./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4173bfab-abe7-4cfb-a845-f521ca71c7ee/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4173bfab-abe7-4cfb-a845-f521ca71c7ee/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4173bfab-abe7-4cfb-a845-f521ca71c7ee/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4173bfab-abe7-4cfb-a845-f521ca71c7ee/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4173bfab-abe7-4cfb-a845-f521ca71c7ee/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4173bfab-abe7-4cfb-a845-f521ca71c7ee/bin/utaipan-EQgc7hIp5V --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 81fc918e1fab83089d488e981f8e2fc461bd57864199cdfbd6916c01a7d86fab --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:51:23,598 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:51:23,600 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:51:23,638 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:51:23,639 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:51:23,640 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:51:23,642 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:51:23,645 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:51:23,648 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:51:23,649 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:51:23,651 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:51:23,653 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:51:23,653 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:51:23,655 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:51:23,661 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:51:23,665 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:51:23,666 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:51:23,667 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:51:23,669 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:51:23,672 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:51:23,675 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:51:23,677 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:51:23,679 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:51:23,680 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:51:23,684 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:51:23,685 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:51:23,685 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:51:23,687 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:51:23,688 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:51:23,689 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:51:23,690 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:51:23,691 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:51:23,692 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:51:23,693 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:51:23,695 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:51:23,695 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:51:23,696 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:51:23,697 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:51:23,697 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:51:23,699 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:51:23,699 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:51:23,701 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4173bfab-abe7-4cfb-a845-f521ca71c7ee/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:51:23,735 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:51:23,735 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:51:23,736 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:51:23,736 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:51:23,737 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:51:23,737 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:51:23,737 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:51:23,738 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:51:23,738 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:51:23,738 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:51:23,738 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:51:23,738 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:51:23,739 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:51:23,739 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:51:23,739 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:51:23,739 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:51:23,740 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:51:23,740 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:51:23,741 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:51:23,741 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:51:23,741 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:51:23,741 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:51:23,741 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:51:23,742 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:51:23,742 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:51:23,742 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:51:23,742 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:51:23,742 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:51:23,743 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:51:23,743 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:51:23,743 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:51:23,743 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:51:23,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:51:23,744 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:51:23,744 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:51:23,744 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:51:23,745 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:51:23,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:51:23,745 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:51:23,745 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:51:23,745 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:51:23,746 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_4173bfab-abe7-4cfb-a845-f521ca71c7ee/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4173bfab-abe7-4cfb-a845-f521ca71c7ee/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81fc918e1fab83089d488e981f8e2fc461bd57864199cdfbd6916c01a7d86fab [2021-11-23 02:51:24,064 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:51:24,086 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:51:24,089 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:51:24,091 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:51:24,092 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:51:24,094 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4173bfab-abe7-4cfb-a845-f521ca71c7ee/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2021-11-23 02:51:24,163 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4173bfab-abe7-4cfb-a845-f521ca71c7ee/bin/utaipan-EQgc7hIp5V/data/550742da5/1b912b59d5fb4eddb1141837359e5d35/FLAG5dab0659d [2021-11-23 02:51:24,744 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:51:24,747 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4173bfab-abe7-4cfb-a845-f521ca71c7ee/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2021-11-23 02:51:24,770 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4173bfab-abe7-4cfb-a845-f521ca71c7ee/bin/utaipan-EQgc7hIp5V/data/550742da5/1b912b59d5fb4eddb1141837359e5d35/FLAG5dab0659d [2021-11-23 02:51:25,039 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4173bfab-abe7-4cfb-a845-f521ca71c7ee/bin/utaipan-EQgc7hIp5V/data/550742da5/1b912b59d5fb4eddb1141837359e5d35 [2021-11-23 02:51:25,052 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:51:25,054 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:51:25,056 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:51:25,058 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:51:25,063 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:51:25,064 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:51:25" (1/1) ... [2021-11-23 02:51:25,065 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60931143 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:25, skipping insertion in model container [2021-11-23 02:51:25,065 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:51:25" (1/1) ... [2021-11-23 02:51:25,074 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:51:25,124 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:51:25,411 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_4173bfab-abe7-4cfb-a845-f521ca71c7ee/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7067,7080] [2021-11-23 02:51:25,453 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:51:25,469 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:51:25,524 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_4173bfab-abe7-4cfb-a845-f521ca71c7ee/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7067,7080] [2021-11-23 02:51:25,553 