./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810d7df9-eeb1-470a-a90a-dcb16ffb1344/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810d7df9-eeb1-470a-a90a-dcb16ffb1344/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810d7df9-eeb1-470a-a90a-dcb16ffb1344/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810d7df9-eeb1-470a-a90a-dcb16ffb1344/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810d7df9-eeb1-470a-a90a-dcb16ffb1344/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810d7df9-eeb1-470a-a90a-dcb16ffb1344/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1d2ed0f37ff2caecb0f852b41838696d35f940cfb2007be63d1246f35f6e95b8 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:56:31,455 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:56:31,458 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:56:31,541 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:56:31,542 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:56:31,548 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:56:31,551 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:56:31,556 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:56:31,560 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:56:31,567 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:56:31,569 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:56:31,571 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:56:31,572 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:56:31,576 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:56:31,579 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:56:31,590 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:56:31,610 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:56:31,612 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:56:31,615 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:56:31,626 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:56:31,628 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:56:31,630 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:56:31,634 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:56:31,636 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:56:31,647 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:56:31,648 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:56:31,649 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:56:31,651 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:56:31,653 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:56:31,655 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:56:31,655 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:56:31,657 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:56:31,677 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:56:31,679 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:56:31,681 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:56:31,682 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:56:31,683 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:56:31,683 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:56:31,684 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:56:31,685 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:56:31,686 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:56:31,688 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810d7df9-eeb1-470a-a90a-dcb16ffb1344/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:56:31,743 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:56:31,744 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:56:31,745 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:56:31,745 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:56:31,747 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:56:31,747 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:56:31,747 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:56:31,748 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:56:31,748 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:56:31,749 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:56:31,750 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:56:31,751 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:56:31,751 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:56:31,751 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:56:31,752 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:56:31,752 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:56:31,753 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:56:31,753 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:56:31,755 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:56:31,755 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:56:31,756 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:56:31,756 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:56:31,756 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:56:31,757 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:56:31,757 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:56:31,758 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:56:31,760 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:56:31,760 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:56:31,760 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:56:31,761 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:56:31,761 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:56:31,762 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:56:31,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:56:31,763 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:56:31,763 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:56:31,763 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:56:31,764 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:56:31,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:56:31,765 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:56:31,765 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:56:31,765 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:56:31,766 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_810d7df9-eeb1-470a-a90a-dcb16ffb1344/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810d7df9-eeb1-470a-a90a-dcb16ffb1344/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d2ed0f37ff2caecb0f852b41838696d35f940cfb2007be63d1246f35f6e95b8 [2021-11-25 19:56:32,166 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:56:32,207 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:56:32,211 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:56:32,213 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:56:32,214 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:56:32,215 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810d7df9-eeb1-470a-a90a-dcb16ffb1344/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2021-11-25 19:56:32,315 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810d7df9-eeb1-470a-a90a-dcb16ffb1344/bin/utaipan-eEHZpOm5b7/data/c8556777f/db866aeb3d6e4655bdafeeba6929a9ab/FLAG535b2d83e [2021-11-25 19:56:33,148 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:56:33,148 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810d7df9-eeb1-470a-a90a-dcb16ffb1344/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2021-11-25 19:56:33,182 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810d7df9-eeb1-470a-a90a-dcb16ffb1344/bin/utaipan-eEHZpOm5b7/data/c8556777f/db866aeb3d6e4655bdafeeba6929a9ab/FLAG535b2d83e [2021-11-25 19:56:33,375 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810d7df9-eeb1-470a-a90a-dcb16ffb1344/bin/utaipan-eEHZpOm5b7/data/c8556777f/db866aeb3d6e4655bdafeeba6929a9ab [2021-11-25 19:56:33,380 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:56:33,384 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:56:33,390 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:56:33,390 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:56:33,395 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:56:33,396 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:56:33" (1/1) ... [2021-11-25 19:56:33,400 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72ec495c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:56:33, skipping insertion in model container [2021-11-25 19:56:33,400 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:56:33" (1/1) ... [2021-11-25 19:56:33,410 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:56:33,515 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:56:33,998 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_810d7df9-eeb1-470a-a90a-dcb16ffb1344/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c[14220,14233] [2021-11-25 19:56:34,135 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:56:34,158 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:56:34,335 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_810d7df9-eeb1-470a-a90a-dcb16ffb1344/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c[14220,14233] [2021-11-25 19:56:34,439 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:56:34,462 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:56:34,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:56:34 WrapperNode [2021-11-25 19:56:34,463 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:56:34,465 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:56:34,465 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:56:34,479 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:56:34,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:56:34" (1/1) ... [2021-11-25 19:56:34,518 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:56:34" (1/1) ... [2021-11-25 19:56:34,590 INFO L137 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1196 [2021-11-25 19:56:34,590 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:56:34,591 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:56:34,592 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:56:34,592 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:56:34,603 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:56:34" (1/1) ... [2021-11-25 19:56:34,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:56:34" (1/1) ... [2021-11-25 19:56:34,611 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:56:34" (1/1) ... [2021-11-25 19:56:34,612 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:56:34" (1/1) ... [2021-11-25 19:56:34,633 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:56:34" (1/1) ... [2021-11-25 19:56:34,647 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:56:34" (1/1) ... [2021-11-25 19:56:34,651 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:56:34" (1/1) ... [2021-11-25 19:56:34,659 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:56:34,660 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:56:34,660 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:56:34,660 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:56:34,661 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:56:34" (1/1) ... [2021-11-25 19:56:34,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:56:34,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810d7df9-eeb1-470a-a90a-dcb16ffb1344/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:56:34,717 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810d7df9-eeb1-470a-a90a-dcb16ffb1344/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:56:34,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810d7df9-eeb1-470a-a90a-dcb16ffb1344/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:56:34,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:56:34,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:56:34,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:56:34,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:56:35,012 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:56:35,015 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:56:36,328 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:56:37,002 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:56:37,002 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 19:56:37,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:56:37 BoogieIcfgContainer [2021-11-25 19:56:37,007 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:56:37,009 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:56:37,010 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:56:37,021 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:56:37,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:56:33" (1/3) ... [2021-11-25 19:56:37,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eae50a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:56:37, skipping insertion in model container [2021-11-25 19:56:37,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:56:34" (2/3) ... [2021-11-25 19:56:37,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eae50a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:56:37, skipping insertion in model container [2021-11-25 19:56:37,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:56:37" (3/3) ... [2021-11-25 19:56:37,025 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2021-11-25 19:56:37,037 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:56:37,037 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:56:37,116 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:56:37,128 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 19:56:37,129 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:56:37,160 INFO L276 IsEmpty]: Start isEmpty. Operand has 192 states, 190 states have (on average 1.5368421052631578) internal successors, (292), 191 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:37,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-25 19:56:37,191 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:56:37,194 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:56:37,196 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:56:37,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:56:37,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1563561503, now seen corresponding path program 1 times [2021-11-25 19:56:37,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:56:37,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472941787] [2021-11-25 19:56:37,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:37,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:56:37,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:37,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:56:37,724 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:56:37,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472941787] [2021-11-25 19:56:37,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472941787] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:56:37,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:56:37,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:56:37,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330315108] [2021-11-25 19:56:37,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:56:37,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:56:37,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:56:37,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:56:37,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:56:37,773 INFO L87 Difference]: Start difference. First operand has 192 states, 190 states have (on average 1.5368421052631578) internal successors, (292), 191 states have internal predecessors, (292), 0 states have call successors, (0), 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 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:38,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:56:38,224 INFO L93 Difference]: Finished difference Result 513 states and 776 transitions. [2021-11-25 19:56:38,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:56:38,227 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-25 19:56:38,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:56:38,259 INFO L225 Difference]: With dead ends: 513 [2021-11-25 19:56:38,259 INFO L226 Difference]: Without dead ends: 323 [2021-11-25 19:56:38,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:56:38,275 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 230 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:56:38,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 680 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:56:38,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-11-25 19:56:38,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 321. [2021-11-25 19:56:38,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.471875) internal successors, (471), 320 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:38,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 471 transitions. [2021-11-25 19:56:38,405 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 471 transitions. Word has length 74 [2021-11-25 19:56:38,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:56:38,406 