16 03:12:54,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-16 03:12:54,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:54,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-16 03:12:54,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-10-16 03:12:54,124 INFO L87 Difference]: Start difference. First operand 1426 states and 4220 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:54,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:54,616 INFO L93 Difference]: Finished difference Result 1574 states and 4539 transitions. [2021-10-16 03:12:54,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-16 03:12:54,616 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:54,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:54,619 INFO L225 Difference]: With dead ends: 1574 [2021-10-16 03:12:54,619 INFO L226 Difference]: Without dead ends: 1542 [2021-10-16 03:12:54,620 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 227.2ms TimeCoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2021-10-16 03:12:54,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2021-10-16 03:12:54,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1416. [2021-10-16 03:12:54,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1415 states have (on average 2.9674911660777386) internal successors, (4199), 1415 states have internal predecessors, (4199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:54,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 4199 transitions. [2021-10-16 03:12:54,644 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 4199 transitions. Word has length 38 [2021-10-16 03:12:54,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:54,644 INFO L470 AbstractCegarLoop]: Abstraction has 1416 states and 4199 transitions. [2021-10-16 03:12:54,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:54,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 4199 transitions. [2021-10-16 03:12:54,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:54,646 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:54,646 INFO L512 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] [2021-10-16 03:12:54,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234 [2021-10-16 03:12:54,647 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:54,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:54,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1323451083, now seen corresponding path program 235 times [2021-10-16 03:12:54,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:54,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243732659] [2021-10-16 03:12:54,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:54,647 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:54,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:54,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:54,745 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:54,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243732659] [2021-10-16 03:12:54,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243732659] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:54,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:54,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:12:54,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522269927] [2021-10-16 03:12:54,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:12:54,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:54,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:12:54,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:12:54,746 INFO L87 Difference]: Start difference. First operand 1416 states and 4199 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:55,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:55,011 INFO L93 Difference]: Finished difference Result 1440 states and 4233 transitions. [2021-10-16 03:12:55,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-16 03:12:55,011 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:55,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:55,014 INFO L225 Difference]: With dead ends: 1440 [2021-10-16 03:12:55,014 INFO L226 Difference]: Without dead ends: 1420 [2021-10-16 03:12:55,014 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 121.0ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-10-16 03:12:55,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1420 states. [2021-10-16 03:12:55,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1420 to 1416. [2021-10-16 03:12:55,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1415 states have (on average 2.963250883392226) internal successors, (4193), 1415 states have internal predecessors, (4193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:55,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 4193 transitions. [2021-10-16 03:12:55,038 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 4193 transitions. Word has length 38 [2021-10-16 03:12:55,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:55,038 INFO L470 AbstractCegarLoop]: Abstraction has 1416 states and 4193 transitions. [2021-10-16 03:12:55,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:55,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 4193 transitions. [2021-10-16 03:12:55,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:55,040 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:55,040 INFO L512 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] [2021-10-16 03:12:55,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable235 [2021-10-16 03:12:55,041 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:55,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:55,041 INFO L82 PathProgramCache]: Analyzing trace with hash 657467375, now seen corresponding path program 236 times [2021-10-16 03:12:55,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:55,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464690597] [2021-10-16 03:12:55,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:55,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:55,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:55,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:55,143 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:55,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464690597] [2021-10-16 03:12:55,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464690597] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:55,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:55,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-16 03:12:55,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449806951] [2021-10-16 03:12:55,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 03:12:55,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:55,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 03:12:55,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:12:55,144 INFO L87 Difference]: Start difference. First operand 1416 states and 4193 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:55,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:55,476 INFO L93 Difference]: Finished difference Result 1524 states and 4411 transitions. [2021-10-16 03:12:55,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-16 03:12:55,476 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:55,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:55,479 INFO L225 Difference]: With dead ends: 1524 [2021-10-16 03:12:55,479 INFO L226 Difference]: Without dead ends: 1516 [2021-10-16 03:12:55,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 134.4ms TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-10-16 03:12:55,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2021-10-16 03:12:55,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1418. [2021-10-16 03:12:55,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1418 states, 1417 states have (on average 2.9625970359915312) internal successors, (4198), 1417 states have internal predecessors, (4198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:55,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 4198 transitions. [2021-10-16 03:12:55,501 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 4198 transitions. Word has length 38 [2021-10-16 03:12:55,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:55,501 INFO L470 AbstractCegarLoop]: Abstraction has 1418 states and 4198 transitions. [2021-10-16 03:12:55,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:55,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 4198 transitions. [2021-10-16 03:12:55,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:55,503 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:55,503 INFO L512 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] [2021-10-16 03:12:55,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236 [2021-10-16 03:12:55,503 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:55,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:55,503 INFO L82 PathProgramCache]: Analyzing trace with hash -450024191, now seen corresponding path program 237 times [2021-10-16 03:12:55,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:55,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138225532] [2021-10-16 03:12:55,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:55,503 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:55,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:55,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:55,596 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:55,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138225532] [2021-10-16 03:12:55,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138225532] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:55,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:55,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:12:55,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699498829] [2021-10-16 03:12:55,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:12:55,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:55,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:12:55,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:12:55,597 INFO L87 Difference]: Start difference. First operand 1418 states and 4198 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:55,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:55,918 INFO L93 Difference]: Finished difference Result 1522 states and 4404 transitions. [2021-10-16 03:12:55,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-16 03:12:55,918 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:55,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:55,921 INFO L225 Difference]: With dead ends: 1522 [2021-10-16 03:12:55,921 INFO L226 Difference]: Without dead ends: 1514 [2021-10-16 03:12:55,921 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 142.2ms TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2021-10-16 03:12:55,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2021-10-16 03:12:55,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1424. [2021-10-16 03:12:55,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1424 states, 1423 states have (on average 2.9592410400562192) internal successors, (4211), 1423 states have internal predecessors, (4211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:55,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 4211 transitions. [2021-10-16 03:12:55,943 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 4211 transitions. Word has length 38 [2021-10-16 03:12:55,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:55,943 INFO L470 AbstractCegarLoop]: Abstraction has 1424 states and 4211 transitions. [2021-10-16 03:12:55,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:55,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 4211 transitions. [2021-10-16 03:12:55,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:55,945 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:55,945 INFO L512 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] [2021-10-16 03:12:55,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237 [2021-10-16 03:12:55,945 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:55,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:55,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1444337811, now seen corresponding path program 238 times [2021-10-16 03:12:55,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:55,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514440638] [2021-10-16 03:12:55,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:55,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:55,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:56,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:56,050 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:56,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514440638] [2021-10-16 03:12:56,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514440638] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:56,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:56,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:12:56,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112604519] [2021-10-16 03:12:56,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:12:56,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:56,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:12:56,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:12:56,051 INFO L87 Difference]: Start difference. First operand 1424 states and 4211 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:56,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:56,389 INFO L93 Difference]: Finished difference Result 1464 states and 4279 transitions. [2021-10-16 03:12:56,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-16 03:12:56,390 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:56,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:56,393 INFO L225 Difference]: With dead ends: 1464 [2021-10-16 03:12:56,393 INFO L226 Difference]: Without dead ends: 1446 [2021-10-16 03:12:56,393 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 140.4ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-10-16 03:12:56,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1446 states. [2021-10-16 03:12:56,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1446 to 1418. [2021-10-16 03:12:56,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1418 states, 1417 states have (on average 2.961185603387438) internal successors, (4196), 1417 states have internal predecessors, (4196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:56,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 4196 transitions. [2021-10-16 03:12:56,417 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 4196 transitions. Word has length 38 [2021-10-16 03:12:56,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:56,417 INFO L470 AbstractCegarLoop]: Abstraction has 1418 states and 4196 transitions. [2021-10-16 03:12:56,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:56,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 4196 transitions. [2021-10-16 03:12:56,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:56,419 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:56,419 INFO L512 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] [2021-10-16 03:12:56,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238 [2021-10-16 03:12:56,419 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:56,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:56,420 INFO L82 PathProgramCache]: Analyzing trace with hash 136039125, now seen corresponding path program 239 times [2021-10-16 03:12:56,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:56,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798796160] [2021-10-16 03:12:56,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:56,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:56,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:56,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:56,515 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:56,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798796160] [2021-10-16 03:12:56,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798796160] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:56,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:56,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:12:56,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668117400] [2021-10-16 03:12:56,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:12:56,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:56,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:12:56,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:12:56,517 INFO L87 Difference]: Start difference. First operand 1418 states and 4196 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:56,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:56,837 INFO L93 Difference]: Finished difference Result 1460 states and 4267 transitions. [2021-10-16 03:12:56,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-16 03:12:56,837 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:56,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:56,840 INFO L225 Difference]: With dead ends: 1460 [2021-10-16 03:12:56,840 INFO L226 Difference]: Without dead ends: 1438 [2021-10-16 03:12:56,840 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 152.4ms TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-10-16 03:12:56,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1438 states. [2021-10-16 03:12:56,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1438 to 1410. [2021-10-16 03:12:56,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1409 states have (on average 2.965223562810504) internal successors, (4178), 1409 states have internal predecessors, (4178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:56,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 4178 transitions. [2021-10-16 03:12:56,864 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 4178 transitions. Word has length 38 [2021-10-16 03:12:56,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:56,864 INFO L470 AbstractCegarLoop]: Abstraction has 1410 states and 4178 transitions. [2021-10-16 03:12:56,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:56,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 4178 transitions. [2021-10-16 03:12:56,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:56,866 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:56,867 INFO L512 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] [2021-10-16 03:12:56,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239 [2021-10-16 03:12:56,867 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:56,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:56,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1412411295, now seen corresponding path program 240 times [2021-10-16 03:12:56,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:56,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580210090] [2021-10-16 03:12:56,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:56,868 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:56,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:56,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:56,990 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:56,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580210090] [2021-10-16 03:12:56,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580210090] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:56,991 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:56,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-16 03:12:56,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883213050] [2021-10-16 03:12:56,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-16 03:12:56,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:56,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-16 03:12:56,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-10-16 03:12:56,992 INFO L87 Difference]: Start difference. First operand 1410 states and 4178 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:57,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:57,455 INFO L93 Difference]: Finished difference Result 1484 states and 4316 transitions. [2021-10-16 03:12:57,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-16 03:12:57,456 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:57,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:57,458 INFO L225 Difference]: With dead ends: 1484 [2021-10-16 03:12:57,458 INFO L226 Difference]: Without dead ends: 1456 [2021-10-16 03:12:57,459 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 218.8ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-10-16 03:12:57,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2021-10-16 03:12:57,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1404. [2021-10-16 03:12:57,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 2.9672131147540983) internal successors, (4163), 1403 states have internal predecessors, (4163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:57,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 4163 transitions. [2021-10-16 03:12:57,481 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 4163 transitions. Word has length 38 [2021-10-16 03:12:57,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:57,481 INFO L470 AbstractCegarLoop]: Abstraction has 1404 states and 4163 transitions. [2021-10-16 03:12:57,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:57,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 4163 transitions. [2021-10-16 03:12:57,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:57,483 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:57,483 INFO L512 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] [2021-10-16 03:12:57,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240 [2021-10-16 03:12:57,483 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:57,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:57,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1745962853, now seen corresponding path program 241 times [2021-10-16 03:12:57,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:57,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425385563] [2021-10-16 03:12:57,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:57,484 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:57,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:57,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:57,593 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:57,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425385563] [2021-10-16 03:12:57,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425385563] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:57,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:57,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:12:57,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315487705] [2021-10-16 03:12:57,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:12:57,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:57,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:12:57,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:12:57,595 INFO L87 Difference]: Start difference. First operand 1404 states and 4163 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:58,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:58,053 INFO L93 Difference]: Finished difference Result 1486 states and 4323 transitions. [2021-10-16 03:12:58,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-16 03:12:58,054 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:58,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:58,057 INFO L225 Difference]: With dead ends: 1486 [2021-10-16 03:12:58,057 INFO L226 Difference]: Without dead ends: 1466 [2021-10-16 03:12:58,057 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 197.8ms TimeCoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2021-10-16 03:12:58,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1466 states. [2021-10-16 03:12:58,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1466 to 1412. [2021-10-16 03:12:58,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 2.9603118355776044) internal successors, (4177), 1411 states have internal predecessors, (4177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:58,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 4177 transitions. [2021-10-16 03:12:58,081 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 4177 transitions. Word has length 38 [2021-10-16 03:12:58,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:58,081 INFO L470 AbstractCegarLoop]: Abstraction has 1412 states and 4177 transitions. [2021-10-16 03:12:58,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:58,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 4177 transitions. [2021-10-16 03:12:58,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:58,083 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:58,083 INFO L512 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] [2021-10-16 03:12:58,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241 [2021-10-16 03:12:58,084 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:58,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:58,084 INFO L82 PathProgramCache]: Analyzing trace with hash 41985487, now seen corresponding path program 242 times [2021-10-16 03:12:58,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:58,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211158173] [2021-10-16 03:12:58,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:58,084 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:58,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:58,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:58,188 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:58,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211158173] [2021-10-16 03:12:58,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211158173] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:58,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:58,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:12:58,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873481151] [2021-10-16 03:12:58,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:12:58,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:58,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:12:58,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:12:58,189 INFO L87 Difference]: Start difference. First operand 1412 states and 4177 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:58,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:58,547 INFO L93 Difference]: Finished difference Result 1468 states and 4285 transitions. [2021-10-16 03:12:58,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-16 03:12:58,547 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:58,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:58,549 INFO L225 Difference]: With dead ends: 1468 [2021-10-16 03:12:58,550 INFO L226 Difference]: Without dead ends: 1450 [2021-10-16 03:12:58,550 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 157.3ms TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-10-16 03:12:58,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1450 states. [2021-10-16 03:12:58,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1450 to 1412. [2021-10-16 03:12:58,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 2.9603118355776044) internal successors, (4177), 1411 states have internal predecessors, (4177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:58,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 4177 transitions. [2021-10-16 03:12:58,571 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 4177 transitions. Word has length 38 [2021-10-16 03:12:58,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:58,571 INFO L470 AbstractCegarLoop]: Abstraction has 1412 states and 4177 transitions. [2021-10-16 03:12:58,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:58,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 4177 transitions. [2021-10-16 03:12:58,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:58,573 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:58,573 INFO L512 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] [2021-10-16 