./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cedecf19-8ab1-424b-9b52-15e464fff246/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cedecf19-8ab1-424b-9b52-15e464fff246/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cedecf19-8ab1-424b-9b52-15e464fff246/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cedecf19-8ab1-424b-9b52-15e464fff246/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cedecf19-8ab1-424b-9b52-15e464fff246/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cedecf19-8ab1-424b-9b52-15e464fff246/bin/utaipan-aC7eJsxGYH --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 35eb4fe61244b47e62120cf84d8eaed931ae7a7b0a5140717764703691b11b75 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:06:08,514 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:06:08,516 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:06:08,545 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:06:08,546 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:06:08,547 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:06:08,549 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:06:08,551 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:06:08,553 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:06:08,554 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:06:08,555 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:06:08,557 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:06:08,557 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:06:08,558 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:06:08,560 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:06:08,562 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:06:08,563 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:06:08,564 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:06:08,566 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:06:08,568 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:06:08,570 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:06:08,571 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:06:08,573 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:06:08,574 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:06:08,577 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:06:08,578 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:06:08,578 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:06:08,579 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:06:08,580 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:06:08,581 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:06:08,581 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:06:08,582 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:06:08,583 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:06:08,584 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:06:08,586 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:06:08,586 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:06:08,587 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:06:08,587 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:06:08,588 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:06:08,589 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:06:08,589 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:06:08,590 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cedecf19-8ab1-424b-9b52-15e464fff246/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 05:06:08,615 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:06:08,615 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:06:08,616 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:06:08,616 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:06:08,616 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:06:08,616 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:06:08,617 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:06:08,617 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:06:08,617 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:06:08,617 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:06:08,617 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:06:08,618 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:06:08,618 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:06:08,618 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:06:08,618 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:06:08,619 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:06:08,619 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:06:08,619 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:06:08,620 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:06:08,620 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:06:08,620 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:06:08,620 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:06:08,620 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:06:08,621 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:06:08,621 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:06:08,621 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:06:08,621 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:06:08,621 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:06:08,622 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:06:08,622 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:06:08,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:06:08,622 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:06:08,622 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:06:08,623 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:06:08,623 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:06:08,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:06:08,623 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:06:08,623 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:06:08,624 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:06:08,624 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_cedecf19-8ab1-424b-9b52-15e464fff246/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cedecf19-8ab1-424b-9b52-15e464fff246/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 35eb4fe61244b47e62120cf84d8eaed931ae7a7b0a5140717764703691b11b75 [2021-11-03 05:06:08,841 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:06:08,869 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:06:08,871 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:06:08,872 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:06:08,884 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:06:08,885 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cedecf19-8ab1-424b-9b52-15e464fff246/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2021-11-03 05:06:08,961 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cedecf19-8ab1-424b-9b52-15e464fff246/bin/utaipan-aC7eJsxGYH/data/739dcdbb0/b8ddfe7cfeef4c97bc7ae71db117324f/FLAG20bb4fc00 [2021-11-03 05:06:09,449 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:06:09,450 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cedecf19-8ab1-424b-9b52-15e464fff246/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2021-11-03 05:06:09,463 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cedecf19-8ab1-424b-9b52-15e464fff246/bin/utaipan-aC7eJsxGYH/data/739dcdbb0/b8ddfe7cfeef4c97bc7ae71db117324f/FLAG20bb4fc00 [2021-11-03 05:06:09,796 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cedecf19-8ab1-424b-9b52-15e464fff246/bin/utaipan-aC7eJsxGYH/data/739dcdbb0/b8ddfe7cfeef4c97bc7ae71db117324f [2021-11-03 05:06:09,799 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:06:09,800 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:06:09,801 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:06:09,801 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:06:09,804 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:06:09,805 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:06:09" (1/1) ... [2021-11-03 05:06:09,806 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39a8479f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:06:09, skipping insertion in model container [2021-11-03 05:06:09,806 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:06:09" (1/1) ... [2021-11-03 05:06:09,813 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:06:09,892 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:06:10,150 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_cedecf19-8ab1-424b-9b52-15e464fff246/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c[10021,10034] [2021-11-03 05:06:10,243 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:06:10,262 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:06:10,374 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_cedecf19-8ab1-424b-9b52-15e464fff246/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c[10021,10034] [2021-11-03 05:06:10,430 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:06:10,451 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:06:10,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:06:10 WrapperNode [2021-11-03 05:06:10,451 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:06:10,453 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:06:10,453 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:06:10,453 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:06:10,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:06:10" (1/1) ... [2021-11-03 05:06:10,485 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:06:10" (1/1) ... [2021-11-03 05:06:10,549 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:06:10,550 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:06:10,550 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:06:10,550 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:06:10,559 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:06:10" (1/1) ... [2021-11-03 05:06:10,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:06:10" (1/1) ... [2021-11-03 05:06:10,563 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:06:10" (1/1) ... [2021-11-03 05:06:10,564 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:06:10" (1/1) ... [2021-11-03 05:06:10,578 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:06:10" (1/1) ... [2021-11-03 05:06:10,586 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:06:10" (1/1) ... [2021-11-03 05:06:10,590 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:06:10" (1/1) ... [2021-11-03 05:06:10,595 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:06:10,596 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:06:10,596 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:06:10,597 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:06:10,598 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:06:10" (1/1) ... [2021-11-03 05:06:10,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:06:10,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cedecf19-8ab1-424b-9b52-15e464fff246/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:06:10,640 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cedecf19-8ab1-424b-9b52-15e464fff246/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:06:10,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cedecf19-8ab1-424b-9b52-15e464fff246/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:06:10,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 05:06:10,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:06:10,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:06:10,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:06:12,232 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:06:12,233 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-03 05:06:12,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:06:12 BoogieIcfgContainer [2021-11-03 05:06:12,237 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:06:12,252 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:06:12,253 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:06:12,256 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:06:12,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:06:09" (1/3) ... [2021-11-03 