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 471 transitions. [2021-11-25 19:56:38,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:38,409 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 471 transitions. [2021-11-25 19:56:38,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-25 19:56:38,423 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:56:38,424 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:56:38,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:56:38,424 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:56:38,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:56:38,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1050419475, now seen corresponding path program 1 times [2021-11-25 19:56:38,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:56:38,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408569452] [2021-11-25 19:56:38,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:38,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:56:38,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:38,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:56:38,760 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:56:38,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408569452] [2021-11-25 19:56:38,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408569452] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:56:38,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:56:38,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:56:38,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233300742] [2021-11-25 19:56:38,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:56:38,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:56:38,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:56:38,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:56:38,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:56:38,765 INFO L87 Difference]: Start difference. First operand 321 states and 471 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:39,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:56:39,360 INFO L93 Difference]: Finished difference Result 747 states and 1096 transitions. [2021-11-25 19:56:39,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:56:39,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-25 19:56:39,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:56:39,367 INFO L225 Difference]: With dead ends: 747 [2021-11-25 19:56:39,367 INFO L226 Difference]: Without dead ends: 501 [2021-11-25 19:56:39,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:56:39,379 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 236 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:56:39,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 433 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 19:56:39,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-11-25 19:56:39,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 499. [2021-11-25 19:56:39,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 1.463855421686747) internal successors, (729), 498 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:39,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 729 transitions. [2021-11-25 19:56:39,441 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 729 transitions. Word has length 83 [2021-11-25 19:56:39,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:56:39,442 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 729 transitions. [2021-11-25 19:56:39,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:39,443 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 729 transitions. [2021-11-25 19:56:39,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-25 19:56:39,448 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:56:39,448 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:56:39,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:56:39,449 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:56:39,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:56:39,450 INFO L85 PathProgramCache]: Analyzing trace with hash 2127850952, now seen corresponding path program 1 times [2021-11-25 19:56:39,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:56:39,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94260122] [2021-11-25 19:56:39,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:39,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:56:39,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:39,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:56:39,949 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:56:39,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94260122] [2021-11-25 19:56:39,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94260122] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:56:39,949 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:56:39,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:56:39,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556695197] [2021-11-25 19:56:39,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:56:39,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:56:39,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:56:39,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:56:39,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:56:39,952 INFO L87 Difference]: Start difference. First operand 499 states and 729 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:40,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:56:40,067 INFO L93 Difference]: Finished difference Result 714 states and 1043 transitions. [2021-11-25 19:56:40,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:56:40,068 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-25 19:56:40,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:56:40,071 INFO L225 Difference]: With dead ends: 714 [2021-11-25 19:56:40,072 INFO L226 Difference]: Without dead ends: 324 [2021-11-25 19:56:40,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:56:40,075 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 131 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:56:40,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 382 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:56:40,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-11-25 19:56:40,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 216. [2021-11-25 19:56:40,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.455813953488372) internal successors, (313), 215 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:40,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 313 transitions. [2021-11-25 19:56:40,119 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 313 transitions. Word has length 83 [2021-11-25 19:56:40,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:56:40,120 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 313 transitions. [2021-11-25 19:56:40,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:40,120 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 313 transitions. [2021-11-25 19:56:40,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-25 19:56:40,129 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:56:40,130 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:56:40,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 19:56:40,130 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:56:40,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:56:40,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1610856231, now seen corresponding path program 1 times [2021-11-25 19:56:40,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:56:40,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124033967] [2021-11-25 19:56:40,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:40,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:56:40,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:40,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:56:40,261 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:56:40,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124033967] [2021-11-25 19:56:40,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124033967] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:56:40,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:56:40,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:56:40,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837798605] [2021-11-25 19:56:40,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:56:40,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:56:40,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:56:40,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:56:40,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:56:40,265 INFO L87 Difference]: Start difference. First operand 216 states and 313 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:40,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:56:40,490 INFO L93 Difference]: Finished difference Result 571 states and 829 transitions. [2021-11-25 19:56:40,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:56:40,491 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-25 19:56:40,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:56:40,494 INFO L225 Difference]: With dead ends: 571 [2021-11-25 19:56:40,495 INFO L226 Difference]: Without dead ends: 369 [2021-11-25 19:56:40,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:56:40,510 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 211 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:56:40,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 601 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:56:40,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-11-25 19:56:40,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 367. [2021-11-25 19:56:40,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 1.4453551912568305) internal successors, (529), 366 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:40,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 529 transitions. [2021-11-25 19:56:40,549 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 529 transitions. Word has length 83 [2021-11-25 19:56:40,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:56:40,549 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 529 transitions. [2021-11-25 19:56:40,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:40,550 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 529 transitions. [2021-11-25 19:56:40,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-25 19:56:40,554 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:56:40,554 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:56:40,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 19:56:40,555 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:56:40,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:56:40,557 INFO L85 PathProgramCache]: Analyzing trace with hash 520325139, now seen corresponding path program 1 times [2021-11-25 19:56:40,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:56:40,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533749478] [2021-11-25 19:56:40,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:40,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:56:40,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:40,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:56:40,820 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:56:40,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533749478] [2021-11-25 19:56:40,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533749478] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:56:40,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:56:40,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:56:40,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241708366] [2021-11-25 19:56:40,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:56:40,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:56:40,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:56:40,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:56:40,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:56:40,824 INFO L87 Difference]: Start difference. First operand 367 states and 529 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:40,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:56:40,932 INFO L93 Difference]: Finished difference Result 497 states and 715 transitions. [2021-11-25 19:56:40,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:56:40,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-25 19:56:40,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:56:40,937 INFO L225 Difference]: With dead ends: 497 [2021-11-25 19:56:40,938 INFO L226 Difference]: Without dead ends: 206 [2021-11-25 19:56:40,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:56:40,943 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 110 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:56:40,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 369 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:56:40,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-25 19:56:40,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 204. [2021-11-25 19:56:40,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.4236453201970443) internal successors, (289), 203 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:40,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 289 transitions. [2021-11-25 19:56:40,970 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 289 transitions. Word has length 92 [2021-11-25 19:56:40,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:56:40,971 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 289 transitions. [2021-11-25 19:56:40,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:40,972 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 289 transitions. [2021-11-25 19:56:40,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-25 19:56:40,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:56:40,981 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:56:40,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 19:56:40,981 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:56:40,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:56:40,982 INFO L85 PathProgramCache]: Analyzing trace with hash 2013693728, now seen corresponding path program 1 times [2021-11-25 19:56:40,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:56:40,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499967880] [2021-11-25 19:56:40,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:40,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:56:41,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:41,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:56:41,193 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:56:41,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499967880] [2021-11-25 19:56:41,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499967880] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:56:41,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:56:41,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:56:41,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539612831] [2021-11-25 19:56:41,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:56:41,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:56:41,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:56:41,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:56:41,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:56:41,197 INFO L87 Difference]: Start difference. First operand 204 states and 289 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:41,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:56:41,361 INFO L93 Difference]: Finished difference Result 543 states and 772 transitions. [2021-11-25 19:56:41,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:56:41,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-25 19:56:41,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:56:41,367 INFO L225 Difference]: With dead ends: 543 [2021-11-25 19:56:41,367 INFO L226 Difference]: Without dead ends: 388 [2021-11-25 19:56:41,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:56:41,371 INFO L933 BasicCegarLoop]: 316 mSDtfsCounter, 200 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:56:41,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 527 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:56:41,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-11-25 19:56:41,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 366. [2021-11-25 19:56:41,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 1.4109589041095891) internal successors, (515), 365 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:41,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 515 transitions. [2021-11-25 19:56:41,405 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 515 transitions. Word has length 