./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58998b1a-1e8b-41ad-bbf9-4e5b30f078fd/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58998b1a-1e8b-41ad-bbf9-4e5b30f078fd/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58998b1a-1e8b-41ad-bbf9-4e5b30f078fd/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58998b1a-1e8b-41ad-bbf9-4e5b30f078fd/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58998b1a-1e8b-41ad-bbf9-4e5b30f078fd/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58998b1a-1e8b-41ad-bbf9-4e5b30f078fd/bin/utaipan-eEHZpOm5b7 --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 c39b660f273ecbdfa60a013e46dad0637949d26902d1f41ae3834ad8e3310564 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:54:51,470 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:54:51,473 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:54:51,532 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:54:51,533 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:54:51,537 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:54:51,539 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:54:51,543 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:54:51,546 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:54:51,551 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:54:51,552 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:54:51,554 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:54:51,555 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:54:51,557 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:54:51,559 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:54:51,567 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:54:51,569 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:54:51,570 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:54:51,573 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:54:51,584 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:54:51,586 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:54:51,588 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:54:51,591 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:54:51,593 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:54:51,602 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:54:51,602 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:54:51,603 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:54:51,605 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:54:51,605 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:54:51,607 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:54:51,607 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:54:51,608 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:54:51,610 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:54:51,611 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:54:51,613 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:54:51,613 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:54:51,614 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:54:51,614 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:54:51,615 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:54:51,616 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:54:51,616 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:54:51,618 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58998b1a-1e8b-41ad-bbf9-4e5b30f078fd/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:54:51,663 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:54:51,664 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:54:51,664 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:54:51,665 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:54:51,665 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:54:51,666 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:54:51,666 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:54:51,666 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:54:51,666 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:54:51,667 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:54:51,668 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:54:51,668 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:54:51,668 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:54:51,668 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:54:51,669 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:54:51,669 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:54:51,669 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:54:51,669 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:54:51,670 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:54:51,670 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:54:51,671 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:54:51,671 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:54:51,671 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:54:51,671 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:54:51,671 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:54:51,672 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:54:51,673 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:54:51,674 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:54:51,674 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:54:51,674 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:54:51,674 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:54:51,675 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:54:51,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:54:51,675 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:54:51,675 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:54:51,676 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:54:51,676 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:54:51,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:54:51,676 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:54:51,676 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:54:51,677 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:54:51,677 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_58998b1a-1e8b-41ad-bbf9-4e5b30f078fd/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58998b1a-1e8b-41ad-bbf9-4e5b30f078fd/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c39b660f273ecbdfa60a013e46dad0637949d26902d1f41ae3834ad8e3310564 [2021-11-25 18:54:51,969 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:54:52,003 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:54:52,005 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:54:52,007 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:54:52,007 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:54:52,009 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58998b1a-1e8b-41ad-bbf9-4e5b30f078fd/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2021-11-25 18:54:52,085 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58998b1a-1e8b-41ad-bbf9-4e5b30f078fd/bin/utaipan-eEHZpOm5b7/data/e68c247d1/b7b8c0747cda4339a4642b5629969b09/FLAG239177fe6 [2021-11-25 18:54:52,695 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:54:52,706 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58998b1a-1e8b-41ad-bbf9-4e5b30f078fd/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2021-11-25 18:54:52,724 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58998b1a-1e8b-41ad-bbf9-4e5b30f078fd/bin/utaipan-eEHZpOm5b7/data/e68c247d1/b7b8c0747cda4339a4642b5629969b09/FLAG239177fe6 [2021-11-25 18:54:52,941 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58998b1a-1e8b-41ad-bbf9-4e5b30f078fd/bin/utaipan-eEHZpOm5b7/data/e68c247d1/b7b8c0747cda4339a4642b5629969b09 [2021-11-25 18:54:52,945 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:54:52,947 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:54:52,952 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:54:52,952 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:54:52,955 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:54:52,956 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:54:52" (1/1) ... [2021-11-25 18:54:52,959 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1967e7f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:52, skipping insertion in model container [2021-11-25 18:54:52,960 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:54:52" (1/1) ... [2021-11-25 18:54:52,967 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:54:53,060 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:54:53,313 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58998b1a-1e8b-41ad-bbf9-4e5b30f078fd/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[7469,7482] [2021-11-25 18:54:53,356 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:54:53,367 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:54:53,416 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58998b1a-1e8b-41ad-bbf9-4e5b30f078fd/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[7469,7482] [2021-11-25 18:54:53,448 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:54:53,465 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:54:53,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:53 WrapperNode [2021-11-25 18:54:53,466 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:54:53,467 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:54:53,467 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:54:53,467 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:54:53,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:53" (1/1) ... [2021-11-25 18:54:53,486 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:53" (1/1) ... [2021-11-25 18:54:53,524 INFO L137 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 610 [2021-11-25 18:54:53,524 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:54:53,525 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:54:53,525 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:54:53,525 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:54:53,533 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:53" (1/1) ... [2021-11-25 18:54:53,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:53" (1/1) ... [2021-11-25 18:54:53,538 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:53" (1/1) ... [2021-11-25 18:54:53,538 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:53" (1/1) ... [2021-11-25 18:54:53,548 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:53" (1/1) ... [2021-11-25 18:54:53,555 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:53" (1/1) ... [2021-11-25 18:54:53,557 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:53" (1/1) ... [2021-11-25 18:54:53,562 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:54:53,563 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:54:53,563 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:54:53,563 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:54:53,568 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:53" (1/1) ... [2021-11-25 18:54:53,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:54:53,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58998b1a-1e8b-41ad-bbf9-4e5b30f078fd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:54:53,633 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58998b1a-1e8b-41ad-bbf9-4e5b30f078fd/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:54:53,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58998b1a-1e8b-41ad-bbf9-4e5b30f078fd/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:54:53,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:54:53,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:54:53,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:54:53,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:54:53,864 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:54:53,865 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:54:54,463 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:54:54,819 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:54:54,820 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 18:54:54,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:54:54 BoogieIcfgContainer [2021-11-25 18:54:54,823 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:54:54,825 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:54:54,825 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:54:54,828 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:54:54,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:54:52" (1/3) ... [2021-11-25 18:54:54,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@374e0173 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:54:54, skipping insertion in model container [2021-11-25 18:54:54,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:53" (2/3) ... [2021-11-25 18:54:54,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@374e0173 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:54:54, skipping insertion in model container [2021-11-25 18:54:54,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:54:54" (3/3) ... [2021-11-25 18:54:54,834 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2021-11-25 18:54:54,840 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:54:54,840 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:54:54,905 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:54:54,914 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 [2021-11-25 18:54:54,914 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:54:54,936 INFO L276 IsEmpty]: Start isEmpty. Operand has 121 states, 119 states have (on average 1.6890756302521008) internal successors, (201), 120 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:54:54,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-25 18:54:54,952 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:54:54,953 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:54:54,953 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:54:54,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:54:54,962 INFO L85 PathProgramCache]: Analyzing trace with hash -569731817, now seen corresponding path program 1 times [2021-11-25 18:54:54,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:54:54,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12958348] [2021-11-25 18:54:54,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:54:54,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:54:55,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:54:55,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:54:55,464 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:54:55,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12958348] [2021-11-25 18:54:55,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12958348] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:54:55,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:54:55,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:54:55,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477465336] [2021-11-25 18:54:55,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:54:55,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:54:55,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:54:55,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:54:55,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:54:55,503 