05:06:12,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@630a7b06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:06:12, skipping insertion in model container [2021-11-03 05:06:12,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:06:10" (2/3) ... [2021-11-03 05:06:12,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@630a7b06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:06:12, skipping insertion in model container [2021-11-03 05:06:12,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:06:12" (3/3) ... [2021-11-03 05:06:12,262 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2021-11-03 05:06:12,271 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:06:12,271 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 05:06:12,331 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:06:12,339 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 05:06:12,339 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 05:06:12,362 INFO L276 IsEmpty]: Start isEmpty. Operand has 189 states, 187 states have (on average 1.7112299465240641) internal successors, (320), 188 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:06:12,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-03 05:06:12,375 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:06:12,376 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:06:12,376 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:06:12,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:06:12,381 INFO L85 PathProgramCache]: Analyzing trace with hash -287928466, now seen corresponding path program 1 times [2021-11-03 05:06:12,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:06:12,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334008068] [2021-11-03 05:06:12,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:06:12,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:06:12,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:06:13,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:06:13,063 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:06:13,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334008068] [2021-11-03 05:06:13,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334008068] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:06:13,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:06:13,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-03 05:06:13,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446852384] [2021-11-03 05:06:13,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:06:13,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:06:13,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:06:13,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:06:13,096 INFO L87 Difference]: Start difference. First operand has 189 states, 187 states have (on average 1.7112299465240641) internal successors, (320), 188 states have internal predecessors, (320), 0 states have call successors, (0), 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 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:06:13,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:06:13,595 INFO L93 Difference]: Finished difference Result 751 states and 1205 transitions. [2021-11-03 05:06:13,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 05:06:13,597 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-03 05:06:13,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:06:13,626 INFO L225 Difference]: With dead ends: 751 [2021-11-03 05:06:13,626 INFO L226 Difference]: Without dead ends: 643 [2021-11-03 05:06:13,631 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:06:13,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-11-03 05:06:13,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 633. [2021-11-03 05:06:13,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 1.4082278481012658) internal successors, (890), 632 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:06:13,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 890 transitions. [2021-11-03 05:06:13,731 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 890 transitions. Word has length 81 [2021-11-03 05:06:13,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:06:13,732 INFO L470 AbstractCegarLoop]: Abstraction has 633 states and 890 transitions. [2021-11-03 05:06:13,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:06:13,733 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 890 transitions. [2021-11-03 05:06:13,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-03 05:06:13,738 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:06:13,738 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:06:13,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 05:06:13,739 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:06:13,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:06:13,740 INFO L85 PathProgramCache]: Analyzing trace with hash 132050834, now seen corresponding path program 1 times [2021-11-03 05:06:13,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:06:13,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124931647] [2021-11-03 05:06:13,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:06:13,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:06:13,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:06:13,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:06:13,845 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:06:13,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124931647] [2021-11-03 05:06:13,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124931647] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:06:13,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:06:13,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:06:13,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807583867] [2021-11-03 05:06:13,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:06:13,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:06:13,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:06:13,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:06:13,849 INFO L87 Difference]: Start difference. First operand 633 states and 890 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:06:14,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:06:14,233 INFO L93 Difference]: Finished difference Result 1553 states and 2241 transitions. [2021-11-03 05:06:14,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:06:14,235 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-03 05:06:14,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:06:14,241 INFO L225 Difference]: With dead ends: 1553 [2021-11-03 05:06:14,241 INFO L226 Difference]: Without dead ends: 1006 [2021-11-03 05:06:14,250 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:06:14,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2021-11-03 05:06:14,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 1004. [2021-11-03 05:06:14,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1003 states have (on average 1.4376869391824527) internal successors, (1442), 1003 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:06:14,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 1442 transitions. [2021-11-03 05:06:14,337 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 1442 transitions. Word has length 82 [2021-11-03 05:06:14,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:06:14,338 INFO L470 AbstractCegarLoop]: Abstraction has 1004 states and 1442 transitions. [2021-11-03 05:06:14,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:06:14,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 1442 transitions. [2021-11-03 05:06:14,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-03 05:06:14,341 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:06:14,341 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:06:14,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 05:06:14,342 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:06:14,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:06:14,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1214095645, now seen corresponding path program 1 times [2021-11-03 05:06:14,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:06:14,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700637434] [2021-11-03 05:06:14,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:06:14,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:06:14,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:06:14,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:06:14,433 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:06:14,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700637434] [2021-11-03 05:06:14,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700637434] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:06:14,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:06:14,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:06:14,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551766532] [2021-11-03 05:06:14,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:06:14,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:06:14,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:06:14,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:06:14,445 INFO L87 Difference]: Start difference. First operand 1004 states and 1442 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:06:14,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:06:14,896 INFO L93 Difference]: Finished difference Result 2636 states and 3862 transitions. [2021-11-03 05:06:14,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:06:14,897 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-03 05:06:14,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:06:14,908 INFO L225 Difference]: With dead ends: 2636 [2021-11-03 05:06:14,908 INFO L226 Difference]: Without dead ends: 1748 [2021-11-03 05:06:14,910 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:06:14,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2021-11-03 05:06:15,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 1746. [2021-11-03 05:06:15,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1746 states, 1745 states have (on average 1.4567335243553008) internal successors, (2542), 1745 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:06:15,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 2542 transitions. [2021-11-03 05:06:15,091 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 2542 transitions. Word has length 82 [2021-11-03 05:06:15,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:06:15,092 INFO L470 AbstractCegarLoop]: Abstraction has 1746 states and 2542 transitions. [2021-11-03 05:06:15,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:06:15,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 2542 transitions. [2021-11-03 05:06:15,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-03 05:06:15,095 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:06:15,095 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:06:15,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 05:06:15,096 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:06:15,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:06:15,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1555513659, now seen corresponding path program 1 times [2021-11-03 05:06:15,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:06:15,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279970165] [2021-11-03 05:06:15,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:06:15,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:06:15,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:06:15,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:06:15,235 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:06:15,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279970165] [2021-11-03 05:06:15,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279970165] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:06:15,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:06:15,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:06:15,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937685099] [2021-11-03 