./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/bin/utaipan-g80aRyZoba --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 4f742293e1d7618171cf3a543c4629a6bee745f5c0d4fe8b828e91b8996c2b07 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 00:31:23,503 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 00:31:23,505 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 00:31:23,542 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 00:31:23,544 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 00:31:23,548 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 00:31:23,551 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 00:31:23,554 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 00:31:23,557 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 00:31:23,563 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 00:31:23,564 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 00:31:23,567 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 00:31:23,567 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 00:31:23,573 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 00:31:23,574 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 00:31:23,577 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 00:31:23,579 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 00:31:23,580 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 00:31:23,582 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 00:31:23,591 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 00:31:23,593 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 00:31:23,596 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 00:31:23,597 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 00:31:23,598 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 00:31:23,609 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 00:31:23,610 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 00:31:23,610 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 00:31:23,613 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 00:31:23,613 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 00:31:23,615 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 00:31:23,615 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 00:31:23,616 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 00:31:23,618 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 00:31:23,619 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 00:31:23,620 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 00:31:23,621 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 00:31:23,622 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 00:31:23,622 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 00:31:23,622 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 00:31:23,624 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 00:31:23,625 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 00:31:23,625 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 00:31:23,670 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 00:31:23,671 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 00:31:23,671 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 00:31:23,672 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 00:31:23,673 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 00:31:23,673 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 00:31:23,673 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 00:31:23,673 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 00:31:23,674 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 00:31:23,674 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 00:31:23,675 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 00:31:23,675 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 00:31:23,675 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 00:31:23,676 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 00:31:23,676 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 00:31:23,676 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 00:31:23,676 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 00:31:23,677 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 00:31:23,678 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 00:31:23,678 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 00:31:23,678 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 00:31:23,679 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 00:31:23,679 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 00:31:23,679 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 00:31:23,679 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 00:31:23,679 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 00:31:23,680 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 00:31:23,680 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 00:31:23,680 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 00:31:23,680 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 00:31:23,681 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 00:31:23,681 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 00:31:23,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:31:23,682 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 00:31:23,682 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 00:31:23,682 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 00:31:23,682 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 00:31:23,683 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 00:31:23,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 00:31:23,683 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 00:31:23,683 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 00:31:23,683 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f742293e1d7618171cf3a543c4629a6bee745f5c0d4fe8b828e91b8996c2b07 [2022-11-22 00:31:23,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 00:31:23,974 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 00:31:23,977 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 00:31:23,978 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 00:31:23,978 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 00:31:23,980 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2022-11-22 00:31:27,205 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 00:31:27,496 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 00:31:27,496 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2022-11-22 00:31:27,508 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/bin/utaipan-g80aRyZoba/data/f50887c63/de291a6292ab4ca4bfdeea7d2ca94af0/FLAG95662a639 [2022-11-22 00:31:27,527 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/bin/utaipan-g80aRyZoba/data/f50887c63/de291a6292ab4ca4bfdeea7d2ca94af0 [2022-11-22 00:31:27,530 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 00:31:27,532 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 00:31:27,536 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 00:31:27,536 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 00:31:27,540 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 00:31:27,541 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:31:27" (1/1) ... [2022-11-22 00:31:27,543 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cc10a41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:27, skipping insertion in model container [2022-11-22 00:31:27,543 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:31:27" (1/1) ... [2022-11-22 00:31:27,551 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 00:31:27,619 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 00:31:27,826 WARN L237 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_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7233,7246] [2022-11-22 00:31:27,864 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:31:27,883 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 00:31:27,933 WARN L237 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_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7233,7246] [2022-11-22 00:31:27,959 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:31:27,981 INFO L208 MainTranslator]: Completed translation [2022-11-22 00:31:27,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:27 WrapperNode [2022-11-22 00:31:27,982 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 00:31:27,983 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 00:31:27,983 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 00:31:27,984 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 00:31:27,992 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:27" (1/1) ... [2022-11-22 00:31:28,004 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:27" (1/1) ... [2022-11-22 00:31:28,038 INFO L138 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 588 [2022-11-22 00:31:28,039 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 00:31:28,040 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 00:31:28,040 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 00:31:28,040 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 00:31:28,050 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:27" (1/1) ... [2022-11-22 00:31:28,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:27" (1/1) ... [2022-11-22 00:31:28,054 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:27" (1/1) ... [2022-11-22 00:31:28,055 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:27" (1/1) ... [2022-11-22 00:31:28,063 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:27" (1/1) ... [2022-11-22 00:31:28,068 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:27" (1/1) ... [2022-11-22 00:31:28,071 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:27" (1/1) ... [2022-11-22 00:31:28,074 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:27" (1/1) ... [2022-11-22 00:31:28,079 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 00:31:28,080 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 00:31:28,080 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 00:31:28,080 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 00:31:28,081 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:27" (1/1) ... [2022-11-22 00:31:28,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:31:28,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:31:28,118 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 00:31:28,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 00:31:28,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 00:31:28,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 00:31:28,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 00:31:28,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 00:31:28,369 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 00:31:28,387 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 00:31:29,123 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 00:31:29,417 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 00:31:29,417 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-22 00:31:29,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:31:29 BoogieIcfgContainer [2022-11-22 00:31:29,421 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 00:31:29,424 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 00:31:29,425 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 00:31:29,428 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 