92 [2021-11-25 19:56:41,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:56:41,406 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 515 transitions. [2021-11-25 19:56:41,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:41,406 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 515 transitions. [2021-11-25 19:56:41,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-25 19:56:41,408 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:56:41,408 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:56:41,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 19:56:41,409 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:56:41,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:56:41,409 INFO L85 PathProgramCache]: Analyzing trace with hash -125099715, now seen corresponding path program 1 times [2021-11-25 19:56:41,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:56:41,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638629349] [2021-11-25 19:56:41,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:41,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:56:41,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:41,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:56:41,582 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:56:41,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638629349] [2021-11-25 19:56:41,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638629349] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:56:41,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:56:41,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:56:41,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929496515] [2021-11-25 19:56:41,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:56:41,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:56:41,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:56:41,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:56:41,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:56:41,587 INFO L87 Difference]: Start difference. First operand 366 states and 515 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:41,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:56:41,755 INFO L93 Difference]: Finished difference Result 980 states and 1380 transitions. [2021-11-25 19:56:41,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:56:41,756 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-25 19:56:41,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:56:41,765 INFO L225 Difference]: With dead ends: 980 [2021-11-25 19:56:41,765 INFO L226 Difference]: Without dead ends: 700 [2021-11-25 19:56:41,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:56:41,767 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 188 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:56:41,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 428 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:56:41,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2021-11-25 19:56:41,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 658. [2021-11-25 19:56:41,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 1.39117199391172) internal successors, (914), 657 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:41,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 914 transitions. [2021-11-25 19:56:41,847 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 914 transitions. Word has length 98 [2021-11-25 19:56:41,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:56:41,848 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 914 transitions. [2021-11-25 19:56:41,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:41,848 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 914 transitions. [2021-11-25 19:56:41,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-25 19:56:41,852 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:56:41,852 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:56:41,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 19:56:41,852 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:56:41,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:56:41,854 INFO L85 PathProgramCache]: Analyzing trace with hash 877234484, now seen corresponding path program 1 times [2021-11-25 19:56:41,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:56:41,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729482141] [2021-11-25 19:56:41,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:41,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:56:41,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:42,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:56:42,028 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:56:42,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729482141] [2021-11-25 19:56:42,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729482141] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:56:42,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:56:42,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:56:42,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426872820] [2021-11-25 19:56:42,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:56:42,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:56:42,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:56:42,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:56:42,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:56:42,031 INFO L87 Difference]: Start difference. First operand 658 states and 914 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:42,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:56:42,256 INFO L93 Difference]: Finished difference Result 1762 states and 2444 transitions. [2021-11-25 19:56:42,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:56:42,256 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-11-25 19:56:42,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:56:42,267 INFO L225 Difference]: With dead ends: 1762 [2021-11-25 19:56:42,269 INFO L226 Difference]: Without dead ends: 1260 [2021-11-25 19:56:42,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:56:42,272 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 176 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:56:42,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 428 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:56:42,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2021-11-25 19:56:42,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 1178. [2021-11-25 19:56:42,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1178 states, 1177 states have (on average 1.3644859813084111) internal successors, (1606), 1177 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:42,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 1606 transitions. [2021-11-25 19:56:42,394 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 1606 transitions. Word has length 104 [2021-11-25 19:56:42,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:56:42,396 INFO L470 AbstractCegarLoop]: Abstraction has 1178 states and 1606 transitions. [2021-11-25 19:56:42,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:42,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 1606 transitions. [2021-11-25 19:56:42,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-25 19:56:42,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:56:42,401 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:56:42,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 19:56:42,402 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:56:42,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:56:42,403 INFO L85 PathProgramCache]: Analyzing trace with hash -182695072, now seen corresponding path program 1 times [2021-11-25 19:56:42,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:56:42,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854637148] [2021-11-25 19:56:42,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:42,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:56:42,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:42,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:56:42,512 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:56:42,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854637148] [2021-11-25 19:56:42,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854637148] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:56:42,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:56:42,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:56:42,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074268579] [2021-11-25 19:56:42,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:56:42,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:56:42,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:56:42,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:56:42,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:56:42,516 INFO L87 Difference]: Start difference. First operand 1178 states and 1606 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:42,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:56:42,825 INFO L93 Difference]: Finished difference Result 2082 states and 2844 transitions. [2021-11-25 19:56:42,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:56:42,826 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-11-25 19:56:42,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:56:42,835 INFO L225 Difference]: With dead ends: 2082 [2021-11-25 19:56:42,835 INFO L226 Difference]: Without dead ends: 1110 [2021-11-25 19:56:42,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:56:42,841 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 393 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:56:42,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 375 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:56:42,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-11-25 19:56:42,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 1108. [2021-11-25 19:56:42,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 1107 states have (on average 1.3676603432700993) internal successors, (1514), 1107 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:42,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 1514 transitions. [2021-11-25 19:56:42,978 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 1514 transitions. Word has length 110 [2021-11-25 19:56:42,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:56:42,978 INFO L470 AbstractCegarLoop]: Abstraction has 1108 states and 1514 transitions. [2021-11-25 19:56:42,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:42,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 1514 transitions. [2021-11-25 19:56:42,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-25 19:56:42,983 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:56:42,983 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:56:42,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 19:56:42,984 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:56:42,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:56:42,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1677904530, now seen corresponding path program 1 times [2021-11-25 19:56:42,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:56:42,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596984561] [2021-11-25 19:56:42,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:42,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:56:43,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:43,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:56:43,119 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:56:43,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596984561] [2021-11-25 19:56:43,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596984561] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:56:43,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:56:43,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:56:43,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589340327] [2021-11-25 19:56:43,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:56:43,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:56:43,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:56:43,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:56:43,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:56:43,122 INFO L87 Difference]: Start difference. First operand 1108 states and 1514 transitions. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:43,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:56:43,374 INFO L93 Difference]: Finished difference Result 1980 states and 2708 transitions. [2021-11-25 19:56:43,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:56:43,380 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-25 19:56:43,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:56:43,389 INFO L225 Difference]: With dead ends: 1980 [2021-11-25 19:56:43,389 INFO L226 Difference]: Without dead ends: 1062 [2021-11-25 19:56:43,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:56:43,392 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 386 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:56:43,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 367 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:56:43,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2021-11-25 19:56:43,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 1060. [2021-11-25 19:56:43,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1060 states, 1059 states have (on average 1.3692162417374882) internal successors, (1450), 1059 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:43,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 1450 transitions. [2021-11-25 19:56:43,555 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 1450 transitions. Word has length 113 [2021-11-25 19:56:43,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:56:43,555 INFO L470 AbstractCegarLoop]: Abstraction has 1060 states and 1450 transitions. [2021-11-25 19:56:43,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:43,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 1450 transitions. [2021-11-25 19:56:43,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-25 19:56:43,559 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:56:43,560 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:56:43,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 19:56:43,561 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:56:43,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:56:43,561 INFO L85 PathProgramCache]: Analyzing trace with hash 459687977, now seen corresponding path program 1 times [2021-11-25 19:56:43,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:56:43,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035341981] [2021-11-25 19:56:43,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:43,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:56:43,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:43,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:56:43,708 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:56:43,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035341981] [2021-11-25 19:56:43,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035341981] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:56:43,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:56:43,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:56:43,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335574295] [2021-11-25 19:56:43,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:56:43,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:56:43,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:56:43,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:56:43,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:56:43,712 INFO L87 Difference]: Start difference. First operand 1060 states and 1450 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:43,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:56:43,971 INFO L93 Difference]: Finished difference Result 1900 states and 2600 transitions. [2021-11-25 19:56:43,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:56:43,972 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-11-25 19:56:43,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:56:43,981 INFO L225 Difference]: With dead ends: 1900 [2021-11-25 19:56:43,981 INFO L226 Difference]: Without dead ends: 1025 [2021-11-25 19:56:43,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:56:43,985 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 377 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:56:43,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 399 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:56:43,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2021-11-25 19:56:44,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 1023. [2021-11-25 19:56:44,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 1.36986301369863) internal successors, (1400), 1022 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:44,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1400 transitions. [2021-11-25 19:56:44,112 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1400 transitions. Word has length 116 [2021-11-25 19:56:44,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:56:44,113 INFO L470 AbstractCegarLoop]: Abstraction has 1023 states and 1400 transitions. [2021-11-25 19:56:44,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:44,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1400 transitions. [2021-11-25 19:56:44,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-25 19:56:44,118 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:56:44,118 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:56:44,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 19:56:44,118 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:56:44,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:56:44,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1284423256, now seen corresponding path program 1 times [2021-11-25 19:56:44,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:56:44,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122373062] [2021-11-25 19:56:44,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:44,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:56:44,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:44,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:56:44,311 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:56:44,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122373062] [2021-11-25 19:56:44,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122373062] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:56:44,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:56:44,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:56:44,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075336300] [2021-11-25 19:56:44,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:56:44,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:56:44,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:56:44,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:56:44,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:56:44,314 INFO L87 Difference]: Start difference. First operand 1023 states and 1400 transitions. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:44,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:56:44,554 INFO L93 Difference]: Finished difference Result 2009 states and 2750 transitions. [2021-11-25 19:56:44,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:56:44,555 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-25 19:56:44,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:56:44,564 INFO L225 Difference]: With dead ends: 2009 [2021-11-25 19:56:44,564 INFO L226 Difference]: Without dead ends: 1023 [2021-11-25 19:56:44,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:56:44,567 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 74 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:56:44,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 363 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:56:44,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2021-11-25 19:56:44,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 1023. [2021-11-25 19:56:44,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 1.3688845401174168) internal successors, (1399), 1022 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:44,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1399 transitions. [2021-11-25 19:56:44,701 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1399 transitions. Word has length 119 [2021-11-25 19:56:44,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:56:44,703 INFO L470 AbstractCegarLoop]: Abstraction has 1023 states and 1399 transitions. [2021-11-25 19:56:44,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:44,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1399 transitions. [2021-11-25 19:56:44,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-25 19:56:44,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:56:44,709 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:56:44,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 19:56:44,710 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:56:44,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:56:44,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1865370117, now seen corresponding path program 1 times [2021-11-25 19:56:44,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:56:44,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018184730] [2021-11-25 19:56:44,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:44,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:56:44,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:44,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:56:44,995 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:56:44,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018184730] [2021-11-25 19:56:44,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018184730] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:56:44,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:56:44,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:56:44,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462312703] [2021-11-25 19:56:44,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:56:44,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:56:44,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:56:44,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:56:44,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:56:44,998 INFO L87 Difference]: Start difference. First operand 1023 states and 1399 transitions. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:45,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:56:45,284 INFO L93 Difference]: Finished difference Result 2009 states and 2749 transitions. [2021-11-25 19:56:45,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:56:45,285 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-11-25 19:56:45,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:56:45,293 INFO L225 Difference]: With dead ends: 2009 [2021-11-25 19:56:45,294 INFO L226 Difference]: Without dead ends: 1023 [2021-11-25 19:56:45,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:56:45,297 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 49 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:56:45,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 517 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:56:45,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2021-11-25 19:56:45,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 1023. [2021-11-25 19:56:45,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 1.3679060665362035) internal successors, (1398), 1022 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:45,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1398 transitions. [2021-11-25 19:56:45,416 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1398 transitions. Word has length 121 [2021-11-25 19:56:45,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:56:45,417 INFO L470 AbstractCegarLoop]: Abstraction has 1023 states and 1398 transitions. [2021-11-25 19:56:45,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:45,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1398 transitions. [2021-11-25 19:56:45,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-25 19:56:45,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:56:45,422 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:56:45,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 19:56:45,423 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:56:45,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:56:45,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1812788989, now seen corresponding path program 1 times [2021-11-25 19:56:45,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:56:45,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835325412] [2021-11-25 19:56:45,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:45,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:56:45,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:45,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:56:45,510 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:56:45,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835325412] [2021-11-25 19:56:45,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835325412] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:56:45,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:56:45,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:56:45,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858945517] [2021-11-25 19:56:45,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:56:45,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:56:45,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:56:45,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:56:45,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:56:45,513 INFO L87 Difference]: Start difference. First operand 1023 states and 1398 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:46,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:56:46,078 INFO L93 Difference]: Finished difference Result 2858 states and 3897 transitions. [2021-11-25 19:56:46,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:56:46,080 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-11-25 19:56:46,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:56:46,095 INFO L225 Difference]: With dead ends: 2858 [2021-11-25 19:56:46,095 INFO L226 Difference]: Without dead ends: 2004 [2021-11-25 19:56:46,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:56:46,099 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 181 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:56:46,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 236 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:56:46,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2004 states. [2021-11-25 19:56:46,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2004 to 2002. [2021-11-25 19:56:46,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2002 states, 2001 states have (on average 1.353823088455772) internal successors, (2709), 2001 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:46,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2002 states to 2002 states and 2709 transitions. [2021-11-25 19:56:46,364 INFO L78 Accepts]: Start accepts. Automaton has 2002 states and 2709 transitions. Word has length 121 [2021-11-25 19:56:46,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:56:46,364 INFO L470 AbstractCegarLoop]: Abstraction has 2002 states and 2709 transitions. [2021-11-25 19:56:46,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:46,365 INFO L276 IsEmpty]: Start isEmpty. Operand 2002 states and 2709 transitions. [2021-11-25 19:56:46,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-25 19:56:46,371 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:56:46,372 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:56:46,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-25 19:56:46,372 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:56:46,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:56:46,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1127653853, now seen corresponding path program 1 times [2021-11-25 19:56:46,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:56:46,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157923982] [2021-11-25 19:56:46,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:46,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:56:46,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:46,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:56:46,516 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:56:46,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157923982] [2021-11-25 19:56:46,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157923982] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:56:46,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:56:46,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:56:46,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682504767] [2021-11-25 19:56:46,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:56:46,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:56:46,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:56:46,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:56:46,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:56:46,520 INFO L87 Difference]: Start difference. First operand 2002 states and 2709 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:46,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:56:46,705 INFO L93 Difference]: Finished difference Result 2766 states and 3743 transitions. [2021-11-25 19:56:46,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:56:46,706 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-11-25 19:56:46,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:56:46,713 INFO L225 Difference]: With dead ends: 2766 [2021-11-25 19:56:46,713 INFO L226 Difference]: Without dead ends: 1033 [2021-11-25 19:56:46,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:56:46,719 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 77 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:56:46,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 354 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:56:46,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2021-11-25 19:56:46,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 1031. [2021-11-25 19:56:46,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 1030 states have (on average 1.3320388349514563) internal successors, (1372), 1030 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:46,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1372 transitions. [2021-11-25 19:56:46,849 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1372 transitions. Word has length 121 [2021-11-25 19:56:46,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:56:46,850 INFO L470 AbstractCegarLoop]: Abstraction has 1031 states and 1372 transitions. [2021-11-25 19:56:46,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:46,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1372 transitions. [2021-11-25 19:56:46,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-25 19:56:46,853 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:56:46,854 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:56:46,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-25 19:56:46,855 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:56:46,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:56:46,855 INFO L85 PathProgramCache]: Analyzing trace with hash -357201576, now seen corresponding path program 1 times [2021-11-25 19:56:46,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:56:46,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517505651] [2021-11-25 19:56:46,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:46,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:56:46,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:46,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:56:46,969 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:56:46,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517505651] [2021-11-25 19:56:46,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517505651] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:56:46,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:56:46,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:56:46,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950891031] [2021-11-25 19:56:46,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:56:46,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:56:46,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:56:46,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:56:46,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:56:46,975 INFO L87 Difference]: Start difference. First operand 1031 states and 1372 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:47,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:56:47,092 INFO L93 Difference]: Finished difference Result 1391 states and 1850 transitions. [2021-11-25 19:56:47,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:56:47,093 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-11-25 19:56:47,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:56:47,096 INFO L225 Difference]: With dead ends: 1391 [2021-11-25 19:56:47,096 INFO L226 Difference]: Without dead ends: 550 [2021-11-25 19:56:47,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:56:47,099 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 