05:06:15,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:06:15,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:06:15,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:06:15,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:06:15,244 INFO L87 Difference]: Start difference. First operand 1746 states and 2542 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:06:15,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:06:15,772 INFO L93 Difference]: Finished difference Result 4784 states and 7062 transitions. [2021-11-03 05:06:15,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:06:15,773 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-03 05:06:15,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:06:15,794 INFO L225 Difference]: With dead ends: 4784 [2021-11-03 05:06:15,794 INFO L226 Difference]: Without dead ends: 3232 [2021-11-03 05:06:15,799 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:06:15,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3232 states. [2021-11-03 05:06:16,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3232 to 3230. [2021-11-03 05:06:16,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3230 states, 3229 states have (on average 1.4673273459275318) internal successors, (4738), 3229 states have internal predecessors, (4738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:06:16,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3230 states to 3230 states and 4738 transitions. [2021-11-03 05:06:16,155 INFO L78 Accepts]: Start accepts. Automaton has 3230 states and 4738 transitions. Word has length 82 [2021-11-03 05:06:16,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:06:16,155 INFO L470 AbstractCegarLoop]: Abstraction has 3230 states and 4738 transitions. [2021-11-03 05:06:16,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:06:16,157 INFO L276 IsEmpty]: Start isEmpty. Operand 3230 states and 4738 transitions. [2021-11-03 05:06:16,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-03 05:06:16,164 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:06:16,164 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:06:16,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-03 05:06:16,165 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:06:16,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:06:16,165 INFO L85 PathProgramCache]: Analyzing trace with hash -369548300, now seen corresponding path program 1 times [2021-11-03 05:06:16,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:06:16,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797958931] [2021-11-03 05:06:16,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:06:16,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:06:16,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:06:16,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:06:16,261 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:06:16,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797958931] [2021-11-03 05:06:16,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797958931] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:06:16,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:06:16,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:06:16,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309133099] [2021-11-03 05:06:16,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:06:16,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:06:16,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:06:16,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:06:16,264 INFO L87 Difference]: Start difference. First operand 3230 states and 4738 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:06:17,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:06:17,054 INFO L93 Difference]: Finished difference Result 9277 states and 13713 transitions. [2021-11-03 05:06:17,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:06:17,055 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-03 05:06:17,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:06:17,090 INFO L225 Difference]: With dead ends: 9277 [2021-11-03 05:06:17,091 INFO L226 Difference]: Without dead ends: 6200 [2021-11-03 05:06:17,096 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:06:17,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6200 states. [2021-11-03 05:06:17,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6200 to 6198. [2021-11-03 05:06:17,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6198 states, 6197 states have (on average 1.4690979506212682) internal successors, (9104), 6197 states have internal predecessors, (9104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:06:17,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6198 states to 6198 states and 9104 transitions. [2021-11-03 05:06:17,701 INFO L78 Accepts]: Start accepts. Automaton has 6198 states and 9104 transitions. Word has length 82 [2021-11-03 05:06:17,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:06:17,701 INFO L470 AbstractCegarLoop]: Abstraction has 6198 states and 9104 transitions. [2021-11-03 05:06:17,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:06:17,702 INFO L276 IsEmpty]: Start isEmpty. Operand 6198 states and 9104 transitions. [2021-11-03 05:06:17,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-03 05:06:17,703 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:06:17,703 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:06:17,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-03 05:06:17,704 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:06:17,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:06:17,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1738975743, now seen corresponding path program 1 times [2021-11-03 05:06:17,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:06:17,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631006613] [2021-11-03 05:06:17,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:06:17,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:06:17,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:06:17,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:06:17,770 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:06:17,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631006613] [2021-11-03 05:06:17,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631006613] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:06:17,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:06:17,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:06:17,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256377143] [2021-11-03 05:06:17,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:06:17,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:06:17,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:06:17,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:06:17,773 INFO L87 Difference]: Start difference. First operand 6198 states and 9104 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:06:18,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:06:18,991 INFO L93 Difference]: Finished difference Result 18271 states and 26937 transitions. [2021-11-03 05:06:18,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:06:18,992 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-03 05:06:18,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:06:19,060 INFO L225 Difference]: With dead ends: 18271 [2021-11-03 05:06:19,060 INFO L226 Difference]: Without dead ends: 12136 [2021-11-03 05:06:19,071 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:06:19,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12136 states. [2021-11-03 05:06:20,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12136 to 12134. [2021-11-03 05:06:20,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12134 states, 12133 states have (on average 1.4622105002884696) internal successors, (17741), 12133 states have internal predecessors, (17741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:06:20,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12134 states to 12134 states and 17741 transitions. [2021-11-03 05:06:20,180 INFO L78 Accepts]: Start accepts. Automaton has 12134 states and 17741 transitions. Word has length 82 [2021-11-03 05:06:20,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:06:20,184 INFO L470 AbstractCegarLoop]: Abstraction has 12134 states and 17741 transitions. [2021-11-03 05:06:20,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:06:20,185 INFO L276 IsEmpty]: Start isEmpty. Operand 12134 states and 17741 transitions. [2021-11-03 05:06:20,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-03 05:06:20,186 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:06:20,186 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:06:20,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-03 05:06:20,187 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:06:20,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:06:20,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1616521928, now seen corresponding path program 1 times [2021-11-03 05:06:20,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:06:20,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117951909] [2021-11-03 05:06:20,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:06:20,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:06:20,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:06:20,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:06:20,283 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:06:20,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117951909] [2021-11-03 05:06:20,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117951909] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:06:20,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:06:20,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:06:20,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905226178] [2021-11-03 05:06:20,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:06:20,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:06:20,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:06:20,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:06:20,286 INFO L87 Difference]: Start difference. First operand 12134 states and 17741 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:06:21,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:06:21,322 INFO L93 Difference]: Finished difference Result 24189 states and 35393 transitions. [2021-11-03 05:06:21,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:06:21,323 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-03 05:06:21,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:06:21,357 INFO L225 Difference]: With dead ends: 24189 [2021-11-03 05:06:21,357 INFO L226 Difference]: Without dead ends: 12134 [2021-11-03 05:06:21,370 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:06:21,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12134 states. [2021-11-03 05:06:22,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12134 to 12134. [2021-11-03 05:06:22,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12134 states, 12133 states have (on average 1.4621280804417705) internal successors, (17740), 12133 states have internal predecessors, (17740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:06:22,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12134 states to 12134 states and 17740 transitions. [2021-11-03 05:06:22,244 INFO L78 Accepts]: Start accepts. Automaton has 12134 states and 17740 transitions. Word has length 83 [2021-11-03 05:06:22,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:06:22,244 INFO L470 AbstractCegarLoop]: Abstraction has 12134 states and 17740 transitions. [2021-11-03 05:06:22,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:06:22,245 INFO L276 IsEmpty]: Start isEmpty. Operand 12134 states and 17740 transitions. [2021-11-03 05:06:22,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-03 05:06:22,246 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:06:22,246 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:06:22,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-03 05:06:22,247 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:06:22,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:06:22,247 