00:31:29,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:31:27" (1/3) ... [2022-11-22 00:31:29,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c7aafde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:31:29, skipping insertion in model container [2022-11-22 00:31:29,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:27" (2/3) ... [2022-11-22 00:31:29,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c7aafde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:31:29, skipping insertion in model container [2022-11-22 00:31:29,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:31:29" (3/3) ... [2022-11-22 00:31:29,433 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2022-11-22 00:31:29,450 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 00:31:29,450 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 00:31:29,509 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 00:31:29,518 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7a26e9f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 00:31:29,519 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 00:31:29,525 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 85 states have (on average 1.7647058823529411) internal successors, (150), 86 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:29,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-22 00:31:29,536 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:29,537 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:31:29,538 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:29,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:29,545 INFO L85 PathProgramCache]: Analyzing trace with hash 223748202, now seen corresponding path program 1 times [2022-11-22 00:31:29,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:29,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946985890] [2022-11-22 00:31:29,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:29,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:29,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:30,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:31:30,144 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:30,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946985890] [2022-11-22 00:31:30,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946985890] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:30,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:30,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:31:30,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347524383] [2022-11-22 00:31:30,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:30,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:31:30,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:30,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:31:30,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:31:30,192 INFO L87 Difference]: Start difference. First operand has 87 states, 85 states have (on average 1.7647058823529411) internal successors, (150), 86 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:30,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:30,349 INFO L93 Difference]: Finished difference Result 191 states and 317 transitions. [2022-11-22 00:31:30,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:31:30,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-22 00:31:30,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:30,366 INFO L225 Difference]: With dead ends: 191 [2022-11-22 00:31:30,366 INFO L226 Difference]: Without dead ends: 129 [2022-11-22 00:31:30,370 INFO L412 NwaCegarLoop]: 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 [2022-11-22 00:31:30,378 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 92 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:30,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 322 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:31:30,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-22 00:31:30,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2022-11-22 00:31:30,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.492063492063492) internal successors, (188), 126 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:30,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 188 transitions. [2022-11-22 00:31:30,472 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 188 transitions. Word has length 38 [2022-11-22 00:31:30,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:30,474 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 188 transitions. [2022-11-22 00:31:30,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:30,475 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 188 transitions. [2022-11-22 00:31:30,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-22 00:31:30,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:30,479 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:31:30,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 00:31:30,481 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:30,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:30,482 INFO L85 PathProgramCache]: Analyzing trace with hash -679526618, now seen corresponding path program 1 times [2022-11-22 00:31:30,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:30,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515841535] [2022-11-22 00:31:30,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:30,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:30,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:30,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:31:30,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:30,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515841535] [2022-11-22 00:31:30,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515841535] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:30,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:30,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:31:30,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740059075] [2022-11-22 00:31:30,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:30,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:31:30,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:30,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:31:30,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:31:30,700 INFO L87 Difference]: Start difference. First operand 127 states and 188 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:30,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:30,807 INFO L93 Difference]: Finished difference Result 282 states and 437 transitions. [2022-11-22 00:31:30,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:31:30,808 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-22 00:31:30,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:30,810 INFO L225 Difference]: With dead ends: 282 [2022-11-22 00:31:30,811 INFO L226 Difference]: Without dead ends: 184 [2022-11-22 00:31:30,812 INFO L412 NwaCegarLoop]: 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 [2022-11-22 00:31:30,813 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 81 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:30,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 194 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:31:30,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-22 00:31:30,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2022-11-22 00:31:30,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.5082872928176796) internal successors, (273), 181 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:30,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 273 transitions. [2022-11-22 00:31:30,841 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 273 transitions. Word has length 40 [2022-11-22 00:31:30,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:30,842 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 273 transitions. [2022-11-22 00:31:30,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:30,843 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 273 transitions. [2022-11-22 00:31:30,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-22 00:31:30,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:30,845 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:31:30,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 00:31:30,845 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:30,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:30,846 INFO L85 PathProgramCache]: Analyzing trace with hash 128704147, now seen corresponding path program 1 times [2022-11-22 00:31:30,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:30,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168480980] [2022-11-22 00:31:30,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:30,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:30,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:30,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:31:30,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:30,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168480980] [2022-11-22 00:31:30,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168480980] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:30,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:30,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:31:30,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117128621] [2022-11-22 00:31:30,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:30,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:31:30,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:30,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:31:30,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:31:30,956 INFO L87 Difference]: Start difference. First operand 182 states and 273 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:31,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:31,037 INFO L93 Difference]: Finished difference Result 448 states and 700 transitions. [2022-11-22 00:31:31,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:31:31,038 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-11-22 00:31:31,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:31,041 INFO L225 Difference]: With dead ends: 448 [2022-11-22 00:31:31,041 INFO L226 Difference]: Without dead ends: 297 [2022-11-22 00:31:31,042 INFO L412 NwaCegarLoop]: 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 [2022-11-22 00:31:31,043 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 82 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:31,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 244 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:31:31,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-11-22 00:31:31,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 295. [2022-11-22 00:31:31,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 1.5442176870748299) internal successors, (454), 294 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:31,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 454 transitions. [2022-11-22 00:31:31,086 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 454 transitions. Word has length 42 [2022-11-22 00:31:31,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:31,087 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 454 transitions. [2022-11-22 