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:51:25,575 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:51:25,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:25 WrapperNode [2021-11-23 02:51:25,576 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:51:25,578 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:51:25,578 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:51:25,578 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:51:25,591 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:25" (1/1) ... [2021-11-23 02:51:25,619 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:25" (1/1) ... [2021-11-23 02:51:25,682 INFO L137 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 570 [2021-11-23 02:51:25,683 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:51:25,684 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:51:25,684 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:51:25,685 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:51:25,692 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:25" (1/1) ... [2021-11-23 02:51:25,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:25" (1/1) ... [2021-11-23 02:51:25,697 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:25" (1/1) ... [2021-11-23 02:51:25,698 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:25" (1/1) ... [2021-11-23 02:51:25,711 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:25" (1/1) ... [2021-11-23 02:51:25,718 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:25" (1/1) ... [2021-11-23 02:51:25,722 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:25" (1/1) ... [2021-11-23 02:51:25,729 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:51:25,730 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:51:25,730 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:51:25,730 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:51:25,732 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:25" (1/1) ... [2021-11-23 02:51:25,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:51:25,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4173bfab-abe7-4cfb-a845-f521ca71c7ee/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:51:25,784 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4173bfab-abe7-4cfb-a845-f521ca71c7ee/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:51:25,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4173bfab-abe7-4cfb-a845-f521ca71c7ee/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:51:25,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:51:25,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:51:25,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:51:25,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:51:25,962 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:51:25,970 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:51:26,690 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:51:27,015 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:51:27,015 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 02:51:27,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:51:27 BoogieIcfgContainer [2021-11-23 02:51:27,020 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:51:27,025 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:51:27,025 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:51:27,029 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:51:27,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:51:25" (1/3) ... [2021-11-23 02:51:27,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32447ca9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:51:27, skipping insertion in model container [2021-11-23 02:51:27,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:25" (2/3) ... [2021-11-23 02:51:27,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32447ca9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:51:27, skipping insertion in model container [2021-11-23 02:51:27,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:51:27" (3/3) ... [2021-11-23 02:51:27,036 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2021-11-23 02:51:27,043 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:51:27,043 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:51:27,113 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:51:27,120 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 [2021-11-23 02:51:27,121 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:51:27,140 INFO L276 IsEmpty]: Start isEmpty. Operand has 81 states, 79 states have (on average 1.7468354430379747) internal successors, (138), 80 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:27,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-23 02:51:27,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:27,150 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] [2021-11-23 02:51:27,151 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:51:27,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:27,158 INFO L85 PathProgramCache]: Analyzing trace with hash -660757956, now seen corresponding path program 1 times [2021-11-23 02:51:27,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:27,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305893802] [2021-11-23 02:51:27,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:27,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:27,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:27,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:51:27,593 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:51:27,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305893802] [2021-11-23 02:51:27,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305893802] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:51:27,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:51:27,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:51:27,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296048756] [2021-11-23 02:51:27,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:27,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:51:27,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:51:27,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:51:27,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:51:27,661 INFO L87 Difference]: Start difference. First operand has 81 states, 79 states have (on average 1.7468354430379747) internal successors, (138), 80 states have internal predecessors, (138), 0 states have call successors, (0), 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 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:27,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:27,795 INFO L93 Difference]: Finished difference Result 185 states and 305 transitions. [2021-11-23 02:51:27,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:51:27,798 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-23 02:51:27,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:27,817 INFO L225 Difference]: With dead ends: 185 [2021-11-23 02:51:27,818 INFO L226 Difference]: Without dead ends: 123 [2021-11-23 02:51:27,822 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 [2021-11-23 02:51:27,831 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 92 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:27,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 298 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:51:27,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-23 02:51:27,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2021-11-23 02:51:27,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.5166666666666666) internal successors, (182), 120 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:27,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 182 transitions. [2021-11-23 02:51:27,925 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 182 transitions. Word has length 32 [2021-11-23 02:51:27,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:27,927 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 182 transitions. [2021-11-23 02:51:27,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:27,929 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 182 transitions. [2021-11-23 02:51:27,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-23 02:51:27,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:27,933 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] [2021-11-23 02:51:27,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:51:27,935 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:51:27,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:27,939 INFO L85 PathProgramCache]: Analyzing trace with hash -252292527, now seen corresponding path program 1 times [2021-11-23 02:51:27,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:27,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749177573] [2021-11-23 02:51:27,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:27,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:27,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:28,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:51:28,039 