INFO L87 Difference]: Start difference. First operand has 121 states, 119 states have (on average 1.6890756302521008) internal successors, (201), 120 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:54:55,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:54:55,756 INFO L93 Difference]: Finished difference Result 328 states and 524 transitions. [2021-11-25 18:54:55,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:54:55,770 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-25 18:54:55,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:54:55,787 INFO L225 Difference]: With dead ends: 328 [2021-11-25 18:54:55,787 INFO L226 Difference]: Without dead ends: 244 [2021-11-25 18:54:55,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:54:55,795 INFO L933 BasicCegarLoop]: 328 mSDtfsCounter, 362 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:54:55,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 692 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:54:55,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-11-25 18:54:55,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 240. [2021-11-25 18:54:55,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.3723849372384938) internal successors, (328), 239 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:54:55,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 328 transitions. [2021-11-25 18:54:55,893 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 328 transitions. Word has length 43 [2021-11-25 18:54:55,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:54:55,894 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 328 transitions. [2021-11-25 18:54:55,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:54:55,894 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 328 transitions. [2021-11-25 18:54:55,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-25 18:54:55,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:54:55,896 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:54:55,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:54:55,897 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:54:55,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:54:55,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1859584073, now seen corresponding path program 1 times [2021-11-25 18:54:55,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:54:55,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465586614] [2021-11-25 18:54:55,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:54:55,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:54:55,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:54:56,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:54:56,034 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:54:56,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465586614] [2021-11-25 18:54:56,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465586614] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:54:56,035 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:54:56,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:54:56,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448441908] [2021-11-25 18:54:56,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:54:56,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:54:56,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:54:56,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:54:56,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:54:56,040 INFO L87 Difference]: Start difference. First operand 240 states and 328 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:54:56,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:54:56,302 INFO L93 Difference]: Finished difference Result 531 states and 737 transitions. [2021-11-25 18:54:56,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:54:56,303 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-25 18:54:56,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:54:56,310 INFO L225 Difference]: With dead ends: 531 [2021-11-25 18:54:56,310 INFO L226 Difference]: Without dead ends: 318 [2021-11-25 18:54:56,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:54:56,321 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 416 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:54:56,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 167 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:54:56,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-11-25 18:54:56,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 316. [2021-11-25 18:54:56,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 1.3746031746031746) internal successors, (433), 315 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:54:56,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 433 transitions. [2021-11-25 18:54:56,400 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 433 transitions. Word has length 44 [2021-11-25 18:54:56,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:54:56,405 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 433 transitions. [2021-11-25 18:54:56,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:54:56,405 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 433 transitions. [2021-11-25 18:54:56,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-25 18:54:56,410 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:54:56,410 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:54:56,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:54:56,411 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:54:56,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:54:56,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1490531816, now seen corresponding path program 1 times [2021-11-25 18:54:56,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:54:56,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863942477] [2021-11-25 18:54:56,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:54:56,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:54:56,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:54:56,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:54:56,588 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:54:56,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863942477] [2021-11-25 18:54:56,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863942477] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:54:56,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:54:56,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:54:56,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306652914] [2021-11-25 18:54:56,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:54:56,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:54:56,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:54:56,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:54:56,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:54:56,593 INFO L87 Difference]: Start difference. First operand 316 states and 433 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:54:56,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:54:56,817 INFO L93 Difference]: Finished difference Result 765 states and 1070 transitions. [2021-11-25 18:54:56,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:54:56,818 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-25 18:54:56,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:54:56,823 INFO L225 Difference]: With dead ends: 765 [2021-11-25 18:54:56,823 INFO L226 Difference]: Without dead ends: 492 [2021-11-25 18:54:56,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:54:56,833 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 395 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:54:56,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 178 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:54:56,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-11-25 18:54:56,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 490. [2021-11-25 18:54:56,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 1.3865030674846626) internal successors, (678), 489 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:54:56,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 678 transitions. [2021-11-25 18:54:56,892 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 678 transitions. Word has length 44 [2021-11-25 18:54:56,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:54:56,892 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 678 transitions. [2021-11-25 18:54:56,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:54:56,893 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 678 transitions. [2021-11-25 18:54:56,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-25 18:54:56,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:54:56,896 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:54:56,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 18:54:56,897 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:54:56,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:54:56,898 INFO L85 PathProgramCache]: Analyzing trace with hash -448842201, now seen corresponding path program 1 times [2021-11-25 18:54:56,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:54:56,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101801503] [2021-11-25 18:54:56,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:54:56,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:54:56,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:54:56,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:54:56,998 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:54:56,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101801503] [2021-11-25 18:54:56,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101801503] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:54:56,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:54:56,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:54:56,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914298614] [2021-11-25 18:54:56,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:54:57,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:54:57,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:54:57,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:54:57,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:54:57,001 INFO L87 Difference]: Start difference. First operand 490 states and 678 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:54:57,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:54:57,270 INFO L93 Difference]: Finished difference Result 1267 states and 1784 transitions. [2021-11-25 18:54:57,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:54:57,271 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-25 18:54:57,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:54:57,277 INFO L225 Difference]: With dead ends: 1267 [2021-11-25 18:54:57,277 INFO L226 Difference]: Without dead ends: 840 [2021-11-25 18:54:57,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:54:57,285 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 378 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:54:57,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [378 Valid, 186 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:54:57,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2021-11-25 18:54:57,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 838. [2021-11-25 18:54:57,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 837 states have (on average 1.3954599761051374) internal successors, (1168), 837 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:54:57,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1168 transitions. [2021-11-25 18:54:57,389 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1168 transitions. Word has length 44 [2021-11-25 18:54:57,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:54:57,391 INFO L470 AbstractCegarLoop]: Abstraction has 838 states and 1168 transitions. [2021-11-25 18:54:57,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:54:57,392 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1168 transitions. [2021-11-25 18:54:57,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-25 18:54:57,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:54:57,393 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:54:57,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 18:54:57,393 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:54:57,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:54:57,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1500601899, now seen corresponding path program 1 times [2021-11-25 18:54:57,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:54:57,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756623652] [2021-11-25 18:54:57,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:54:57,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:54:57,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:54:57,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:54:57,707 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:54:57,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756623652] [2021-11-25 18:54:57,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756623652] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:54:57,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:54:57,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-25 18:54:57,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483767163] [2021-11-25 18:54:57,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:54:57,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 18:54:57,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:54:57,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 18:54:57,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-25 18:54:57,711 INFO L87 Difference]: Start difference. First operand 838 states and 1168 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:54:58,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:54:58,746 INFO L93 Difference]: Finished difference Result 4663 states and 6639 transitions. [2021-11-25 18:54:58,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 18:54:58,747 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-25 18:54:58,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:54:58,773 INFO L225 Difference]: With dead ends: 4663 [2021-11-25 18:54:58,773 INFO L226 Difference]: Without dead ends: 3965 [2021-11-25 18:54:58,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-11-25 18:54:58,777 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 1471 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1471 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:54:58,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1471 Valid, 691 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:54:58,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3965 states. [2021-11-25 18:54:59,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3965 to 2483. [2021-11-25 18:54:59,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2483 states, 2482 states have (on average 1.3924254633360194) internal