00:31:31,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:31,087 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 454 transitions. [2022-11-22 00:31:31,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-22 00:31:31,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:31,089 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:31:31,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 00:31:31,090 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:31,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:31,090 INFO L85 PathProgramCache]: Analyzing trace with hash -725243457, now seen corresponding path program 1 times [2022-11-22 00:31:31,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:31,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078236200] [2022-11-22 00:31:31,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:31,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:31,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:31,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:31:31,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:31,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078236200] [2022-11-22 00:31:31,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078236200] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:31,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:31,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:31:31,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878231288] [2022-11-22 00:31:31,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:31,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:31:31,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:31,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:31:31,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:31:31,247 INFO L87 Difference]: Start difference. First operand 295 states and 454 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:31,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:31,324 INFO L93 Difference]: Finished difference Result 723 states and 1138 transitions. [2022-11-22 00:31:31,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:31:31,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-22 00:31:31,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:31,330 INFO L225 Difference]: With dead ends: 723 [2022-11-22 00:31:31,330 INFO L226 Difference]: Without dead ends: 459 [2022-11-22 00:31:31,335 INFO L412 NwaCegarLoop]: 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 [2022-11-22 00:31:31,346 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 81 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:31,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 210 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:31:31,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-11-22 00:31:31,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 457. [2022-11-22 00:31:31,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 1.5592105263157894) internal successors, (711), 456 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:31,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 711 transitions. [2022-11-22 00:31:31,404 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 711 transitions. Word has length 44 [2022-11-22 00:31:31,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:31,405 INFO L495 AbstractCegarLoop]: Abstraction has 457 states and 711 transitions. [2022-11-22 00:31:31,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:31,405 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 711 transitions. [2022-11-22 00:31:31,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-22 00:31:31,413 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:31,413 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:31:31,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 00:31:31,413 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:31,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:31,414 INFO L85 PathProgramCache]: Analyzing trace with hash -448509902, now seen corresponding path program 1 times [2022-11-22 00:31:31,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:31,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175620663] [2022-11-22 00:31:31,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:31,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:31,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:31,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:31:31,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:31,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175620663] [2022-11-22 00:31:31,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175620663] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:31,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:31,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:31:31,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127011858] [2022-11-22 00:31:31,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:31,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:31:31,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:31,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:31:31,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:31:31,548 INFO L87 Difference]: Start difference. First operand 457 states and 711 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:31,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:31,677 INFO L93 Difference]: Finished difference Result 1175 states and 1862 transitions. [2022-11-22 00:31:31,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:31:31,678 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-22 00:31:31,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:31,686 INFO L225 Difference]: With dead ends: 1175 [2022-11-22 00:31:31,687 INFO L226 Difference]: Without dead ends: 762 [2022-11-22 00:31:31,689 INFO L412 NwaCegarLoop]: 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 [2022-11-22 00:31:31,694 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 77 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:31,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 225 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:31:31,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-11-22 00:31:31,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 760. [2022-11-22 00:31:31,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 1.5691699604743083) internal successors, (1191), 759 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:31,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 1191 transitions. [2022-11-22 00:31:31,827 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 1191 transitions. Word has length 46 [2022-11-22 00:31:31,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:31,828 INFO L495 AbstractCegarLoop]: Abstraction has 760 states and 1191 transitions. [2022-11-22 00:31:31,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:31,829 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 1191 transitions. [2022-11-22 00:31:31,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-22 00:31:31,836 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:31,837 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:31:31,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 00:31:31,838 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:31,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:31,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1743853951, now seen corresponding path program 1 times [2022-11-22 00:31:31,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:31,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154326911] [2022-11-22 00:31:31,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:31,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:31,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:31,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:31:31,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:31,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154326911] [2022-11-22 00:31:31,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154326911] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:31,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:31,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:31:31,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845452980] [2022-11-22 00:31:31,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:31,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:31:31,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:31,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:31:31,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:31:31,977 INFO L87 Difference]: Start difference. First operand 760 states and 1191 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:32,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:32,149 INFO L93 Difference]: Finished difference Result 1902 states and 3012 transitions. [2022-11-22 00:31:32,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:31:32,150 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-22 00:31:32,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:32,157 INFO L225 Difference]: With dead ends: 1902 [2022-11-22 00:31:32,157 INFO L226 Difference]: Without dead ends: 1186 [2022-11-22 00:31:32,159 INFO L412 NwaCegarLoop]: 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 [2022-11-22 00:31:32,160 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 76 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:32,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 212 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:31:32,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2022-11-22 00:31:32,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 1184. [2022-11-22 00:31:32,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1183 states have (on average 1.5731191885038038) internal successors, (1861), 1183 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:32,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1861 transitions. [2022-11-22 00:31:32,334 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1861 transitions. Word has length 48 [2022-11-22 00:31:32,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:32,335 INFO L495 AbstractCegarLoop]: Abstraction has 1184 states and 1861 transitions. [2022-11-22 00:31:32,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:32,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1861 transitions. [2022-11-22 00:31:32,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-22 00:31:32,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:32,338 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:31:32,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 00:31:32,339 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:32,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:32,339 INFO L85 PathProgramCache]: Analyzing trace with hash -496972498, now seen corresponding path program 1 times [2022-11-22 00:31:32,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:32,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278984082] [2022-11-22 00:31:32,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:32,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:32,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:32,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:31:32,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:32,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278984082] [2022-11-22 