60 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:56:47,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 341 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:56:47,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-11-25 19:56:47,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 548. [2021-11-25 19:56:47,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 1.3071297989031079) internal successors, (715), 547 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:47,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 715 transitions. [2021-11-25 19:56:47,159 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 715 transitions. Word has length 121 [2021-11-25 19:56:47,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:56:47,160 INFO L470 AbstractCegarLoop]: Abstraction has 548 states and 715 transitions. [2021-11-25 19:56:47,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:47,161 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 715 transitions. [2021-11-25 19:56:47,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-25 19:56:47,163 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:56:47,163 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:56:47,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-25 19:56:47,164 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:56:47,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:56:47,165 INFO L85 PathProgramCache]: Analyzing trace with hash -626796169, now seen corresponding path program 1 times [2021-11-25 19:56:47,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:56:47,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645058462] [2021-11-25 19:56:47,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:47,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:56:47,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:47,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:56:47,613 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:56:47,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645058462] [2021-11-25 19:56:47,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645058462] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:56:47,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:56:47,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 19:56:47,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331999139] [2021-11-25 19:56:47,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:56:47,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 19:56:47,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:56:47,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 19:56:47,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-25 19:56:47,617 INFO L87 Difference]: Start difference. First operand 548 states and 715 transitions. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:48,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:56:48,889 INFO L93 Difference]: Finished difference Result 1867 states and 2423 transitions. [2021-11-25 19:56:48,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 19:56:48,890 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-11-25 19:56:48,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:56:48,898 INFO L225 Difference]: With dead ends: 1867 [2021-11-25 19:56:48,898 INFO L226 Difference]: Without dead ends: 1355 [2021-11-25 19:56:48,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-11-25 19:56:48,900 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 1152 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1152 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 19:56:48,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1152 Valid, 753 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1047 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-25 19:56:48,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2021-11-25 19:56:49,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 870. [2021-11-25 19:56:49,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 1.2738780207134637) internal successors, (1107), 869 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:49,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1107 transitions. [2021-11-25 19:56:49,031 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1107 transitions. Word has length 121 [2021-11-25 19:56:49,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:56:49,032 INFO L470 AbstractCegarLoop]: Abstraction has 870 states and 1107 transitions. [2021-11-25 19:56:49,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:49,032 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1107 transitions. [2021-11-25 19:56:49,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-25 19:56:49,035 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:56:49,036 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:56:49,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-25 19:56:49,036 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:56:49,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:56:49,037 INFO L85 PathProgramCache]: Analyzing trace with hash -958410094, now seen corresponding path program 1 times [2021-11-25 19:56:49,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:56:49,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575194673] [2021-11-25 19:56:49,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:49,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:56:49,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:49,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:56:49,110 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:56:49,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575194673] [2021-11-25 19:56:49,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575194673] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:56:49,111 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:56:49,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:56:49,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512707894] [2021-11-25 19:56:49,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:56:49,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:56:49,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:56:49,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:56:49,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:56:49,113 INFO L87 Difference]: Start difference. First operand 870 states and 1107 transitions. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:49,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:56:49,291 INFO L93 Difference]: Finished difference Result 1652 states and 2104 transitions. [2021-11-25 19:56:49,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:56:49,292 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-11-25 19:56:49,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:56:49,297 INFO L225 Difference]: With dead ends: 1652 [2021-11-25 19:56:49,297 INFO L226 Difference]: Without dead ends: 870 [2021-11-25 19:56:49,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:56:49,300 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 67 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:56:49,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 306 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:56:49,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2021-11-25 19:56:49,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 870. [2021-11-25 19:56:49,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 1.2692750287686996) internal successors, (1103), 869 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:49,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1103 transitions. [2021-11-25 19:56:49,412 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1103 transitions. Word has length 121 [2021-11-25 19:56:49,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:56:49,413 INFO L470 AbstractCegarLoop]: Abstraction has 870 states and 1103 transitions. [2021-11-25 19:56:49,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:49,413 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1103 transitions. [2021-11-25 19:56:49,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-25 19:56:49,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:56:49,417 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:56:49,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-25 19:56:49,418 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:56:49,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:56:49,419 INFO L85 PathProgramCache]: Analyzing trace with hash 320956821, now seen corresponding path program 1 times [2021-11-25 19:56:49,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:56:49,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765611873] [2021-11-25 19:56:49,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:49,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:56:49,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:49,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:56:49,518 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:56:49,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765611873] [2021-11-25 19:56:49,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765611873] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:56:49,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:56:49,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:56:49,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69823915] [2021-11-25 19:56:49,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:56:49,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:56:49,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:56:49,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:56:49,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:56:49,522 INFO L87 Difference]: Start difference. First operand 870 states and 1103 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:49,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:56:49,809 INFO L93 Difference]: Finished difference Result 1710 states and 2166 transitions. [2021-11-25 19:56:49,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:56:49,810 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-11-25 19:56:49,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:56:49,815 INFO L225 Difference]: With dead ends: 1710 [2021-11-25 19:56:49,815 INFO L226 Difference]: Without dead ends: 870 [2021-11-25 19:56:49,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:56:49,817 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 88 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:56:49,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 223 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:56:49,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2021-11-25 19:56:49,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 870. [2021-11-25 19:56:49,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 1.2669735327963176) internal successors, (1101), 869 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:49,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1101 transitions. [2021-11-25 19:56:49,949 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1101 transitions. Word has length 122 [2021-11-25 19:56:49,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:56:49,949 INFO L470 AbstractCegarLoop]: Abstraction has 870 states and 1101 transitions. [2021-11-25 19:56:49,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:49,950 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1101 transitions. [2021-11-25 19:56:49,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-25 19:56:49,953 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:56:49,953 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:56:49,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-25 19:56:49,954 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:56:49,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:56:49,954 INFO L85 PathProgramCache]: Analyzing trace with hash 419078650, now seen corresponding path program 1 times [2021-11-25 19:56:49,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:56:49,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884294358] [2021-11-25 19:56:49,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:49,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:56:50,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:50,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:56:50,051 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:56:50,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884294358] [2021-11-25 19:56:50,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884294358] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:56:50,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:56:50,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:56:50,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186799711] [2021-11-25 19:56:50,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:56:50,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:56:50,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:56:50,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:56:50,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:56:50,054 INFO L87 Difference]: Start difference. First operand 870 states and 1101 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:50,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:56:50,324 INFO L93 Difference]: Finished difference Result 1722 states and 2178 transitions. [2021-11-25 19:56:50,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:56:50,325 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-11-25 19:56:50,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:56:50,330 INFO L225 Difference]: With dead ends: 1722 [2021-11-25 19:56:50,330 INFO L226 Difference]: Without dead ends: 870 [2021-11-25 19:56:50,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:56:50,333 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 87 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:56:50,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 224 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:56:50,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2021-11-25 19:56:50,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 870. [2021-11-25 19:56:50,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 1.2646720368239355) internal successors, (1099), 869 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:50,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1099 transitions. [2021-11-25 19:56:50,446 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1099 transitions. Word has length 122 [2021-11-25 19:56:50,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:56:50,447 INFO L470 AbstractCegarLoop]: Abstraction has 870 states and 1099 transitions. [2021-11-25 19:56:50,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:50,447 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1099 transitions. [2021-11-25 19:56:50,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-25 19:56:50,450 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:56:50,450 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:56:50,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-25 19:56:50,451 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:56:50,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:56:50,452 INFO L85 PathProgramCache]: Analyzing trace with hash 243130549, now seen corresponding path program 1 times [2021-11-25 19:56:50,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:56:50,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012771963] [2021-11-25 19:56:50,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:50,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:56:50,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:50,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:56:50,645 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:56:50,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012771963] [2021-11-25 19:56:50,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012771963] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:56:50,645 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:56:50,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:56:50,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224755964] [2021-11-25 19:56:50,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:56:50,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:56:50,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:56:50,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:56:50,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:56:50,648 INFO L87 Difference]: Start difference. First operand 870 states and 1099 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:50,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:56:50,887 INFO L93 Difference]: Finished difference Result 1464 states and 1856 transitions. [2021-11-25 