successors, (3456), 2482 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:54:59,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2483 states to 2483 states and 3456 transitions. [2021-11-25 18:54:59,148 INFO L78 Accepts]: Start accepts. Automaton has 2483 states and 3456 transitions. Word has length 45 [2021-11-25 18:54:59,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:54:59,149 INFO L470 AbstractCegarLoop]: Abstraction has 2483 states and 3456 transitions. [2021-11-25 18:54:59,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:54:59,150 INFO L276 IsEmpty]: Start isEmpty. Operand 2483 states and 3456 transitions. [2021-11-25 18:54:59,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-25 18:54:59,157 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:54:59,157 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:54:59,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 18:54:59,158 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:54:59,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:54:59,160 INFO L85 PathProgramCache]: Analyzing trace with hash 331686411, now seen corresponding path program 1 times [2021-11-25 18:54:59,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:54:59,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605683336] [2021-11-25 18:54:59,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:54:59,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:54:59,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:54:59,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:54:59,469 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:54:59,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605683336] [2021-11-25 18:54:59,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605683336] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:54:59,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:54:59,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-25 18:54:59,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869890300] [2021-11-25 18:54:59,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:54:59,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 18:54:59,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:54:59,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 18:54:59,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-25 18:54:59,472 INFO L87 Difference]: Start difference. First operand 2483 states and 3456 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:00,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:55:00,399 INFO L93 Difference]: Finished difference Result 4263 states and 5980 transitions. [2021-11-25 18:55:00,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 18:55:00,399 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-25 18:55:00,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:55:00,422 INFO L225 Difference]: With dead ends: 4263 [2021-11-25 18:55:00,422 INFO L226 Difference]: Without dead ends: 3787 [2021-11-25 18:55:00,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-11-25 18:55:00,425 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 1302 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1302 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:55:00,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1302 Valid, 871 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:55:00,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3787 states. [2021-11-25 18:55:00,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3787 to 3067. [2021-11-25 18:55:00,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3067 states, 3066 states have (on average 1.3842139595564253) internal successors, (4244), 3066 states have internal predecessors, (4244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:00,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3067 states to 3067 states and 4244 transitions. [2021-11-25 18:55:00,787 INFO L78 Accepts]: Start accepts. Automaton has 3067 states and 4244 transitions. Word has length 45 [2021-11-25 18:55:00,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:55:00,788 INFO L470 AbstractCegarLoop]: Abstraction has 3067 states and 4244 transitions. [2021-11-25 18:55:00,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:00,788 INFO L276 IsEmpty]: Start isEmpty. Operand 3067 states and 4244 transitions. [2021-11-25 18:55:00,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-25 18:55:00,789 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:55:00,789 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:55:00,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 18:55:00,789 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:55:00,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:55:00,790 INFO L85 PathProgramCache]: Analyzing trace with hash -2052968981, now seen corresponding path program 1 times [2021-11-25 18:55:00,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:55:00,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652227385] [2021-11-25 18:55:00,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:00,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:55:00,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:01,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:55:01,057 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:55:01,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652227385] [2021-11-25 18:55:01,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652227385] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:55:01,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:55:01,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-25 18:55:01,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625342140] [2021-11-25 18:55:01,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:55:01,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 18:55:01,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:55:01,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 18:55:01,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-25 18:55:01,059 INFO L87 Difference]: Start difference. First operand 3067 states and 4244 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:02,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:55:02,242 INFO L93 Difference]: Finished difference Result 4801 states and 6657 transitions. [2021-11-25 18:55:02,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 18:55:02,243 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-25 18:55:02,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:55:02,271 INFO L225 Difference]: With dead ends: 4801 [2021-11-25 18:55:02,271 INFO L226 Difference]: Without dead ends: 4639 [2021-11-25 18:55:02,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2021-11-25 18:55:02,276 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 1093 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1093 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:55:02,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1093 Valid, 1074 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 18:55:02,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4639 states. [2021-11-25 18:55:02,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4639 to 3520. [2021-11-25 18:55:02,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3520 states, 3519 states have (on average 1.3813583404376244) internal successors, (4861), 3519 states have internal predecessors, (4861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:02,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3520 states to 3520 states and 4861 transitions. [2021-11-25 18:55:02,713 INFO L78 Accepts]: Start accepts. Automaton has 3520 states and 4861 transitions. Word has length 45 [2021-11-25 18:55:02,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:55:02,713 INFO L470 AbstractCegarLoop]: Abstraction has 3520 states and 4861 transitions. [2021-11-25 18:55:02,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:02,714 INFO L276 IsEmpty]: Start isEmpty. Operand 3520 states and 4861 transitions. [2021-11-25 18:55:02,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-25 18:55:02,714 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:55:02,714 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:55:02,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 18:55:02,715 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:55:02,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:55:02,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1352529439, now seen corresponding path program 1 times [2021-11-25 18:55:02,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:55:02,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499500230] [2021-11-25 18:55:02,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:02,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:55:02,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:03,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:55:03,050 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:55:03,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499500230] [2021-11-25 18:55:03,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499500230] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:55:03,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:55:03,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-25 18:55:03,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772203339] [2021-11-25 18:55:03,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:55:03,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 18:55:03,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:55:03,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 18:55:03,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:55:03,052 INFO L87 Difference]: Start difference. First operand 3520 states and 4861 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:04,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:55:04,024 INFO L93 Difference]: Finished difference Result 5547 states and 7680 transitions. [2021-11-25 18:55:04,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 18:55:04,025 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-25 18:55:04,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:55:04,056 INFO L225 Difference]: With dead ends: 5547 [2021-11-25 18:55:04,058 INFO L226 Difference]: Without dead ends: 5097 [2021-11-25 18:55:04,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2021-11-25 18:55:04,062 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 503 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:55:04,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 852 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:55:04,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5097 states. [2021-11-25 18:55:04,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5097 to 3811. [2021-11-25 18:55:04,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3811 states, 3810 states have (on average 1.3829396325459318) internal successors, (5269), 3810 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:04,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3811 states to 3811 states and 5269 transitions. [2021-11-25 18:55:04,534 INFO L78 Accepts]: Start accepts. Automaton has 3811 states and 5269 transitions. Word has length 47 [2021-11-25 18:55:04,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:55:04,534 INFO L470 AbstractCegarLoop]: Abstraction has 3811 states and 5269 transitions. [2021-11-25 18:55:04,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:04,535 INFO L276 IsEmpty]: Start isEmpty. Operand 3811 states and 5269 transitions. [2021-11-25 18:55:04,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-25 18:55:04,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:55:04,536 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:55:04,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 18:55:04,536 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:55:04,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:55:04,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1032125953, now seen corresponding path program 1 times [2021-11-25 18:55:04,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:55:04,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431060400] [2021-11-25 18:55:04,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:04,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:55:04,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:04,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:55:04,783 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:55:04,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431060400] [2021-11-25 18:55:04,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431060400] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:55:04,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:55:04,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-25 18:55:04,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535457780] [2021-11-25 18:55:04,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:55:04,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 18:55:04,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:55:04,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 18:55:04,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:55:04,785 INFO L87 Difference]: Start difference. First operand 3811 states and 5269 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:05,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:55:05,935 INFO L93 Difference]: Finished difference Result 7067 states and 9812 transitions. [2021-11-25 18:55:05,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 18:55:05,936 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-25 18:55:05,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:55:05,973 INFO L225 Difference]: With dead ends: 7067 [2021-11-25 18:55:05,973 INFO L226 Difference]: Without dead ends: 6369 [2021-11-25 18:55:05,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2021-11-25 18:55:05,978 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 407 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:55:05,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 999 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:55:05,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6369 states. [2021-11-25 18:55:06,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6369 to 3838. [2021-11-25 18:55:06,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3838 states, 3837 states have (on average 1.3802449830596821) internal successors, (5296), 3837 states have internal predecessors, (5296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:06,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 5296 transitions. [2021-11-25 18:55:06,503 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 5296 transitions. Word has length 47 [2021-11-25 18:55:06,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:55:06,504 INFO L470 AbstractCegarLoop]: Abstraction has 3838 states and 5296 transitions. [2021-11-25 18:55:06,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:06,504 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 5296 transitions. [2021-11-25 