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:51:28,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749177573] [2021-11-23 02:51:28,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749177573] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:51:28,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:51:28,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:51:28,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122444203] [2021-11-23 02:51:28,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:28,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:51:28,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:51:28,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:51:28,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:51:28,044 INFO L87 Difference]: Start difference. First operand 121 states and 182 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:28,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:28,157 INFO L93 Difference]: Finished difference Result 276 states and 431 transitions. [2021-11-23 02:51:28,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:51:28,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-23 02:51:28,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:28,161 INFO L225 Difference]: With dead ends: 276 [2021-11-23 02:51:28,161 INFO L226 Difference]: Without dead ends: 178 [2021-11-23 02:51:28,162 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 [2021-11-23 02:51:28,164 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 81 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:28,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 188 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:51:28,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-23 02:51:28,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 176. [2021-11-23 02:51:28,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.5257142857142858) internal successors, (267), 175 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:28,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 267 transitions. [2021-11-23 02:51:28,202 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 267 transitions. Word has length 34 [2021-11-23 02:51:28,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:28,203 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 267 transitions. [2021-11-23 02:51:28,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:28,203 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 267 transitions. [2021-11-23 02:51:28,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-23 02:51:28,205 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:28,205 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] [2021-11-23 02:51:28,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:51:28,206 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:51:28,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:28,207 INFO L85 PathProgramCache]: Analyzing trace with hash -206472962, now seen corresponding path program 1 times [2021-11-23 02:51:28,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:28,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784283121] [2021-11-23 02:51:28,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:28,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:28,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:28,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:51:28,316 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:51:28,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784283121] [2021-11-23 02:51:28,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784283121] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:51:28,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:51:28,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:51:28,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198026958] [2021-11-23 02:51:28,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:28,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:51:28,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:51:28,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:51:28,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:51:28,322 INFO L87 Difference]: Start difference. First operand 176 states and 267 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:28,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:28,404 INFO L93 Difference]: Finished difference Result 442 states and 694 transitions. [2021-11-23 02:51:28,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:51:28,405 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-23 02:51:28,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:28,408 INFO L225 Difference]: With dead ends: 442 [2021-11-23 02:51:28,408 INFO L226 Difference]: Without dead ends: 291 [2021-11-23 02:51:28,410 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 [2021-11-23 02:51:28,412 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 82 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:28,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 232 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:51:28,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-11-23 02:51:28,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 289. [2021-11-23 02:51:28,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.5555555555555556) internal successors, (448), 288 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:28,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 448 transitions. [2021-11-23 02:51:28,442 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 448 transitions. Word has length 36 [2021-11-23 02:51:28,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:28,443 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 448 transitions. [2021-11-23 02:51:28,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:28,443 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 448 transitions. [2021-11-23 02:51:28,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-23 02:51:28,445 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:28,445 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] [2021-11-23 02:51:28,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:51:28,446 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:51:28,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:28,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1818136084, now seen corresponding path program 1 times [2021-11-23 02:51:28,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:28,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104978946] [2021-11-23 02:51:28,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:28,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:28,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:28,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:51:28,513 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:51:28,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104978946] [2021-11-23 02:51:28,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104978946] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:51:28,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:51:28,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:51:28,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499387319] [2021-11-23 02:51:28,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:28,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:51:28,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:51:28,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:51:28,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:51:28,517 INFO L87 Difference]: Start difference. First operand 289 states and 448 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:28,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:28,577 INFO L93 Difference]: Finished difference Result 717 states and 1132 transitions. [2021-11-23 02:51:28,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:51:28,578 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-23 02:51:28,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:28,582 INFO L225 Difference]: With dead ends: 717 [2021-11-23 02:51:28,582 INFO L226 Difference]: Without dead ends: 453 [2021-11-23 02:51:28,584 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 [2021-11-23 02:51:28,585 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 81 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:28,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 204 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:51:28,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-11-23 02:51:28,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 451. [2021-11-23 02:51:28,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 1.5666666666666667) internal successors, (705), 450 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:28,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 705 transitions. [2021-11-23 