03:12:58,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242 [2021-10-16 03:12:58,573 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:58,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:58,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1525850815, now seen corresponding path program 243 times [2021-10-16 03:12:58,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:58,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058402218] [2021-10-16 03:12:58,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:58,573 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:58,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:58,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:58,696 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:58,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058402218] [2021-10-16 03:12:58,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058402218] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:58,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:58,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:12:58,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56466891] [2021-10-16 03:12:58,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:12:58,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:58,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:12:58,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:12:58,697 INFO L87 Difference]: Start difference. First operand 1412 states and 4177 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:59,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:59,165 INFO L93 Difference]: Finished difference Result 1462 states and 4270 transitions. [2021-10-16 03:12:59,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-16 03:12:59,166 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:59,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:59,170 INFO L225 Difference]: With dead ends: 1462 [2021-10-16 03:12:59,170 INFO L226 Difference]: Without dead ends: 1440 [2021-10-16 03:12:59,170 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 214.1ms TimeCoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2021-10-16 03:12:59,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2021-10-16 03:12:59,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 1406. [2021-10-16 03:12:59,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1406 states, 1405 states have (on average 2.965124555160142) internal successors, (4166), 1405 states have internal predecessors, (4166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:59,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1406 states to 1406 states and 4166 transitions. [2021-10-16 03:12:59,208 INFO L78 Accepts]: Start accepts. Automaton has 1406 states and 4166 transitions. Word has length 38 [2021-10-16 03:12:59,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:59,209 INFO L470 AbstractCegarLoop]: Abstraction has 1406 states and 4166 transitions. [2021-10-16 03:12:59,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:59,209 INFO L276 IsEmpty]: Start isEmpty. Operand 1406 states and 4166 transitions. [2021-10-16 03:12:59,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:59,212 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:59,212 INFO L512 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] [2021-10-16 03:12:59,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243 [2021-10-16 03:12:59,213 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:59,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:59,213 INFO L82 PathProgramCache]: Analyzing trace with hash -364980843, now seen corresponding path program 244 times [2021-10-16 03:12:59,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:59,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282896514] [2021-10-16 03:12:59,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:59,214 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:59,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:59,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:59,360 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:59,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282896514] [2021-10-16 03:12:59,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282896514] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:59,361 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:59,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-16 03:12:59,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044287083] [2021-10-16 03:12:59,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-16 03:12:59,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:59,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-16 03:12:59,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-10-16 03:12:59,361 INFO L87 Difference]: Start difference. First operand 1406 states and 4166 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:59,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:59,824 INFO L93 Difference]: Finished difference Result 1468 states and 4286 transitions. [2021-10-16 03:12:59,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-16 03:12:59,824 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:12:59,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:59,827 INFO L225 Difference]: With dead ends: 1468 [2021-10-16 03:12:59,827 INFO L226 Difference]: Without dead ends: 1438 [2021-10-16 03:12:59,827 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 236.2ms TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2021-10-16 03:12:59,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1438 states. [2021-10-16 03:12:59,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1438 to 1398. [2021-10-16 03:12:59,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 2.9692197566213316) internal successors, (4148), 1397 states have internal predecessors, (4148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:59,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 4148 transitions. [2021-10-16 03:12:59,851 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 4148 transitions. Word has length 38 [2021-10-16 03:12:59,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:59,851 INFO L470 AbstractCegarLoop]: Abstraction has 1398 states and 4148 transitions. [2021-10-16 03:12:59,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:59,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 4148 transitions. [2021-10-16 03:12:59,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:12:59,853 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:59,853 INFO L512 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] [2021-10-16 03:12:59,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244 [2021-10-16 03:12:59,854 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:12:59,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:59,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1300139515, now seen corresponding path program 245 times [2021-10-16 03:12:59,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:12:59,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82513009] [2021-10-16 03:12:59,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:59,854 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:12:59,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:59,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:59,966 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:12:59,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82513009] [2021-10-16 03:12:59,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82513009] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:59,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:59,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-16 03:12:59,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32401346] [2021-10-16 03:12:59,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 03:12:59,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:12:59,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 03:12:59,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:12:59,967 INFO L87 Difference]: Start difference. First operand 1398 states and 4148 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:00,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:00,241 INFO L93 Difference]: Finished difference Result 1508 states and 4377 transitions. [2021-10-16 03:13:00,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-16 03:13:00,241 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:00,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:00,244 INFO L225 Difference]: With dead ends: 1508 [2021-10-16 03:13:00,244 INFO L226 Difference]: Without dead ends: 1500 [2021-10-16 03:13:00,244 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 124.5ms TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-10-16 03:13:00,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1500 states. [2021-10-16 03:13:00,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1500 to 1412. [2021-10-16 03:13:00,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 2.968816442239546) internal successors, (4189), 1411 states have internal predecessors, (4189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:00,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 4189 transitions. [2021-10-16 03:13:00,267 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 4189 transitions. Word has length 38 [2021-10-16 03:13:00,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:00,267 INFO L470 AbstractCegarLoop]: Abstraction has 1412 states and 4189 transitions. [2021-10-16 03:13:00,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:00,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 4189 transitions. [2021-10-16 03:13:00,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:00,269 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:00,269 INFO L512 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] [2021-10-16 03:13:00,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable245 [2021-10-16 03:13:00,269 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:00,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:00,270 INFO L82 PathProgramCache]: Analyzing trace with hash 305825895, now seen corresponding path program 246 times [2021-10-16 03:13:00,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:00,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968290037] [2021-10-16 03:13:00,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:00,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:00,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:00,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:00,359 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:00,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968290037] [2021-10-16 03:13:00,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968290037] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:00,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:00,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-16 03:13:00,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746004489] [2021-10-16 03:13:00,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 03:13:00,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:00,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 03:13:00,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:13:00,360 INFO L87 Difference]: Start difference. First operand 1412 states and 4189 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:00,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:00,602 INFO L93 Difference]: Finished difference Result 1484 states and 4323 transitions. [2021-10-16 03:13:00,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-16 03:13:00,602 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:00,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:00,604 INFO L225 Difference]: With dead ends: 1484 [2021-10-16 03:13:00,605 INFO L226 Difference]: Without dead ends: 1466 [2021-10-16 03:13:00,605 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 96.9ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-10-16 03:13:00,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1466 states. [2021-10-16 03:13:00,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1466 to 1406. [2021-10-16 03:13:00,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1406 states, 1405 states have (on average 2.9679715302491103) internal successors, (4170), 1405 states have internal predecessors, (4170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:00,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1406 states to 1406 states and 4170 transitions. [2021-10-16 03:13:00,626 INFO L78 Accepts]: Start accepts. Automaton has 1406 states and 4170 transitions. Word has length 38 [2021-10-16 03:13:00,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:00,626 INFO L470 AbstractCegarLoop]: Abstraction has 1406 states and 4170 transitions. [2021-10-16 03:13:00,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:00,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1406 states and 4170 transitions. [2021-10-16 03:13:00,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:00,628 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:00,628 INFO L512 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] [2021-10-16 03:13:00,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable246 [2021-10-16 03:13:00,628 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:00,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:00,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1341836385, now seen corresponding path program 247 times [2021-10-16 03:13:00,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:00,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677239851] [2021-10-16 03:13:00,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:00,629 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:00,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:00,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:00,731 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:00,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677239851] [2021-10-16 03:13:00,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677239851] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:00,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:00,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:13:00,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914540715] [2021-10-16 03:13:00,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:13:00,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:00,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:13:00,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:13:00,732 INFO L87 Difference]: Start difference. First operand 1406 states and 4170 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:00,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:00,998 INFO L93 Difference]: Finished difference Result 1494 states and 4344 transitions. [2021-10-16 03:13:00,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-16 03:13:00,998 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:00,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:01,001 INFO L225 Difference]: With dead ends: 1494 [2021-10-16 03:13:01,001 INFO L226 Difference]: Without dead ends: 1486 [2021-10-16 03:13:01,001 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 135.4ms TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-10-16 03:13:01,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2021-10-16 03:13:01,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 1408. [2021-10-16 03:13:01,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1408 states, 1407 states have (on average 2.9658848614072495) internal successors, (4173), 1407 states have internal predecessors, (4173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:01,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 4173 transitions. [2021-10-16 03:13:01,022 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 4173 transitions. Word has length 38 [2021-10-16 03:13:01,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:01,022 INFO L470 AbstractCegarLoop]: Abstraction has 1408 states and 4173 transitions. [2021-10-16 03:13:01,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:01,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 4173 transitions. [2021-10-16 03:13:01,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:01,024 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:01,024 INFO L512 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] [2021-10-16 03:13:01,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247 [2021-10-16 03:13:01,024 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:01,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:01,024 INFO L82 PathProgramCache]: Analyzing trace with hash -219420939, now seen corresponding path program 248 times [2021-10-16 03:13:01,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:01,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658464956] [2021-10-16 03:13:01,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:01,025 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:01,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:01,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:01,117 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:01,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658464956] [2021-10-16 03:13:01,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658464956] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:01,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:01,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:13:01,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205173907] [2021-10-16 03:13:01,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:13:01,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:01,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:13:01,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:13:01,118 INFO L87 Difference]: Start difference. First operand 1408 states and 4173 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:01,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:01,413 INFO L93 Difference]: Finished difference Result 1500 states and 4355 transitions. [2021-10-16 03:13:01,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-16 03:13:01,413 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:01,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:01,416 INFO L225 Difference]: With dead ends: 1500 [2021-10-16 03:13:01,416 INFO L226 Difference]: Without dead ends: 1482 [2021-10-16 03:13:01,416 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 140.5ms TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2021-10-16 03:13:01,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2021-10-16 03:13:01,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 1412. [2021-10-16 03:13:01,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 2.9631467044649185) internal successors, (4181), 1411 states have internal predecessors, (4181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:01,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 4181 transitions. [2021-10-16 03:13:01,437 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 4181 transitions. Word has length 38 [2021-10-16 03:13:01,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:01,437 INFO L470 AbstractCegarLoop]: Abstraction has 1412 states and 4181 transitions. [2021-10-16 03:13:01,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:01,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 4181 transitions. [2021-10-16 03:13:01,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:01,439 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:01,439 INFO L512 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] [2021-10-16 03:13:01,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248 [2021-10-16 03:13:01,440 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:01,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:01,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1199866143, now seen corresponding path program 249 times [2021-10-16 03:13:01,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:01,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429719535] [2021-10-16 03:13:01,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:01,440 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:01,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:01,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:01,528 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:01,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429719535] [2021-10-16 03:13:01,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429719535] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:01,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:01,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:13:01,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108306247] [2021-10-16 03:13:01,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:13:01,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:01,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:13:01,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:13:01,529 INFO L87 Difference]: Start difference. First operand 1412 states and 4181 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:01,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:01,854 INFO L93 Difference]: Finished difference Result 1518 states and 4387 transitions. [2021-10-16 03:13:01,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-16 03:13:01,855 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:01,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:01,858 INFO L225 Difference]: With dead ends: 1518 [2021-10-16 03:13:01,858 INFO L226 Difference]: Without dead ends: 1486 [2021-10-16 03:13:01,858 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 130.3ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-10-16 03:13:01,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2021-10-16 03:13:01,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 1400. [2021-10-16 03:13:01,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 1399 states have (on average 2.9685489635453894) internal successors, (4153), 1399 states have internal predecessors, (4153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:01,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 4153 transitions. [2021-10-16 03:13:01,884 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 4153 transitions. Word has length 38 [2021-10-16 03:13:01,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:01,885 INFO L470 AbstractCegarLoop]: Abstraction has 1400 states and 4153 transitions. [2021-10-16 03:13:01,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:01,885 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 4153 transitions. [2021-10-16 03:13:01,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:01,887 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:01,887 INFO L512 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] [2021-10-16 03:13:01,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249 [2021-10-16 03:13:01,887 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:01,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:01,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1392885945, now seen corresponding path program 250 times [2021-10-16 03:13:01,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:01,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501286912] [2021-10-16 03:13:01,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:01,888 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:01,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:01,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:01,973 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:01,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501286912] [2021-10-16 03:13:01,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501286912] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:01,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:01,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-16 03:13:01,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104038211] [2021-10-16 03:13:01,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 03:13:01,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:01,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 03:13:01,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:13:01,975 INFO L87 Difference]: Start difference. First operand 1400 states and 4153 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:02,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:02,292 INFO L93 Difference]: Finished difference Result 1500 states and 4359 transitions. [2021-10-16 03:13:02,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-16 03:13:02,293 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:02,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:02,296 INFO L225 Difference]: With dead ends: 1500 [2021-10-16 03:13:02,296 INFO L226 Difference]: Without dead ends: 1492 [2021-10-16 03:13:02,296 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 134.4ms TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-10-16 03:13:02,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-10-16 03:13:02,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 1402. [2021-10-16 03:13:02,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1402 states, 1401 states have (on average 2.967880085653105) internal successors, (4158), 1401 states have internal predecessors, (4158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:02,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1402 states to 1402 states and 4158 transitions. [2021-10-16 03:13:02,322 INFO L78 Accepts]: Start accepts. Automaton has 1402 states and 4158 transitions. Word has length 38 [2021-10-16 03:13:02,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:02,323 INFO L470 AbstractCegarLoop]: Abstraction has 1402 states and 4158 transitions. [2021-10-16 03:13:02,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:02,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1402 states and 4158 transitions. [2021-10-16 03:13:02,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:02,325 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:02,325 INFO L512 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] [2021-10-16 03:13:02,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250 [2021-10-16 03:13:02,325 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:02,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:02,326 INFO L82 PathProgramCache]: Analyzing trace with hash 285394379, now seen corresponding path program 251 times [2021-10-16 03:13:02,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:02,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617091662] [2021-10-16 03:13:02,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:02,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:02,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:02,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:02,461 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:02,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617091662] [2021-10-16 03:13:02,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617091662] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:02,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:02,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:13:02,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191125295] [2021-10-16 03:13:02,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:13:02,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:02,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:13:02,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:13:02,463 INFO L87 Difference]: Start difference. First operand 1402 states and 4158 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:02,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:02,835 INFO L93 Difference]: Finished difference Result 1498 states and 4352 transitions. [2021-10-16 03:13:02,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-16 03:13:02,836 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:02,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:02,839 INFO L225 