18:55:06,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-25 18:55:06,505 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:55:06,506 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:55:06,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 18:55:06,506 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:55:06,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:55:06,507 INFO L85 PathProgramCache]: Analyzing trace with hash 921521631, now seen corresponding path program 1 times [2021-11-25 18:55:06,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:55:06,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857646180] [2021-11-25 18:55:06,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:06,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:55:06,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:06,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:55:06,788 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:55:06,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857646180] [2021-11-25 18:55:06,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857646180] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:55:06,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:55:06,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-25 18:55:06,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822276222] [2021-11-25 18:55:06,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:55:06,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 18:55:06,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:55:06,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 18:55:06,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:55:06,791 INFO L87 Difference]: Start difference. First operand 3838 states and 5296 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:08,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:55:08,112 INFO L93 Difference]: Finished difference Result 8309 states and 11520 transitions. [2021-11-25 18:55:08,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 18:55:08,113 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-25 18:55:08,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:55:08,157 INFO L225 Difference]: With dead ends: 8309 [2021-11-25 18:55:08,158 INFO L226 Difference]: Without dead ends: 8155 [2021-11-25 18:55:08,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=160, Invalid=302, Unknown=0, NotChecked=0, Total=462 [2021-11-25 18:55:08,161 INFO L933 BasicCegarLoop]: 336 mSDtfsCounter, 494 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 1606 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:55:08,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 1606 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 18:55:08,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8155 states. [2021-11-25 18:55:08,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8155 to 3841. [2021-11-25 18:55:08,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3841 states, 3840 states have (on average 1.3799479166666666) internal successors, (5299), 3840 states have internal predecessors, (5299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:08,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3841 states to 3841 states and 5299 transitions. [2021-11-25 18:55:08,625 INFO L78 Accepts]: Start accepts. Automaton has 3841 states and 5299 transitions. Word has length 47 [2021-11-25 18:55:08,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:55:08,625 INFO L470 AbstractCegarLoop]: Abstraction has 3841 states and 5299 transitions. [2021-11-25 18:55:08,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:08,626 INFO L276 IsEmpty]: Start isEmpty. Operand 3841 states and 5299 transitions. [2021-11-25 18:55:08,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-25 18:55:08,626 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:55:08,627 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:55:08,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 18:55:08,627 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:55:08,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:55:08,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1395166925, now seen corresponding path program 1 times [2021-11-25 18:55:08,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:55:08,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635458007] [2021-11-25 18:55:08,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:08,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:55:08,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:08,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:55:08,673 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:55:08,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635458007] [2021-11-25 18:55:08,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635458007] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:55:08,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:55:08,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:55:08,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284195922] [2021-11-25 18:55:08,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:55:08,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:55:08,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:55:08,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:55:08,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:55:08,675 INFO L87 Difference]: Start difference. First operand 3841 states and 5299 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:09,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:55:09,107 INFO L93 Difference]: Finished difference Result 6810 states and 9449 transitions. [2021-11-25 18:55:09,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:55:09,107 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-25 18:55:09,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:55:09,116 INFO L225 Difference]: With dead ends: 6810 [2021-11-25 18:55:09,116 INFO L226 Difference]: Without dead ends: 3651 [2021-11-25 18:55:09,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:55:09,123 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 85 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:55:09,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 271 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:55:09,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3651 states. [2021-11-25 18:55:09,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3651 to 3649. [2021-11-25 18:55:09,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3649 states, 3648 states have (on average 1.377467105263158) internal successors, (5025), 3648 states have internal predecessors, (5025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:09,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3649 states to 3649 states and 5025 transitions. [2021-11-25 18:55:09,535 INFO L78 Accepts]: Start accepts. Automaton has 3649 states and 5025 transitions. Word has length 48 [2021-11-25 18:55:09,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:55:09,535 INFO L470 AbstractCegarLoop]: Abstraction has 3649 states and 5025 transitions. [2021-11-25 18:55:09,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:09,535 INFO L276 IsEmpty]: Start isEmpty. Operand 3649 states and 5025 transitions. [2021-11-25 18:55:09,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-25 18:55:09,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:55:09,537 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:55:09,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 18:55:09,537 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:55:09,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:55:09,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1093497654, now seen corresponding path program 1 times [2021-11-25 18:55:09,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:55:09,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527714414] [2021-11-25 18:55:09,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:09,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:55:09,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:09,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:55:09,574 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:55:09,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527714414] [2021-11-25 18:55:09,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527714414] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:55:09,574 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:55:09,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:55:09,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109837181] [2021-11-25 18:55:09,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:55:09,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:55:09,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:55:09,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:55:09,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:55:09,576 INFO L87 Difference]: Start difference. First operand 3649 states and 5025 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:09,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:55:09,942 INFO L93 Difference]: Finished difference Result 6537 states and 9060 transitions. [2021-11-25 18:55:09,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:55:09,942 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-25 18:55:09,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:55:09,950 INFO L225 Difference]: With dead ends: 6537 [2021-11-25 18:55:09,950 INFO L226 Difference]: Without dead ends: 3504 [2021-11-25 18:55:09,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:55:09,956 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 78 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:55:09,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 271 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:55:09,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3504 states. [2021-11-25 18:55:10,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3504 to 3432. [2021-11-25 18:55:10,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3432 states, 3431 states have (on average 1.3762751384436025) internal successors, (4722), 3431 states have internal predecessors, (4722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:10,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3432 states to 3432 states and 4722 transitions. [2021-11-25 18:55:10,306 INFO L78 Accepts]: Start accepts. Automaton has 3432 states and 4722 transitions. Word has length 48 [2021-11-25 18:55:10,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:55:10,306 INFO L470 AbstractCegarLoop]: Abstraction has 3432 states and 4722 transitions. [2021-11-25 18:55:10,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:10,307 INFO L276 IsEmpty]: Start isEmpty. Operand 3432 states and 4722 transitions. [2021-11-25 18:55:10,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-25 18:55:10,307 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:55:10,308 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:55:10,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 18:55:10,308 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:55:10,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:55:10,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1595839245, now seen corresponding path program 1 times [2021-11-25 18:55:10,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:55:10,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041519116] [2021-11-25 18:55:10,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:10,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:55:10,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:12,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:55:12,339 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:55:12,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041519116] [2021-11-25 18:55:12,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041519116] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:55:12,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:55:12,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-11-25 18:55:12,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505324819] [2021-11-25 18:55:12,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:55:12,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-25 18:55:12,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:55:12,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-25 18:55:12,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-11-25 18:55:12,341 INFO L87 Difference]: Start difference. First operand 3432 states and 4722 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:16,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:55:16,370 INFO L93 Difference]: Finished difference Result 3922 states and 5398 transitions. [2021-11-25 18:55:16,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-25 18:55:16,370 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-25 18:55:16,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:55:16,379 INFO L225 Difference]: With dead ends: 3922 [2021-11-25 18:55:16,379 INFO L226 Difference]: Without dead ends: 3776 [2021-11-25 18:55:16,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=538, Invalid=1442, Unknown=0, NotChecked=0, Total=1980 [2021-11-25 18:55:16,382 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 758 mSDsluCounter, 2346 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 2576 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:55:16,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [758 Valid, 2576 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1269 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-25 18:55:16,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3776 states. [2021-11-25 18:55:16,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3776 to 3438. [2021-11-25 18:55:16,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3438 states, 3437 states have (on average 1.3759092231597323) internal successors, (4729), 3437 states have internal predecessors, (4729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:16,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3438 states to 3438 states and 4729 transitions. [2021-11-25 18:55:16,830 INFO L78 Accepts]: Start accepts. Automaton has 3438 states and 4729 transitions. Word has length 49 [2021-11-25 18:55:16,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:55:16,830 INFO L470 AbstractCegarLoop]: Abstraction has 3438 states and 4729 transitions. [2021-11-25 18:55:16,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:16,832 INFO L276 IsEmpty]: Start isEmpty. Operand 3438 states and 4729 transitions. [2021-11-25 18:55:16,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 18:55:16,835 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:55:16,835 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:55:16,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 18:55:16,835 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:55:16,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:55:16,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1265773300, now seen corresponding path program 