02:51:28,621 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 705 transitions. Word has length 38 [2021-11-23 02:51:28,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:28,621 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 705 transitions. [2021-11-23 02:51:28,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:28,622 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 705 transitions. [2021-11-23 02:51:28,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-23 02:51:28,623 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:28,624 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] [2021-11-23 02:51:28,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:51:28,624 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:51:28,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:28,625 INFO L85 PathProgramCache]: Analyzing trace with hash -241633377, now seen corresponding path program 1 times [2021-11-23 02:51:28,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:28,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941879947] [2021-11-23 02:51:28,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:28,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:28,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:28,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:51:28,715 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:51:28,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941879947] [2021-11-23 02:51:28,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941879947] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:51:28,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:51:28,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:51:28,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757459526] [2021-11-23 02:51:28,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:28,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:51:28,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:51:28,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:51:28,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:51:28,730 INFO L87 Difference]: Start difference. First operand 451 states and 705 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:28,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:28,836 INFO L93 Difference]: Finished difference Result 1169 states and 1856 transitions. [2021-11-23 02:51:28,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:51:28,837 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-23 02:51:28,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:28,844 INFO L225 Difference]: With dead ends: 1169 [2021-11-23 02:51:28,844 INFO L226 Difference]: Without dead ends: 756 [2021-11-23 02:51:28,845 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 [2021-11-23 02:51:28,847 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 77 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:28,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 213 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:51:28,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-11-23 02:51:28,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 754. [2021-11-23 02:51:28,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 1.5737051792828685) internal successors, (1185), 753 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:28,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1185 transitions. [2021-11-23 02:51:28,917 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1185 transitions. Word has length 40 [2021-11-23 02:51:28,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:28,919 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 1185 transitions. [2021-11-23 02:51:28,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:28,920 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1185 transitions. [2021-11-23 02:51:28,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-23 02:51:28,931 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:28,931 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] [2021-11-23 02:51:28,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:51:28,932 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:51:28,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:28,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1750351621, now seen corresponding path program 1 times [2021-11-23 02:51:28,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:28,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297929339] [2021-11-23 02:51:28,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:28,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:28,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:28,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:51:28,990 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:51:28,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297929339] [2021-11-23 02:51:28,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297929339] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:51:28,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:51:28,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:51:28,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681499526] [2021-11-23 02:51:28,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:28,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:51:28,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:51:28,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:51:28,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:51:28,993 INFO L87 Difference]: Start difference. First operand 754 states and 1185 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:29,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:29,094 INFO L93 Difference]: Finished difference Result 1896 states and 3006 transitions. [2021-11-23 02:51:29,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:51:29,094 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-23 02:51:29,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:29,104 INFO L225 Difference]: With dead ends: 1896 [2021-11-23 02:51:29,104 INFO L226 Difference]: Without dead ends: 1180 [2021-11-23 02:51:29,106 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 [2021-11-23 02:51:29,107 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 76 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:29,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 206 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:51:29,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2021-11-23 02:51:29,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 1178. [2021-11-23 02:51:29,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1178 states, 1177 states have (on average 1.5760407816482582) internal successors, (1855), 1177 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:29,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 1855 transitions. [2021-11-23 02:51:29,201 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 1855 transitions. Word has length 42 [2021-11-23 02:51:29,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:29,201 INFO L470 AbstractCegarLoop]: Abstraction has 1178 states and 1855 transitions. [2021-11-23 02:51:29,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:29,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 1855 transitions. [2021-11-23 02:51:29,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-23 02:51:29,203 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:29,203 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] [2021-11-23 02:51:29,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:51:29,203 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:51:29,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:29,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1848700648, now seen corresponding path program 1 times [2021-11-23 02:51:29,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:29,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504848785] [2021-11-23 02:51:29,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:29,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:29,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:29,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:51:29,279 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:51:29,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504848785] [2021-11-23 02:51:29,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504848785] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:51:29,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:51:29,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:51:29,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585128056] [2021-11-23 02:51:29,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:29,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:51:29,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:51:29,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:51:29,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:51:29,282 INFO L87 Difference]: Start difference. First operand 1178 states and 1855 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 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) [2021-11-23 02:51:29,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:29,642 INFO L93 Difference]: Finished difference Result 3006 states and 4744 transitions. [2021-11-23 02:51:29,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:51:29,643 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 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 [2021-11-23 02:51:29,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:29,657 INFO L225 Difference]: With dead ends: 3006 [2021-11-23 02:51:29,657 INFO L226 Difference]: Without dead ends: 1879 [2021-11-23 02:51:29,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:51:29,665 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 460 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:29,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 792 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:51:29,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1879 states. [2021-11-23 02:51:29,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1879 to 1869. [2021-11-23 02:51:29,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 1.5637044967880085) internal successors, (2921), 1868 states have internal predecessors, (2921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:29,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 2921 transitions. [2021-11-23 02:51:29,837 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 2921 transitions. Word has length 44 [2021-11-23 02:51:29,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:29,837 INFO L470 AbstractCegarLoop]: Abstraction has 1869 states and 2921 transitions. [2021-11-23 02:51:29,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 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) [2021-11-23 02:51:29,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 2921 transitions. [2021-11-23 02:51:29,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-23 02:51:29,839 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:29,839 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:51:29,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 02:51:29,839 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:51:29,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:29,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1412641022, now seen corresponding path program 1 times [2021-11-23 02:51:29,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:29,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692579587] [2021-11-23 02:51:29,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:29,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:29,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:29,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:51:29,933 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:51:29,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692579587] [2021-11-23 02:51:29,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692579587] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:51:29,934 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:51:29,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:51:29,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050428412] [2021-11-23 02:51:29,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:29,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:51:29,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:51:29,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:51:29,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:51:29,936 INFO L87 Difference]: Start difference. First operand 1869 states and 2921 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 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) [2021-11-23 02:51:30,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:30,150 INFO L93 Difference]: Finished difference Result 3689 states and 5780 transitions. [2021-11-23 02:51:30,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:51:30,151 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 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 [2021-11-23 02:51:30,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:30,167 INFO L225 Difference]: With dead ends: 3689 [2021-11-23 02:51:30,168 INFO L226 Difference]: Without dead ends: 1871 [2021-11-23 02:51:30,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:51:30,174 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 153 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:30,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 284 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:51:30,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2021-11-23 02:51:30,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 1869. [2021-11-23 02:51:30,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 1.5572805139186296) internal successors, (2909), 1868 states have internal predecessors, (2909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:30,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 2909 transitions. [2021-11-23 02:51:30,346 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 2909 transitions. Word has length 45 [2021-11-23 02:51:30,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:30,347 INFO L470 AbstractCegarLoop]: Abstraction has 1869 states and 2909 transitions. [2021-11-23 02:51:30,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 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) [2021-11-23 02:51:30,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 2909 transitions. [2021-11-23 02:51:30,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-23 02:51:30,348 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:30,348 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] [2021-11-23 02:51:30,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:51:30,349 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:51:30,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:30,349 INFO L85 PathProgramCache]: Analyzing trace with hash 784252527, now seen corresponding path program 1 times [2021-11-23 02:51:30,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:30,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026306793] [2021-11-23 02:51:30,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:30,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:30,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:30,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:51:30,401 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:51:30,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026306793] [2021-11-23 02:51:30,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026306793] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:51:30,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:51:30,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:51:30,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475505764] [2021-11-23 02:51:30,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:30,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:51:30,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:51:30,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:51:30,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:51:30,406 INFO L87 Difference]: Start difference. First operand 1869 states and 2909 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:30,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:30,635 INFO L93 Difference]: Finished difference Result 3689 states and 5756 transitions. [2021-11-23 02:51:30,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:51:30,636 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-23 02:51:30,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:30,648 INFO L225 Difference]: With dead ends: 3689 [2021-11-23 02:51:30,649 INFO L226 Difference]: Without dead ends: 1871 [2021-11-23 02:51:30,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:51:30,658 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 161 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:30,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 290 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:51:30,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2021-11-23 02:51:30,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 1869. [2021-11-23 02:51:30,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 1.5508565310492506) internal successors, (2897), 1868 states have internal predecessors, (2897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:30,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 2897 transitions. [2021-11-23 02:51:30,805 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 2897 transitions. Word has length 46 [2021-11-23 02:51:30,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:30,805 INFO L470 AbstractCegarLoop]: Abstraction has 1869 states and 2897 transitions. [2021-11-23 