Difference]: With dead ends: 1498 [2021-10-16 03:13:02,839 INFO L226 Difference]: Without dead ends: 1490 [2021-10-16 03:13:02,839 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 178.0ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-10-16 03:13:02,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2021-10-16 03:13:02,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1408. [2021-10-16 03:13:02,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1408 states, 1407 states have (on average 2.9644633972992183) internal successors, (4171), 1407 states have internal predecessors, (4171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:02,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 4171 transitions. [2021-10-16 03:13:02,864 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 4171 transitions. Word has length 38 [2021-10-16 03:13:02,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:02,864 INFO L470 AbstractCegarLoop]: Abstraction has 1408 states and 4171 transitions. [2021-10-16 03:13:02,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:02,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 4171 transitions. [2021-10-16 03:13:02,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:02,866 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:02,866 INFO L512 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] [2021-10-16 03:13:02,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251 [2021-10-16 03:13:02,866 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:02,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:02,867 INFO L82 PathProgramCache]: Analyzing trace with hash -708919241, now seen corresponding path program 252 times [2021-10-16 03:13:02,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:02,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554317854] [2021-10-16 03:13:02,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:02,867 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:02,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:02,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:02,975 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:02,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554317854] [2021-10-16 03:13:02,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554317854] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:02,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:02,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:13:02,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896402336] [2021-10-16 03:13:02,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:13:02,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:02,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:13:02,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:13:02,976 INFO L87 Difference]: Start difference. First operand 1408 states and 4171 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:03,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:03,266 INFO L93 Difference]: Finished difference Result 1440 states and 4227 transitions. [2021-10-16 03:13:03,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-16 03:13:03,267 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:03,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:03,270 INFO L225 Difference]: With dead ends: 1440 [2021-10-16 03:13:03,270 INFO L226 Difference]: Without dead ends: 1422 [2021-10-16 03:13:03,270 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 136.7ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-10-16 03:13:03,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1422 states. [2021-10-16 03:13:03,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1422 to 1402. [2021-10-16 03:13:03,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1402 states, 1401 states have (on average 2.966452533904354) internal successors, (4156), 1401 states have internal predecessors, (4156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:03,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1402 states to 1402 states and 4156 transitions. [2021-10-16 03:13:03,296 INFO L78 Accepts]: Start accepts. Automaton has 1402 states and 4156 transitions. Word has length 38 [2021-10-16 03:13:03,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:03,297 INFO L470 AbstractCegarLoop]: Abstraction has 1402 states and 4156 transitions. [2021-10-16 03:13:03,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:03,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1402 states and 4156 transitions. [2021-10-16 03:13:03,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:03,299 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:03,299 INFO L512 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] [2021-10-16 03:13:03,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252 [2021-10-16 03:13:03,299 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:03,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:03,299 INFO L82 PathProgramCache]: Analyzing trace with hash 871457695, now seen corresponding path program 253 times [2021-10-16 03:13:03,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:03,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097724820] [2021-10-16 03:13:03,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:03,300 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:03,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:03,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:03,421 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:03,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097724820] [2021-10-16 03:13:03,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097724820] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:03,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:03,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:13:03,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948834528] [2021-10-16 03:13:03,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:13:03,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:03,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:13:03,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:13:03,422 INFO L87 Difference]: Start difference. First operand 1402 states and 4156 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:03,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:03,760 INFO L93 Difference]: Finished difference Result 1436 states and 4215 transitions. [2021-10-16 03:13:03,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-16 03:13:03,760 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:03,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:03,763 INFO L225 Difference]: With dead ends: 1436 [2021-10-16 03:13:03,763 INFO L226 Difference]: Without dead ends: 1420 [2021-10-16 03:13:03,763 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 166.6ms TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-10-16 03:13:03,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1420 states. [2021-10-16 03:13:03,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1420 to 1400. [2021-10-16 03:13:03,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 1399 states have (on average 2.9671193709792707) internal successors, (4151), 1399 states have internal predecessors, (4151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:03,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 4151 transitions. [2021-10-16 03:13:03,790 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 4151 transitions. Word has length 38 [2021-10-16 03:13:03,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:03,790 INFO L470 AbstractCegarLoop]: Abstraction has 1400 states and 4151 transitions. [2021-10-16 03:13:03,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:03,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 4151 transitions. [2021-10-16 03:13:03,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:03,792 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:03,793 INFO L512 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] [2021-10-16 03:13:03,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253 [2021-10-16 03:13:03,793 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:03,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:03,794 INFO L82 PathProgramCache]: Analyzing trace with hash -254480955, now seen corresponding path program 254 times [2021-10-16 03:13:03,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:03,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311221300] [2021-10-16 03:13:03,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:03,794 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:03,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:03,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:03,942 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:03,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311221300] [2021-10-16 03:13:03,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311221300] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:03,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:03,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:13:03,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765221426] [2021-10-16 03:13:03,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:13:03,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:03,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:13:03,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:13:03,944 INFO L87 Difference]: Start difference. First operand 1400 states and 4151 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:04,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:04,345 INFO L93 Difference]: Finished difference Result 1482 states and 4311 transitions. [2021-10-16 03:13:04,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-16 03:13:04,346 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:04,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:04,349 INFO L225 Difference]: With dead ends: 1482 [2021-10-16 03:13:04,349 INFO L226 Difference]: Without dead ends: 1462 [2021-10-16 03:13:04,349 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 194.1ms TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-10-16 03:13:04,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2021-10-16 03:13:04,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1408. [2021-10-16 03:13:04,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1408 states, 1407 states have (on average 2.9601990049751246) internal successors, (4165), 1407 states have internal predecessors, (4165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:04,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 4165 transitions. [2021-10-16 03:13:04,375 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 4165 transitions. Word has length 38 [2021-10-16 03:13:04,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:04,375 INFO L470 AbstractCegarLoop]: Abstraction has 1408 states and 4165 transitions. [2021-10-16 03:13:04,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:04,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 4165 transitions. [2021-10-16 03:13:04,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:04,379 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:04,379 INFO L512 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] [2021-10-16 03:13:04,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254 [2021-10-16 03:13:04,380 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:04,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:04,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1958458321, now seen corresponding path program 255 times [2021-10-16 03:13:04,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:04,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212817635] [2021-10-16 03:13:04,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:04,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:04,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:04,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:04,500 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:04,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212817635] [2021-10-16 03:13:04,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212817635] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:04,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:04,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:13:04,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833360624] [2021-10-16 03:13:04,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:13:04,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:04,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:13:04,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:13:04,503 INFO L87 Difference]: Start difference. First operand 1408 states and 4165 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:04,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:04,838 INFO L93 Difference]: Finished difference Result 1464 states and 4273 transitions. [2021-10-16 03:13:04,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-16 03:13:04,840 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:04,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:04,844 INFO L225 Difference]: With dead ends: 1464 [2021-10-16 03:13:04,844 INFO L226 Difference]: Without dead ends: 1446 [2021-10-16 03:13:04,845 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 151.7ms TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-10-16 03:13:04,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1446 states. [2021-10-16 03:13:04,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1446 to 1408. [2021-10-16 03:13:04,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1408 states, 1407 states have (on average 2.9601990049751246) internal successors, (4165), 1407 states have internal predecessors, (4165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:04,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 4165 transitions. [2021-10-16 03:13:04,882 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 4165 transitions. Word has length 38 [2021-10-16 03:13:04,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:04,882 INFO L470 AbstractCegarLoop]: Abstraction has 1408 states and 4165 transitions. [2021-10-16 03:13:04,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:04,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 4165 transitions. [2021-10-16 03:13:04,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:04,885 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:04,885 INFO L512 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] [2021-10-16 03:13:04,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255 [2021-10-16 03:13:04,885 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:04,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:04,886 INFO L82 PathProgramCache]: Analyzing trace with hash 768672673, now seen corresponding path program 256 times [2021-10-16 03:13:04,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:04,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270064698] [2021-10-16 03:13:04,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:04,887 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:04,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:05,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:05,007 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:05,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270064698] [2021-10-16 03:13:05,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270064698] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:05,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:05,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:13:05,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184076995] [2021-10-16 03:13:05,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:13:05,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:05,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:13:05,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:13:05,009 INFO L87 Difference]: Start difference. First operand 1408 states and 4165 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:05,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:05,407 INFO L93 Difference]: Finished difference Result 1458 states and 4258 transitions. [2021-10-16 03:13:05,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-16 03:13:05,407 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:05,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:05,410 INFO L225 Difference]: With dead ends: 1458 [2021-10-16 03:13:05,410 INFO L226 Difference]: Without dead ends: 1436 [2021-10-16 03:13:05,411 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 187.3ms TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-10-16 03:13:05,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1436 states. [2021-10-16 03:13:05,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1436 to 1402. [2021-10-16 03:13:05,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1402 states, 1401 states have (on average 2.965024982155603) internal successors, (4154), 1401 states have internal predecessors, (4154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:05,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1402 states to 1402 states and 4154 transitions. [2021-10-16 03:13:05,438 INFO L78 Accepts]: Start accepts. Automaton has 1402 states and 4154 transitions. Word has length 38 [2021-10-16 03:13:05,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:05,438 INFO L470 AbstractCegarLoop]: Abstraction has 1402 states and 4154 transitions. [2021-10-16 03:13:05,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:05,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1402 states and 4154 transitions. [2021-10-16 03:13:05,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:05,441 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:05,441 INFO L512 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] [2021-10-16 03:13:05,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable256 [2021-10-16 03:13:05,441 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:05,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:05,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1929542645, now seen corresponding path program 257 times [2021-10-16 03:13:05,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:05,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976864060] [2021-10-16 03:13:05,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:05,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:05,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:05,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:05,570 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:05,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976864060] [2021-10-16 03:13:05,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976864060] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:05,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:05,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-16 03:13:05,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152864725] [2021-10-16 03:13:05,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-16 03:13:05,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:05,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-16 03:13:05,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-10-16 03:13:05,572 INFO L87 Difference]: Start difference. First operand 1402 states and 4154 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:05,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:05,984 INFO L93 Difference]: Finished difference Result 1464 states and 4274 transitions. [2021-10-16 03:13:05,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-16 03:13:05,984 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:05,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:05,987 INFO L225 Difference]: With dead ends: 1464 [2021-10-16 03:13:05,988 INFO L226 Difference]: Without dead ends: 1432 [2021-10-16 03:13:05,988 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 198.2ms TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-10-16 03:13:05,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2021-10-16 03:13:06,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 1392. [2021-10-16 03:13:06,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 2.9712437095614668) internal successors, (4133), 1391 states have internal predecessors, (4133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:06,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4133 transitions. [2021-10-16 03:13:06,013 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4133 transitions. Word has length 38 [2021-10-16 03:13:06,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:06,013 INFO L470 AbstractCegarLoop]: Abstraction has 1392 states and 4133 transitions. [2021-10-16 03:13:06,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:06,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4133 transitions. [2021-10-16 03:13:06,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:06,015 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:06,016 INFO L512 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] [2021-10-16 03:13:06,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable257 [2021-10-16 03:13:06,016 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:06,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:06,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1033642789, now seen corresponding path program 258 times [2021-10-16 03:13:06,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:06,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040955804] [2021-10-16 03:13:06,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:06,016 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:06,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:06,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:06,115 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:06,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040955804] [2021-10-16 03:13:06,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040955804] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:06,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:06,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:13:06,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162191919] [2021-10-16 03:13:06,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:13:06,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:06,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:13:06,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:13:06,116 INFO L87 Difference]: Start difference. First operand 1392 states and 4133 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:06,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:06,379 INFO L93 Difference]: Finished difference Result 1526 states and 4404 transitions. [2021-10-16 03:13:06,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-16 03:13:06,380 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:06,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:06,382 INFO L225 Difference]: With dead ends: 1526 [2021-10-16 03:13:06,383 INFO L226 Difference]: Without dead ends: 1518 [2021-10-16 03:13:06,383 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 112.6ms TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-10-16 03:13:06,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2021-10-16 03:13:06,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 1400. [2021-10-16 03:13:06,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 1399 states have (on average 2.971408148677627) internal successors, (4157), 1399 states have internal predecessors, (4157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:06,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 4157 transitions. [2021-10-16 03:13:06,408 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 4157 transitions. Word has length 38 [2021-10-16 03:13:06,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:06,408 INFO L470 AbstractCegarLoop]: Abstraction has 1400 states and 4157 transitions. [2021-10-16 03:13:06,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:06,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 4157 transitions. [2021-10-16 03:13:06,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:06,410 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:06,410 INFO L512 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] [2021-10-16 03:13:06,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258 [2021-10-16 03:13:06,411 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:06,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:06,411 INFO L82 PathProgramCache]: Analyzing trace with hash -770456959, now seen corresponding path program 259 times [2021-10-16 03:13:06,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:06,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564174718] [2021-10-16 03:13:06,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:06,411 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:06,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:06,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:06,522 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:06,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564174718] [2021-10-16 03:13:06,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564174718] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:06,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:06,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:13:06,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292172152] [2021-10-16 03:13:06,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:13:06,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:06,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:13:06,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:13:06,523 INFO L87 Difference]: Start difference. First operand 1400 states and 4157 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:06,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:06,831 INFO L93 Difference]: Finished difference Result 1516 states and 4385 transitions. [2021-10-16 03:13:06,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-16 03:13:06,832 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:06,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:06,835 INFO L225 Difference]: With dead ends: 1516 [2021-10-16 03:13:06,835 INFO L226 Difference]: Without dead ends: 1498 [2021-10-16 03:13:06,835 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 138.3ms TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-10-16 03:13:06,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2021-10-16 03:13:06,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1398. [2021-10-16 03:13:06,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 2.972083035075161) internal successors, (4152), 1397 states have internal predecessors, (4152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:06,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 4152 transitions. [2021-10-16 03:13:06,861 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 4152 transitions. Word has length 38 [2021-10-16 03:13:06,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:06,861 INFO L470 AbstractCegarLoop]: Abstraction has 1398 states and 4152 transitions. [2021-10-16 03:13:06,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:06,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 4152 transitions. [2021-10-16 03:13:06,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:06,864 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:06,864 INFO L512 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] [2021-10-16 03:13:06,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259 [2021-10-16 03:13:06,865 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:06,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:06,865 INFO L82 PathProgramCache]: Analyzing trace with hash 894866779, now seen corresponding path program 260 times [2021-10-16 03:13:06,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:06,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470938753] [2021-10-16 03:13:06,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:06,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:06,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:06,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:06,958 