1 times [2021-11-25 18:55:16,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:55:16,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819487693] [2021-11-25 18:55:16,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:16,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:55:16,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:16,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:55:16,868 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:55:16,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819487693] [2021-11-25 18:55:16,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819487693] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:55:16,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:55:16,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:55:16,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480960832] [2021-11-25 18:55:16,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:55:16,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:55:16,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:55:16,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:55:16,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:55:16,870 INFO L87 Difference]: Start difference. First operand 3438 states and 4729 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:17,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:55:17,203 INFO L93 Difference]: Finished difference Result 6058 states and 8367 transitions. [2021-11-25 18:55:17,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:55:17,204 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-25 18:55:17,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:55:17,213 INFO L225 Difference]: With dead ends: 6058 [2021-11-25 18:55:17,213 INFO L226 Difference]: Without dead ends: 3241 [2021-11-25 18:55:17,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:55:17,223 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 84 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:55:17,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 250 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:55:17,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3241 states. [2021-11-25 18:55:17,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3241 to 3239. [2021-11-25 18:55:17,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3239 states, 3238 states have (on average 1.3730697961704756) internal successors, (4446), 3238 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:17,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3239 states to 3239 states and 4446 transitions. [2021-11-25 18:55:17,766 INFO L78 Accepts]: Start accepts. Automaton has 3239 states and 4446 transitions. Word has length 50 [2021-11-25 18:55:17,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:55:17,766 INFO L470 AbstractCegarLoop]: Abstraction has 3239 states and 4446 transitions. [2021-11-25 18:55:17,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:17,767 INFO L276 IsEmpty]: Start isEmpty. Operand 3239 states and 4446 transitions. [2021-11-25 18:55:17,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-25 18:55:17,768 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:55:17,769 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:55:17,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-25 18:55:17,769 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:55:17,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:55:17,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1911473133, now seen corresponding path program 1 times [2021-11-25 18:55:17,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:55:17,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183346833] [2021-11-25 18:55:17,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:17,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:55:17,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:17,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:55:17,843 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:55:17,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183346833] [2021-11-25 18:55:17,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183346833] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:55:17,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:55:17,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:55:17,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866357232] [2021-11-25 18:55:17,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:55:17,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:55:17,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:55:17,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:55:17,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:55:17,846 INFO L87 Difference]: Start difference. First operand 3239 states and 4446 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:18,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:55:18,369 INFO L93 Difference]: Finished difference Result 6966 states and 9624 transitions. [2021-11-25 18:55:18,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:55:18,369 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-25 18:55:18,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:55:18,379 INFO L225 Difference]: With dead ends: 6966 [2021-11-25 18:55:18,379 INFO L226 Difference]: Without dead ends: 4151 [2021-11-25 18:55:18,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:55:18,385 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 81 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:55:18,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 296 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:55:18,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2021-11-25 18:55:18,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 3807. [2021-11-25 18:55:18,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3807 states, 3806 states have (on average 1.362322648449816) internal successors, (5185), 3806 states have internal predecessors, (5185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:18,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3807 states to 3807 states and 5185 transitions. [2021-11-25 18:55:18,816 INFO L78 Accepts]: Start accepts. Automaton has 3807 states and 5185 transitions. Word has length 55 [2021-11-25 18:55:18,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:55:18,816 INFO L470 AbstractCegarLoop]: Abstraction has 3807 states and 5185 transitions. [2021-11-25 18:55:18,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:18,817 INFO L276 IsEmpty]: Start isEmpty. Operand 3807 states and 5185 transitions. [2021-11-25 18:55:18,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-25 18:55:18,818 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:55:18,818 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:55:18,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-25 18:55:18,819 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:55:18,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:55:18,819 INFO L85 PathProgramCache]: Analyzing trace with hash 663479602, now seen corresponding path program 1 times [2021-11-25 18:55:18,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:55:18,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999805756] [2021-11-25 18:55:18,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:18,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:55:18,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:18,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:55:18,861 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:55:18,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999805756] [2021-11-25 18:55:18,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999805756] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:55:18,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:55:18,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:55:18,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741682495] [2021-11-25 18:55:18,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:55:18,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:55:18,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:55:18,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:55:18,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:55:18,864 INFO L87 Difference]: Start difference. First operand 3807 states and 5185 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:19,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:55:19,206 INFO L93 Difference]: Finished difference Result 6537 states and 8915 transitions. [2021-11-25 18:55:19,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:55:19,207 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-25 18:55:19,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:55:19,215 INFO L225 Difference]: With dead ends: 6537 [2021-11-25 18:55:19,215 INFO L226 Difference]: Without dead ends: 3442 [2021-11-25 18:55:19,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:55:19,221 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 73 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:55:19,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 302 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:55:19,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3442 states. [2021-11-25 18:55:19,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3442 to 3440. [2021-11-25 18:55:19,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3440 states, 3439 states have (on average 1.3451584763012503) internal successors, (4626), 3439 states have internal predecessors, (4626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:19,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3440 states to 3440 states and 4626 transitions. [2021-11-25 18:55:19,834 INFO L78 Accepts]: Start accepts. Automaton has 3440 states and 4626 transitions. Word has length 58 [2021-11-25 18:55:19,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:55:19,835 INFO L470 AbstractCegarLoop]: Abstraction has 3440 states and 4626 transitions. [2021-11-25 18:55:19,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:19,835 INFO L276 IsEmpty]: Start isEmpty. Operand 3440 states and 4626 transitions. [2021-11-25 18:55:19,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-25 18:55:19,837 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:55:19,837 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:55:19,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-25 18:55:19,838 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:55:19,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:55:19,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1631752878, now seen corresponding path program 1 times [2021-11-25 18:55:19,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:55:19,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549187363] [2021-11-25 18:55:19,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:19,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:55:19,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:19,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:55:19,892 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:55:19,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549187363] [2021-11-25 18:55:19,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549187363] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:55:19,893 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:55:19,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:55:19,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498837929] [2021-11-25 18:55:19,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:55:19,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:55:19,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:55:19,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:55:19,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:55:19,895 INFO L87 Difference]: Start difference. First operand 3440 states and 4626 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:20,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:55:20,406 INFO L93 Difference]: Finished difference Result 8092 states and 10966 transitions. [2021-11-25 18:55:20,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:55:20,406 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-25 18:55:20,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:55:20,412 INFO L225 Difference]: With dead ends: 8092 [2021-11-25 18:55:20,412 INFO L226 Difference]: Without dead ends: 4955 [2021-11-25 18:55:20,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:55:20,419 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 77 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:55:20,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 278 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:55:20,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4955 states. [2021-11-25 18:55:21,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4955 to 4395. [2021-11-25 18:55:21,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4395 states, 4394 states have (on average 1.3297678652708238) internal successors, (5843), 4394 states have internal predecessors, (5843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:21,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4395 states to 4395 states and 5843 transitions. [2021-11-25 18:55:21,068 INFO L78 Accepts]: Start accepts. Automaton has 4395 states and 5843 transitions. Word has length 58 [2021-11-25 18:55:21,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:55:21,069 INFO L470 AbstractCegarLoop]: Abstraction has 4395 states and 5843 transitions. [2021-11-25 18:55:21,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:21,072 INFO L276 IsEmpty]: Start isEmpty. Operand 4395 states and 5843 transitions. [2021-11-25 18:55:21,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-25 18:55:21,076 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:55:21,076 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:55:21,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-25 18:55:21,076 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:55:21,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:55:21,077 INFO L85 PathProgramCache]: Analyzing trace with hash -540321193, now seen corresponding path program 1 times [2021-11-25 18:55:21,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:55:21,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236739538] [2021-11-25 18:55:21,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:21,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:55:21,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:21,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:55:21,123 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:55:21,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236739538] [2021-11-25 18:55:21,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236739538] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:55:21,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:55:21,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:55:21,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502321104] [2021-11-25 