00:31:32,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278984082] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:32,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:32,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 00:31:32,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416239282] [2022-11-22 00:31:32,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:32,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:31:32,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:32,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:31:32,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:31:32,501 INFO L87 Difference]: Start difference. First operand 1184 states and 1861 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:33,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:33,023 INFO L93 Difference]: Finished difference Result 3012 states and 4750 transitions. [2022-11-22 00:31:33,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 00:31:33,024 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-11-22 00:31:33,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:33,034 INFO L225 Difference]: With dead ends: 3012 [2022-11-22 00:31:33,034 INFO L226 Difference]: Without dead ends: 1885 [2022-11-22 00:31:33,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-22 00:31:33,037 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 463 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:33,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 816 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 00:31:33,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1885 states. [2022-11-22 00:31:33,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1885 to 1875. [2022-11-22 00:31:33,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1875 states, 1874 states have (on average 1.5618996798292422) internal successors, (2927), 1874 states have internal predecessors, (2927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:33,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1875 states to 1875 states and 2927 transitions. [2022-11-22 00:31:33,284 INFO L78 Accepts]: Start accepts. Automaton has 1875 states and 2927 transitions. Word has length 50 [2022-11-22 00:31:33,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:33,285 INFO L495 AbstractCegarLoop]: Abstraction has 1875 states and 2927 transitions. [2022-11-22 00:31:33,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:33,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1875 states and 2927 transitions. [2022-11-22 00:31:33,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-22 00:31:33,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:33,287 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:31:33,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 00:31:33,288 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:33,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:33,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1711217546, now seen corresponding path program 1 times [2022-11-22 00:31:33,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:33,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335245928] [2022-11-22 00:31:33,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:33,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:33,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:33,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:31:33,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:33,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335245928] [2022-11-22 00:31:33,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335245928] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:33,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:33,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:31:33,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472605888] [2022-11-22 00:31:33,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:33,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:31:33,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:33,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:31:33,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:31:33,429 INFO L87 Difference]: Start difference. First operand 1875 states and 2927 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:33,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:33,752 INFO L93 Difference]: Finished difference Result 3695 states and 5786 transitions. [2022-11-22 00:31:33,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:31:33,753 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-11-22 00:31:33,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:33,767 INFO L225 Difference]: With dead ends: 3695 [2022-11-22 00:31:33,767 INFO L226 Difference]: Without dead ends: 1877 [2022-11-22 00:31:33,770 INFO L412 NwaCegarLoop]: 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 [2022-11-22 00:31:33,772 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 153 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:33,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 302 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:31:33,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2022-11-22 00:31:34,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1875. [2022-11-22 00:31:34,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1875 states, 1874 states have (on average 1.555496264674493) internal successors, (2915), 1874 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:34,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1875 states to 1875 states and 2915 transitions. [2022-11-22 00:31:34,085 INFO L78 Accepts]: Start accepts. Automaton has 1875 states and 2915 transitions. Word has length 51 [2022-11-22 00:31:34,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:34,086 INFO L495 AbstractCegarLoop]: Abstraction has 1875 states and 2915 transitions. [2022-11-22 00:31:34,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:34,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1875 states and 2915 transitions. [2022-11-22 00:31:34,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-22 00:31:34,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:34,087 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:31:34,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 00:31:34,088 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:34,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:34,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1450190197, now seen corresponding path program 1 times [2022-11-22 00:31:34,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:34,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715245107] [2022-11-22 00:31:34,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:34,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:34,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:34,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:31:34,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:34,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715245107] [2022-11-22 00:31:34,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715245107] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:34,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:34,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:31:34,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822487745] [2022-11-22 00:31:34,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:34,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:31:34,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:34,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:31:34,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:31:34,199 INFO L87 Difference]: Start difference. First operand 1875 states and 2915 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:34,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:34,518 INFO L93 Difference]: Finished difference Result 3695 states and 5762 transitions. [2022-11-22 00:31:34,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:31:34,519 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-22 00:31:34,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:34,527 INFO L225 Difference]: With dead ends: 3695 [2022-11-22 00:31:34,527 INFO L226 Difference]: Without dead ends: 1877 [2022-11-22 00:31:34,533 INFO L412 NwaCegarLoop]: 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 [2022-11-22 00:31:34,535 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 161 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:34,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 308 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:31:34,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2022-11-22 00:31:34,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1875. [2022-11-22 00:31:34,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1875 states, 1874 states have (on average 1.5490928495197438) internal successors, (2903), 1874 states have internal predecessors, (2903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:34,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1875 states to 1875 states and 2903 transitions. [2022-11-22 00:31:34,759 INFO L78 Accepts]: Start accepts. Automaton has 1875 states and 2903 transitions. Word has length 52 [2022-11-22 00:31:34,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:34,759 INFO L495 AbstractCegarLoop]: Abstraction has 1875 states and 2903 transitions. [2022-11-22 00:31:34,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:34,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1875 states and 2903 transitions. [2022-11-22 00:31:34,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-22 00:31:34,760 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:34,760 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:31:34,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 00:31:34,761 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:34,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:34,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1952834993, now seen corresponding path program 1 times [2022-11-22 00:31:34,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:34,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531298704] [2022-11-22 00:31:34,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:34,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:34,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:34,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:31:34,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:34,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531298704] [2022-11-22 00:31:34,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531298704] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:34,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:34,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:31:34,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417170425] [2022-11-22 00:31:34,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:34,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:31:34,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:34,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:31:34,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:31:34,909 INFO L87 Difference]: Start difference. First operand 1875 