INFO L85 PathProgramCache]: Analyzing trace with hash -779085158, now seen corresponding path program 1 times [2021-11-03 05:06:22,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:06:22,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243104438] [2021-11-03 05:06:22,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:06:22,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:06:22,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:06:23,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:06:23,272 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:06:23,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243104438] [2021-11-03 05:06:23,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243104438] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:06:23,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:06:23,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-03 05:06:23,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348417874] [2021-11-03 05:06:23,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-03 05:06:23,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:06:23,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-03 05:06:23,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-11-03 05:06:23,275 INFO L87 Difference]: Start difference. First operand 12134 states and 17740 transitions. Second operand has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:06:26,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:06:26,791 INFO L93 Difference]: Finished difference Result 25992 states and 37856 transitions. [2021-11-03 05:06:26,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-03 05:06:26,792 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-03 05:06:26,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:06:26,864 INFO L225 Difference]: With dead ends: 25992 [2021-11-03 05:06:26,865 INFO L226 Difference]: Without dead ends: 25990 [2021-11-03 05:06:26,876 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=287, Invalid=835, Unknown=0, NotChecked=0, Total=1122 [2021-11-03 05:06:26,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25990 states. [2021-11-03 05:06:28,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25990 to 19540. [2021-11-03 05:06:28,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19540 states, 19539 states have (on average 1.4556527969701623) internal successors, (28442), 19539 states have internal predecessors, (28442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:06:28,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19540 states to 19540 states and 28442 transitions. [2021-11-03 05:06:28,401 INFO L78 Accepts]: Start accepts. Automaton has 19540 states and 28442 transitions. Word has length 83 [2021-11-03 05:06:28,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:06:28,402 INFO L470 AbstractCegarLoop]: Abstraction has 19540 states and 28442 transitions. [2021-11-03 05:06:28,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:06:28,402 INFO L276 IsEmpty]: Start isEmpty. Operand 19540 states and 28442 transitions. [2021-11-03 05:06:28,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-03 05:06:28,404 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:06:28,404 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:06:28,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-03 05:06:28,405 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:06:28,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:06:28,405 INFO L85 PathProgramCache]: Analyzing trace with hash -658228550, now seen corresponding path program 1 times [2021-11-03 05:06:28,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:06:28,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073488863] [2021-11-03 05:06:28,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:06:28,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:06:28,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:06:29,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:06:29,261 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:06:29,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073488863] [2021-11-03 05:06:29,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073488863] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:06:29,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:06:29,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-03 05:06:29,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799376327] [2021-11-03 05:06:29,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-03 05:06:29,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:06:29,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-03 05:06:29,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-11-03 05:06:29,264 INFO L87 Difference]: Start difference. First operand 19540 states and 28442 transitions. Second operand has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:06:32,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:06:32,139 INFO L93 Difference]: Finished difference Result 29753 states and 43228 transitions. [2021-11-03 05:06:32,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-03 05:06:32,140 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-03 05:06:32,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:06:32,207 INFO L225 Difference]: With dead ends: 29753 [2021-11-03 05:06:32,208 INFO L226 Difference]: Without dead ends: 29751 [2021-11-03 05:06:32,216 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=283, Invalid=839, Unknown=0, NotChecked=0, Total=1122 [2021-11-03 05:06:32,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29751 states. [2021-11-03 05:06:33,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29751 to 19567. [2021-11-03 05:06:33,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19567 states, 19566 states have (on average 1.4553817847286108) internal successors, (28476), 19566 states have internal predecessors, (28476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:06:33,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19567 states to 19567 states and 28476 transitions. [2021-11-03 05:06:33,813 INFO L78 Accepts]: Start accepts. Automaton has 19567 states and 28476 transitions. Word has length 83 [2021-11-03 05:06:33,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:06:33,813 INFO L470 AbstractCegarLoop]: Abstraction has 19567 states and 28476 transitions. [2021-11-03 05:06:33,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:06:33,814 INFO L276 IsEmpty]: Start isEmpty. Operand 19567 states and 28476 transitions. [2021-11-03 05:06:33,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-03 05:06:33,816 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:06:33,816 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:06:33,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-03 05:06:33,816 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:06:33,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:06:33,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1354915078, now seen corresponding path program 1 times [2021-11-03 05:06:33,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:06:33,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779597693] [2021-11-03 05:06:33,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:06:33,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:06:33,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:06:34,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:06:34,663 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:06:34,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779597693] [2021-11-03 05:06:34,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779597693] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:06:34,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:06:34,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-03 05:06:34,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757513201] [2021-11-03 05:06:34,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-03 05:06:34,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:06:34,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-03 05:06:34,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-11-03 05:06:34,667 INFO L87 Difference]: Start difference. First operand 19567 states and 28476 transitions. Second operand has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:06:37,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:06:37,425 INFO L93 Difference]: Finished difference Result 23988 states and 34777 transitions. [2021-11-03 05:06:37,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-03 05:06:37,426 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-03 05:06:37,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:06:37,464 INFO L225 Difference]: With dead ends: 23988 [2021-11-03 05:06:37,464 INFO L226 Difference]: Without dead ends: 23986 [2021-11-03 05:06:37,476 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2021-11-03 05:06:37,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23986 states. [2021-11-03 05:06:38,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23986 to 19590. [2021-11-03 05:06:38,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19590 states, 19589 states have (on average 1.4550513043034357) internal successors, (28503), 19589 states have internal predecessors, (28503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:06:38,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19590 states to 19590 states and 28503 transitions. [2021-11-03 05:06:38,957 INFO L78 Accepts]: Start accepts. Automaton has 19590 states and 28503 transitions. Word has length 83 [2021-11-03 05:06:38,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:06:38,958 INFO L470 AbstractCegarLoop]: Abstraction has 19590 states and 28503 transitions. [2021-11-03 05:06:38,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:06:38,958 INFO L276 IsEmpty]: Start isEmpty. Operand 19590 states and 28503 transitions. [2021-11-03 05:06:38,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-03 05:06:38,959 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:06:38,959 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:06:38,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-03 05:06:38,960 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:06:38,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:06:38,960 INFO L85 PathProgramCache]: Analyzing trace with hash -907144486, now seen corresponding path program 1 times [2021-11-03 05:06:38,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:06:38,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090526958] [2021-11-03 05:06:38,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:06:38,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:06:38,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:06:39,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:06:39,714 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:06:39,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090526958] [2021-11-03 05:06:39,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090526958] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:06:39,714 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:06:39,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-03 05:06:39,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694209009] [2021-11-03 05:06:39,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-03 05:06:39,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:06:39,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-03 05:06:39,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-11-03 05:06:39,716 INFO L87 Difference]: Start difference. First operand 19590 states and 28503 transitions. Second operand has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:06:41,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:06:41,968 INFO L93 Difference]: Finished difference Result 26297 states and 38159 transitions. [2021-11-03 05:06:41,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-03 05:06:41,969 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-03 05:06:41,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:06:42,009 