18:55:21,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:55:21,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:55:21,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:55:21,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:55:21,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:55:21,126 INFO L87 Difference]: Start difference. First operand 4395 states and 5843 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:21,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:55:21,672 INFO L93 Difference]: Finished difference Result 6738 states and 8967 transitions. [2021-11-25 18:55:21,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:55:21,673 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-25 18:55:21,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:55:21,678 INFO L225 Difference]: With dead ends: 6738 [2021-11-25 18:55:21,678 INFO L226 Difference]: Without dead ends: 4715 [2021-11-25 18:55:21,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:55:21,682 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 73 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:55:21,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 315 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:55:21,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4715 states. [2021-11-25 18:55:22,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4715 to 4713. [2021-11-25 18:55:22,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4713 states, 4712 states have (on average 1.3176994906621393) internal successors, (6209), 4712 states have internal predecessors, (6209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:22,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4713 states to 4713 states and 6209 transitions. [2021-11-25 18:55:22,170 INFO L78 Accepts]: Start accepts. Automaton has 4713 states and 6209 transitions. Word has length 61 [2021-11-25 18:55:22,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:55:22,171 INFO L470 AbstractCegarLoop]: Abstraction has 4713 states and 6209 transitions. [2021-11-25 18:55:22,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:22,171 INFO L276 IsEmpty]: Start isEmpty. Operand 4713 states and 6209 transitions. [2021-11-25 18:55:22,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-25 18:55:22,173 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:55:22,173 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:55:22,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-25 18:55:22,174 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:55:22,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:55:22,174 INFO L85 PathProgramCache]: Analyzing trace with hash -657152457, now seen corresponding path program 1 times [2021-11-25 18:55:22,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:55:22,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90866645] [2021-11-25 18:55:22,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:22,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:55:22,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:22,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:55:22,226 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:55:22,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90866645] [2021-11-25 18:55:22,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90866645] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:55:22,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:55:22,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:55:22,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293184813] [2021-11-25 18:55:22,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:55:22,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:55:22,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:55:22,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:55:22,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:55:22,229 INFO L87 Difference]: Start difference. First operand 4713 states and 6209 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:22,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:55:22,969 INFO L93 Difference]: Finished difference Result 11345 states and 15044 transitions. [2021-11-25 18:55:22,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:55:22,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-25 18:55:22,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:55:22,979 INFO L225 Difference]: With dead ends: 11345 [2021-11-25 18:55:22,980 INFO L226 Difference]: Without dead ends: 6856 [2021-11-25 18:55:22,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:55:22,986 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 72 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:55:22,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 259 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:55:22,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6856 states. [2021-11-25 18:55:23,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6856 to 6231. [2021-11-25 18:55:23,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6231 states, 6230 states have (on average 1.3043338683788122) internal successors, (8126), 6230 states have internal predecessors, (8126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:23,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6231 states to 6231 states and 8126 transitions. [2021-11-25 18:55:23,633 INFO L78 Accepts]: Start accepts. Automaton has 6231 states and 8126 transitions. Word has length 61 [2021-11-25 18:55:23,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:55:23,634 INFO L470 AbstractCegarLoop]: Abstraction has 6231 states and 8126 transitions. [2021-11-25 18:55:23,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:23,634 INFO L276 IsEmpty]: Start isEmpty. Operand 6231 states and 8126 transitions. [2021-11-25 18:55:23,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-25 18:55:23,636 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:55:23,636 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:55:23,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-25 18:55:23,637 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:55:23,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:55:23,637 INFO L85 PathProgramCache]: Analyzing trace with hash -59629605, now seen corresponding path program 1 times [2021-11-25 18:55:23,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:55:23,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431708275] [2021-11-25 18:55:23,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:23,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:55:23,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:23,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:55:23,717 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:55:23,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431708275] [2021-11-25 18:55:23,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431708275] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:55:23,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:55:23,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 18:55:23,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163197941] [2021-11-25 18:55:23,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:55:23,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:55:23,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:55:23,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:55:23,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:55:23,719 INFO L87 Difference]: Start difference. First operand 6231 states and 8126 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:24,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:55:24,978 INFO L93 Difference]: Finished difference Result 9107 states and 11864 transitions. [2021-11-25 18:55:24,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 18:55:24,978 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-25 18:55:24,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:55:24,987 INFO L225 Difference]: With dead ends: 9107 [2021-11-25 18:55:24,987 INFO L226 Difference]: Without dead ends: 9105 [2021-11-25 18:55:24,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:55:24,990 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 272 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:55:24,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 840 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:55:24,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9105 states. [2021-11-25 18:55:25,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9105 to 7900. [2021-11-25 18:55:25,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7900 states, 7899 states have (on average 1.3016837574376503) internal successors, (10282), 7899 states have internal predecessors, (10282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:25,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7900 states to 7900 states and 10282 transitions. [2021-11-25 18:55:25,942 INFO L78 Accepts]: Start accepts. Automaton has 7900 states and 10282 transitions. Word has length 66 [2021-11-25 18:55:25,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:55:25,943 INFO L470 AbstractCegarLoop]: Abstraction has 7900 states and 10282 transitions. [2021-11-25 18:55:25,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:25,943 INFO L276 IsEmpty]: Start isEmpty. Operand 7900 states and 10282 transitions. [2021-11-25 18:55:25,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-25 18:55:25,946 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:55:25,946 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:55:25,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-25 18:55:25,947 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:55:25,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:55:25,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1119321163, now seen corresponding path program 1 times [2021-11-25 18:55:25,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:55:25,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065319791] [2021-11-25 18:55:25,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:25,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:55:25,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:26,066 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:55:26,067 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:55:26,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065319791] [2021-11-25 18:55:26,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065319791] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:55:26,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:55:26,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:55:26,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277491813] [2021-11-25 18:55:26,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:55:26,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:55:26,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:55:26,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:55:26,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:55:26,069 INFO L87 Difference]: Start difference. First operand 7900 states and 10282 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:27,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:55:27,699 INFO L93 Difference]: Finished difference Result 19178 states and 25043 transitions. [2021-11-25 18:55:27,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 18:55:27,699 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-25 18:55:27,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:55:27,712 INFO L225 Difference]: With dead ends: 19178 [2021-11-25 18:55:27,712 INFO L226 Difference]: Without dead ends: 12009 [2021-11-25 18:55:27,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:55:27,721 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 911 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 911 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:55:27,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [911 Valid, 227 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:55:27,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12009 states. [2021-11-25 18:55:28,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12009 to 10222. [2021-11-25 18:55:28,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10222 states, 10221 states have (on average 1.284610116426964) internal successors, (13130), 10221 states have internal predecessors, (13130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:28,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10222 states to 10222 states and 13130 transitions. [2021-11-25 18:55:28,900 INFO L78 Accepts]: Start accepts. Automaton has 10222 states and 13130 transitions. Word has length 76 [2021-11-25 18:55:28,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:55:28,901 INFO L470 AbstractCegarLoop]: Abstraction has 10222 states and 13130 transitions. [2021-11-25 18:55:28,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:28,901 INFO L276 IsEmpty]: Start isEmpty. Operand 10222 states and 13130 transitions. [2021-11-25 18:55:28,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-25 18:55:28,905 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:55:28,905 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:55:28,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-25 18:55:28,905 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:55:28,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:55:28,906 INFO L85 PathProgramCache]: Analyzing trace with hash 498183728, now seen corresponding path program 1 times [2021-11-25 18:55:28,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:55:28,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301995566] [2021-11-25 18:55:28,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:28,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:55:28,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:29,487 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 18:55:29,487 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:55:29,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301995566] [2021-11-25 18:55:29,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301995566] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:55:29,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:55:29,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-25 18:55:29,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869890462] [2021-11-25 18:55:29,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:55:29,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 18:55:29,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:55:29,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 18:55:29,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:55:29,489 INFO L87 Difference]: Start difference. First operand 10222 states and 13130 transitions. Second operand has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 11 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:33,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:55:33,316 INFO L93 Difference]: Finished difference Result 17757 states and 22839 transitions. [2021-11-25 18:55:33,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 