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:06,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470938753] [2021-10-16 03:13:06,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470938753] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:06,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:06,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:13:06,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579065315] [2021-10-16 03:13:06,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:13:06,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:06,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:13:06,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:13:06,959 INFO L87 Difference]: Start difference. First operand 1398 states and 4152 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:07,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:07,278 INFO L93 Difference]: Finished difference Result 1520 states and 4387 transitions. [2021-10-16 03:13:07,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-16 03:13:07,278 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:07,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:07,281 INFO L225 Difference]: With dead ends: 1520 [2021-10-16 03:13:07,281 INFO L226 Difference]: Without dead ends: 1512 [2021-10-16 03:13:07,282 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 123.6ms TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-10-16 03:13:07,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1512 states. [2021-10-16 03:13:07,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1512 to 1404. [2021-10-16 03:13:07,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 2.96863863150392) internal successors, (4165), 1403 states have internal predecessors, (4165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:07,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 4165 transitions. [2021-10-16 03:13:07,308 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 4165 transitions. Word has length 38 [2021-10-16 03:13:07,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:07,308 INFO L470 AbstractCegarLoop]: Abstraction has 1404 states and 4165 transitions. [2021-10-16 03:13:07,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:07,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 4165 transitions. [2021-10-16 03:13:07,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:07,310 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:07,310 INFO L512 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] [2021-10-16 03:13:07,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260 [2021-10-16 03:13:07,310 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:07,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:07,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1467898943, now seen corresponding path program 261 times [2021-10-16 03:13:07,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:07,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125308297] [2021-10-16 03:13:07,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:07,311 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:07,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:07,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:07,398 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:07,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125308297] [2021-10-16 03:13:07,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125308297] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:07,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:07,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:13:07,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251163647] [2021-10-16 03:13:07,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:13:07,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:07,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:13:07,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:13:07,400 INFO L87 Difference]: Start difference. First operand 1404 states and 4165 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:07,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:07,676 INFO L93 Difference]: Finished difference Result 1504 states and 4345 transitions. [2021-10-16 03:13:07,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-16 03:13:07,677 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:07,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:07,680 INFO L225 Difference]: With dead ends: 1504 [2021-10-16 03:13:07,680 INFO L226 Difference]: Without dead ends: 1486 [2021-10-16 03:13:07,680 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 104.1ms TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-10-16 03:13:07,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2021-10-16 03:13:07,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 1398. [2021-10-16 03:13:07,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 2.9677881173944165) internal successors, (4146), 1397 states have internal predecessors, (4146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:07,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 4146 transitions. [2021-10-16 03:13:07,706 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 4146 transitions. Word has length 38 [2021-10-16 03:13:07,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:07,706 INFO L470 AbstractCegarLoop]: Abstraction has 1398 states and 4146 transitions. [2021-10-16 03:13:07,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:07,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 4146 transitions. [2021-10-16 03:13:07,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:07,709 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:07,709 INFO L512 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] [2021-10-16 03:13:07,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261 [2021-10-16 03:13:07,709 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:07,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:07,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1001750309, now seen corresponding path program 262 times [2021-10-16 03:13:07,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:07,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309801111] [2021-10-16 03:13:07,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:07,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:07,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:07,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:07,808 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:07,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309801111] [2021-10-16 03:13:07,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309801111] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:07,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:07,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:13:07,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301780604] [2021-10-16 03:13:07,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:13:07,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:07,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:13:07,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:13:07,809 INFO L87 Difference]: Start difference. First operand 1398 states and 4146 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:08,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:08,156 INFO L93 Difference]: Finished difference Result 1512 states and 4367 transitions. [2021-10-16 03:13:08,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-16 03:13:08,156 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:08,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:08,159 INFO L225 Difference]: With dead ends: 1512 [2021-10-16 03:13:08,159 INFO L226 Difference]: Without dead ends: 1496 [2021-10-16 03:13:08,159 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 143.2ms TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-10-16 03:13:08,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-10-16 03:13:08,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 1404. [2021-10-16 03:13:08,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 2.9643620812544547) internal successors, (4159), 1403 states have internal predecessors, (4159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:08,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 4159 transitions. [2021-10-16 03:13:08,185 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 4159 transitions. Word has length 38 [2021-10-16 03:13:08,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:08,185 INFO L470 AbstractCegarLoop]: Abstraction has 1404 states and 4159 transitions. [2021-10-16 03:13:08,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:08,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 4159 transitions. [2021-10-16 03:13:08,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:08,187 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:08,187 INFO L512 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] [2021-10-16 03:13:08,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262 [2021-10-16 03:13:08,187 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:08,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:08,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1560416283, now seen corresponding path program 263 times [2021-10-16 03:13:08,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:08,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856718547] [2021-10-16 03:13:08,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:08,188 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:08,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:08,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:08,301 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:08,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856718547] [2021-10-16 03:13:08,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856718547] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:08,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:08,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:13:08,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686554626] [2021-10-16 03:13:08,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:13:08,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:08,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:13:08,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:13:08,302 INFO L87 Difference]: Start difference. First operand 1404 states and 4159 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:08,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:08,714 INFO L93 Difference]: Finished difference Result 1528 states and 4398 transitions. [2021-10-16 03:13:08,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-16 03:13:08,715 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:08,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:08,717 INFO L225 Difference]: With dead ends: 1528 [2021-10-16 03:13:08,718 INFO L226 Difference]: Without dead ends: 1496 [2021-10-16 03:13:08,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 166.9ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-10-16 03:13:08,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-10-16 03:13:08,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 1392. [2021-10-16 03:13:08,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 2.96980589503954) internal successors, (4131), 1391 states have internal predecessors, (4131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:08,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4131 transitions. [2021-10-16 03:13:08,743 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4131 transitions. Word has length 38 [2021-10-16 03:13:08,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:08,744 INFO L470 AbstractCegarLoop]: Abstraction has 1392 states and 4131 transitions. [2021-10-16 03:13:08,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:08,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4131 transitions. [2021-10-16 03:13:08,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:08,746 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:08,746 INFO L512 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] [2021-10-16 03:13:08,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263 [2021-10-16 03:13:08,746 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:08,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:08,746 INFO L82 PathProgramCache]: Analyzing trace with hash 994984833, now seen corresponding path program 264 times [2021-10-16 03:13:08,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:08,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897846553] [2021-10-16 03:13:08,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:08,747 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:08,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:08,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:08,854 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:08,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897846553] [2021-10-16 03:13:08,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897846553] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:08,854 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:08,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:13:08,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632421598] [2021-10-16 03:13:08,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:13:08,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:08,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:13:08,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:13:08,855 INFO L87 Difference]: Start difference. First operand 1392 states and 4131 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:09,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:09,195 INFO L93 Difference]: Finished difference Result 1502 states and 4336 transitions. [2021-10-16 03:13:09,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-16 03:13:09,196 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:09,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:09,199 INFO L225 Difference]: With dead ends: 1502 [2021-10-16 03:13:09,199 INFO L226 Difference]: Without dead ends: 1494 [2021-10-16 03:13:09,199 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 132.8ms TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-10-16 03:13:09,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2021-10-16 03:13:09,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1404. [2021-10-16 03:13:09,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 2.96863863150392) internal successors, (4165), 1403 states have internal predecessors, (4165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:09,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 4165 transitions. [2021-10-16 03:13:09,224 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 4165 transitions. Word has length 38 [2021-10-16 03:13:09,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:09,224 INFO L470 AbstractCegarLoop]: Abstraction has 1404 states and 4165 transitions. [2021-10-16 03:13:09,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:09,225 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 4165 transitions. [2021-10-16 03:13:09,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:09,227 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:09,227 INFO L512 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] [2021-10-16 03:13:09,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264 [2021-10-16 03:13:09,227 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:09,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:09,227 INFO L82 PathProgramCache]: Analyzing trace with hash 671213, now seen corresponding path program 265 times [2021-10-16 03:13:09,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:09,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175746688] [2021-10-16 03:13:09,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:09,228 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:09,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:09,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:09,335 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:09,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175746688] [2021-10-16 03:13:09,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175746688] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:09,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:09,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:13:09,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066587587] [2021-10-16 03:13:09,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:13:09,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:09,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:13:09,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:13:09,337 INFO L87 Difference]: Start difference. First operand 1404 states and 4165 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:09,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:09,628 INFO L93 Difference]: Finished difference Result 1478 states and 4282 transitions. [2021-10-16 03:13:09,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-16 03:13:09,629 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:09,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:09,631 INFO L225 Difference]: With dead ends: 1478 [2021-10-16 03:13:09,631 INFO L226 Difference]: Without dead ends: 1460 [2021-10-16 03:13:09,632 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 115.4ms TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-10-16 03:13:09,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2021-10-16 03:13:09,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1398. [2021-10-16 03:13:09,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 2.9677881173944165) internal successors, (4146), 1397 states have internal predecessors, (4146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:09,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 4146 transitions. [2021-10-16 03:13:09,655 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 4146 transitions. Word has length 38 [2021-10-16 03:13:09,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:09,656 INFO L470 AbstractCegarLoop]: Abstraction has 1398 states and 4146 transitions. [2021-10-16 03:13:09,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:09,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 4146 transitions. [2021-10-16 03:13:09,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:09,658 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:09,658 INFO L512 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] [2021-10-16 03:13:09,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265 [2021-10-16 03:13:09,658 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:09,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:09,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1646991067, now seen corresponding path program 266 times [2021-10-16 03:13:09,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:09,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373888816] [2021-10-16 03:13:09,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:09,659 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:09,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:09,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:09,763 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:09,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373888816] [2021-10-16 03:13:09,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373888816] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:09,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:09,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:13:09,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300064905] [2021-10-16 03:13:09,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:13:09,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:09,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:13:09,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:13:09,764 INFO L87 Difference]: Start difference. First operand 1398 states and 4146 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:10,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:10,046 INFO L93 Difference]: Finished difference Result 1510 states and 4352 transitions. [2021-10-16 03:13:10,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-16 03:13:10,047 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:10,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:10,050 INFO L225 Difference]: With dead ends: 1510 [2021-10-16 03:13:10,050 INFO L226 Difference]: Without dead ends: 1502 [2021-10-16 03:13:10,050 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 123.7ms TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-10-16 03:13:10,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-10-16 03:13:10,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1400. [2021-10-16 03:13:10,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 1399 states have (on average 2.9656897784131524) internal successors, (4149), 1399 states have internal predecessors, (4149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:10,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 4149 transitions. [2021-10-16 03:13:10,076 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 4149 transitions. Word has length 38 [2021-10-16 03:13:10,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:10,076 INFO L470 AbstractCegarLoop]: Abstraction has 1400 states and 4149 transitions. [2021-10-16 03:13:10,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:10,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 4149 transitions. [2021-10-16 03:13:10,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:10,078 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:10,078 INFO L512 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] [2021-10-16 03:13:10,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266 [2021-10-16 03:13:10,078 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:10,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:10,079 INFO L82 PathProgramCache]: Analyzing trace with hash -524575621, now seen corresponding path program 267 times [2021-10-16 03:13:10,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:10,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674223627] [2021-10-16 03:13:10,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:10,079 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:10,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:10,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:10,183 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:10,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674223627] [2021-10-16 03:13:10,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674223627] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:10,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:10,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:13:10,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783937157] [2021-10-16 03:13:10,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:13:10,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:10,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:13:10,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:13:10,185 INFO L87 Difference]: Start difference. First operand 1400 states and 4149 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:10,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:10,490 INFO L93 Difference]: Finished difference Result 1500 states and 4333 transitions. [2021-10-16 03:13:10,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-16 03:13:10,490 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:10,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:10,493 INFO L225 Difference]: With dead ends: 1500 [2021-10-16 03:13:10,493 INFO L226 Difference]: Without dead ends: 1482 [2021-10-16 03:13:10,493 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 138.6ms TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-10-16 03:13:10,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2021-10-16 03:13:10,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 1398. [2021-10-16 03:13:10,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 2.966356478167502) internal successors, (4144), 1397 states have internal predecessors, (4144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:10,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 4144 transitions. [2021-10-16 03:13:10,519 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 4144 transitions. Word has length 38 [2021-10-16 03:13:10,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:10,519 INFO L470 AbstractCegarLoop]: Abstraction has 1398 states and 4144 transitions. [2021-10-16 03:13:10,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:10,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 4144 transitions. [2021-10-16 03:13:10,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:10,521 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:10,521 INFO L512 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] [2021-10-16 03:13:10,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable267 [2021-10-16 03:13:10,521 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:10,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:10,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1283526769, now seen corresponding path program 268 times [2021-10-16 03:13:10,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:10,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691059032] [2021-10-16 03:13:10,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:10,522 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:10,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:10,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:10,621 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:10,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691059032] [2021-10-16 03:13:10,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691059032] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:10,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:10,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:13:10,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558263504] [2021-10-16 03:13:10,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:13:10,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:10,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:13:10,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:13:10,622 INFO L87 Difference]: Start difference. First operand 1398 states and 4144 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:10,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:10,969 INFO L93 Difference]: Finished difference Result 1488 states and 4303 transitions. [2021-10-16 03:13:10,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-16 03:13:10,969 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:10,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:10,972 INFO L225 Difference]: With dead ends: 1488 [2021-10-16 03:13:10,972 INFO L226 Difference]: Without dead ends: 1472 [2021-10-16 03:13:10,973 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 146.4ms TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-10-16 03:13:10,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2021-10-16 03:13:10,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 1404. [2021-10-16 03:13:10,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 2.962936564504633) internal successors, (4157), 1403 states have internal predecessors, (4157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:10,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 4157 transitions. [2021-10-16 03:13:10,997 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 4157 transitions. Word has length 38 [2021-10-16 03:13:10,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:10,998 INFO L470 AbstractCegarLoop]: Abstraction has 1404 states and 4157 transitions. [2021-10-16 03:13:10,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:10,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 4157 transitions. [2021-10-16 