states and 2903 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:35,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:35,223 INFO L93 Difference]: Finished difference Result 3695 states and 5738 transitions. [2022-11-22 00:31:35,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:31:35,224 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-11-22 00:31:35,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:35,233 INFO L225 Difference]: With dead ends: 3695 [2022-11-22 00:31:35,233 INFO L226 Difference]: Without dead ends: 1877 [2022-11-22 00:31:35,236 INFO L412 NwaCegarLoop]: 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 [2022-11-22 00:31:35,237 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 159 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:35,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 311 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:31:35,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2022-11-22 00:31:35,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1875. [2022-11-22 00:31:35,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1875 states, 1874 states have (on average 1.5426894343649946) internal successors, (2891), 1874 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:35,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1875 states to 1875 states and 2891 transitions. [2022-11-22 00:31:35,463 INFO L78 Accepts]: Start accepts. Automaton has 1875 states and 2891 transitions. Word has length 53 [2022-11-22 00:31:35,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:35,464 INFO L495 AbstractCegarLoop]: Abstraction has 1875 states and 2891 transitions. [2022-11-22 00:31:35,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:35,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1875 states and 2891 transitions. [2022-11-22 00:31:35,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-22 00:31:35,465 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:35,465 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:31:35,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-22 00:31:35,466 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:35,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:35,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1743591742, now seen corresponding path program 1 times [2022-11-22 00:31:35,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:35,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126543007] [2022-11-22 00:31:35,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:35,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:35,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:35,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:31:35,703 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:35,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126543007] [2022-11-22 00:31:35,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126543007] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:35,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:35,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 00:31:35,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491151717] [2022-11-22 00:31:35,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:35,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:31:35,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:35,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:31:35,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:31:35,706 INFO L87 Difference]: Start difference. First operand 1875 states and 2891 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:36,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:36,099 INFO L93 Difference]: Finished difference Result 3695 states and 5714 transitions. [2022-11-22 00:31:36,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:31:36,099 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-11-22 00:31:36,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:36,107 INFO L225 Difference]: With dead ends: 3695 [2022-11-22 00:31:36,107 INFO L226 Difference]: Without dead ends: 1877 [2022-11-22 00:31:36,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:31:36,110 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 185 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:36,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 297 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:31:36,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2022-11-22 00:31:36,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1875. [2022-11-22 00:31:36,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1875 states, 1874 states have (on average 1.538420490928495) internal successors, (2883), 1874 states have internal predecessors, (2883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:36,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1875 states to 1875 states and 2883 transitions. [2022-11-22 00:31:36,328 INFO L78 Accepts]: Start accepts. Automaton has 1875 states and 2883 transitions. Word has length 55 [2022-11-22 00:31:36,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:36,329 INFO L495 AbstractCegarLoop]: Abstraction has 1875 states and 2883 transitions. [2022-11-22 00:31:36,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:36,329 INFO L276 IsEmpty]: Start isEmpty. Operand 1875 states and 2883 transitions. [2022-11-22 00:31:36,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-22 00:31:36,329 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:36,330 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:31:36,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-22 00:31:36,330 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:36,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:36,331 INFO L85 PathProgramCache]: Analyzing trace with hash -2055668249, now seen corresponding path program 1 times [2022-11-22 00:31:36,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:36,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868571497] [2022-11-22 00:31:36,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:36,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:36,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:36,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:31:36,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:36,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868571497] [2022-11-22 00:31:36,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868571497] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:36,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:36,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 00:31:36,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366628885] [2022-11-22 00:31:36,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:36,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:31:36,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:36,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:31:36,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:31:36,541 INFO L87 Difference]: Start difference. First operand 1875 states and 2883 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:36,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:36,957 INFO L93 Difference]: Finished difference Result 4716 states and 7241 transitions. [2022-11-22 00:31:36,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:31:36,958 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-11-22 00:31:36,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:36,968 INFO L225 Difference]: With dead ends: 4716 [2022-11-22 00:31:36,968 INFO L226 Difference]: Without dead ends: 2898 [2022-11-22 00:31:36,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:31:36,972 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 244 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:36,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 316 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:31:37,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2898 states. [2022-11-22 00:31:37,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2898 to 2896. [2022-11-22 00:31:37,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2896 states, 2895 states have (on average 1.5246977547495681) internal successors, (4414), 2895 states have internal predecessors, (4414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:37,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2896 states to 2896 states and 4414 transitions. [2022-11-22 00:31:37,376 INFO L78 Accepts]: Start accepts. Automaton has 2896 states and 4414 transitions. Word has length 58 [2022-11-22 00:31:37,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:37,377 INFO L495 AbstractCegarLoop]: Abstraction has 2896 states and 4414 transitions. [2022-11-22 00:31:37,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:37,377 INFO L276 IsEmpty]: Start isEmpty. Operand 2896 states and 4414 transitions. [2022-11-22 00:31:37,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-22 00:31:37,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:37,378 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:31:37,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-22 00:31:37,379 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:37,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:37,379 INFO L85 PathProgramCache]: Analyzing trace with hash 709545590, now seen corresponding path program 1 times [2022-11-22 00:31:37,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:37,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121983095] [2022-11-22 00:31:37,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:37,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:37,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:37,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:31:37,722 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:37,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121983095] [2022-11-22 00:31:37,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121983095] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:37,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:37,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 00:31:37,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030791179] [2022-11-22 00:31:37,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:37,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 00:31:37,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:37,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 00:31:37,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:31:37,725 INFO L87 Difference]: Start difference. First operand 2896 states and 4414 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:38,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:38,509 INFO L93 Difference]: Finished difference Result 3555 states and 5390 transitions. [2022-11-22 00:31:38,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 00:31:38,510 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-11-22 00:31:38,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:38,524 INFO L225 Difference]: With dead ends: 3555 [2022-11-22 00:31:38,524 INFO L226 Difference]: Without dead ends: 3553 [2022-11-22 00:31:38,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-22 00:31:38,527 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 218 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:38,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 