18:55:33,316 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 11 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-25 18:55:33,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:55:33,333 INFO L225 Difference]: With dead ends: 17757 [2021-11-25 18:55:33,334 INFO L226 Difference]: Without dead ends: 13734 [2021-11-25 18:55:33,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-11-25 18:55:33,342 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 834 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:55:33,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [834 Valid, 731 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 18:55:33,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13734 states. [2021-11-25 18:55:34,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13734 to 11114. [2021-11-25 18:55:34,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11114 states, 11113 states have (on average 1.2879510483217853) internal successors, (14313), 11113 states have internal predecessors, (14313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:34,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11114 states to 11114 states and 14313 transitions. [2021-11-25 18:55:34,989 INFO L78 Accepts]: Start accepts. Automaton has 11114 states and 14313 transitions. Word has length 76 [2021-11-25 18:55:34,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:55:34,990 INFO L470 AbstractCegarLoop]: Abstraction has 11114 states and 14313 transitions. [2021-11-25 18:55:34,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 11 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:34,990 INFO L276 IsEmpty]: Start isEmpty. Operand 11114 states and 14313 transitions. [2021-11-25 18:55:34,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-25 18:55:34,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:55:34,993 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:55:34,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-25 18:55:34,993 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:55:34,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:55:34,994 INFO L85 PathProgramCache]: Analyzing trace with hash 694416053, now seen corresponding path program 1 times [2021-11-25 18:55:34,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:55:34,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870805927] [2021-11-25 18:55:34,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:34,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:55:35,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:35,087 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 18:55:35,088 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:55:35,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870805927] [2021-11-25 18:55:35,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870805927] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:55:35,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:55:35,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:55:35,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516786265] [2021-11-25 18:55:35,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:55:35,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:55:35,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:55:35,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:55:35,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:55:35,090 INFO L87 Difference]: Start difference. First operand 11114 states and 14313 transitions. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:38,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:55:38,342 INFO L93 Difference]: Finished difference Result 29714 states and 38431 transitions. [2021-11-25 18:55:38,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 18:55:38,342 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-25 18:55:38,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:55:38,368 INFO L225 Difference]: With dead ends: 29714 [2021-11-25 18:55:38,368 INFO L226 Difference]: Without dead ends: 19337 [2021-11-25 18:55:38,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:55:38,383 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 828 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 828 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:55:38,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [828 Valid, 292 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:55:38,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19337 states. [2021-11-25 18:55:41,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19337 to 14688. [2021-11-25 18:55:41,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14688 states, 14687 states have (on average 1.2741199700415333) internal successors, (18713), 14687 states have internal predecessors, (18713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:41,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14688 states to 14688 states and 18713 transitions. [2021-11-25 18:55:41,053 INFO L78 Accepts]: Start accepts. Automaton has 14688 states and 18713 transitions. Word has length 76 [2021-11-25 18:55:41,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:55:41,053 INFO L470 AbstractCegarLoop]: Abstraction has 14688 states and 18713 transitions. [2021-11-25 18:55:41,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:41,054 INFO L276 IsEmpty]: Start isEmpty. Operand 14688 states and 18713 transitions. [2021-11-25 18:55:41,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-25 18:55:41,056 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:55:41,056 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:55:41,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-25 18:55:41,056 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:55:41,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:55:41,057 INFO L85 PathProgramCache]: Analyzing trace with hash 816928112, now seen corresponding path program 1 times [2021-11-25 18:55:41,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:55:41,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244158964] [2021-11-25 18:55:41,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:41,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:55:41,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:41,588 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:55:41,588 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:55:41,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244158964] [2021-11-25 18:55:41,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244158964] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:55:41,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167388765] [2021-11-25 18:55:41,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:41,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:55:41,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58998b1a-1e8b-41ad-bbf9-4e5b30f078fd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:55:41,590 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58998b1a-1e8b-41ad-bbf9-4e5b30f078fd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:55:41,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58998b1a-1e8b-41ad-bbf9-4e5b30f078fd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:55:41,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:41,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-25 18:55:41,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:55:44,347 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 18:55:44,347 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:55:44,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167388765] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:55:44,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:55:44,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [19] total 37 [2021-11-25 18:55:44,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871259257] [2021-11-25 18:55:44,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:55:44,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-25 18:55:44,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:55:44,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-25 18:55:44,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1201, Unknown=0, NotChecked=0, Total=1332 [2021-11-25 18:55:44,352 INFO L87 Difference]: Start difference. First operand 14688 states and 18713 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:52,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:55:52,056 INFO L93 Difference]: Finished difference Result 30373 states and 38843 transitions. [2021-11-25 18:55:52,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-25 18:55:52,056 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-25 18:55:52,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:55:52,092 INFO L225 Difference]: With dead ends: 30373 [2021-11-25 18:55:52,093 INFO L226 Difference]: Without dead ends: 25173 [2021-11-25 18:55:52,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=446, Invalid=2976, Unknown=0, NotChecked=0, Total=3422 [2021-11-25 18:55:52,103 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 1350 mSDsluCounter, 1822 mSDsCounter, 0 mSdLazyCounter, 2510 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1350 SdHoareTripleChecker+Valid, 2009 SdHoareTripleChecker+Invalid, 2582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 2510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:55:52,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1350 Valid, 2009 Invalid, 2582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 2510 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-25 18:55:52,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25173 states. [2021-11-25 18:55:55,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25173 to 15572. [2021-11-25 18:55:55,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15572 states, 15571 states have (on average 1.2733928456746515) internal successors, (19828), 15571 states have internal predecessors, (19828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:55,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15572 states to 15572 states and 19828 transitions. [2021-11-25 18:55:55,165 INFO L78 Accepts]: Start accepts. Automaton has 15572 states and 19828 transitions. Word has length 76 [2021-11-25 18:55:55,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:55:55,165 INFO L470 AbstractCegarLoop]: Abstraction has 15572 states and 19828 transitions. [2021-11-25 18:55:55,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:55,166 INFO L276 IsEmpty]: Start isEmpty. Operand 15572 states and 19828 transitions. [2021-11-25 18:55:55,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-25 18:55:55,169 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:55:55,169 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:55:55,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58998b1a-1e8b-41ad-bbf9-4e5b30f078fd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:55:55,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58998b1a-1e8b-41ad-bbf9-4e5b30f078fd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-25 18:55:55,395 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:55:55,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:55:55,396 INFO L85 PathProgramCache]: Analyzing trace with hash -944575092, now seen corresponding path program 1 times [2021-11-25 18:55:55,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:55:55,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488362199] [2021-11-25 18:55:55,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:55,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:55:55,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:55,942 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:55:55,942 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:55:55,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488362199] [2021-11-25 18:55:55,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488362199] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:55:55,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406787968] [2021-11-25 18:55:55,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:55,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:55:55,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58998b1a-1e8b-41ad-bbf9-4e5b30f078fd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:55:55,948 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58998b1a-1e8b-41ad-bbf9-4e5b30f078fd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:55:55,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58998b1a-1e8b-41ad-bbf9-4e5b30f078fd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:55:56,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:56,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-25 18:55:56,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:55:57,503 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:55:57,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:55:57,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406787968] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:55:57,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:55:57,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [17] total 29 [2021-11-25 18:55:57,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560025525] [2021-11-25 18:55:57,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:55:57,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 18:55:57,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:55:57,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 18:55:57,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2021-11-25 18:55:57,505 INFO L87 Difference]: Start difference. First operand 15572 states and 19828 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 13 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:56:01,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:56:01,831 INFO L93 Difference]: Finished difference Result 24424 states and 31355 transitions. [2021-11-25 18:56:01,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-25 18:56:01,840 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 13 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-25 18:56:01,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:56:01,869 INFO L225 Difference]: With dead ends: 24424 [2021-11-25 18:56:01,869 INFO L226 Difference]: Without dead ends: 19105 [2021-11-25 18:56:01,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=215, Invalid=1117, Unknown=0, NotChecked=0, Total=1332 [2021-11-25 18:56:01,881 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 1063 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1063 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:56:01,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1063 Valid, 743 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 18:56:01,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19105 states. [2021-11-25 18:56:05,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19105 to 18009. [2021-11-25 18:56:05,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18009 states, 18008 states have (on average 1.269213682807641) internal successors, (22856), 18008 