03:13:11,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:11,000 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:11,000 INFO L512 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] [2021-10-16 03:13:11,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable268 [2021-10-16 03:13:11,000 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:11,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:11,000 INFO L82 PathProgramCache]: Analyzing trace with hash 894711461, now seen corresponding path program 269 times [2021-10-16 03:13:11,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:11,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924191799] [2021-10-16 03:13:11,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:11,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:11,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:11,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:11,098 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:11,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924191799] [2021-10-16 03:13:11,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924191799] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:11,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:11,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:13:11,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605280638] [2021-10-16 03:13:11,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:13:11,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:11,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:13:11,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:13:11,099 INFO L87 Difference]: Start difference. First operand 1404 states and 4157 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:11,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:11,451 INFO L93 Difference]: Finished difference Result 1504 states and 4334 transitions. [2021-10-16 03:13:11,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-16 03:13:11,451 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:11,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:11,454 INFO L225 Difference]: With dead ends: 1504 [2021-10-16 03:13:11,454 INFO L226 Difference]: Without dead ends: 1470 [2021-10-16 03:13:11,455 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 141.8ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-10-16 03:13:11,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2021-10-16 03:13:11,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1390. [2021-10-16 03:13:11,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1389 states have (on average 2.970482361411087) internal successors, (4126), 1389 states have internal predecessors, (4126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:11,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 4126 transitions. [2021-10-16 03:13:11,484 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 4126 transitions. Word has length 38 [2021-10-16 03:13:11,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:11,484 INFO L470 AbstractCegarLoop]: Abstraction has 1390 states and 4126 transitions. [2021-10-16 03:13:11,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:11,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 4126 transitions. [2021-10-16 03:13:11,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:11,487 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:11,487 INFO L512 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] [2021-10-16 03:13:11,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269 [2021-10-16 03:13:11,487 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:11,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:11,487 INFO L82 PathProgramCache]: Analyzing trace with hash -358685355, now seen corresponding path program 270 times [2021-10-16 03:13:11,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:11,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888053262] [2021-10-16 03:13:11,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:11,488 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:11,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:11,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:11,600 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:11,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888053262] [2021-10-16 03:13:11,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888053262] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:11,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:11,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:13:11,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999561491] [2021-10-16 03:13:11,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:13:11,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:11,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:13:11,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:13:11,601 INFO L87 Difference]: Start difference. First operand 1390 states and 4126 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:11,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:11,892 INFO L93 Difference]: Finished difference Result 1444 states and 4221 transitions. [2021-10-16 03:13:11,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-16 03:13:11,893 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:11,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:11,896 INFO L225 Difference]: With dead ends: 1444 [2021-10-16 03:13:11,896 INFO L226 Difference]: Without dead ends: 1436 [2021-10-16 03:13:11,896 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 135.7ms TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-10-16 03:13:11,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1436 states. [2021-10-16 03:13:11,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1436 to 1390. [2021-10-16 03:13:11,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1389 states have (on average 2.9690424766018717) internal successors, (4124), 1389 states have internal predecessors, (4124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:11,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 4124 transitions. [2021-10-16 03:13:11,921 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 4124 transitions. Word has length 38 [2021-10-16 03:13:11,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:11,921 INFO L470 AbstractCegarLoop]: Abstraction has 1390 states and 4124 transitions. [2021-10-16 03:13:11,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:11,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 4124 transitions. [2021-10-16 03:13:11,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:11,923 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:11,923 INFO L512 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] [2021-10-16 03:13:11,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270 [2021-10-16 03:13:11,924 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:11,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:11,924 INFO L82 PathProgramCache]: Analyzing trace with hash 2132182193, now seen corresponding path program 271 times [2021-10-16 03:13:11,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:11,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721807900] [2021-10-16 03:13:11,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:11,924 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:11,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:12,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:12,065 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:12,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721807900] [2021-10-16 03:13:12,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721807900] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:12,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:12,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:13:12,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085735695] [2021-10-16 03:13:12,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:13:12,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:12,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:13:12,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:13:12,067 INFO L87 Difference]: Start difference. First operand 1390 states and 4124 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:12,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:12,424 INFO L93 Difference]: Finished difference Result 1442 states and 4220 transitions. [2021-10-16 03:13:12,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-16 03:13:12,424 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:12,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:12,427 INFO L225 Difference]: With dead ends: 1442 [2021-10-16 03:13:12,427 INFO L226 Difference]: Without dead ends: 1424 [2021-10-16 03:13:12,428 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 169.2ms TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-10-16 03:13:12,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2021-10-16 03:13:12,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 1388. [2021-10-16 03:13:12,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1387 states have (on average 2.969718817591925) internal successors, (4119), 1387 states have internal predecessors, (4119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:12,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 4119 transitions. [2021-10-16 03:13:12,453 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 4119 transitions. Word has length 38 [2021-10-16 03:13:12,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:12,453 INFO L470 AbstractCegarLoop]: Abstraction has 1388 states and 4119 transitions. [2021-10-16 03:13:12,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:12,453 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 4119 transitions. [2021-10-16 03:13:12,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:12,455 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:12,455 INFO L512 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] [2021-10-16 03:13:12,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271 [2021-10-16 03:13:12,457 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:12,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:12,457 INFO L82 PathProgramCache]: Analyzing trace with hash -497461365, now seen corresponding path program 272 times [2021-10-16 03:13:12,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:12,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80472603] [2021-10-16 03:13:12,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:12,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:12,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:12,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:12,565 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:12,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80472603] [2021-10-16 03:13:12,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80472603] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:12,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:12,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:13:12,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159980758] [2021-10-16 03:13:12,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:13:12,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:12,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:13:12,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:13:12,567 INFO L87 Difference]: Start difference. First operand 1388 states and 4119 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:12,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:12,899 INFO L93 Difference]: Finished difference Result 1454 states and 4232 transitions. [2021-10-16 03:13:12,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-16 03:13:12,900 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:12,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:12,902 INFO L225 Difference]: With dead ends: 1454 [2021-10-16 03:13:12,902 INFO L226 Difference]: Without dead ends: 1446 [2021-10-16 03:13:12,903 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 133.8ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-10-16 03:13:12,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1446 states. [2021-10-16 03:13:12,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1446 to 1386. [2021-10-16 03:13:12,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 2.9703971119133574) internal successors, (4114), 1385 states have internal predecessors, (4114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:12,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 4114 transitions. [2021-10-16 03:13:12,928 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 4114 transitions. Word has length 38 [2021-10-16 03:13:12,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:12,928 INFO L470 AbstractCegarLoop]: Abstraction has 1386 states and 4114 transitions. [2021-10-16 03:13:12,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:12,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 4114 transitions. [2021-10-16 03:13:12,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:12,931 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:12,931 INFO L512 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] [2021-10-16 03:13:12,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272 [2021-10-16 03:13:12,931 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:12,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:12,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1434740209, now seen corresponding path program 273 times [2021-10-16 03:13:12,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:12,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356268388] [2021-10-16 03:13:12,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:12,932 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:12,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:13,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:13,055 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:13,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356268388] [2021-10-16 03:13:13,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356268388] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:13,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:13,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:13:13,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958803354] [2021-10-16 03:13:13,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:13:13,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:13,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:13:13,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:13:13,056 INFO L87 Difference]: Start difference. First operand 1386 states and 4114 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:13,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:13,373 INFO L93 Difference]: Finished difference Result 1438 states and 4190 transitions. [2021-10-16 03:13:13,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-16 03:13:13,373 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:13,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:13,376 INFO L225 Difference]: With dead ends: 1438 [2021-10-16 03:13:13,376 INFO L226 Difference]: Without dead ends: 1420 [2021-10-16 03:13:13,377 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 124.6ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-10-16 03:13:13,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1420 states. [2021-10-16 03:13:13,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1420 to 1380. [2021-10-16 03:13:13,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 2.969543147208122) internal successors, (4095), 1379 states have internal predecessors, (4095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:13,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 4095 transitions. [2021-10-16 03:13:13,401 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 4095 transitions. Word has length 38 [2021-10-16 03:13:13,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:13,401 INFO L470 AbstractCegarLoop]: Abstraction has 1380 states and 4095 transitions. [2021-10-16 03:13:13,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:13,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 4095 transitions. [2021-10-16 03:13:13,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:13,403 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:13,403 INFO L512 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] [2021-10-16 03:13:13,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273 [2021-10-16 03:13:13,404 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:13,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:13,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1900888843, now seen corresponding path program 274 times [2021-10-16 03:13:13,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:13,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657793430] [2021-10-16 03:13:13,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:13,404 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:13,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:13,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:13,522 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:13,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657793430] [2021-10-16 03:13:13,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657793430] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:13,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:13,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:13:13,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713750743] [2021-10-16 03:13:13,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:13:13,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:13,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:13:13,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:13:13,523 INFO L87 Difference]: Start difference. First operand 1380 states and 4095 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:13,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:13,877 INFO L93 Difference]: Finished difference Result 1446 states and 4212 transitions. [2021-10-16 03:13:13,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-16 03:13:13,877 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:13,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:13,880 INFO L225 Difference]: With dead ends: 1446 [2021-10-16 03:13:13,880 INFO L226 Difference]: Without dead ends: 1430 [2021-10-16 03:13:13,881 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 153.3ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-10-16 03:13:13,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2021-10-16 03:13:13,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 1378. [2021-10-16 03:13:13,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1377 states have (on average 2.9702251270878723) internal successors, (4090), 1377 states have internal predecessors, (4090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:13,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 4090 transitions. [2021-10-16 03:13:13,909 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 4090 transitions. Word has length 38 [2021-10-16 03:13:13,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:13,909 INFO L470 AbstractCegarLoop]: Abstraction has 1378 states and 4090 transitions. [2021-10-16 03:13:13,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:13,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 4090 transitions. [2021-10-16 03:13:13,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:13,911 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:13,911 INFO L512 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] [2021-10-16 03:13:13,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274 [2021-10-16 03:13:13,911 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:13,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:13,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1342222869, now seen corresponding path program 275 times [2021-10-16 03:13:13,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:13,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471414167] [2021-10-16 03:13:13,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:13,912 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:13,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:14,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:14,047 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:14,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471414167] [2021-10-16 03:13:14,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471414167] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:14,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:14,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:13:14,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477229737] [2021-10-16 03:13:14,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:13:14,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:14,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:13:14,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:13:14,048 INFO L87 Difference]: Start difference. First operand 1378 states and 4090 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:14,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:14,427 INFO L93 Difference]: Finished difference Result 1462 states and 4243 transitions. [2021-10-16 03:13:14,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-16 03:13:14,428 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:14,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:14,431 INFO L225 Difference]: With dead ends: 1462 [2021-10-16 03:13:14,431 INFO L226 Difference]: Without dead ends: 1430 [2021-10-16 03:13:14,431 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 158.1ms TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-10-16 03:13:14,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2021-10-16 03:13:14,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 1366. [2021-10-16 03:13:14,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1365 states have (on average 2.975824175824176) internal successors, (4062), 1365 states have internal predecessors, (4062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:14,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 4062 transitions. [2021-10-16 03:13:14,457 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 4062 transitions. Word has length 38 [2021-10-16 03:13:14,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:14,457 INFO L470 AbstractCegarLoop]: Abstraction has 1366 states and 4062 transitions. [2021-10-16 03:13:14,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:14,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 4062 transitions. [2021-10-16 03:13:14,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:14,459 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:14,459 INFO L512 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] [2021-10-16 03:13:14,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275 [2021-10-16 03:13:14,459 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:14,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:14,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1583268659, now seen corresponding path program 276 times [2021-10-16 03:13:14,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:14,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994877341] [2021-10-16 03:13:14,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:14,460 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:14,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:14,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:14,559 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:14,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994877341] [2021-10-16 03:13:14,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994877341] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:14,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:14,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:13:14,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648507440] [2021-10-16 03:13:14,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:13:14,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:14,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:13:14,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:13:14,562 INFO L87 Difference]: Start difference. First operand 1366 states and 4062 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:14,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:14,882 INFO L93 Difference]: Finished difference Result 1410 states and 4142 transitions. [2021-10-16 03:13:14,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-16 03:13:14,883 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:14,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:14,886 INFO L225 Difference]: With dead ends: 1410 [2021-10-16 03:13:14,886 INFO L226 Difference]: Without dead ends: 1402 [2021-10-16 03:13:14,886 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 129.7ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-10-16 03:13:14,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1402 states. [2021-10-16 03:13:14,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1402 to 1362. [2021-10-16 03:13:14,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1362 states, 1361 states have (on average 2.97722263041881) internal successors, (4052), 1361 states have internal predecessors, (4052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:14,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 4052 transitions. [2021-10-16 03:13:14,910 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 4052 transitions. Word has length 38 [2021-10-16 03:13:14,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:14,911 INFO L470 AbstractCegarLoop]: Abstraction has 1362 states and 4052 transitions. [2021-10-16 03:13:14,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:14,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 4052 transitions. [2021-10-16 03:13:14,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:14,913 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:14,913 INFO L512 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] [2021-10-16 03:13:14,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276 [2021-10-16 03:13:14,913 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:14,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:14,913 INFO L82 PathProgramCache]: Analyzing trace with hash -511440951, now seen corresponding path program 277 times [2021-10-16 03:13:14,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:14,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439182750] [2021-10-16 03:13:14,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:14,914 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:14,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:15,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:15,041 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:15,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439182750] [2021-10-16 03:13:15,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439182750] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:15,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:15,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:13:15,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664641826] [2021-10-16 03:13:15,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:13:15,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:15,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:13:15,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:13:15,043 INFO L87 Difference]: Start difference. First operand 1362 states and 4052 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:15,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:15,426 INFO L93 Difference]: Finished difference Result 1408 states and 4135 transitions. [2021-10-16 03:13:15,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-16 03:13:15,427 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:15,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:15,429 INFO L225 Difference]: With dead ends: 1408 [2021-10-16 03:13:15,429 INFO L226 Difference]: Without dead ends: 1400 [2021-10-16 03:13:15,430 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 176.7ms TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-10-16 03:13:15,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-10-16 03:13:15,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1360. [2021-10-16 03:13:15,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1359 states have (on average 2.977924944812362) internal successors, (4047), 1359 states have internal predecessors, (4047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:15,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 4047 transitions. [2021-10-16 03:13:15,455 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 4047 transitions. Word has length 38 [2021-10-16 03:13:15,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:15,455 INFO L470 AbstractCegarLoop]: Abstraction has 1360 states and 4047 transitions. [2021-10-16 03:13:15,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:15,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 4047 transitions. [2021-10-16 03:13:15,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:15,457 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:15,457 INFO L512 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] [2021-10-16 03:13:15,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable277 [2021-10-16 03:13:15,457 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:15,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:15,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1420760623, now seen corresponding path program 278 times [2021-10-16 03:13:15,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:15,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626361122] [2021-10-16 03:13:15,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:15,458 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:15,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:15,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:15,591 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:15,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626361122] [2021-10-16 03:13:15,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626361122] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:15,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:15,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:13:15,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700786293] [2021-10-16 03:13:15,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:13:15,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:15,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:13:15,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:13:15,592 INFO L87 Difference]: Start difference. First operand 1360 states and 4047 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:15,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:15,928 INFO L93 Difference]: Finished difference Result 1388 states and 4087 transitions. [2021-10-16 03:13:15,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-16 03:13:15,928 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:15,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:15,931 INFO L225 Difference]: With dead ends: 1388 [2021-10-16 03:13:15,931 INFO L226 Difference]: Without dead ends: 1370 [2021-10-16 03:13:15,932 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 148.0ms TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-10-16 03:13:15,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1370 states. [2021-10-16 03:13:15,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1370 to 1354. [2021-10-16 03:13:15,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1354 states, 1353 states have (on average 2.9800443458980044) internal successors, (4032), 1353 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:15,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1354 states to 1354 states and 4032 transitions. [2021-10-16 03:13:15,956 INFO L78 Accepts]: Start accepts. Automaton has 1354 states and 4032 transitions. Word has length 38 [2021-10-16 03:13:15,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:15,956 INFO L470 AbstractCegarLoop]: Abstraction has 1354 states and 4032 transitions. [2021-10-16 03:13:15,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:15,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1354 states and 4032 transitions. [2021-10-16 03:13:15,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:15,959 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:15,959 INFO L512 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] [2021-10-16 03:13:15,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable278 [2021-10-16 03:13:15,959 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:15,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:15,959 INFO L82 PathProgramCache]: Analyzing trace with hash 160546261, now seen corresponding path program 279 times [2021-10-16 03:13:15,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:15,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645822274] [2021-10-16 03:13:15,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:15,960 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:15,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:16,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:16,080 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:16,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645822274] [2021-10-16 03:13:16,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645822274] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:16,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:16,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:13:16,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824448782] [2021-10-16 03:13:16,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:13:16,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:16,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:13:16,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:13:16,081 INFO L87 Difference]: Start difference. First operand 1354 states and 4032 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:16,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:16,384 INFO L93 Difference]: Finished difference Result 1386 states and 4078 transitions. [2021-10-16 03:13:16,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-16 03:13:16,384 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:16,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:16,387 INFO L225 Difference]: With dead ends: 1386 [2021-10-16 03:13:16,387 INFO L226 Difference]: Without dead ends: 1370 [2021-10-16 03:13:16,388 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 142.4ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-10-16 03:13:16,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1370 states. [2021-10-16 03:13:16,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1370 to 1352. [2021-10-16 03:13:16,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 2.9807549962990376) internal successors, (4027), 1351 states have internal predecessors, (4027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:16,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 4027 transitions. [2021-10-16 03:13:16,412 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 4027 transitions. Word has length 38 [2021-10-16 03:13:16,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:16,412 INFO L470 AbstractCegarLoop]: Abstraction has 1352 states and 4027 transitions. [2021-10-16 03:13:16,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:16,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 4027 transitions. [2021-10-16 03:13:16,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:16,414 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:16,414 INFO L512 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] [2021-10-16 03:13:16,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable279 [2021-10-16 03:13:16,414 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:16,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:16,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1107735027, now seen corresponding path program 280 times [2021-10-16 03:13:16,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:16,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628969501] [2021-10-16 03:13:16,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:16,415 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:16,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:16,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:16,546 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:16,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628969501] [2021-10-16 03:13:16,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628969501] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:16,546 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:16,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:13:16,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405976916] [2021-10-16 03:13:16,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:13:16,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:16,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:13:16,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:13:16,547 INFO L87 Difference]: Start difference. First operand 1352 states and 4027 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:16,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:16,900 INFO L93 Difference]: Finished difference Result 1372 states and 4059 transitions. [2021-10-16 03:13:16,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-16 03:13:16,901 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:16,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:16,903 INFO L225 Difference]: With dead ends: 1372 [2021-10-16 03:13:16,904 INFO L226 Difference]: Without dead ends: 1354 [2021-10-16 03:13:16,904 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 166.4ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-10-16 03:13:16,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2021-10-16 03:13:16,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1346. [2021-10-16 03:13:16,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1346 states, 1345 states have (on average 2.982899628252788) internal successors, (4012), 1345 states have internal predecessors, (4012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:16,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1346 states to 1346 states and 4012 transitions. [2021-10-16 03:13:16,928 INFO L78 Accepts]: Start accepts. Automaton has 1346 states and 4012 transitions. Word has length 38 [2021-10-16 03:13:16,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:16,928 INFO L470 AbstractCegarLoop]: Abstraction has 1346 states and 4012 transitions. [2021-10-16 03:13:16,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:16,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1346 states and 4012 transitions. [2021-10-16 03:13:16,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:16,930 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:16,930 INFO L512 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] [2021-10-16 03:13:16,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280 [2021-10-16 03:13:16,931 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:16,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:16,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1488949285, now seen corresponding path program 281 times [2021-10-16 03:13:16,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:16,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233121256] [2021-10-16 03:13:16,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:16,931 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:16,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:17,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:17,057 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:17,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233121256] [2021-10-16 03:13:17,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233121256] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:17,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:17,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-16 03:13:17,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924491834] [2021-10-16 03:13:17,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-16 03:13:17,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:17,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-16 03:13:17,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-10-16 03:13:17,058 INFO L87 Difference]: Start difference. First operand 1346 states and 4012 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:17,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:17,425 INFO L93 Difference]: Finished difference Result 1368 states and 4047 transitions. [2021-10-16 03:13:17,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-16 03:13:17,425 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:17,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:17,428 INFO L225 Difference]: With dead ends: 1368 [2021-10-16 03:13:17,428 INFO L226 Difference]: Without dead ends: 1352 [2021-10-16 03:13:17,428 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 195.3ms TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-10-16 03:13:17,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2021-10-16 03:13:17,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1344. [2021-10-16 03:13:17,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 1343 states have (on average 2.983618763961281) internal successors, (4007), 1343 states have internal predecessors, (4007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:17,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 4007 transitions. [2021-10-16 03:13:17,450 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 4007 transitions. Word has length 38 [2021-10-16 03:13:17,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:17,450 INFO L470 AbstractCegarLoop]: Abstraction has 1344 states and 4007 transitions. [2021-10-16 03:13:17,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:17,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 4007 transitions. [2021-10-16 03:13:17,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:17,452 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:17,452 INFO L512 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] [2021-10-16 03:13:17,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281 [2021-10-16 03:13:17,452 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:17,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:17,453 INFO L82 PathProgramCache]: Analyzing trace with hash 930283311, now seen corresponding path program 282 times [2021-10-16 03:13:17,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:17,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003328260] [2021-10-16 03:13:17,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:17,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:17,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:17,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:17,574 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:17,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003328260] [2021-10-16 03:13:17,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003328260] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:17,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:17,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-16 03:13:17,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669466999] [2021-10-16 03:13:17,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-16 03:13:17,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:17,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-16 03:13:17,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-10-16 03:13:17,576 INFO L87 Difference]: Start difference. First operand 1344 states and 4007 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:17,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:17,978 INFO L93 Difference]: Finished difference Result 1404 states and 4124 transitions. [2021-10-16 03:13:17,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-16 03:13:17,979 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:17,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:17,982 INFO L225 Difference]: With dead ends: 1404 [2021-10-16 03:13:17,982 INFO L226 Difference]: Without dead ends: 1378 [2021-10-16 03:13:17,982 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 190.5ms TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-10-16 03:13:17,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1378 states. [2021-10-16 03:13:18,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1378 to 1338. [2021-10-16 03:13:18,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1337 states have (on average 2.985789080029918) internal successors, (3992), 1337 states have internal predecessors, (3992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:18,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 3992 transitions. [2021-10-16 03:13:18,005 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 3992 transitions. Word has length 38 [2021-10-16 03:13:18,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:18,005 INFO L470 AbstractCegarLoop]: Abstraction has 1338 states and 3992 transitions. [2021-10-16 03:13:18,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:18,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 3992 transitions. [2021-10-16 03:13:18,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:18,007 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:18,007 INFO L512 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] [2021-10-16 03:13:18,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282 [2021-10-16 03:13:18,007 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:18,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:18,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1345474353, now seen corresponding path program 283 times [2021-10-16 03:13:18,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:18,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729214887] [2021-10-16 03:13:18,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:18,008 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:18,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:18,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:18,144 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:18,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729214887] [2021-10-16 03:13:18,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729214887] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:18,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:18,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-16 03:13:18,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739536617] [2021-10-16 03:13:18,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-16 03:13:18,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:18,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-16 03:13:18,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-10-16 03:13:18,145 INFO L87 Difference]: Start difference. First operand 1338 states and 3992 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:18,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:18,455 INFO L93 Difference]: Finished difference Result 1326 states and 3960 transitions. [2021-10-16 03:13:18,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-16 03:13:18,455 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:18,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:18,458 INFO L225 Difference]: With dead ends: 1326 [2021-10-16 03:13:18,458 INFO L226 Difference]: Without dead ends: 1300 [2021-10-16 03:13:18,458 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 171.4ms TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-10-16 03:13:18,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2021-10-16 03:13:18,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 1300. [2021-10-16 03:13:18,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 1299 states have (on average 3.0153964588144726) internal successors, (3917), 1299 states have internal predecessors, (3917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:18,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 3917 transitions. [2021-10-16 03:13:18,480 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 3917 transitions. Word has length 38 [2021-10-16 03:13:18,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:18,480 INFO L470 AbstractCegarLoop]: Abstraction has 1300 states and 3917 transitions. [2021-10-16 03:13:18,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:18,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 3917 transitions. [2021-10-16 03:13:18,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:18,482 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:18,483 INFO L512 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] [2021-10-16 03:13:18,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283 [2021-10-16 03:13:18,483 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:18,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:18,483 INFO L82 PathProgramCache]: Analyzing trace with hash -34513417, now seen corresponding path program 284 times [2021-10-16 03:13:18,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:18,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300194754] [2021-10-16 03:13:18,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:18,483 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:18,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:18,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:18,616 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:18,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300194754] [2021-10-16 03:13:18,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300194754] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:18,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:18,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:13:18,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552584070] [2021-10-16 03:13:18,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:13:18,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:18,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:13:18,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:13:18,617 INFO L87 Difference]: Start difference. First operand 1300 states and 3917 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:18,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:18,918 INFO L93 Difference]: Finished difference Result 1354 states and 4012 transitions. [2021-10-16 03:13:18,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-16 03:13:18,918 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:18,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:18,921 INFO L225 Difference]: With dead ends: 1354 [2021-10-16 03:13:18,921 INFO L226 Difference]: Without dead ends: 1346 [2021-10-16 03:13:18,921 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 128.8ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-10-16 03:13:18,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1346 states. [2021-10-16 03:13:18,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1346 to 1300. [2021-10-16 03:13:18,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 1299 states have (on average 3.0138568129330254) internal successors, (3915), 1299 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:18,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 3915 transitions. [2021-10-16 03:13:18,944 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 3915 transitions. Word has length 38 [2021-10-16 03:13:18,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:18,945 INFO L470 AbstractCegarLoop]: Abstraction has 1300 states and 3915 transitions. [2021-10-16 03:13:18,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:18,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 3915 transitions. [2021-10-16 03:13:18,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:18,946 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:18,947 INFO L512 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] [2021-10-16 03:13:18,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284 [2021-10-16 03:13:18,947 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:18,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:18,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1028827037, now seen corresponding path program 285 times [2021-10-16 03:13:18,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:18,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957911852] [2021-10-16 03:13:18,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:18,947 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:18,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:19,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:19,066 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:19,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957911852] [2021-10-16 03:13:19,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957911852] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:19,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:19,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:13:19,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140088268] [2021-10-16 03:13:19,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:13:19,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:19,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:13:19,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:13:19,067 INFO L87 Difference]: Start difference. First operand 1300 states and 3915 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:19,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:19,323 INFO L93 Difference]: Finished difference Result 1330 states and 3958 transitions. [2021-10-16 03:13:19,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-16 03:13:19,324 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:19,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:19,327 INFO L225 Difference]: With dead ends: 1330 [2021-10-16 03:13:19,327 INFO L226 Difference]: Without dead ends: 1312 [2021-10-16 03:13:19,327 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 121.0ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-10-16 03:13:19,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2021-10-16 03:13:19,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 1294. [2021-10-16 03:13:19,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 1293 states have (on average 3.0131477184841455) internal successors, (3896), 1293 states have internal predecessors, (3896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:19,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 3896 transitions. [2021-10-16 03:13:19,349 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 3896 transitions. Word has length 38 [2021-10-16 03:13:19,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:19,349 INFO L470 AbstractCegarLoop]: Abstraction has 1294 states and 3896 transitions. [2021-10-16 03:13:19,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:19,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 3896 transitions. [2021-10-16 03:13:19,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:19,351 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:19,351 INFO L512 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] [2021-10-16 03:13:19,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285 [2021-10-16 03:13:19,352 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:19,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:19,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1618477979, now seen corresponding path program 286 times [2021-10-16 03:13:19,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:19,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868285710] [2021-10-16 03:13:19,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:19,352 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:19,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:19,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:19,484 