02:51:30,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:30,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 2897 transitions. [2021-11-23 02:51:30,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-23 02:51:30,807 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:30,808 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] [2021-11-23 02:51:30,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 02:51:30,808 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:51:30,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:30,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1511363611, now seen corresponding path program 1 times [2021-11-23 02:51:30,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:30,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828223818] [2021-11-23 02:51:30,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:30,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:30,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:30,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:51:30,891 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:51:30,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828223818] [2021-11-23 02:51:30,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828223818] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:51:30,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:51:30,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:51:30,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734081898] [2021-11-23 02:51:30,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:30,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:51:30,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:51:30,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:51:30,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:51:30,899 INFO L87 Difference]: Start difference. First operand 1869 states and 2897 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 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) [2021-11-23 02:51:31,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:31,144 INFO L93 Difference]: Finished difference Result 3689 states and 5732 transitions. [2021-11-23 02:51:31,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:51:31,145 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 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 [2021-11-23 02:51:31,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:31,157 INFO L225 Difference]: With dead ends: 3689 [2021-11-23 02:51:31,158 INFO L226 Difference]: Without dead ends: 1871 [2021-11-23 02:51:31,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:51:31,162 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 159 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:31,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 293 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:51:31,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2021-11-23 02:51:31,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 1869. [2021-11-23 02:51:31,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 1.5444325481798715) internal successors, (2885), 1868 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:31,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 2885 transitions. [2021-11-23 02:51:31,294 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 2885 transitions. Word has length 47 [2021-11-23 02:51:31,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:31,294 INFO L470 AbstractCegarLoop]: Abstraction has 1869 states and 2885 transitions. [2021-11-23 02:51:31,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 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) [2021-11-23 02:51:31,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 2885 transitions. [2021-11-23 02:51:31,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-23 02:51:31,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:31,295 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] [2021-11-23 02:51:31,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 02:51:31,296 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:51:31,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:31,296 INFO L85 PathProgramCache]: Analyzing trace with hash 2056170934, now seen corresponding path program 1 times [2021-11-23 02:51:31,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:31,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912116456] [2021-11-23 02:51:31,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:31,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:31,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:31,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:51:31,424 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:51:31,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912116456] [2021-11-23 02:51:31,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912116456] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:51:31,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:51:31,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:51:31,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408336061] [2021-11-23 02:51:31,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:31,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:51:31,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:51:31,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:51:31,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:51:31,427 INFO L87 Difference]: Start difference. First operand 1869 states and 2885 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 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) [2021-11-23 02:51:31,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:31,702 INFO L93 Difference]: Finished difference Result 3689 states and 5708 transitions. [2021-11-23 02:51:31,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:51:31,705 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 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 [2021-11-23 02:51:31,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:31,718 INFO L225 Difference]: With dead ends: 3689 [2021-11-23 02:51:31,718 INFO L226 Difference]: Without dead ends: 1871 [2021-11-23 02:51:31,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:51:31,722 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 123 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:31,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 365 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:51:31,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2021-11-23 02:51:31,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 1869. [2021-11-23 02:51:31,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 1.5401498929336188) internal successors, (2877), 1868 states have internal predecessors, (2877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:31,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 2877 transitions. [2021-11-23 02:51:31,862 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 2877 transitions. Word has length 49 [2021-11-23 02:51:31,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:31,862 INFO L470 AbstractCegarLoop]: Abstraction has 1869 states and 2877 transitions. [2021-11-23 02:51:31,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 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) [2021-11-23 02:51:31,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 2877 transitions. [2021-11-23 02:51:31,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-23 02:51:31,864 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:31,864 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] [2021-11-23 02:51:31,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 02:51:31,864 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:51:31,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:31,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1483858783, now seen corresponding path program 1 times [2021-11-23 02:51:31,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:31,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864501373] [2021-11-23 02:51:31,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:31,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:31,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:31,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:51:31,989 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:51:31,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864501373] [2021-11-23 02:51:31,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864501373] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:51:31,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:51:31,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:51:31,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375723422] [2021-11-23 02:51:31,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:31,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:51:31,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:51:31,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:51:31,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:51:31,991 