711 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:31:38,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3553 states. [2022-11-22 00:31:38,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3553 to 2902. [2022-11-22 00:31:38,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2902 states, 2901 states have (on average 1.5215442950706652) internal successors, (4414), 2901 states have internal predecessors, (4414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:38,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2902 states to 2902 states and 4414 transitions. [2022-11-22 00:31:38,934 INFO L78 Accepts]: Start accepts. Automaton has 2902 states and 4414 transitions. Word has length 59 [2022-11-22 00:31:38,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:38,935 INFO L495 AbstractCegarLoop]: Abstraction has 2902 states and 4414 transitions. [2022-11-22 00:31:38,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:38,935 INFO L276 IsEmpty]: Start isEmpty. Operand 2902 states and 4414 transitions. [2022-11-22 00:31:38,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-22 00:31:38,936 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:38,936 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:31:38,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-22 00:31:38,937 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:38,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:38,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1768604799, now seen corresponding path program 1 times [2022-11-22 00:31:38,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:38,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094475958] [2022-11-22 00:31:38,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:38,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:38,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:40,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:31:40,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:40,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094475958] [2022-11-22 00:31:40,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094475958] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:31:40,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752354190] [2022-11-22 00:31:40,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:40,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:31:40,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:31:40,674 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:31:40,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 00:31:40,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:40,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 00:31:40,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:31:41,524 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 00:31:41,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:31:41,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752354190] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:41,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:31:41,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 14 [2022-11-22 00:31:41,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039999028] [2022-11-22 00:31:41,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:41,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:31:41,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:41,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:31:41,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-11-22 00:31:41,527 INFO L87 Difference]: Start difference. First operand 2902 states and 4414 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:43,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:43,411 INFO L93 Difference]: Finished difference Result 8379 states and 12782 transitions. [2022-11-22 00:31:43,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:31:43,433 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-22 00:31:43,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:43,475 INFO L225 Difference]: With dead ends: 8379 [2022-11-22 00:31:43,476 INFO L226 Difference]: Without dead ends: 5519 [2022-11-22 00:31:43,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-11-22 00:31:43,481 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 428 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:43,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [428 Valid, 221 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:31:43,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5519 states. [2022-11-22 00:31:44,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5519 to 5517. [2022-11-22 00:31:44,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5517 states, 5516 states have (on average 1.5143219724438) internal successors, (8353), 5516 states have internal predecessors, (8353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:44,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5517 states to 5517 states and 8353 transitions. [2022-11-22 00:31:44,575 INFO L78 Accepts]: Start accepts. Automaton has 5517 states and 8353 transitions. Word has length 67 [2022-11-22 00:31:44,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:44,575 INFO L495 AbstractCegarLoop]: Abstraction has 5517 states and 8353 transitions. [2022-11-22 00:31:44,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:44,576 INFO L276 IsEmpty]: Start isEmpty. Operand 5517 states and 8353 transitions. [2022-11-22 00:31:44,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-22 00:31:44,577 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:44,577 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:31:44,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 00:31:44,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:31:44,785 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:44,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:44,786 INFO L85 PathProgramCache]: Analyzing trace with hash 318928394, now seen corresponding path program 1 times [2022-11-22 00:31:44,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:44,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360204029] [2022-11-22 00:31:44,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:44,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:44,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:44,936 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 00:31:44,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:44,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360204029] [2022-11-22 00:31:44,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360204029] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:44,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:44,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:31:44,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694446438] [2022-11-22 00:31:44,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:44,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:31:44,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:44,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:31:44,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:31:44,949 INFO L87 Difference]: Start difference. First operand 5517 states and 8353 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:46,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:46,202 INFO L93 Difference]: Finished difference Result 10998 states and 16667 transitions. [2022-11-22 00:31:46,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:31:46,203 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-11-22 00:31:46,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:46,215 INFO L225 Difference]: With dead ends: 10998 [2022-11-22 00:31:46,215 INFO L226 Difference]: Without dead ends: 5517 [2022-11-22 00:31:46,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:31:46,223 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 296 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:46,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 103 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:31:46,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5517 states. [2022-11-22 00:31:47,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5517 to 5517. [2022-11-22 00:31:47,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5517 states, 5516 states have (on average 1.4807831762146484) internal successors, (8168), 5516 states have internal predecessors, (8168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:47,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5517 states to 5517 states and 8168 transitions. [2022-11-22 00:31:47,329 INFO L78 Accepts]: Start accepts. Automaton has 5517 states and 8168 transitions. Word has length 70 [2022-11-22 00:31:47,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:47,329 INFO L495 AbstractCegarLoop]: Abstraction has 5517 states and 8168 transitions. [2022-11-22 00:31:47,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:47,330 INFO L276 IsEmpty]: Start isEmpty. Operand 5517 states and 8168 transitions. [2022-11-22 00:31:47,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-22 00:31:47,331 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:47,331 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:31:47,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-22 00:31:47,331 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:47,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:47,332 INFO L85 PathProgramCache]: Analyzing trace with hash -184116433, now seen corresponding path program 1 times [2022-11-22 00:31:47,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:47,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987366928] [2022-11-22 00:31:47,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:47,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:47,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:48,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:31:48,449 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:48,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987366928] [2022-11-22 00:31:48,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987366928] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:31:48,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437272049] [2022-11-22 00:31:48,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:48,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:31:48,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:31:48,451 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:31:48,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 00:31:48,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:48,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 00:31:48,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:31:49,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 00:31:49,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:31:49,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437272049] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:49,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:31:49,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 13 [2022-11-22 00:31:49,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312714251] [2022-11-22 00:31:49,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:49,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:31:49,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:49,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:31:49,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-22 00:31:49,078 INFO L87 Difference]: Start difference. First operand 5517 states and 8168 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:51,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:51,661 INFO L93 Difference]: Finished difference Result 16047 states and 23786 transitions. [2022-11-22 00:31:51,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:31:51,663 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-11-22 00:31:51,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:51,691 INFO L225 Difference]: With dead ends: 16047 [2022-11-22 00:31:51,691 INFO L226 Difference]: Without dead ends: 10599 [2022-11-22 00:31:51,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-11-22 00:31:51,699 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 374 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:51,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 234 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:31:51,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10599 states. [2022-11-22 00:31:53,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10599 to 10597. [2022-11-22 00:31:53,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10597 states, 10596 states have (on average 1.4730086825217064) internal successors, (15608), 10596 states have internal predecessors, (15608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:53,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10597 states to 10597 states and 15608 transitions. [2022-11-22 00:31:53,582 INFO L78 Accepts]: Start accepts. Automaton has 10597 states and 15608 transitions. Word has length 70 [2022-11-22 00:31:53,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:53,582 INFO L495 AbstractCegarLoop]: Abstraction has 10597 states and 15608 transitions. [2022-11-22 00:31:53,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:53,583 INFO L276 IsEmpty]: Start isEmpty. Operand 10597 states and 15608 transitions. [2022-11-22 00:31:53,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-22 00:31:53,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:53,585 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:31:53,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 00:31:53,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-22 00:31:53,791 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:53,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:53,792 INFO L85 PathProgramCache]: Analyzing trace with hash 886657518, now seen corresponding path program 1 times [2022-11-22 00:31:53,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:53,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61858874] [2022-11-22 00:31:53,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:53,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:53,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:53,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 00:31:53,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:53,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61858874] [2022-11-22 00:31:53,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61858874] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:53,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:53,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:31:53,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620179509] [2022-11-22 00:31:53,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:53,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:31:53,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:53,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:31:53,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:31:53,966 INFO L87 Difference]: Start difference. First operand 10597 states and 15608 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:56,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:56,203 INFO L93 Difference]: Finished difference Result 21137 states and 31149 transitions. [2022-11-22 00:31:56,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:31:56,204 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-11-22 00:31:56,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:56,230 INFO L225 Difference]: With dead ends: 21137 [2022-11-22 00:31:56,230 INFO L226 Difference]: Without dead ends: 10597 [2022-11-22 00:31:56,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:31:56,243 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 280 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:56,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 105 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:31:56,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10597 states. [2022-11-22 00:31:58,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10597 to 10597. [2022-11-22 00:31:58,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10597 states, 10596 states have (on average 1.446583616459041) internal successors, (15328), 10596 states have internal predecessors, (15328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:58,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10597 states to 10597 states and 15328 transitions. [2022-11-22 00:31:58,282 INFO L78 Accepts]: Start accepts. Automaton has 10597 states and 15328 transitions. Word has length 73 [2022-11-22 00:31:58,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:58,282 INFO L495 AbstractCegarLoop]: Abstraction has 10597 states and 15328 transitions. [2022-11-22 00:31:58,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:58,283 INFO L276 IsEmpty]: Start isEmpty. Operand 10597 states and 15328 transitions. [2022-11-22 00:31:58,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-22 00:31:58,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:58,285 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:31:58,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-22 00:31:58,285 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:58,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:58,286 INFO L85 PathProgramCache]: Analyzing trace with hash 530696617, now seen corresponding path program 1 times [2022-11-22 00:31:58,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:58,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296314983] [2022-11-22 00:31:58,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:58,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:58,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:59,618 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:31:59,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:59,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296314983] [2022-11-22 00:31:59,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296314983] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:31:59,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276197422] [2022-11-22 00:31:59,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:59,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:31:59,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:31:59,621 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:31:59,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 00:31:59,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:59,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 00:31:59,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:32:00,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 00:32:00,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:32:00,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276197422] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:32:00,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:32:00,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 13 [2022-11-22 00:32:00,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285854094] [2022-11-22 00:32:00,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:32:00,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:32:00,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:32:00,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:32:00,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-22 00:32:00,432 INFO L87 Difference]: Start difference. First operand 10597 states and 15328 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:32:04,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:32:04,368 INFO L93 Difference]: Finished difference Result 31057 states and 44938 transitions. [2022-11-22 00:32:04,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:32:04,368 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-11-22 00:32:04,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:32:04,413 INFO L225 Difference]: With dead ends: 31057 [2022-11-22 00:32:04,413 INFO L226 Difference]: Without dead ends: 20539 [2022-11-22 00:32:04,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-11-22 00:32:04,430 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 246 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:32:04,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 289 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:32:04,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20539 states. [2022-11-22 00:32:09,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20539 to 20537. [2022-11-22 00:32:09,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20537 states, 20536 states have (on average 1.4392286716010907) internal successors, (29556), 20536 states have internal predecessors, (29556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:32:09,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20537 states to 20537 states and 29556 transitions. [2022-11-22 00:32:09,316 INFO L78 Accepts]: Start accepts. Automaton has 20537 states and 29556 transitions. Word has length 73 [2022-11-22 00:32:09,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:32:09,316 INFO L495 AbstractCegarLoop]: Abstraction has 20537 states and 29556 transitions. [2022-11-22 00:32:09,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:32:09,317 INFO L276 IsEmpty]: Start isEmpty. Operand 20537 states and 29556 transitions. [2022-11-22 00:32:09,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-22 00:32:09,319 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:32:09,319 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:32:09,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-22 00:32:09,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-22 00:32:09,525 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:32:09,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:32:09,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1012531897, now seen corresponding path program 1 times [2022-11-22 00:32:09,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:32:09,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597668898] [2022-11-22 00:32:09,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:32:09,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:32:09,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:32:11,232 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:32:11,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:32:11,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597668898] [2022-11-22 