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:19,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868285710] [2021-10-16 03:13:19,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868285710] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:19,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:19,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:13:19,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398327926] [2021-10-16 03:13:19,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:13:19,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:19,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:13:19,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:13:19,486 INFO L87 Difference]: Start difference. First operand 1294 states and 3896 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:19,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:19,742 INFO L93 Difference]: Finished difference Result 1338 states and 3976 transitions. [2021-10-16 03:13:19,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-16 03:13:19,743 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:19,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:19,746 INFO L225 Difference]: With dead ends: 1338 [2021-10-16 03:13:19,746 INFO L226 Difference]: Without dead ends: 1330 [2021-10-16 03:13:19,746 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 128.8ms TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-10-16 03:13:19,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1330 states. [2021-10-16 03:13:19,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1330 to 1292. [2021-10-16 03:13:19,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 3.0139426800929514) internal successors, (3891), 1291 states have internal predecessors, (3891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:19,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 3891 transitions. [2021-10-16 03:13:19,768 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 3891 transitions. Word has length 38 [2021-10-16 03:13:19,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:19,768 INFO L470 AbstractCegarLoop]: Abstraction has 1292 states and 3891 transitions. [2021-10-16 03:13:19,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:19,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 3891 transitions. [2021-10-16 03:13:19,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:19,770 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:19,770 INFO L512 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] [2021-10-16 03:13:19,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286 [2021-10-16 03:13:19,770 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:19,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:19,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1554073871, now seen corresponding path program 287 times [2021-10-16 03:13:19,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:19,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099998487] [2021-10-16 03:13:19,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:19,771 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:19,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:19,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:19,877 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:19,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099998487] [2021-10-16 03:13:19,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099998487] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:19,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:19,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:13:19,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325334441] [2021-10-16 03:13:19,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:13:19,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:19,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:13:19,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:13:19,878 INFO L87 Difference]: Start difference. First operand 1292 states and 3891 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:20,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:20,150 INFO L93 Difference]: Finished difference Result 1344 states and 3987 transitions. [2021-10-16 03:13:20,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-16 03:13:20,151 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:20,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:20,153 INFO L225 Difference]: With dead ends: 1344 [2021-10-16 03:13:20,154 INFO L226 Difference]: Without dead ends: 1326 [2021-10-16 03:13:20,154 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 148.6ms TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-10-16 03:13:20,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2021-10-16 03:13:20,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 1290. [2021-10-16 03:13:20,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1290 states, 1289 states have (on average 3.014740108611327) internal successors, (3886), 1289 states have internal predecessors, (3886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:20,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 3886 transitions. [2021-10-16 03:13:20,176 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 3886 transitions. Word has length 38 [2021-10-16 03:13:20,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:20,176 INFO L470 AbstractCegarLoop]: Abstraction has 1290 states and 3886 transitions. [2021-10-16 03:13:20,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:20,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 3886 transitions. [2021-10-16 03:13:20,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:20,178 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:20,178 INFO L512 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] [2021-10-16 03:13:20,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable287 [2021-10-16 03:13:20,178 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:20,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:20,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1981942277, now seen corresponding path program 288 times [2021-10-16 03:13:20,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:20,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664288008] [2021-10-16 03:13:20,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:20,179 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:20,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:20,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:20,275 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:20,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664288008] [2021-10-16 03:13:20,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664288008] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:20,275 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:20,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:13:20,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785331739] [2021-10-16 03:13:20,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:13:20,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:20,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:13:20,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:13:20,276 INFO L87 Difference]: Start difference. First operand 1290 states and 3886 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:20,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:20,573 INFO L93 Difference]: Finished difference Result 1348 states and 3991 transitions. [2021-10-16 03:13:20,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-16 03:13:20,573 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:20,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:20,575 INFO L225 Difference]: With dead ends: 1348 [2021-10-16 03:13:20,576 INFO L226 Difference]: Without dead ends: 1332 [2021-10-16 03:13:20,576 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 140.0ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-10-16 03:13:20,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2021-10-16 03:13:20,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 1288. [2021-10-16 03:13:20,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 3.0155400155400156) internal successors, (3881), 1287 states have internal predecessors, (3881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:20,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 3881 transitions. [2021-10-16 03:13:20,598 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 3881 transitions. Word has length 38 [2021-10-16 03:13:20,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:20,598 INFO L470 AbstractCegarLoop]: Abstraction has 1288 states and 3881 transitions. [2021-10-16 03:13:20,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:20,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 3881 transitions. [2021-10-16 03:13:20,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:20,600 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:20,600 INFO L512 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] [2021-10-16 03:13:20,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable288 [2021-10-16 03:13:20,600 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:20,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:20,601 INFO L82 PathProgramCache]: Analyzing trace with hash -134786789, now seen corresponding path program 289 times [2021-10-16 03:13:20,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:20,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217423352] [2021-10-16 03:13:20,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:20,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:20,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:20,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:20,697 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:20,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217423352] [2021-10-16 03:13:20,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217423352] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:20,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:20,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:13:20,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295614105] [2021-10-16 03:13:20,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:13:20,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:20,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:13:20,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:13:20,698 INFO L87 Difference]: Start difference. First operand 1288 states and 3881 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:20,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:20,953 INFO L93 Difference]: Finished difference Result 1364 states and 4022 transitions. [2021-10-16 03:13:20,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-16 03:13:20,953 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:20,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:20,955 INFO L225 Difference]: With dead ends: 1364 [2021-10-16 03:13:20,955 INFO L226 Difference]: Without dead ends: 1332 [2021-10-16 03:13:20,956 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 113.3ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-10-16 03:13:20,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2021-10-16 03:13:20,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 1276. [2021-10-16 03:13:20,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1276 states, 1275 states have (on average 3.0219607843137255) internal successors, (3853), 1275 states have internal predecessors, (3853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:20,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 3853 transitions. [2021-10-16 03:13:20,977 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 3853 transitions. Word has length 38 [2021-10-16 03:13:20,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:20,977 INFO L470 AbstractCegarLoop]: Abstraction has 1276 states and 3853 transitions. [2021-10-16 03:13:20,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:20,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 3853 transitions. [2021-10-16 03:13:20,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:20,979 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:20,979 INFO L512 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] [2021-10-16 03:13:20,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable289 [2021-10-16 03:13:20,979 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:20,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:20,980 INFO L82 PathProgramCache]: Analyzing trace with hash 58233013, now seen corresponding path program 290 times [2021-10-16 03:13:20,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:20,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362600459] [2021-10-16 03:13:20,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:20,980 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:20,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:21,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:21,065 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:21,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362600459] [2021-10-16 03:13:21,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362600459] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:21,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:21,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:13:21,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032585497] [2021-10-16 03:13:21,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:13:21,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:21,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:13:21,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:13:21,066 INFO L87 Difference]: Start difference. First operand 1276 states and 3853 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:21,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:21,304 INFO L93 Difference]: Finished difference Result 1312 states and 3921 transitions. [2021-10-16 03:13:21,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-16 03:13:21,305 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:21,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:21,307 INFO L225 Difference]: With dead ends: 1312 [2021-10-16 03:13:21,307 INFO L226 Difference]: Without dead ends: 1304 [2021-10-16 03:13:21,307 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 110.7ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-10-16 03:13:21,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2021-10-16 03:13:21,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 1272. [2021-10-16 03:13:21,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 1271 states have (on average 3.02360346184107) internal successors, (3843), 1271 states have internal predecessors, (3843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:21,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 3843 transitions. [2021-10-16 03:13:21,328 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 3843 transitions. Word has length 38 [2021-10-16 03:13:21,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:21,328 INFO L470 AbstractCegarLoop]: Abstraction has 1272 states and 3843 transitions. [2021-10-16 03:13:21,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:21,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 3843 transitions. [2021-10-16 03:13:21,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:21,329 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:21,330 INFO L512 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] [2021-10-16 03:13:21,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290 [2021-10-16 03:13:21,330 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:21,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:21,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1049258553, now seen corresponding path program 291 times [2021-10-16 03:13:21,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:21,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867084171] [2021-10-16 03:13:21,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:21,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:21,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:21,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:21,425 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:21,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867084171] [2021-10-16 03:13:21,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867084171] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:21,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:21,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:13:21,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652400875] [2021-10-16 03:13:21,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:13:21,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:21,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:13:21,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:13:21,426 INFO L87 Difference]: Start difference. First operand 1272 states and 3843 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:21,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:21,724 INFO L93 Difference]: Finished difference Result 1310 states and 3914 transitions. [2021-10-16 03:13:21,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-16 03:13:21,725 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:21,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:21,728 INFO L225 Difference]: With dead ends: 1310 [2021-10-16 03:13:21,728 INFO L226 Difference]: Without dead ends: 1302 [2021-10-16 03:13:21,728 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 142.1ms TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-10-16 03:13:21,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2021-10-16 03:13:21,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 1270. [2021-10-16 03:13:21,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1269 states have (on average 3.0244286840031522) internal successors, (3838), 1269 states have internal predecessors, (3838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:21,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 3838 transitions. [2021-10-16 03:13:21,750 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 3838 transitions. Word has length 38 [2021-10-16 03:13:21,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:21,750 INFO L470 AbstractCegarLoop]: Abstraction has 1270 states and 3838 transitions. [2021-10-16 03:13:21,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:21,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 3838 transitions. [2021-10-16 03:13:21,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:21,752 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:21,752 INFO L512 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] [2021-10-16 03:13:21,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291 [2021-10-16 03:13:21,752 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:21,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:21,752 INFO L82 PathProgramCache]: Analyzing trace with hash -2043572173, now seen corresponding path program 292 times [2021-10-16 03:13:21,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:21,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625035542] [2021-10-16 03:13:21,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:21,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:21,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:21,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:21,863 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:21,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625035542] [2021-10-16 03:13:21,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625035542] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:21,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:21,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:13:21,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887055027] [2021-10-16 03:13:21,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:13:21,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:21,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:13:21,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:13:21,864 INFO L87 Difference]: Start difference. First operand 1270 states and 3838 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:22,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:22,099 INFO L93 Difference]: Finished difference Result 1282 states and 3854 transitions. [2021-10-16 03:13:22,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-16 03:13:22,100 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:22,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:22,103 INFO L225 Difference]: With dead ends: 1282 [2021-10-16 03:13:22,103 INFO L226 Difference]: Without dead ends: 1264 [2021-10-16 03:13:22,103 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 124.6ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-10-16 03:13:22,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2021-10-16 03:13:22,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 1264. [2021-10-16 03:13:22,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 1263 states have (on average 3.0269200316706253) internal successors, (3823), 1263 states have internal predecessors, (3823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:22,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 3823 transitions. [2021-10-16 03:13:22,125 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 3823 transitions. Word has length 38 [2021-10-16 03:13:22,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:22,126 INFO L470 AbstractCegarLoop]: Abstraction has 1264 states and 3823 transitions. [2021-10-16 03:13:22,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:22,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 3823 transitions. [2021-10-16 03:13:22,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:22,127 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:22,128 INFO L512 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] [2021-10-16 03:13:22,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292 [2021-10-16 03:13:22,128 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:22,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:22,128 INFO L82 PathProgramCache]: Analyzing trace with hash -463195237, now seen corresponding path program 293 times [2021-10-16 03:13:22,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:22,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438792583] [2021-10-16 03:13:22,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:22,128 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:22,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:22,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:22,242 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:22,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438792583] [2021-10-16 03:13:22,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438792583] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:22,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:22,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:13:22,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217619456] [2021-10-16 03:13:22,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:13:22,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:22,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:13:22,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:13:22,243 INFO L87 Difference]: Start difference. First operand 1264 states and 3823 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:22,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:22,465 INFO L93 Difference]: Finished difference Result 1278 states and 3842 transitions. [2021-10-16 03:13:22,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-16 03:13:22,465 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:22,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:22,468 INFO L225 Difference]: With dead ends: 1278 [2021-10-16 03:13:22,468 INFO L226 Difference]: Without dead ends: 1262 [2021-10-16 03:13:22,468 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 128.2ms TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-10-16 03:13:22,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2021-10-16 03:13:22,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 1262. [2021-10-16 03:13:22,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 3.027755749405234) internal successors, (3818), 1261 states have internal predecessors, (3818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:22,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 3818 transitions. [2021-10-16 03:13:22,489 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 3818 transitions. Word has length 38 [2021-10-16 03:13:22,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:22,489 INFO L470 AbstractCegarLoop]: Abstraction has 1262 states and 3818 transitions. [2021-10-16 03:13:22,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:22,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 3818 transitions. [2021-10-16 03:13:22,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:22,491 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:22,491 INFO L512 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] [2021-10-16 03:13:22,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293 [2021-10-16 03:13:22,491 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:22,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:22,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1589133887, now seen corresponding path program 294 times [2021-10-16 03:13:22,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:22,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109564135] [2021-10-16 03:13:22,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:22,492 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:22,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:22,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:22,614 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:22,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109564135] [2021-10-16 03:13:22,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109564135] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:22,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:22,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-16 03:13:22,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471357143] [2021-10-16 03:13:22,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-16 03:13:22,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:22,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-16 03:13:22,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-10-16 03:13:22,615 INFO L87 Difference]: Start difference. First operand 1262 states and 3818 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:22,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:22,943 INFO L93 Difference]: Finished difference Result 1324 states and 3938 transitions. [2021-10-16 03:13:22,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-16 03:13:22,943 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:22,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:22,946 INFO L225 Difference]: With dead ends: 1324 [2021-10-16 03:13:22,946 INFO L226 Difference]: Without dead ends: 1304 [2021-10-16 03:13:22,946 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 150.1ms TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-10-16 03:13:22,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2021-10-16 03:13:22,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 1262. [2021-10-16 03:13:22,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 3.022997620935765) internal successors, (3812), 1261 states have internal predecessors, (3812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:22,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 3812 transitions. [2021-10-16 03:13:22,968 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 3812 transitions. Word has length 38 [2021-10-16 03:13:22,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:22,968 INFO L470 AbstractCegarLoop]: Abstraction has 1262 states and 3812 transitions. [2021-10-16 03:13:22,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:22,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 