states have internal predecessors, (22856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:56:05,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18009 states to 18009 states and 22856 transitions. [2021-11-25 18:56:05,170 INFO L78 Accepts]: Start accepts. Automaton has 18009 states and 22856 transitions. Word has length 76 [2021-11-25 18:56:05,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:56:05,170 INFO L470 AbstractCegarLoop]: Abstraction has 18009 states and 22856 transitions. [2021-11-25 18:56:05,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 13 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:56:05,170 INFO L276 IsEmpty]: Start isEmpty. Operand 18009 states and 22856 transitions. [2021-11-25 18:56:05,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-25 18:56:05,172 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:56:05,172 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:56:05,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58998b1a-1e8b-41ad-bbf9-4e5b30f078fd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:56:05,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58998b1a-1e8b-41ad-bbf9-4e5b30f078fd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-25 18:56:05,373 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:56:05,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:56:05,373 INFO L85 PathProgramCache]: Analyzing trace with hash -239378593, now seen corresponding path program 1 times [2021-11-25 18:56:05,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:56:05,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269560107] [2021-11-25 18:56:05,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:56:05,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:56:05,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:56:06,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:56:06,767 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:56:06,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269560107] [2021-11-25 18:56:06,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269560107] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:56:06,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931022219] [2021-11-25 18:56:06,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:56:06,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:56:06,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58998b1a-1e8b-41ad-bbf9-4e5b30f078fd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:56:06,769 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58998b1a-1e8b-41ad-bbf9-4e5b30f078fd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:56:06,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58998b1a-1e8b-41ad-bbf9-4e5b30f078fd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:56:06,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:56:06,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 18:56:06,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:56:07,605 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 18:56:07,605 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:56:07,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931022219] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:56:07,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:56:07,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [27] total 31 [2021-11-25 18:56:07,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079293945] [2021-11-25 18:56:07,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:56:07,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:56:07,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:56:07,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:56:07,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2021-11-25 18:56:07,609 INFO L87 Difference]: Start difference. First operand 18009 states and 22856 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:56:13,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:56:13,094 INFO L93 Difference]: Finished difference Result 40101 states and 51026 transitions. [2021-11-25 18:56:13,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 18:56:13,095 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-25 18:56:13,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:56:13,134 INFO L225 Difference]: With dead ends: 40101 [2021-11-25 18:56:13,135 INFO L226 Difference]: Without dead ends: 26645 [2021-11-25 18:56:13,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=163, Invalid=959, Unknown=0, NotChecked=0, Total=1122 [2021-11-25 18:56:13,150 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 537 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:56:13,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 421 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:56:13,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26645 states. [2021-11-25 18:56:17,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26645 to 22985. [2021-11-25 18:56:17,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22985 states, 22984 states have (on average 1.2632701009397842) internal successors, (29035), 22984 states have internal predecessors, (29035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:56:17,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22985 states to 22985 states and 29035 transitions. [2021-11-25 18:56:17,859 INFO L78 Accepts]: Start accepts. Automaton has 22985 states and 29035 transitions. Word has length 79 [2021-11-25 18:56:17,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:56:17,860 INFO L470 AbstractCegarLoop]: Abstraction has 22985 states and 29035 transitions. [2021-11-25 18:56:17,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:56:17,860 INFO L276 IsEmpty]: Start isEmpty. Operand 22985 states and 29035 transitions. [2021-11-25 18:56:17,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-25 18:56:17,862 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:56:17,862 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:56:17,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58998b1a-1e8b-41ad-bbf9-4e5b30f078fd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:56:18,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58998b1a-1e8b-41ad-bbf9-4e5b30f078fd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-25 18:56:18,067 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:56:18,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:56:18,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1703450150, now seen corresponding path program 1 times [2021-11-25 18:56:18,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:56:18,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105474078] [2021-11-25 18:56:18,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:56:18,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:56:18,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:56:18,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:56:18,444 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:56:18,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105474078] [2021-11-25 18:56:18,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105474078] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:56:18,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012608266] [2021-11-25 18:56:18,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:56:18,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:56:18,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58998b1a-1e8b-41ad-bbf9-4e5b30f078fd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:56:18,446 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58998b1a-1e8b-41ad-bbf9-4e5b30f078fd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:56:18,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58998b1a-1e8b-41ad-bbf9-4e5b30f078fd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:56:18,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:56:18,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-25 18:56:18,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:56:25,209 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:56:25,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:05:07,114 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:05:07,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012608266] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:05:07,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1258146452] [2021-11-25 19:05:07,146 INFO L159 IcfgInterpreter]: Started Sifa with 73 locations of interest [2021-11-25 19:05:07,146 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:05:07,150 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:05:07,156 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:05:07,156 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:05:07,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:05:07,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:05:07,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-25 19:05:07,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:05:07,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:05:07,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:05:07,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-25 19:05:25,493 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:06:18,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1258146452] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:06:18,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:06:18,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [15, 28, 29] total 126 [2021-11-25 19:06:18,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292271195] [2021-11-25 19:06:18,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:06:18,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-25 19:06:18,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:06:18,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-25 19:06:18,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2424, Invalid=13326, Unknown=0, NotChecked=0, Total=15750 [2021-11-25 19:06:18,092 INFO L87 Difference]: Start difference. First operand 22985 states and 29035 transitions. Second operand has 60 states, 60 states have (on average 1.25) internal successors, (75), 59 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:06:36,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:06:36,367 INFO L93 Difference]: Finished difference Result 30080 states and 37924 transitions. [2021-11-25 19:06:36,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-25 19:06:36,368 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.25) internal successors, (75), 59 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-25 19:06:36,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:06:36,395 INFO L225 Difference]: With dead ends: 30080 [2021-11-25 19:06:36,396 INFO L226 Difference]: Without dead ends: 23045 [2021-11-25 19:06:36,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 117 SyntacticMatches, 10 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8852 ImplicationChecksByTransitivity, 77.9s TimeCoverageRelationStatistics Valid=2513, Invalid=14779, Unknown=0, NotChecked=0, Total=17292 [2021-11-25 19:06:36,415 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 114 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 5196 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 5212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 5196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:06:36,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 438 Invalid, 5212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 5196 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2021-11-25 19:06:36,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23045 states. [2021-11-25 19:06:40,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23045 to 23034. [2021-11-25 19:06:40,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23034 states, 23033 states have (on average 1.2627968566838883) internal successors, (29086), 23033 states have internal predecessors, (29086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:06:40,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23034 states to 23034 states and 29086 transitions. [2021-11-25 19:06:40,795 INFO L78 Accepts]: Start accepts. Automaton has 23034 states and 29086 transitions. Word has length 79 [2021-11-25 19:06:40,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:06:40,796 INFO L470 AbstractCegarLoop]: Abstraction has 23034 states and 29086 transitions. [2021-11-25 19:06:40,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.25) internal successors, (75), 59 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:06:40,796 INFO L276 IsEmpty]: Start isEmpty. Operand 23034 states and 29086 transitions. [2021-11-25 19:06:40,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-25 19:06:40,798 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:06:40,798 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:06:40,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58998b1a-1e8b-41ad-bbf9-4e5b30f078fd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:06:40,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58998b1a-1e8b-41ad-bbf9-4e5b30f078fd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-25 19:06:40,999 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:06:40,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:06:40,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1395158391, now seen corresponding path program 1 times [2021-11-25 19:06:40,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:06:40,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235083300] [2021-11-25 19:06:40,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:06:41,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:06:41,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:06:41,618 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:06:41,618 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:06:41,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235083300] [2021-11-25 19:06:41,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235083300] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:06:41,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778746003] [2021-11-25 19:06:41,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:06:41,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:06:41,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58998b1a-1e8b-41ad-bbf9-4e5b30f078fd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:06:41,623 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58998b1a-1e8b-41ad-bbf9-4e5b30f078fd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:06:41,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58998b1a-1e8b-41ad-bbf9-4e5b30f078fd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 19:06:41,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:06:41,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 92 conjunts are in the unsatisfiable core [2021-11-25 19:06:41,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:06:46,083 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:06:46,084 INFO L328 TraceCheckSpWp]: Computing backward predicates...