INFO L225 Difference]: With dead ends: 26297 [2021-11-03 05:06:42,010 INFO L226 Difference]: Without dead ends: 23991 [2021-11-03 05:06:42,026 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2021-11-03 05:06:42,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23991 states. [2021-11-03 05:06:43,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23991 to 21719. [2021-11-03 05:06:43,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21719 states, 21718 states have (on average 1.4528962151210978) internal successors, (31554), 21718 states have internal predecessors, (31554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:06:43,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21719 states to 21719 states and 31554 transitions. [2021-11-03 05:06:43,495 INFO L78 Accepts]: Start accepts. Automaton has 21719 states and 31554 transitions. Word has length 83 [2021-11-03 05:06:43,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:06:43,495 INFO L470 AbstractCegarLoop]: Abstraction has 21719 states and 31554 transitions. [2021-11-03 05:06:43,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:06:43,496 INFO L276 IsEmpty]: Start isEmpty. Operand 21719 states and 31554 transitions. [2021-11-03 05:06:43,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-03 05:06:43,497 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:06:43,498 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:06:43,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-03 05:06:43,498 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:06:43,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:06:43,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1407077766, now seen corresponding path program 1 times [2021-11-03 05:06:43,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:06:43,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170142742] [2021-11-03 05:06:43,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:06:43,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:06:43,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:06:44,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:06:44,279 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:06:44,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170142742] [2021-11-03 05:06:44,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170142742] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:06:44,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:06:44,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-03 05:06:44,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680250457] [2021-11-03 05:06:44,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-03 05:06:44,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:06:44,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-03 05:06:44,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-11-03 05:06:44,281 INFO L87 Difference]: Start difference. First operand 21719 states and 31554 transitions. Second operand has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:06:48,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:06:48,639 INFO L93 Difference]: Finished difference Result 38960 states and 56641 transitions. [2021-11-03 05:06:48,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-03 05:06:48,640 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-03 05:06:48,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:06:48,700 INFO L225 Difference]: With dead ends: 38960 [2021-11-03 05:06:48,700 INFO L226 Difference]: Without dead ends: 38958 [2021-11-03 05:06:48,713 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=291, Invalid=831, Unknown=0, NotChecked=0, Total=1122 [2021-11-03 05:06:48,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38958 states. [2021-11-03 05:06:50,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38958 to 23574. [2021-11-03 05:06:50,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23574 states, 23573 states have (on average 1.453272812115556) internal successors, (34258), 23573 states have internal predecessors, (34258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:06:50,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23574 states to 23574 states and 34258 transitions. [2021-11-03 05:06:50,541 INFO L78 Accepts]: Start accepts. Automaton has 23574 states and 34258 transitions. Word has length 83 [2021-11-03 05:06:50,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:06:50,542 INFO L470 AbstractCegarLoop]: Abstraction has 23574 states and 34258 transitions. [2021-11-03 05:06:50,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:06:50,542 INFO L276 IsEmpty]: Start isEmpty. Operand 23574 states and 34258 transitions. [2021-11-03 05:06:50,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-03 05:06:50,543 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:06:50,544 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:06:50,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-03 05:06:50,544 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:06:50,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:06:50,545 INFO L85 PathProgramCache]: Analyzing trace with hash 746454210, now seen corresponding path program 1 times [2021-11-03 05:06:50,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:06:50,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704908044] [2021-11-03 05:06:50,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:06:50,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:06:50,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:06:51,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:06:51,394 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:06:51,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704908044] [2021-11-03 05:06:51,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704908044] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:06:51,395 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:06:51,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-03 05:06:51,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513446335] [2021-11-03 05:06:51,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-03 05:06:51,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:06:51,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-03 05:06:51,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-11-03 05:06:51,396 INFO L87 Difference]: Start difference. First operand 23574 states and 34258 transitions. Second operand has 20 states, 20 states have (on average 4.2) internal successors, (84), 20 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:06:55,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:06:55,785 INFO L93 Difference]: Finished difference Result 45746 states and 66630 transitions. [2021-11-03 05:06:55,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-03 05:06:55,786 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.2) internal successors, (84), 20 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-03 05:06:55,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:06:55,849 INFO L225 Difference]: With dead ends: 45746 [2021-11-03 05:06:55,849 INFO L226 Difference]: Without dead ends: 45744 [2021-11-03 05:06:55,862 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=295, Invalid=827, Unknown=0, NotChecked=0, Total=1122 [2021-11-03 05:06:55,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45744 states. [2021-11-03 05:06:57,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45744 to 26274. [2021-11-03 05:06:58,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26274 states, 26273 states have (on average 1.4545350740303733) internal successors, (38215), 26273 states have internal predecessors, (38215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:06:58,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26274 states to 26274 states and 38215 transitions. [2021-11-03 05:06:58,042 INFO L78 Accepts]: Start accepts. Automaton has 26274 states and 38215 transitions. Word has length 84 [2021-11-03 05:06:58,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:06:58,043 INFO L470 AbstractCegarLoop]: Abstraction has 26274 states and 38215 transitions. [2021-11-03 05:06:58,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.2) internal successors, (84), 20 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:06:58,043 INFO L276 IsEmpty]: Start isEmpty. Operand 26274 states and 38215 transitions. [2021-11-03 05:06:58,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-03 05:06:58,045 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:06:58,045 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:06:58,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-03 05:06:58,046 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:06:58,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:06:58,046 INFO L85 PathProgramCache]: Analyzing trace with hash -213407002, now seen corresponding path program 1 times [2021-11-03 05:06:58,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:06:58,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494627232] [2021-11-03 05:06:58,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:06:58,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:06:58,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:06:59,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:06:59,037 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:06:59,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494627232] [2021-11-03 05:06:59,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494627232] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:06:59,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:06:59,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-03 05:06:59,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146494397] [2021-11-03 05:06:59,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-03 05:06:59,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:06:59,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-03 05:06:59,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-11-03 05:06:59,039 INFO L87 Difference]: Start difference. First operand 26274 states and 38215 transitions. Second operand has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:07:04,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:07:04,089 INFO L93 Difference]: Finished difference Result 41968 states and 60891 transitions. [2021-11-03 05:07:04,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-03 05:07:04,090 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-03 05:07:04,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:07:04,146 INFO L225 Difference]: With dead ends: 41968 [2021-11-03 05:07:04,146 INFO L226 Difference]: Without dead ends: 41966 [2021-11-03 05:07:04,157 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=364, Invalid=1042, Unknown=0, NotChecked=0, Total=1406 [2021-11-03 05:07:04,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41966 states. [2021-11-03 05:07:06,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41966 to 26280. [2021-11-03 05:07:06,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26280 states, 26279 states have (on average 1.4544693481487119) internal successors, (38222), 26279 states have internal predecessors, (38222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:07:06,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26280 states to 26280 states and 38222 transitions. [2021-11-03 05:07:06,148 INFO L78 Accepts]: Start accepts. Automaton has 26280 states and 38222 transitions. Word has length 85 [2021-11-03 05:07:06,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:07:06,149 INFO L470 AbstractCegarLoop]: Abstraction has 26280 states and 38222 transitions. [2021-11-03 05:07:06,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:07:06,149 INFO L276 IsEmpty]: Start isEmpty. Operand 26280 states and 38222 transitions. [2021-11-03 05:07:06,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-03 05:07:06,150 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:07:06,151 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:07:06,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-03 05:07:06,151 