3812 transitions. [2021-10-16 03:13:22,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:22,971 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:22,971 INFO L512 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] [2021-10-16 03:13:22,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294 [2021-10-16 03:13:22,972 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:22,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:22,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1001856043, now seen corresponding path program 295 times [2021-10-16 03:13:22,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:22,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847790949] [2021-10-16 03:13:22,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:22,973 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:23,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:23,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:23,102 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:23,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847790949] [2021-10-16 03:13:23,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847790949] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:23,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:23,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-16 03:13:23,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150732081] [2021-10-16 03:13:23,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:13:23,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:23,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:13:23,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:13:23,103 INFO L87 Difference]: Start difference. First operand 1262 states and 3812 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:23,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:23,375 INFO L93 Difference]: Finished difference Result 1276 states and 3835 transitions. [2021-10-16 03:13:23,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-16 03:13:23,376 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:23,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:23,378 INFO L225 Difference]: With dead ends: 1276 [2021-10-16 03:13:23,378 INFO L226 Difference]: Without dead ends: 1258 [2021-10-16 03:13:23,379 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 139.9ms TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-10-16 03:13:23,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2021-10-16 03:13:23,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 1256. [2021-10-16 03:13:23,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1256 states, 1255 states have (on average 3.0254980079681273) internal successors, (3797), 1255 states have internal predecessors, (3797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:23,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 3797 transitions. [2021-10-16 03:13:23,400 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 3797 transitions. Word has length 38 [2021-10-16 03:13:23,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:23,400 INFO L470 AbstractCegarLoop]: Abstraction has 1256 states and 3797 transitions. [2021-10-16 03:13:23,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:23,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 3797 transitions. [2021-10-16 03:13:23,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:23,402 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:23,402 INFO L512 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] [2021-10-16 03:13:23,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295 [2021-10-16 03:13:23,402 INFO L402 AbstractCegarLoop]: === Iteration 297 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:23,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:23,403 INFO L82 PathProgramCache]: Analyzing trace with hash -565980259, now seen corresponding path program 296 times [2021-10-16 03:13:23,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:23,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734392092] [2021-10-16 03:13:23,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:23,403 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:23,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:23,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:23,524 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:23,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734392092] [2021-10-16 03:13:23,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734392092] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:23,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:23,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-16 03:13:23,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176235761] [2021-10-16 03:13:23,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-16 03:13:23,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:23,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-16 03:13:23,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-10-16 03:13:23,525 INFO L87 Difference]: Start difference. First operand 1256 states and 3797 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:23,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:23,807 INFO L93 Difference]: Finished difference Result 1270 states and 3820 transitions. [2021-10-16 03:13:23,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-16 03:13:23,807 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:23,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:23,809 INFO L225 Difference]: With dead ends: 1270 [2021-10-16 03:13:23,809 INFO L226 Difference]: Without dead ends: 1248 [2021-10-16 03:13:23,809 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 152.0ms TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-10-16 03:13:23,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-10-16 03:13:23,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1248. [2021-10-16 03:13:23,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1247 states have (on average 3.0336808340016037) internal successors, (3783), 1247 states have internal predecessors, (3783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:23,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 3783 transitions. [2021-10-16 03:13:23,828 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 3783 transitions. Word has length 38 [2021-10-16 03:13:23,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:23,828 INFO L470 AbstractCegarLoop]: Abstraction has 1248 states and 3783 transitions. [2021-10-16 03:13:23,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:23,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 3783 transitions. [2021-10-16 03:13:23,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:23,830 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:23,830 INFO L512 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] [2021-10-16 03:13:23,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296 [2021-10-16 03:13:23,830 INFO L402 AbstractCegarLoop]: === Iteration 298 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:23,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:23,830 INFO L82 PathProgramCache]: Analyzing trace with hash 594889713, now seen corresponding path program 297 times [2021-10-16 03:13:23,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:23,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41704163] [2021-10-16 03:13:23,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:23,831 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:23,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:23,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:23,953 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:23,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41704163] [2021-10-16 03:13:23,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41704163] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:23,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:23,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-16 03:13:23,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555055056] [2021-10-16 03:13:23,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-16 03:13:23,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:23,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-16 03:13:23,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-10-16 03:13:23,955 INFO L87 Difference]: Start difference. First operand 1248 states and 3783 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:24,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:24,176 INFO L93 Difference]: Finished difference Result 1230 states and 3742 transitions. [2021-10-16 03:13:24,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-16 03:13:24,176 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:24,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:24,179 INFO L225 Difference]: With dead ends: 1230 [2021-10-16 03:13:24,179 INFO L226 Difference]: Without dead ends: 1196 [2021-10-16 03:13:24,179 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 142.5ms TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-10-16 03:13:24,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-10-16 03:13:24,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 1196. [2021-10-16 03:13:24,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1196 states, 1195 states have (on average 3.0853556485355647) internal successors, (3687), 1195 states have internal predecessors, (3687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:24,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1196 states to 1196 states and 3687 transitions. [2021-10-16 03:13:24,201 INFO L78 Accepts]: Start accepts. Automaton has 1196 states and 3687 transitions. Word has length 38 [2021-10-16 03:13:24,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:24,201 INFO L470 AbstractCegarLoop]: Abstraction has 1196 states and 3687 transitions. [2021-10-16 03:13:24,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:24,201 INFO L276 IsEmpty]: Start isEmpty. Operand 1196 states and 3687 transitions. [2021-10-16 03:13:24,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:24,203 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:24,203 INFO L512 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] [2021-10-16 03:13:24,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297 [2021-10-16 03:13:24,203 INFO L402 AbstractCegarLoop]: === Iteration 299 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:24,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:24,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1270181275, now seen corresponding path program 298 times [2021-10-16 03:13:24,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:24,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616888999] [2021-10-16 03:13:24,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:24,204 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:24,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:24,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:24,296 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:24,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616888999] [2021-10-16 03:13:24,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616888999] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:24,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:24,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-16 03:13:24,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404702885] [2021-10-16 03:13:24,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 03:13:24,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:24,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 03:13:24,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:13:24,297 INFO L87 Difference]: Start difference. First operand 1196 states and 3687 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:24,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:24,504 INFO L93 Difference]: Finished difference Result 1510 states and 4550 transitions. [2021-10-16 03:13:24,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-16 03:13:24,504 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:24,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:24,507 INFO L225 Difference]: With dead ends: 1510 [2021-10-16 03:13:24,507 INFO L226 Difference]: Without dead ends: 1348 [2021-10-16 03:13:24,507 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 74.6ms TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-10-16 03:13:24,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1348 states. [2021-10-16 03:13:24,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1348 to 1340. [2021-10-16 03:13:24,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1340 states, 1339 states have (on average 3.026138909634055) internal successors, (4052), 1339 states have internal predecessors, (4052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:24,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 4052 transitions. [2021-10-16 03:13:24,529 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 4052 transitions. Word has length 38 [2021-10-16 03:13:24,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:24,529 INFO L470 AbstractCegarLoop]: Abstraction has 1340 states and 4052 transitions. [2021-10-16 03:13:24,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:24,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 4052 transitions. [2021-10-16 03:13:24,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:24,531 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:24,532 INFO L512 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] [2021-10-16 03:13:24,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298 [2021-10-16 03:13:24,532 INFO L402 AbstractCegarLoop]: === Iteration 300 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:24,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:24,532 INFO L82 PathProgramCache]: Analyzing trace with hash 327842679, now seen corresponding path program 299 times [2021-10-16 03:13:24,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:24,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701319932] [2021-10-16 03:13:24,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:24,532 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:24,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:24,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:24,624 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:24,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701319932] [2021-10-16 03:13:24,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701319932] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:24,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:24,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-16 03:13:24,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066140978] [2021-10-16 03:13:24,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:13:24,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:24,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:13:24,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:13:24,625 INFO L87 Difference]: Start difference. First operand 1340 states and 4052 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:24,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:24,825 INFO L93 Difference]: Finished difference Result 1586 states and 4687 transitions. [2021-10-16 03:13:24,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-16 03:13:24,825 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:24,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:24,828 INFO L225 Difference]: With dead ends: 1586 [2021-10-16 03:13:24,828 INFO L226 Difference]: Without dead ends: 1470 [2021-10-16 03:13:24,828 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 79.1ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-10-16 03:13:24,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2021-10-16 03:13:24,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1440. [2021-10-16 03:13:24,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1439 states have (on average 2.9784572619874914) internal successors, (4286), 1439 states have internal predecessors, (4286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:24,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 4286 transitions. [2021-10-16 03:13:24,852 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 4286 transitions. Word has length 38 [2021-10-16 03:13:24,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:24,852 INFO L470 AbstractCegarLoop]: Abstraction has 1440 states and 4286 transitions. [2021-10-16 03:13:24,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:24,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 4286 transitions. [2021-10-16 03:13:24,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 03:13:24,854 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:24,854 INFO L512 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] [2021-10-16 03:13:24,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299 [2021-10-16 03:13:24,855 INFO L402 AbstractCegarLoop]: === Iteration 301 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:13:24,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:24,855 INFO L82 PathProgramCache]: Analyzing trace with hash -83790857, now seen corresponding path program 300 times [2021-10-16 03:13:24,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:24,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540031957] [2021-10-16 03:13:24,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:24,855 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:24,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:24,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:24,977 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:24,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540031957] [2021-10-16 03:13:24,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540031957] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:24,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:24,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-16 03:13:24,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718633073] [2021-10-16 03:13:24,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 03:13:24,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:24,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 03:13:24,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-16 03:13:24,978 INFO L87 Difference]: Start difference. First operand 1440 states and 4286 transitions. Second operand has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:25,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:25,077 INFO L93 Difference]: Finished difference Result 1439 states and 4285 transitions. [2021-10-16 03:13:25,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 03:13:25,078 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-16 03:13:25,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:25,078 INFO L225 Difference]: With dead ends: 1439 [2021-10-16 03:13:25,078 INFO L226 Difference]: Without dead ends: 0 [2021-10-16 03:13:25,078 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 63.9ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:13:25,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-16 03:13:25,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-16 03:13:25,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:25,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-16 03:13:25,079 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2021-10-16 03:13:25,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:25,079 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-16 03:13:25,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:25,079 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-16 03:13:25,079 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-16 03:13:25,081 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 03:13:25,082 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-16 03:13:25,082 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-16 03:13:25,082 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-16 03:13:25,082 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3INUSE_VIOLATION [2021-10-16 03:13:25,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable300 [2021-10-16 03:13:25,086 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-16 03:13:25,087 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 03:13:25,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 03:13:25 BasicIcfg [2021-10-16 03:13:25,089 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 03:13:25,089 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 03:13:25,090 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 03:13:25,090 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 03:13:25,091 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:09:19" (3/4) ... [2021-10-16 03:13:25,094 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-16 03:13:25,101 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-16 03:13:25,102 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-16 03:13:25,102 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread3 [2021-10-16 03:13:25,102 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread4 [2021-10-16 03:13:25,108 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2021-10-16 03:13:25,109 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-16 03:13:25,109 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-16 03:13:25,110 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-16 03:13:25,151 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7c4b2b-631d-432f-9931-518d2caba58a/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 03:13:25,152 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 03:13:25,154 INFO L168 Benchmark]: Toolchain (without parser) took 247019.47 ms. Allocated memory was 98.6 MB in the beginning and 1.3 GB in the end (delta: 1.2 GB). Free memory was 64.1 MB in the beginning and 1.0 GB in the end (delta: -961.3 MB). Peak memory consumption was 270.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:13:25,154 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 98.6 MB. Free memory is still 53.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:13:25,155 INFO L168 Benchmark]: CACSL2BoogieTranslator took 362.43 ms. Allocated memory was 98.6 MB in the beginning and 130.0 MB in the end (delta: 31.5 MB). Free memory was 64.1 MB in the beginning and 103.0 MB in the end (delta: -38.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 03:13:25,155 INFO L168 Benchmark]: Boogie Procedure Inliner took 60.82 ms. Allocated memory is still 130.0 MB. Free memory was 103.0 MB in the beginning and 100.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:13:25,156 INFO L168 Benchmark]: Boogie Preprocessor took 52.98 ms. Allocated memory is still 130.0 MB. Free memory was 100.9 MB in the beginning and 99.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:13:25,156 INFO L168 Benchmark]: RCFGBuilder took 702.96 ms. Allocated memory is still 130.0 MB. Free memory was 99.4 MB in the beginning and 83.3 MB in the end (delta: 16.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-16 03:13:25,157 INFO L168 Benchmark]: TraceAbstraction took 245762.22 ms. Allocated memory was 130.0 MB in the beginning and 1.3 GB in the end (delta: 1.2 GB). Free memory was 82.7 MB in the beginning and 1.0 GB in the end (delta: -945.9 MB). Peak memory consumption was 254.3 MB. Max. memory is 16.1 GB. [2021-10-16 03:13:25,157 INFO L168 Benchmark]: Witness Printer took 62.29 ms. Allocated memory is still 1.3 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-16 03:13:25,160 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 98.6 MB. Free memory is still 53.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 362.43 ms. Allocated memory was 98.6 MB in the beginning and 130.0 MB in the end (delta: 31.5 MB). Free memory was 64.1 MB in the beginning and 103.0 MB in the end (delta: -38.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 60.82 ms. Allocated memory is still 130.0 MB. Free memory was 103.0 MB in the beginning and 100.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 52.98 ms. Allocated memory is still 130.0 MB. Free memory was 100.9 MB in the beginning and 99.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 702.96 ms. Allocated memory is still 130.0 MB. Free memory was 99.4 MB in the beginning and 83.3 MB in the end (delta: 16.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 245762.22 ms. Allocated memory was 130.0 MB in the beginning and 1.3 GB in the end (delta: 1.2 GB). Free memory was 82.7 MB in the beginning and 1.0 GB in the end (delta: -945.9 MB). Peak memory consumption was 254.3 MB. Max. memory is 16.1 GB. * Witness Printer took 62.29 ms. Allocated memory is still 1.3 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 8209.4ms, 169 PlacesBefore, 56 PlacesAfterwards, 162 TransitionsBefore, 46 TransitionsAfterwards, 3864 CoEnabledTransitionPairs, 7 FixpointIterations, 73 TrivialSequentialCompositions, 53 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 14 ConcurrentYvCompositions, 3 ChoiceCompositions, 145 TotalNumberOfCompositions, 12207 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 5984, positive: 5715, positive conditional: 0, positive unconditional: 5715, negative: 269, negative conditional: 0, negative unconditional: 269, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 2990, positive: 2912, positive conditional: 0, positive unconditional: 2912, negative: 78, negative conditional: 0, negative unconditional: 78, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 2990, positive: 2792, positive conditional: 0, positive unconditional: 2792, negative: 198, negative conditional: 0, negative unconditional: 198, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 198, positive: 120, positive conditional: 0, positive unconditional: 120, negative: 78, negative conditional: 0, negative unconditional: 78, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 287, positive: 143, positive conditional: 0, positive unconditional: 143, negative: 144, negative conditional: 0, negative unconditional: 144, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 5984, positive: 2803, positive conditional: 0, positive unconditional: 2803, negative: 191, negative conditional: 0, negative unconditional: 191, unknown: 2990, unknown conditional: 0, unknown unconditional: 2990] , Statistics on independence cache: Total cache size (in pairs): 371, Positive cache size: 339, Positive conditional cache size: 0, Positive unconditional cache size: 339, Negative cache size: 32, Negative conditional cache size: 0, Negative unconditional cache size: 32 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 120]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 214 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 245438.6ms, OverallIterations: 301, TraceHistogramMax: 1, EmptinessCheckTime: 1845.1ms, AutomataDifference: 170957.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8591.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 29348 SDtfs, 42922 SDslu, 166386 SDs, 0 SdLazy, 166182 SolverSat, 10970 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 86723.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7649 GetRequests, 586 SyntacticMatches, 0 SemanticMatches, 7063 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35970 ImplicationChecksByTransitivity, 64292.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=6226occurred in iteration=11, InterpolantAutomatonStates: 6692, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 24578.0ms AutomataMinimizationTime, 301 MinimizatonAttempts, 278748 StatesRemovedByMinimization, 293 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 550.7ms SsaConstructionTime, 6585.5ms SatisfiabilityAnalysisTime, 30156.3ms InterpolantComputationTime, 11425 NumberOfCodeBlocks, 11425 NumberOfCodeBlocksAsserted, 301 NumberOfCheckSat, 11124 ConstructedInterpolants, 0 QuantifiedInterpolants, 51779 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 301 InterpolantComputations, 301 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-16 03:13:25,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7c4b2b-631d-432f-9931-518d2caba58a/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...