INFO L87 Difference]: Start difference. First operand 1869 states and 2877 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:32,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:32,301 INFO L93 Difference]: Finished difference Result 4710 states and 7235 transitions. [2021-11-23 02:51:32,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:51:32,301 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-23 02:51:32,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:32,322 INFO L225 Difference]: With dead ends: 4710 [2021-11-23 02:51:32,322 INFO L226 Difference]: Without dead ends: 2892 [2021-11-23 02:51:32,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:51:32,328 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 183 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:32,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 298 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:51:32,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2892 states. [2021-11-23 02:51:32,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2892 to 2890. [2021-11-23 02:51:32,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2890 states, 2889 states have (on average 1.5257874697127034) internal successors, (4408), 2889 states have internal predecessors, (4408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:32,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2890 states to 2890 states and 4408 transitions. [2021-11-23 02:51:32,585 INFO L78 Accepts]: Start accepts. Automaton has 2890 states and 4408 transitions. Word has length 52 [2021-11-23 02:51:32,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:32,585 INFO L470 AbstractCegarLoop]: Abstraction has 2890 states and 4408 transitions. [2021-11-23 02:51:32,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:32,586 INFO L276 IsEmpty]: Start isEmpty. Operand 2890 states and 4408 transitions. [2021-11-23 02:51:32,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-23 02:51:32,586 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:32,586 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:51:32,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 02:51:32,587 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:51:32,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:32,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1254488821, now seen corresponding path program 1 times [2021-11-23 02:51:32,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:32,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162354483] [2021-11-23 02:51:32,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:32,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:32,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:32,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:51:32,733 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:51:32,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162354483] [2021-11-23 02:51:32,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162354483] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:51:32,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:51:32,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:51:32,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183079199] [2021-11-23 02:51:32,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:32,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:51:32,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:51:32,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:51:32,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:51:32,736 INFO L87 Difference]: Start difference. First operand 2890 states and 4408 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:33,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:33,224 INFO L93 Difference]: Finished difference Result 3549 states and 5384 transitions. [2021-11-23 02:51:33,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:51:33,225 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-23 02:51:33,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:33,250 INFO L225 Difference]: With dead ends: 3549 [2021-11-23 02:51:33,250 INFO L226 Difference]: Without dead ends: 3547 [2021-11-23 02:51:33,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:51:33,253 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 216 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:33,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 753 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:51:33,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3547 states. [2021-11-23 02:51:33,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3547 to 2896. [2021-11-23 02:51:33,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2896 states, 2895 states have (on average 1.5226252158894646) internal successors, (4408), 2895 states have internal predecessors, (4408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:33,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2896 states to 2896 states and 4408 transitions. [2021-11-23 02:51:33,554 INFO L78 Accepts]: Start accepts. Automaton has 2896 states and 4408 transitions. Word has length 53 [2021-11-23 02:51:33,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:33,554 INFO L470 AbstractCegarLoop]: Abstraction has 2896 states and 4408 transitions. [2021-11-23 02:51:33,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:33,555 INFO L276 IsEmpty]: Start isEmpty. Operand 2896 states and 4408 transitions. [2021-11-23 02:51:33,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-23 02:51:33,556 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:33,556 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 02:51:33,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 02:51:33,556 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:51:33,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:33,557 INFO L85 PathProgramCache]: Analyzing trace with hash -705426536, now seen corresponding path program 1 times [2021-11-23 02:51:33,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:33,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434878068] [2021-11-23 02:51:33,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:33,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:33,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:34,930 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:51:34,930 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:51:34,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434878068] [2021-11-23 02:51:34,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434878068] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:51:34,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805399070] [2021-11-23 02:51:34,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:34,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:51:34,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4173bfab-abe7-4cfb-a845-f521ca71c7ee/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:51:34,934 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4173bfab-abe7-4cfb-a845-f521ca71c7ee/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:51:34,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4173bfab-abe7-4cfb-a845-f521ca71c7ee/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:51:35,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:35,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 02:51:35,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:51:36,228 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:51:36,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:51:40,536 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:51:40,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805399070] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:51:40,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1475647881] [2021-11-23 02:51:40,564 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2021-11-23 02:51:40,564 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:51:40,569 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:51:40,575 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:51:40,575 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:51:41,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:51:41,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:51:41,023 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 [2021-11-23 02:51:41,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:51:41,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:51:41,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:51:41,103 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 [2021-11-23 02:51:41,188 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-23 02:51:51,894 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-23 03:04:25,277 WARN L227 SmtUtils]: Spent 6.15s on a formula simplification that was a NOOP. DAG size: 513 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)