19:56:50,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:56:50,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-11-25 19:56:50,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:56:50,894 INFO L225 Difference]: With dead ends: 1464 [2021-11-25 19:56:50,894 INFO L226 Difference]: Without dead ends: 870 [2021-11-25 19:56:50,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:56:50,896 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 143 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:56:50,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 103 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:56:50,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2021-11-25 19:56:51,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 870. [2021-11-25 19:56:51,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 1.2508630609896432) internal successors, (1087), 869 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:51,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1087 transitions. [2021-11-25 19:56:51,020 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1087 transitions. Word has length 122 [2021-11-25 19:56:51,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:56:51,020 INFO L470 AbstractCegarLoop]: Abstraction has 870 states and 1087 transitions. [2021-11-25 19:56:51,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:51,021 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1087 transitions. [2021-11-25 19:56:51,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-25 19:56:51,023 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:56:51,024 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:56:51,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-25 19:56:51,024 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:56:51,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:56:51,025 INFO L85 PathProgramCache]: Analyzing trace with hash -926127829, now seen corresponding path program 1 times [2021-11-25 19:56:51,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:56:51,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223438982] [2021-11-25 19:56:51,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:51,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:56:51,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:51,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:56:51,115 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:56:51,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223438982] [2021-11-25 19:56:51,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223438982] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:56:51,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:56:51,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:56:51,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60903751] [2021-11-25 19:56:51,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:56:51,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:56:51,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:56:51,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:56:51,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:56:51,118 INFO L87 Difference]: Start difference. First operand 870 states and 1087 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:51,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:56:51,428 INFO L93 Difference]: Finished difference Result 1590 states and 1994 transitions. [2021-11-25 19:56:51,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:56:51,429 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-11-25 19:56:51,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:56:51,434 INFO L225 Difference]: With dead ends: 1590 [2021-11-25 19:56:51,434 INFO L226 Difference]: Without dead ends: 756 [2021-11-25 19:56:51,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:56:51,438 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 44 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:56:51,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 294 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:56:51,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-11-25 19:56:51,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 756. [2021-11-25 19:56:51,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 1.2582781456953642) internal successors, (950), 755 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:51,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 950 transitions. [2021-11-25 19:56:51,534 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 950 transitions. Word has length 122 [2021-11-25 19:56:51,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:56:51,534 INFO L470 AbstractCegarLoop]: Abstraction has 756 states and 950 transitions. [2021-11-25 19:56:51,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:51,534 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 950 transitions. [2021-11-25 19:56:51,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-25 19:56:51,537 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:56:51,537 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:56:51,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-25 19:56:51,538 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:56:51,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:56:51,538 INFO L85 PathProgramCache]: Analyzing trace with hash -327274955, now seen corresponding path program 1 times [2021-11-25 19:56:51,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:56:51,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614291969] [2021-11-25 19:56:51,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:51,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:56:51,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:51,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:56:51,650 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:56:51,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614291969] [2021-11-25 19:56:51,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614291969] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:56:51,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:56:51,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:56:51,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213079517] [2021-11-25 19:56:51,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:56:51,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:56:51,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:56:51,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:56:51,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:56:51,654 INFO L87 Difference]: Start difference. First operand 756 states and 950 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:51,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:56:51,963 INFO L93 Difference]: Finished difference Result 1692 states and 2136 transitions. [2021-11-25 19:56:51,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:56:51,963 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-11-25 19:56:51,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:56:51,969 INFO L225 Difference]: With dead ends: 1692 [2021-11-25 19:56:51,969 INFO L226 Difference]: Without dead ends: 972 [2021-11-25 19:56:51,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:56:51,972 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 350 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:56:51,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 276 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:56:51,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2021-11-25 19:56:52,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 970. [2021-11-25 19:56:52,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 970 states, 969 states have (on average 1.2549019607843137) internal successors, (1216), 969 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:52,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 1216 transitions. [2021-11-25 19:56:52,091 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 1216 transitions. Word has length 122 [2021-11-25 19:56:52,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:56:52,092 INFO L470 AbstractCegarLoop]: Abstraction has 970 states and 1216 transitions. [2021-11-25 19:56:52,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:52,092 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 1216 transitions. [2021-11-25 19:56:52,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-25 19:56:52,095 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:56:52,096 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:56:52,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-25 19:56:52,096 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:56:52,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:56:52,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1059762394, now seen corresponding path program 1 times [2021-11-25 19:56:52,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:56:52,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555257455] [2021-11-25 19:56:52,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:52,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:56:52,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:52,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:56:52,237 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:56:52,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555257455] [2021-11-25 19:56:52,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555257455] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:56:52,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:56:52,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:56:52,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697519846] [2021-11-25 19:56:52,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:56:52,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:56:52,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:56:52,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:56:52,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:56:52,240 INFO L87 Difference]: Start difference. First operand 970 states and 1216 transitions. Second operand has 5 states, 5 states have (on average 24.4) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:52,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:56:52,484 INFO L93 Difference]: Finished difference Result 1746 states and 2193 transitions. [2021-11-25 19:56:52,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:56:52,485 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-11-25 19:56:52,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:56:52,491 INFO L225 Difference]: With dead ends: 1746 [2021-11-25 19:56:52,491 INFO L226 Difference]: Without dead ends: 970 [2021-11-25 19:56:52,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:56:52,493 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 228 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:56:52,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 89 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:56:52,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2021-11-25 19:56:52,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 970. [2021-11-25 19:56:52,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 970 states, 969 states have (on average 1.238390092879257) internal successors, (1200), 969 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:52,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 1200 transitions. [2021-11-25 19:56:52,617 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 1200 transitions. Word has length 122 [2021-11-25 19:56:52,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:56:52,618 INFO L470 AbstractCegarLoop]: Abstraction has 970 states and 1200 transitions. [2021-11-25 19:56:52,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:52,618 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 1200 transitions. [2021-11-25 19:56:52,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-25 19:56:52,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:56:52,621 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:56:52,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-25 19:56:52,622 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:56:52,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:56:52,622 INFO L85 PathProgramCache]: Analyzing trace with hash -2118508033, now seen corresponding path program 1 times [2021-11-25 19:56:52,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:56:52,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015505351] [2021-11-25 19:56:52,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:52,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:56:52,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:52,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:56:52,766 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:56:52,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015505351] [2021-11-25 19:56:52,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015505351] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:56:52,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:56:52,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:56:52,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667961520] [2021-11-25 19:56:52,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:56:52,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:56:52,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:56:52,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:56:52,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:56:52,769 INFO L87 Difference]: Start difference. First operand 970 states and 1200 transitions. Second operand has 5 states, 5 states have (on average 24.4) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:53,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:56:53,068 INFO L93 Difference]: Finished difference Result 1383 states and 1726 transitions. [2021-11-25 19:56:53,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:56:53,069 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-11-25 19:56:53,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:56:53,075 INFO L225 Difference]: With dead ends: 1383 [2021-11-25 19:56:53,075 INFO L226 Difference]: Without dead ends: 958 [2021-11-25 19:56:53,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:56:53,077 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 225 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:56:53,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 86 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:56:53,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2021-11-25 19:56:53,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 740. [2021-11-25 19:56:53,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 1.225981055480379) internal successors, (906), 739 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:53,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 906 transitions. [2021-11-25 19:56:53,207 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 906 transitions. Word has length 122 [2021-11-25 19:56:53,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:56:53,208 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 906 transitions. [2021-11-25 19:56:53,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:53,208 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 906 transitions. [2021-11-25 19:56:53,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-25 19:56:53,211 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:56:53,211 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:56:53,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-25 19:56:53,212 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:56:53,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:56:53,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1075215433, now seen corresponding path program 1 times [2021-11-25 19:56:53,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:56:53,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90503312] [2021-11-25 19:56:53,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:53,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:56:53,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:53,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:56:53,498 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:56:53,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90503312] [2021-11-25 19:56:53,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90503312] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:56:53,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:56:53,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:56:53,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445507285] [2021-11-25 19:56:53,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:56:53,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:56:53,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:56:53,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:56:53,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:56:53,502 