00:32:11,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597668898] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:32:11,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210430175] [2022-11-22 00:32:11,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:32:11,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:32:11,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:32:11,239 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:32:11,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 00:32:11,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:32:11,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-22 00:32:11,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:32:12,125 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 00:32:12,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:32:12,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210430175] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:32:12,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:32:12,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 17 [2022-11-22 00:32:12,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878440765] [2022-11-22 00:32:12,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:32:12,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 00:32:12,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:32:12,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 00:32:12,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-11-22 00:32:12,128 INFO L87 Difference]: Start difference. First operand 20537 states and 29556 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 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) [2022-11-22 00:32:18,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:32:18,544 INFO L93 Difference]: Finished difference Result 39711 states and 56806 transitions. [2022-11-22 00:32:18,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 00:32:18,545 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-22 00:32:18,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:32:18,613 INFO L225 Difference]: With dead ends: 39711 [2022-11-22 00:32:18,613 INFO L226 Difference]: Without dead ends: 28993 [2022-11-22 00:32:18,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-11-22 00:32:18,631 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 546 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:32:18,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [546 Valid, 290 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:32:18,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28993 states. [2022-11-22 00:32:23,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28993 to 20559. [2022-11-22 00:32:23,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20559 states, 20558 states have (on average 1.4390018484288354) internal successors, (29583), 20558 states have internal predecessors, (29583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:32:23,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20559 states to 20559 states and 29583 transitions. [2022-11-22 00:32:23,135 INFO L78 Accepts]: Start accepts. Automaton has 20559 states and 29583 transitions. Word has length 76 [2022-11-22 00:32:23,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:32:23,135 INFO L495 AbstractCegarLoop]: Abstraction has 20559 states and 29583 transitions. [2022-11-22 00:32:23,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 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) [2022-11-22 00:32:23,136 INFO L276 IsEmpty]: Start isEmpty. Operand 20559 states and 29583 transitions. [2022-11-22 00:32:23,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-22 00:32:23,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:32:23,138 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:32:23,150 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-22 00:32:23,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:32:23,344 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:32:23,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:32:23,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1639058183, now seen corresponding path program 1 times [2022-11-22 00:32:23,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:32:23,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631576809] [2022-11-22 00:32:23,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:32:23,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:32:23,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:32:24,342 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:32:24,342 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:32:24,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631576809] [2022-11-22 00:32:24,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631576809] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:32:24,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844968836] [2022-11-22 00:32:24,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:32:24,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:32:24,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:32:24,347 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:32:24,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 00:32:24,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:32:24,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-22 00:32:24,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:32:25,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 00:32:25,287 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:32:25,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844968836] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:32:25,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:32:25,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2022-11-22 00:32:25,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391824040] [2022-11-22 00:32:25,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:32:25,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 00:32:25,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:32:25,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 00:32:25,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-11-22 00:32:25,292 INFO L87 Difference]: Start difference. First operand 20559 states and 29583 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 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) [2022-11-22 00:32:33,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:32:33,387 INFO L93 Difference]: Finished difference Result 48663 states and 69901 transitions. [2022-11-22 00:32:33,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 00:32:33,388 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-22 00:32:33,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:32:33,473 INFO L225 Difference]: With dead ends: 48663 [2022-11-22 00:32:33,474 INFO L226 Difference]: Without dead ends: 38145 [2022-11-22 00:32:33,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-22 00:32:33,489 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 446 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:32:33,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [446 Valid, 344 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:32:33,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38145 states. [2022-11-22 00:32:39,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38145 to 30525. [2022-11-22 00:32:39,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30525 states, 30524 states have (on average 1.426942733586686) internal successors, (43556), 30524 states have internal predecessors, (43556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:32:39,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30525 states to 30525 states and 43556 transitions. [2022-11-22 00:32:39,945 INFO L78 Accepts]: Start accepts. Automaton has 30525 states and 43556 transitions. Word has length 76 [2022-11-22 00:32:39,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:32:39,945 INFO L495 AbstractCegarLoop]: Abstraction has 30525 states and 43556 transitions. [2022-11-22 00:32:39,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 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) [2022-11-22 00:32:39,945 INFO L276 IsEmpty]: Start isEmpty. Operand 30525 states and 43556 transitions. [2022-11-22 00:32:39,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-22 00:32:39,947 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:32:39,947 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:32:39,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 00:32:40,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:32:40,155 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:32:40,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:32:40,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1006096199, now seen corresponding path program 1 times [2022-11-22 00:32:40,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:32:40,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218815167] [2022-11-22 00:32:40,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:32:40,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:32:40,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:32:41,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:32:41,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:32:41,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218815167] [2022-11-22 00:32:41,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218815167] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:32:41,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178045514] [2022-11-22 00:32:41,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:32:41,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:32:41,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:32:41,160 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:32:41,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d584c60-614f-41c0-84b4-5aac3eb6dfc1/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 00:32:41,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:32:41,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-22 00:32:41,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:32:42,322 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:32:42,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:32:48,381 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:32:48,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178045514] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:32:48,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1516014399] [2022-11-22 00:32:48,412 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-22 00:32:48,412 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:32:48,415 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:32:48,420 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:32:48,421 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:32:48,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:32:48,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:32:48,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-22 00:32:48,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:48,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:48,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:48,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-22 00:32:49,018 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-22 00:32:58,945 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6