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:07:06,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:07:06,152 INFO L85 PathProgramCache]: Analyzing trace with hash -910093530, now seen corresponding path program 1 times [2021-11-03 05:07:06,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:07:06,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628874042] [2021-11-03 05:07:06,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:07:06,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:07:06,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:07:07,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:07:07,068 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:07:07,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628874042] [2021-11-03 05:07:07,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628874042] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:07:07,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:07:07,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-03 05:07:07,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690133485] [2021-11-03 05:07:07,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-03 05:07:07,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:07:07,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-03 05:07:07,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-11-03 05:07:07,069 INFO L87 Difference]: Start difference. First operand 26280 states and 38222 transitions. Second operand has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:07:11,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:07:11,963 INFO L93 Difference]: Finished difference Result 47504 states and 68988 transitions. [2021-11-03 05:07:11,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-03 05:07:11,964 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-03 05:07:11,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:07:12,017 INFO L225 Difference]: With dead ends: 47504 [2021-11-03 05:07:12,017 INFO L226 Difference]: Without dead ends: 47502 [2021-11-03 05:07:12,025 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2021-11-03 05:07:12,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47502 states. [2021-11-03 05:07:14,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47502 to 26287. [2021-11-03 05:07:14,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26287 states, 26286 states have (on average 1.454424408430343) internal successors, (38231), 26286 states have internal predecessors, (38231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:07:14,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26287 states to 26287 states and 38231 transitions. [2021-11-03 05:07:14,123 INFO L78 Accepts]: Start accepts. Automaton has 26287 states and 38231 transitions. Word has length 85 [2021-11-03 05:07:14,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:07:14,123 INFO L470 AbstractCegarLoop]: Abstraction has 26287 states and 38231 transitions. [2021-11-03 05:07:14,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:07:14,123 INFO L276 IsEmpty]: Start isEmpty. Operand 26287 states and 38231 transitions. [2021-11-03 05:07:14,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-03 05:07:14,124 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:07:14,125 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:07:14,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-03 05:07:14,125 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:07:14,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:07:14,125 INFO L85 PathProgramCache]: Analyzing trace with hash -462322938, now seen corresponding path program 1 times [2021-11-03 05:07:14,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:07:14,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784298685] [2021-11-03 05:07:14,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:07:14,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:07:14,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:07:15,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:07:15,036 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:07:15,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784298685] [2021-11-03 05:07:15,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784298685] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:07:15,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:07:15,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-03 05:07:15,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313118598] [2021-11-03 05:07:15,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-03 05:07:15,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:07:15,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-03 05:07:15,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-11-03 05:07:15,038 INFO L87 Difference]: Start difference. First operand 26287 states and 38231 transitions. Second operand has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:07:19,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:07:19,613 INFO L93 Difference]: Finished difference Result 48318 states and 70112 transitions. [2021-11-03 05:07:19,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-03 05:07:19,613 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-03 05:07:19,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:07:19,670 INFO L225 Difference]: With dead ends: 48318 [2021-11-03 05:07:19,671 INFO L226 Difference]: Without dead ends: 43708 [2021-11-03 05:07:19,689 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=273, Invalid=849, Unknown=0, NotChecked=0, Total=1122 [2021-11-03 05:07:19,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43708 states. [2021-11-03 05:07:22,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43708 to 30329. [2021-11-03 05:07:22,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30329 states, 30328 states have (on average 1.4518596676338698) internal successors, (44032), 30328 states have internal predecessors, (44032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:07:22,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30329 states to 30329 states and 44032 transitions. [2021-11-03 05:07:22,500 INFO L78 Accepts]: Start accepts. Automaton has 30329 states and 44032 transitions. Word has length 85 [2021-11-03 05:07:22,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:07:22,501 INFO L470 AbstractCegarLoop]: Abstraction has 30329 states and 44032 transitions. [2021-11-03 05:07:22,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:07:22,501 INFO L276 IsEmpty]: Start isEmpty. Operand 30329 states and 44032 transitions. [2021-11-03 05:07:22,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-03 05:07:22,502 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:07:22,502 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:07:22,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-03 05:07:22,503 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:07:22,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:07:22,503 INFO L85 PathProgramCache]: Analyzing trace with hash -731010234, now seen corresponding path program 1 times [2021-11-03 05:07:22,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:07:22,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827397952] [2021-11-03 05:07:22,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:07:22,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:07:22,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:07:23,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:07:23,360 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:07:23,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827397952] [2021-11-03 05:07:23,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827397952] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:07:23,361 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:07:23,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-03 05:07:23,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133863823] [2021-11-03 05:07:23,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-03 05:07:23,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:07:23,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-03 05:07:23,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-11-03 05:07:23,362 INFO L87 Difference]: Start difference. First operand 30329 states and 44032 transitions. Second operand has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:07:28,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:07:28,817 INFO L93 Difference]: Finished difference Result 46022 states and 66706 transitions. [2021-11-03 05:07:28,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-03 05:07:28,818 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-03 05:07:28,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:07:28,886 INFO L225 Difference]: With dead ends: 46022 [2021-11-03 05:07:28,886 INFO L226 Difference]: Without dead ends: 46020 [2021-11-03 05:07:28,898 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-11-03 05:07:28,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46020 states. [2021-11-03 05:07:31,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46020 to 30353. [2021-11-03 05:07:31,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30353 states, 30352 states have (on average 1.4517329994728518) internal successors, (44063), 30352 states have internal predecessors, (44063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:07:31,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30353 states to 30353 states and 44063 transitions. [2021-11-03 05:07:31,807 INFO L78 Accepts]: Start accepts. Automaton has 30353 states and 44063 transitions. Word has length 85 [2021-11-03 05:07:31,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:07:31,807 INFO L470 AbstractCegarLoop]: Abstraction has 30353 states and 44063 transitions. [2021-11-03 05:07:31,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:07:31,808 INFO L276 IsEmpty]: Start isEmpty. Operand 30353 states and 44063 transitions. [2021-11-03 05:07:31,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-03 05:07:31,809 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:07:31,809 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:07:31,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-03 05:07:31,809 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:07:31,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:07:31,810 INFO L85 PathProgramCache]: Analyzing trace with hash -283239642, now seen corresponding path program 1 times [2021-11-03 05:07:31,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:07:31,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299091044] [2021-11-03 05:07:31,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:07:31,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:07:31,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:07:32,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:07:32,695 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:07:32,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299091044] [2021-11-03 05:07:32,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299091044] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:07:32,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:07:32,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-03 05:07:32,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459910717] [2021-11-03 05:07:32,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-03 05:07:32,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:07:32,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-03 05:07:32,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-11-03 05:07:32,698 INFO L87 Difference]: Start difference. First operand 30353 states and 44063 transitions. Second operand has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:07:37,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:07:37,360 INFO L93 Difference]: Finished difference Result 39222 states and 56810 transitions. [2021-11-03 05:07:37,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-03 05:07:37,360 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-03 05:07:37,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:07:37,409 INFO L225 Difference]: With dead ends: 39222 [2021-11-03 05:07:37,409 INFO L226 Difference]: Without dead ends: 36916 [2021-11-03 05:07:37,425 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=296, Invalid=894, Unknown=0, NotChecked=0, Total=1190 [2021-11-03 05:07:37,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36916 states. [2021-11-03 05:07:40,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36916 to 30350. [2021-11-03 05:07:40,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30350 states, 30349 states have (on average 1.4517447032851165) internal successors, (44059), 30349 states have internal predecessors, (44059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:07:40,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30350 states to 30350 states and 44059 transitions. [2021-11-03 05:07:40,328 INFO L78 Accepts]: Start accepts. Automaton has 30350 states and 44059 transitions. Word has length 85 [2021-11-03 05:07:40,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:07:40,328 INFO L470 AbstractCegarLoop]: Abstraction has 30350 states and 44059 transitions. [2021-11-03 05:07:40,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:07:40,329 INFO L276 IsEmpty]: Start isEmpty. Operand 30350 states and 44059 transitions. [2021-11-03 05:07:40,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-03 05:07:40,330 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:07:40,331 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:07:40,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-03 05:07:40,331 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:07:40,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:07:40,331 INFO L85 PathProgramCache]: Analyzing trace with hash 578943846, now seen corresponding path program 1 times [2021-11-03 05:07:40,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:07:40,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065567231] [2021-11-03 05:07:40,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:07:40,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:07:40,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:07:41,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:07:41,432 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:07:41,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065567231] [2021-11-03 05:07:41,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065567231] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:07:41,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:07:41,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-03 05:07:41,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862726645] [2021-11-03 05:07:41,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-03 05:07:41,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:07:41,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-03 05:07:41,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-11-03 05:07:41,433 INFO L87 Difference]: Start difference. First operand 30350 states and 44059 transitions. Second operand has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:07:46,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:07:46,109 INFO L93 Difference]: Finished difference Result 36961 states and 53509 transitions. [2021-11-03 05:07:46,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-03 05:07:46,110 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-03 05:07:46,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:07:46,157 INFO L225 Difference]: With dead ends: 36961 [2021-11-03 05:07:46,157 INFO L226 Difference]: Without dead ends: 36959 [2021-11-03 05:07:46,168 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=284, Invalid=906, Unknown=0, NotChecked=0, Total=1190 [2021-11-03 05:07:46,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36959 states. [2021-11-03 05:07:49,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36959 to 31515. [2021-11-03 05:07:49,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31515 states, 31514 states have (on average 1.4503712635653996) internal successors, (45707), 31514 states have internal predecessors, (45707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:07:49,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31515 states to 31515 states and 45707 transitions. [2021-11-03 05:07:49,263 INFO L78 Accepts]: Start accepts. Automaton has 31515 states and 45707 transitions. Word has length 85 [2021-11-03 05:07:49,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:07:49,263 INFO L470 AbstractCegarLoop]: Abstraction has 31515 states and 45707 transitions. [2021-11-03 05:07:49,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:07:49,263 INFO L276 IsEmpty]: Start isEmpty. Operand 31515 states and 45707 transitions. [2021-11-03 05:07:49,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-03 05:07:49,265 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:07:49,265 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:07:49,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-03 05:07:49,265 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:07:49,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:07:49,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1755228838, now seen corresponding path program 1 times [2021-11-03 05:07:49,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:07:49,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528784613] [2021-11-03 05:07:49,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:07:49,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:07:49,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:07:50,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:07:50,233 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:07:50,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528784613] [2021-11-03 05:07:50,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528784613] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:07:50,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:07:50,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-03 05:07:50,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606758656] [2021-11-03 05:07:50,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-03 05:07:50,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:07:50,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-03 05:07:50,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-11-03 05:07:50,235 INFO L87 Difference]: Start difference. First operand 31515 states and 45707 transitions. Second operand has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:07:56,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:07:56,924 INFO L93 Difference]: Finished difference Result 50811 states and 73550 transitions. [2021-11-03 05:07:56,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-03 05:07:56,924 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-03 05:07:56,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:07:56,996 INFO L225 Difference]: With dead ends: 50811 [2021-11-03 05:07:56,996 INFO L226 Difference]: Without dead ends: 50809 [2021-11-03 05:07:57,004 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=371, Invalid=1035, Unknown=0, NotChecked=0, Total=1406 [2021-11-03 05:07:57,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50809 states. [2021-11-03 05:08:00,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50809 to 31530. [2021-11-03 05:08:00,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31530 states, 31529 states have (on average 1.4503472993117448) internal successors, (45728), 31529 states have internal predecessors, (45728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:08:00,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31530 states to 31530 states and 45728 transitions. [2021-11-03 05:08:00,112 INFO L78 Accepts]: Start accepts. Automaton has 31530 states and 45728 transitions. Word has length 85 [2021-11-03 05:08:00,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:08:00,113 INFO L470 AbstractCegarLoop]: Abstraction has 31530 states and 45728 transitions. [2021-11-03 05:08:00,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:08:00,113 INFO L276 IsEmpty]: Start isEmpty. Operand 31530 states and 45728 transitions. [2021-11-03 05:08:00,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-03 05:08:00,115 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:08:00,115 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:08:00,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-03 05:08:00,115 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:08:00,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:08:00,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1876085446, now seen corresponding path program 1 times [2021-11-03 05:08:00,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:08:00,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076702991] [2021-11-03 05:08:00,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:08:00,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:08:00,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:08:00,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:08:00,937 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:08:00,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076702991] [2021-11-03 05:08:00,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076702991] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:08:00,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:08:00,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-03 05:08:00,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542692190] [2021-11-03 05:08:00,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-03 05:08:00,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:08:00,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-03 05:08:00,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-11-03 05:08:00,939 INFO L87 Difference]: Start difference. First operand 31530 states and 45728 transitions. Second operand has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:08:07,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:08:07,686 INFO L93 Difference]: Finished difference Result 58007 states and 84187 transitions. [2021-11-03 05:08:07,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-03 05:08:07,686 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-03 05:08:07,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:08:07,774 INFO L225 Difference]: With dead ends: 58007 [2021-11-03 05:08:07,774 INFO L226 Difference]: Without dead ends: 58005 [2021-11-03 05:08:07,787 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-11-03 05:08:07,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58005 states. [2021-11-03 05:08:11,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58005 to 31536. [2021-11-03 05:08:11,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31536 states, 31535 states have (on average 1.4502933248771206) internal successors, (45735), 31535 states have internal predecessors, (45735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:08:11,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31536 states to 31536 states and 45735 transitions. [2021-11-03 05:08:11,317 INFO L78 Accepts]: Start accepts. Automaton has 31536 states and 45735 transitions. Word has length 85 [2021-11-03 05:08:11,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:08:11,317 INFO L470 AbstractCegarLoop]: Abstraction has 31536 states and 45735 transitions. [2021-11-03 05:08:11,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:08:11,318 INFO L276 IsEmpty]: Start isEmpty. Operand 31536 states and 45735 transitions. [2021-11-03 05:08:11,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-03 05:08:11,319 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:08:11,320 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:08:11,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-03 05:08:11,320 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:08:11,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:08:11,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1179398918, now seen corresponding path program 1 times [2021-11-03 05:08:11,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:08:11,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739376269] [2021-11-03 