INFO L87 Difference]: Start difference. First operand 740 states and 906 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:53,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:56:53,675 INFO L93 Difference]: Finished difference Result 1382 states and 1695 transitions. [2021-11-25 19:56:53,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:56:53,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-11-25 19:56:53,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:56:53,681 INFO L225 Difference]: With dead ends: 1382 [2021-11-25 19:56:53,681 INFO L226 Difference]: Without dead ends: 740 [2021-11-25 19:56:53,682 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 [2021-11-25 19:56:53,683 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 1 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:56:53,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 497 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:56:53,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-11-25 19:56:53,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 740. [2021-11-25 19:56:53,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 1.2151556156968877) internal successors, (898), 739 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:53,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 898 transitions. [2021-11-25 19:56:53,808 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 898 transitions. Word has length 122 [2021-11-25 19:56:53,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:56:53,809 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 898 transitions. [2021-11-25 19:56:53,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:53,809 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 898 transitions. [2021-11-25 19:56:53,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-25 19:56:53,812 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:56:53,812 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:56:53,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-25 19:56:53,813 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:56:53,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:56:53,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1115668327, now seen corresponding path program 1 times [2021-11-25 19:56:53,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:56:53,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031558207] [2021-11-25 19:56:53,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:53,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:56:53,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:53,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:56:53,913 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:56:53,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031558207] [2021-11-25 19:56:53,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031558207] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:56:53,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:56:53,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:56:53,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160186650] [2021-11-25 19:56:53,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:56:53,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:56:53,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:56:53,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:56:53,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:56:53,915 INFO L87 Difference]: Start difference. First operand 740 states and 898 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:54,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:56:54,129 INFO L93 Difference]: Finished difference Result 1364 states and 1658 transitions. [2021-11-25 19:56:54,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:56:54,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-11-25 19:56:54,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:56:54,135 INFO L225 Difference]: With dead ends: 1364 [2021-11-25 19:56:54,136 INFO L226 Difference]: Without dead ends: 979 [2021-11-25 19:56:54,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:56:54,138 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 80 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:56:54,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 304 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:56:54,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2021-11-25 19:56:54,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 931. [2021-11-25 19:56:54,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 1.20752688172043) internal successors, (1123), 930 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:54,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1123 transitions. [2021-11-25 19:56:54,274 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1123 transitions. Word has length 124 [2021-11-25 19:56:54,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:56:54,274 INFO L470 AbstractCegarLoop]: Abstraction has 931 states and 1123 transitions. [2021-11-25 19:56:54,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:54,275 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1123 transitions. [2021-11-25 19:56:54,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-25 19:56:54,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:56:54,278 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:56:54,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-25 19:56:54,279 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:56:54,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:56:54,280 INFO L85 PathProgramCache]: Analyzing trace with hash 50659523, now seen corresponding path program 1 times [2021-11-25 19:56:54,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:56:54,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65065132] [2021-11-25 19:56:54,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:54,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:56:54,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:54,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:56:54,367 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:56:54,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65065132] [2021-11-25 19:56:54,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65065132] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:56:54,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:56:54,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:56:54,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587186114] [2021-11-25 19:56:54,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:56:54,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:56:54,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:56:54,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:56:54,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:56:54,370 INFO L87 Difference]: Start difference. First operand 931 states and 1123 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:54,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:56:54,486 INFO L93 Difference]: Finished difference Result 1169 states and 1411 transitions. [2021-11-25 19:56:54,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:56:54,487 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-11-25 19:56:54,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:56:54,489 INFO L225 Difference]: With dead ends: 1169 [2021-11-25 19:56:54,489 INFO L226 Difference]: Without dead ends: 375 [2021-11-25 19:56:54,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:56:54,492 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 40 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:56:54,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 290 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:56:54,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-11-25 19:56:54,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 373. [2021-11-25 19:56:54,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 1.174731182795699) internal successors, (437), 372 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:54,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 437 transitions. [2021-11-25 19:56:54,548 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 437 transitions. Word has length 124 [2021-11-25 19:56:54,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:56:54,548 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 437 transitions. [2021-11-25 19:56:54,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:54,548 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 437 transitions. [2021-11-25 19:56:54,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-25 19:56:54,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:56:54,551 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:56:54,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-25 19:56:54,552 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:56:54,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:56:54,552 INFO L85 PathProgramCache]: Analyzing trace with hash -73959668, now seen corresponding path program 1 times [2021-11-25 19:56:54,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:56:54,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680913456] [2021-11-25 19:56:54,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:54,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:56:54,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:54,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:56:54,799 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:56:54,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680913456] [2021-11-25 19:56:54,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680913456] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:56:54,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:56:54,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:56:54,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750933223] [2021-11-25 19:56:54,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:56:54,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:56:54,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:56:54,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:56:54,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:56:54,803 INFO L87 Difference]: Start difference. First operand 373 states and 437 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:54,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:56:54,927 INFO L93 Difference]: Finished difference Result 555 states and 656 transitions. [2021-11-25 19:56:54,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:56:54,928 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2021-11-25 19:56:54,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:56:54,930 INFO L225 Difference]: With dead ends: 555 [2021-11-25 19:56:54,930 INFO L226 Difference]: Without dead ends: 369 [2021-11-25 19:56:54,932 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 [2021-11-25 19:56:54,932 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 1 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:56:54,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 464 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:56:54,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-11-25 19:56:54,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 369. [2021-11-25 19:56:54,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 1.1657608695652173) internal successors, (429), 368 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:54,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 429 transitions. [2021-11-25 19:56:54,990 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 429 transitions. Word has length 126 [2021-11-25 19:56:54,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:56:54,991 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 429 transitions. [2021-11-25 19:56:54,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:54,991 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 429 transitions. [2021-11-25 19:56:54,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-25 19:56:54,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:56:54,993 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:56:54,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-25 19:56:54,994 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:56:54,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:56:54,994 INFO L85 PathProgramCache]: Analyzing trace with hash 2119929188, now seen corresponding path program 1 times [2021-11-25 19:56:54,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:56:54,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341529103] [2021-11-25 19:56:54,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:54,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:56:55,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:55,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:56:55,266 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:56:55,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341529103] [2021-11-25 19:56:55,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341529103] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:56:55,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:56:55,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-25 19:56:55,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559636337] [2021-11-25 19:56:55,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:56:55,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 19:56:55,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:56:55,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 19:56:55,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-25 19:56:55,269 INFO L87 Difference]: Start difference. First operand 369 states and 429 transitions. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:55,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:56:55,658 INFO L93 Difference]: Finished difference Result 870 states and 1018 transitions. [2021-11-25 19:56:55,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 19:56:55,658 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-11-25 19:56:55,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:56:55,662 INFO L225 Difference]: With dead ends: 870 [2021-11-25 19:56:55,663 INFO L226 Difference]: Without dead ends: 650 [2021-11-25 19:56:55,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-11-25 19:56:55,664 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 249 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 971 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:56:55,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 971 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:56:55,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-11-25 19:56:55,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 586. [2021-11-25 19:56:55,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 1.158974358974359) internal successors, (678), 585 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:55,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 678 transitions. [2021-11-25 19:56:55,780 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 678 transitions. Word has length 130 [2021-11-25 19:56:55,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:56:55,781 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 678 transitions. [2021-11-25 19:56:55,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:55,781 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 678 transitions. [2021-11-25 19:56:55,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-25 19:56:55,783 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:56:55,784 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:56:55,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-25 19:56:55,784 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:56:55,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:56:55,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1429887656, now seen corresponding path program 1 times [2021-11-25 19:56:55,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:56:55,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415705169] [2021-11-25 19:56:55,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:55,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:56:55,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:55,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:56:55,876 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:56:55,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415705169] [2021-11-25 19:56:55,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415705169] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:56:55,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:56:55,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:56:55,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102091555] [2021-11-25 