05:08:11,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:08:11,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:08:11,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:08:12,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:08:12,232 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:08:12,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739376269] [2021-11-03 05:08:12,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739376269] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:08:12,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:08:12,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-03 05:08:12,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854902930] [2021-11-03 05:08:12,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-03 05:08:12,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:08:12,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-03 05:08:12,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-11-03 05:08:12,234 INFO L87 Difference]: Start difference. First operand 31536 states and 45735 transitions. Second operand has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:08:20,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:08:20,051 INFO L93 Difference]: Finished difference Result 59185 states and 85847 transitions. [2021-11-03 05:08:20,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-03 05:08:20,058 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-03 05:08:20,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:08:20,139 INFO L225 Difference]: With dead ends: 59185 [2021-11-03 05:08:20,139 INFO L226 Difference]: Without dead ends: 59183 [2021-11-03 05:08:20,151 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=305, Invalid=885, Unknown=0, NotChecked=0, Total=1190 [2021-11-03 05:08:20,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59183 states. [2021-11-03 05:08:23,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59183 to 31551. [2021-11-03 05:08:23,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31551 states, 31550 states have (on average 1.45026941362916) internal successors, (45756), 31550 states have internal predecessors, (45756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:08:23,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31551 states to 31551 states and 45756 transitions. [2021-11-03 05:08:23,906 INFO L78 Accepts]: Start accepts. Automaton has 31551 states and 45756 transitions. Word has length 85 [2021-11-03 05:08:23,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:08:23,907 INFO L470 AbstractCegarLoop]: Abstraction has 31551 states and 45756 transitions. [2021-11-03 05:08:23,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:08:23,907 INFO L276 IsEmpty]: Start isEmpty. Operand 31551 states and 45756 transitions. [2021-11-03 05:08:23,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-03 05:08:23,909 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:08:23,909 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:08:23,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-03 05:08:23,909 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:08:23,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:08:23,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1627169510, now seen corresponding path program 1 times [2021-11-03 05:08:23,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:08:23,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300180906] [2021-11-03 05:08:23,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:08:23,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:08:23,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:08:24,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:08:24,732 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:08:24,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300180906] [2021-11-03 05:08:24,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300180906] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:08:24,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:08:24,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-03 05:08:24,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364959994] [2021-11-03 05:08:24,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-03 05:08:24,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:08:24,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-03 05:08:24,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-11-03 05:08:24,734 INFO L87 Difference]: Start difference. First operand 31551 states and 45756 transitions. Second operand has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:08:31,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:08:31,579 INFO L93 Difference]: Finished difference Result 60899 states and 88300 transitions. [2021-11-03 05:08:31,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-03 05:08:31,580 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-03 05:08:31,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:08:31,658 INFO L225 Difference]: With dead ends: 60899 [2021-11-03 05:08:31,658 INFO L226 Difference]: Without dead ends: 56289 [2021-11-03 05:08:31,674 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=273, Invalid=849, Unknown=0, NotChecked=0, Total=1122 [2021-11-03 05:08:31,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56289 states. [2021-11-03 05:08:36,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56289 to 33385. [2021-11-03 05:08:36,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33385 states, 33384 states have (on average 1.4497064462017732) internal successors, (48397), 33384 states have internal predecessors, (48397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:08:36,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33385 states to 33385 states and 48397 transitions. [2021-11-03 05:08:36,065 INFO L78 Accepts]: Start accepts. Automaton has 33385 states and 48397 transitions. Word has length 85 [2021-11-03 05:08:36,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:08:36,066 INFO L470 AbstractCegarLoop]: Abstraction has 33385 states and 48397 transitions. [2021-11-03 05:08:36,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:08:36,066 INFO L276 IsEmpty]: Start isEmpty. Operand 33385 states and 48397 transitions. [2021-11-03 05:08:36,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-03 05:08:36,067 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:08:36,067 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:08:36,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-03 05:08:36,067 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:08:36,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:08:36,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1125221102, now seen corresponding path program 1 times [2021-11-03 05:08:36,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:08:36,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727260790] [2021-11-03 05:08:36,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:08:36,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:08:36,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:08:36,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:08:36,846 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:08:36,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727260790] [2021-11-03 05:08:36,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727260790] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:08:36,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:08:36,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-03 05:08:36,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208387414] [2021-11-03 05:08:36,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-03 05:08:36,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:08:36,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-03 05:08:36,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-11-03 05:08:36,848 INFO L87 Difference]: Start difference. First operand 33385 states and 48397 transitions. Second operand has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:08:46,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:08:46,143 INFO L93 Difference]: Finished difference Result 70107 states and 101730 transitions. [2021-11-03 05:08:46,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-03 05:08:46,144 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-03 05:08:46,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:08:46,238 INFO L225 Difference]: With dead ends: 70107 [2021-11-03 05:08:46,238 INFO L226 Difference]: Without dead ends: 70105 [2021-11-03 05:08:46,251 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2021-11-03 05:08:46,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70105 states. [2021-11-03 05:08:51,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70105 to 33388. [2021-11-03 05:08:51,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33388 states, 33387 states have (on average 1.4496660376793362) internal successors, (48400), 33387 states have internal predecessors, (48400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:08:51,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33388 states to 33388 states and 48400 transitions. [2021-11-03 05:08:51,252 INFO L78 Accepts]: Start accepts. Automaton has 33388 states and 48400 transitions. Word has length 86 [2021-11-03 05:08:51,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:08:51,252 INFO L470 AbstractCegarLoop]: Abstraction has 33388 states and 48400 transitions. [2021-11-03 05:08:51,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:08:51,252 INFO L276 IsEmpty]: Start isEmpty. Operand 33388 states and 48400 transitions. [2021-11-03 05:08:51,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-03 05:08:51,254 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:08:51,254 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:08:51,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-03 05:08:51,254 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:08:51,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:08:51,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1246077710, now seen corresponding path program 1 times [2021-11-03 05:08:51,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:08:51,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369617752] [2021-11-03 05:08:51,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:08:51,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:08:51,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:08:52,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:08:52,039 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:08:52,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369617752] [2021-11-03 05:08:52,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369617752] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:08:52,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:08:52,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-03 05:08:52,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056595846] [2021-11-03 05:08:52,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-03 05:08:52,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:08:52,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-03 05:08:52,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-11-03 05:08:52,041 INFO L87 Difference]: Start difference. First operand 33388 states and 48400 transitions. Second operand has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:09:01,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:09:01,707 INFO L93 Difference]: Finished difference Result 67459 states and 98056 transitions. [2021-11-03 05:09:01,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-03 05:09:01,708 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-03 05:09:01,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:09:01,795 INFO L225 Difference]: With dead ends: 67459 [2021-11-03 05:09:01,795 INFO L226 Difference]: Without dead ends: 67457 [2021-11-03 05:09:01,806 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-11-03 05:09:01,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67457 states.