19:56:55,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:56:55,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:56:55,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:56:55,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:56:55,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:56:55,879 INFO L87 Difference]: Start difference. First operand 586 states and 678 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:56,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:56:56,026 INFO L93 Difference]: Finished difference Result 978 states and 1134 transitions. [2021-11-25 19:56:56,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:56:56,027 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-11-25 19:56:56,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:56:56,031 INFO L225 Difference]: With dead ends: 978 [2021-11-25 19:56:56,031 INFO L226 Difference]: Without dead ends: 612 [2021-11-25 19:56:56,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:56:56,033 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 71 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:56:56,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 373 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:56:56,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-11-25 19:56:56,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 588. [2021-11-25 19:56:56,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 1.1550255536626917) internal successors, (678), 587 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:56,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 678 transitions. [2021-11-25 19:56:56,126 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 678 transitions. Word has length 131 [2021-11-25 19:56:56,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:56:56,127 INFO L470 AbstractCegarLoop]: Abstraction has 588 states and 678 transitions. [2021-11-25 19:56:56,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:56,128 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 678 transitions. [2021-11-25 19:56:56,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-25 19:56:56,130 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:56:56,130 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:56:56,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-25 19:56:56,131 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:56:56,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:56:56,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1432836965, now seen corresponding path program 1 times [2021-11-25 19:56:56,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:56:56,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573786583] [2021-11-25 19:56:56,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:56,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:56:56,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:56,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:56:56,228 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:56:56,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573786583] [2021-11-25 19:56:56,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573786583] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:56:56,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:56:56,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:56:56,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863823548] [2021-11-25 19:56:56,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:56:56,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:56:56,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:56:56,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:56:56,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:56:56,231 INFO L87 Difference]: Start difference. First operand 588 states and 678 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:56,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:56:56,413 INFO L93 Difference]: Finished difference Result 1049 states and 1215 transitions. [2021-11-25 19:56:56,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:56:56,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-11-25 19:56:56,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:56:56,418 INFO L225 Difference]: With dead ends: 1049 [2021-11-25 19:56:56,418 INFO L226 Difference]: Without dead ends: 683 [2021-11-25 19:56:56,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:56:56,421 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 66 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:56:56,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 372 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:56:56,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-11-25 19:56:56,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 659. [2021-11-25 19:56:56,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 658 states have (on average 1.1534954407294833) internal successors, (759), 658 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:56,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 759 transitions. [2021-11-25 19:56:56,551 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 759 transitions. Word has length 131 [2021-11-25 19:56:56,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:56:56,551 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 759 transitions. [2021-11-25 19:56:56,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:56,552 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 759 transitions. [2021-11-25 19:56:56,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-25 19:56:56,554 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:56:56,555 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:56:56,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-25 19:56:56,555 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:56:56,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:56:56,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1446230003, now seen corresponding path program 1 times [2021-11-25 19:56:56,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:56:56,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714120448] [2021-11-25 19:56:56,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:56,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:56:56,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:56,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:56:56,704 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:56:56,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714120448] [2021-11-25 19:56:56,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714120448] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:56:56,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:56:56,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 19:56:56,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984882570] [2021-11-25 19:56:56,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:56:56,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:56:56,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:56:56,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:56:56,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:56:56,707 INFO L87 Difference]: Start difference. First operand 659 states and 759 transitions. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:57,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:56:57,044 INFO L93 Difference]: Finished difference Result 802 states and 920 transitions. [2021-11-25 19:56:57,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 19:56:57,045 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-11-25 19:56:57,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:56:57,061 INFO L225 Difference]: With dead ends: 802 [2021-11-25 19:56:57,061 INFO L226 Difference]: Without dead ends: 800 [2021-11-25 19:56:57,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-25 19:56:57,062 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 200 mSDsluCounter, 910 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 1120 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:56:57,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 1120 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:56:57,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-11-25 19:56:57,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 659. [2021-11-25 19:56:57,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 658 states have (on average 1.1504559270516717) internal successors, (757), 658 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:57,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 757 transitions. [2021-11-25 19:56:57,164 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 757 transitions. Word has length 132 [2021-11-25 19:56:57,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:56:57,164 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 757 transitions. [2021-11-25 19:56:57,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:57,165 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 757 transitions. [2021-11-25 19:56:57,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-25 19:56:57,167 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:56:57,167 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:56:57,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-25 19:56:57,168 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:56:57,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:56:57,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1520578070, now seen corresponding path program 1 times [2021-11-25 19:56:57,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:56:57,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424739138] [2021-11-25 19:56:57,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:57,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:56:57,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:57,270 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 19:56:57,271 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:56:57,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424739138] [2021-11-25 19:56:57,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424739138] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:56:57,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:56:57,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:56:57,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459679571] [2021-11-25 19:56:57,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:56:57,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:56:57,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:56:57,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:56:57,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:56:57,273 INFO L87 Difference]: Start difference. First operand 659 states and 757 transitions. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:57,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:56:57,428 INFO L93 Difference]: Finished difference Result 1098 states and 1267 transitions. [2021-11-25 19:56:57,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:56:57,429 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-11-25 19:56:57,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:56:57,432 INFO L225 Difference]: With dead ends: 1098 [2021-11-25 19:56:57,432 INFO L226 Difference]: Without dead ends: 590 [2021-11-25 19:56:57,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:56:57,434 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 141 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:56:57,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 299 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:56:57,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-11-25 19:56:57,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 590. [2021-11-25 19:56:57,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 589 states have (on average 1.1477079796264855) internal successors, (676), 589 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:57,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 676 transitions. [2021-11-25 19:56:57,549 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 676 transitions. Word has length 145 [2021-11-25 19:56:57,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:56:57,549 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 676 transitions. [2021-11-25 19:56:57,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:57,549 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 676 transitions. [2021-11-25 19:56:57,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-25 19:56:57,552 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:56:57,552 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:56:57,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-25 19:56:57,553 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:56:57,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:56:57,553 INFO L85 PathProgramCache]: Analyzing trace with hash -61693573, now seen corresponding path program 1 times [2021-11-25 19:56:57,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:56:57,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900647039] [2021-11-25 19:56:57,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:57,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:56:57,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:57,844 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 19:56:57,844 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:56:57,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900647039] [2021-11-25 19:56:57,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900647039] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:56:57,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:56:57,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:56:57,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028826876] [2021-11-25 19:56:57,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:56:57,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:56:57,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:56:57,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:56:57,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:56:57,846 INFO L87 Difference]: Start difference. First operand 590 states and 676 transitions. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:58,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:56:58,032 INFO L93 Difference]: Finished difference Result 997 states and 1152 transitions. [2021-11-25 19:56:58,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:56:58,033 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2021-11-25 19:56:58,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:56:58,035 INFO L225 Difference]: With dead ends: 997 [2021-11-25 19:56:58,035 INFO L226 Difference]: Without dead ends: 598 [2021-11-25 19:56:58,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:56:58,037 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 251 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:56:58,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 341 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:56:58,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-11-25 19:56:58,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 519. [2021-11-25 19:56:58,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 518 states have (on average 1.1447876447876448) internal successors, (593), 518 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:58,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 593 transitions. [2021-11-25 19:56:58,129 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 593 transitions. Word has length 147 [2021-11-25 19:56:58,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:56:58,130 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 593 transitions. [2021-11-25 19:56:58,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:58,130 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 593 transitions. [2021-11-25 19:56:58,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-25 19:56:58,131 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:56:58,132 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:56:58,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-25 19:56:58,132 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:56:58,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:56:58,133 INFO L85 PathProgramCache]: Analyzing trace with hash 2104262514, now seen corresponding path program 1 times [2021-11-25 19:56:58,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:56:58,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594944448] [2021-11-25 19:56:58,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:58,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:56:59,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat