./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label07.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label07.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh --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 a8eb1c549e735c3cffa39c2cb57907d032185b5da86f8481f430bf75e1d2a903 --- 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-2329fc7 [2022-12-14 07:32:27,536 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 07:32:27,538 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 07:32:27,557 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 07:32:27,557 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 07:32:27,558 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 07:32:27,559 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 07:32:27,561 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 07:32:27,562 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 07:32:27,563 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 07:32:27,564 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 07:32:27,565 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 07:32:27,566 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 07:32:27,567 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 07:32:27,568 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 07:32:27,569 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 07:32:27,569 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 07:32:27,570 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 07:32:27,572 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 07:32:27,574 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 07:32:27,575 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 07:32:27,576 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 07:32:27,577 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 07:32:27,578 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 07:32:27,582 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 07:32:27,582 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 07:32:27,583 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 07:32:27,583 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 07:32:27,584 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 07:32:27,585 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 07:32:27,585 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 07:32:27,586 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 07:32:27,586 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 07:32:27,587 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 07:32:27,588 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 07:32:27,588 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 07:32:27,589 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 07:32:27,589 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 07:32:27,589 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 07:32:27,590 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 07:32:27,591 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 07:32:27,592 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 07:32:27,613 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 07:32:27,613 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 07:32:27,613 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 07:32:27,614 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 07:32:27,614 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 07:32:27,614 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 07:32:27,615 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 07:32:27,615 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 07:32:27,615 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 07:32:27,615 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 07:32:27,615 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 07:32:27,616 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 07:32:27,616 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 07:32:27,616 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 07:32:27,616 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 07:32:27,616 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 07:32:27,617 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 07:32:27,617 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 07:32:27,617 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 07:32:27,618 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 07:32:27,618 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 07:32:27,618 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 07:32:27,618 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 07:32:27,618 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 07:32:27,619 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 07:32:27,619 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 07:32:27,619 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 07:32:27,619 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 07:32:27,619 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 07:32:27,620 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 07:32:27,620 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 07:32:27,620 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 07:32:27,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:32:27,620 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 07:32:27,621 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 07:32:27,621 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 07:32:27,621 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 07:32:27,621 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 07:32:27,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 07:32:27,621 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 07:32:27,622 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 07:32:27,622 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_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8eb1c549e735c3cffa39c2cb57907d032185b5da86f8481f430bf75e1d2a903 [2022-12-14 07:32:27,826 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:32:27,844 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:32:27,846 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:32:27,847 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:32:27,847 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:32:27,848 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/eca-rers2012/Problem03_label07.c [2022-12-14 07:32:30,485 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:32:30,747 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:32:30,747 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/sv-benchmarks/c/eca-rers2012/Problem03_label07.c [2022-12-14 07:32:30,757 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/data/3b0d34284/5a6464f5cb3b47e986e98d6c68364d26/FLAGaa71d0bd6 [2022-12-14 07:32:30,769 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/data/3b0d34284/5a6464f5cb3b47e986e98d6c68364d26 [2022-12-14 07:32:30,771 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:32:30,773 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:32:30,774 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:32:30,774 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:32:30,777 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:32:30,778 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:32:30" (1/1) ... [2022-12-14 07:32:30,779 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dd8449 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:32:30, skipping insertion in model container [2022-12-14 07:32:30,779 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:32:30" (1/1) ... [2022-12-14 07:32:30,785 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:32:30,832 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:32:31,267 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_7262ed7e-5722-4818-8bd0-fbfa200f947c/sv-benchmarks/c/eca-rers2012/Problem03_label07.c[57439,57452] [2022-12-14 07:32:31,297 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:32:31,306 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 07:32:31,538 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_7262ed7e-5722-4818-8bd0-fbfa200f947c/sv-benchmarks/c/eca-rers2012/Problem03_label07.c[57439,57452] [2022-12-14 07:32:31,548 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:32:31,560 INFO L208 MainTranslator]: Completed translation [2022-12-14 07:32:31,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:32:31 WrapperNode [2022-12-14 07:32:31,560 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:32:31,561 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 07:32:31,561 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 07:32:31,561 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 07:32:31,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:32:31" (1/1) ... [2022-12-14 07:32:31,593 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:32:31" (1/1) ... [2022-12-14 07:32:31,658 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-12-14 07:32:31,658 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 07:32:31,659 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 07:32:31,659 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 07:32:31,659 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 07:32:31,666 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:32:31" (1/1) ... [2022-12-14 07:32:31,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:32:31" (1/1) ... [2022-12-14 07:32:31,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:32:31" (1/1) ... [2022-12-14 07:32:31,671 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:32:31" (1/1) ... [2022-12-14 07:32:31,704 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:32:31" (1/1) ... [2022-12-14 07:32:31,712 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:32:31" (1/1) ... [2022-12-14 07:32:31,725 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:32:31" (1/1) ... [2022-12-14 07:32:31,729 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:32:31" (1/1) ... [2022-12-14 07:32:31,738 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 07:32:31,739 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 07:32:31,739 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 07:32:31,739 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 07:32:31,740 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:32:31" (1/1) ... [2022-12-14 07:32:31,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:32:31,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:32:31,763 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 07:32:31,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 07:32:31,796 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 07:32:31,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 07:32:31,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 07:32:31,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 07:32:31,873 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 07:32:31,875 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 07:32:33,207 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 07:32:33,498 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 07:32:33,498 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 07:32:33,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:32:33 BoogieIcfgContainer [2022-12-14 07:32:33,500 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 07:32:33,502 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 07:32:33,502 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 07:32:33,504 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 07:32:33,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:32:30" (1/3) ... [2022-12-14 07:32:33,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72cf5ef9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:32:33, skipping insertion in model container [2022-12-14 07:32:33,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:32:31" (2/3) ... [2022-12-14 07:32:33,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72cf5ef9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:32:33, skipping insertion in model container [2022-12-14 07:32:33,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:32:33" (3/3) ... [2022-12-14 07:32:33,506 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label07.c [2022-12-14 07:32:33,519 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 07:32:33,519 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 07:32:33,555 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:32:33,560 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;@7ef8037e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:32:33,561 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 07:32:33,565 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:33,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-14 07:32:33,575 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:32:33,575 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:32:33,576 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:32:33,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:32:33,580 INFO L85 PathProgramCache]: Analyzing trace with hash 209344183, now seen corresponding path program 1 times [2022-12-14 07:32:33,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:32:33,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012391645] [2022-12-14 07:32:33,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:32:33,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:32:33,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:32:34,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:32:34,201 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:32:34,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012391645] [2022-12-14 07:32:34,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012391645] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:32:34,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:32:34,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:32:34,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778479381] [2022-12-14 07:32:34,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:32:34,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:32:34,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:32:34,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:32:34,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:32:34,234 INFO L87 Difference]: Start difference. First operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 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 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:34,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:32:34,836 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2022-12-14 07:32:34,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:32:34,838 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 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 143 [2022-12-14 07:32:34,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:32:34,848 INFO L225 Difference]: With dead ends: 440 [2022-12-14 07:32:34,848 INFO L226 Difference]: Without dead ends: 289 [2022-12-14 07:32:34,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:32:34,852 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 15 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:32:34,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 57 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 07:32:34,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-12-14 07:32:34,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2022-12-14 07:32:34,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.9270833333333333) internal successors, (555), 288 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:34,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 555 transitions. [2022-12-14 07:32:34,890 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 555 transitions. Word has length 143 [2022-12-14 07:32:34,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:32:34,891 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 555 transitions. [2022-12-14 07:32:34,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:34,891 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 555 transitions. [2022-12-14 07:32:34,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-12-14 07:32:34,893 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:32:34,893 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:32:34,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 07:32:34,893 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:32:34,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:32:34,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1305709099, now seen corresponding path program 1 times [2022-12-14 07:32:34,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:32:34,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166171385] [2022-12-14 07:32:34,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:32:34,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:32:34,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:32:35,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:32:35,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:32:35,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166171385] [2022-12-14 07:32:35,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166171385] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:32:35,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:32:35,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:32:35,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857461692] [2022-12-14 07:32:35,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:32:35,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:32:35,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:32:35,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:32:35,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:32:35,235 INFO L87 Difference]: Start difference. First operand 289 states and 555 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:35,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:32:35,743 INFO L93 Difference]: Finished difference Result 865 states and 1663 transitions. [2022-12-14 07:32:35,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:32:35,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2022-12-14 07:32:35,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:32:35,746 INFO L225 Difference]: With dead ends: 865 [2022-12-14 07:32:35,747 INFO L226 Difference]: Without dead ends: 577 [2022-12-14 07:32:35,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:32:35,749 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 180 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:32:35,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 16 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 07:32:35,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-12-14 07:32:35,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 575. [2022-12-14 07:32:35,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.8954703832752613) internal successors, (1088), 574 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:35,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1088 transitions. [2022-12-14 07:32:35,779 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1088 transitions. Word has length 147 [2022-12-14 07:32:35,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:32:35,780 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 1088 transitions. [2022-12-14 07:32:35,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:35,780 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1088 transitions. [2022-12-14 07:32:35,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-12-14 07:32:35,782 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:32:35,783 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:32:35,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 07:32:35,783 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:32:35,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:32:35,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1322620065, now seen corresponding path program 1 times [2022-12-14 07:32:35,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:32:35,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213113249] [2022-12-14 07:32:35,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:32:35,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:32:35,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:32:35,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:32:35,975 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:32:35,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213113249] [2022-12-14 07:32:35,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213113249] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:32:35,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:32:35,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:32:35,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982309441] [2022-12-14 07:32:35,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:32:35,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:32:35,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:32:35,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:32:35,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:32:35,978 INFO L87 Difference]: Start difference. First operand 575 states and 1088 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:36,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:32:36,564 INFO L93 Difference]: Finished difference Result 1723 states and 3262 transitions. [2022-12-14 07:32:36,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:32:36,565 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 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 148 [2022-12-14 07:32:36,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:32:36,572 INFO L225 Difference]: With dead ends: 1723 [2022-12-14 07:32:36,573 INFO L226 Difference]: Without dead ends: 1149 [2022-12-14 07:32:36,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:32:36,576 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 166 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:32:36,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 59 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 07:32:36,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2022-12-14 07:32:36,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 861. [2022-12-14 07:32:36,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 860 states have (on average 1.791860465116279) internal successors, (1541), 860 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:36,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 1541 transitions. [2022-12-14 07:32:36,602 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 1541 transitions. Word has length 148 [2022-12-14 07:32:36,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:32:36,603 INFO L495 AbstractCegarLoop]: Abstraction has 861 states and 1541 transitions. [2022-12-14 07:32:36,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:36,603 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 1541 transitions. [2022-12-14 07:32:36,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-12-14 07:32:36,607 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:32:36,607 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:32:36,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 07:32:36,607 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:32:36,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:32:36,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1094384470, now seen corresponding path program 1 times [2022-12-14 07:32:36,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:32:36,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088327064] [2022-12-14 07:32:36,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:32:36,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:32:36,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:32:36,701 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:32:36,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:32:36,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088327064] [2022-12-14 07:32:36,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088327064] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:32:36,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:32:36,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:32:36,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358113323] [2022-12-14 07:32:36,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:32:36,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:32:36,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:32:36,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:32:36,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:32:36,704 INFO L87 Difference]: Start difference. First operand 861 states and 1541 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:37,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:32:37,323 INFO L93 Difference]: Finished difference Result 2579 states and 4620 transitions. [2022-12-14 07:32:37,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:32:37,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 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 151 [2022-12-14 07:32:37,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:32:37,336 INFO L225 Difference]: With dead ends: 2579 [2022-12-14 07:32:37,336 INFO L226 Difference]: Without dead ends: 1719 [2022-12-14 07:32:37,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:32:37,340 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 159 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:32:37,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 23 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 07:32:37,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2022-12-14 07:32:37,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1719. [2022-12-14 07:32:37,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.749708963911525) internal successors, (3006), 1718 states have internal predecessors, (3006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:37,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 3006 transitions. [2022-12-14 07:32:37,388 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 3006 transitions. Word has length 151 [2022-12-14 07:32:37,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:32:37,388 INFO L495 AbstractCegarLoop]: Abstraction has 1719 states and 3006 transitions. [2022-12-14 07:32:37,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:37,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 3006 transitions. [2022-12-14 07:32:37,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-12-14 07:32:37,393 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:32:37,394 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:32:37,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 07:32:37,394 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:32:37,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:32:37,395 INFO L85 PathProgramCache]: Analyzing trace with hash 14512337, now seen corresponding path program 1 times [2022-12-14 07:32:37,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:32:37,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236984874] [2022-12-14 07:32:37,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:32:37,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:32:37,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:32:37,690 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:32:37,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:32:37,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236984874] [2022-12-14 07:32:37,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236984874] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:32:37,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:32:37,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:32:37,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004440114] [2022-12-14 07:32:37,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:32:37,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:32:37,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:32:37,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:32:37,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:32:37,692 INFO L87 Difference]: Start difference. First operand 1719 states and 3006 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:38,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:32:38,336 INFO L93 Difference]: Finished difference Result 4295 states and 7476 transitions. [2022-12-14 07:32:38,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:32:38,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 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 153 [2022-12-14 07:32:38,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:32:38,343 INFO L225 Difference]: With dead ends: 4295 [2022-12-14 07:32:38,343 INFO L226 Difference]: Without dead ends: 2577 [2022-12-14 07:32:38,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:32:38,345 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 157 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:32:38,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 34 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 07:32:38,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2577 states. [2022-12-14 07:32:38,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2577 to 2577. [2022-12-14 07:32:38,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2577 states, 2576 states have (on average 1.6975931677018634) internal successors, (4373), 2576 states have internal predecessors, (4373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:38,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2577 states to 2577 states and 4373 transitions. [2022-12-14 07:32:38,402 INFO L78 Accepts]: Start accepts. Automaton has 2577 states and 4373 transitions. Word has length 153 [2022-12-14 07:32:38,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:32:38,402 INFO L495 AbstractCegarLoop]: Abstraction has 2577 states and 4373 transitions. [2022-12-14 07:32:38,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:38,403 INFO L276 IsEmpty]: Start isEmpty. Operand 2577 states and 4373 transitions. [2022-12-14 07:32:38,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-12-14 07:32:38,407 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:32:38,408 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:32:38,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 07:32:38,408 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:32:38,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:32:38,408 INFO L85 PathProgramCache]: Analyzing trace with hash -316854053, now seen corresponding path program 1 times [2022-12-14 07:32:38,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:32:38,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745579297] [2022-12-14 07:32:38,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:32:38,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:32:38,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:32:38,531 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:32:38,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:32:38,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745579297] [2022-12-14 07:32:38,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745579297] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:32:38,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:32:38,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:32:38,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008578988] [2022-12-14 07:32:38,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:32:38,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:32:38,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:32:38,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:32:38,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:32:38,534 INFO L87 Difference]: Start difference. First operand 2577 states and 4373 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:39,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:32:39,183 INFO L93 Difference]: Finished difference Result 6726 states and 11565 transitions. [2022-12-14 07:32:39,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:32:39,184 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 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 158 [2022-12-14 07:32:39,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:32:39,192 INFO L225 Difference]: With dead ends: 6726 [2022-12-14 07:32:39,192 INFO L226 Difference]: Without dead ends: 4150 [2022-12-14 07:32:39,194 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 [2022-12-14 07:32:39,195 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 34 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:32:39,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 232 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 07:32:39,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4150 states. [2022-12-14 07:32:39,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4150 to 3721. [2022-12-14 07:32:39,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3721 states, 3720 states have (on average 1.647043010752688) internal successors, (6127), 3720 states have internal predecessors, (6127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:39,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3721 states to 3721 states and 6127 transitions. [2022-12-14 07:32:39,259 INFO L78 Accepts]: Start accepts. Automaton has 3721 states and 6127 transitions. Word has length 158 [2022-12-14 07:32:39,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:32:39,260 INFO L495 AbstractCegarLoop]: Abstraction has 3721 states and 6127 transitions. [2022-12-14 07:32:39,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:39,260 INFO L276 IsEmpty]: Start isEmpty. Operand 3721 states and 6127 transitions. [2022-12-14 07:32:39,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-12-14 07:32:39,263 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:32:39,263 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:32:39,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 07:32:39,264 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:32:39,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:32:39,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1023957270, now seen corresponding path program 1 times [2022-12-14 07:32:39,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:32:39,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955439049] [2022-12-14 07:32:39,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:32:39,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:32:39,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:32:39,481 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:32:39,482 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:32:39,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955439049] [2022-12-14 07:32:39,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955439049] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:32:39,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:32:39,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:32:39,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516905409] [2022-12-14 07:32:39,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:32:39,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:32:39,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:32:39,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:32:39,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:32:39,484 INFO L87 Difference]: Start difference. First operand 3721 states and 6127 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:40,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:32:40,125 INFO L93 Difference]: Finished difference Result 10015 states and 16429 transitions. [2022-12-14 07:32:40,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:32:40,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 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 160 [2022-12-14 07:32:40,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:32:40,138 INFO L225 Difference]: With dead ends: 10015 [2022-12-14 07:32:40,138 INFO L226 Difference]: Without dead ends: 6295 [2022-12-14 07:32:40,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:32:40,143 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 141 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:32:40,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 108 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 07:32:40,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6295 states. [2022-12-14 07:32:40,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6295 to 5580. [2022-12-14 07:32:40,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5580 states, 5579 states have (on average 1.4769671984226564) internal successors, (8240), 5579 states have internal predecessors, (8240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:40,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5580 states to 5580 states and 8240 transitions. [2022-12-14 07:32:40,241 INFO L78 Accepts]: Start accepts. Automaton has 5580 states and 8240 transitions. Word has length 160 [2022-12-14 07:32:40,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:32:40,242 INFO L495 AbstractCegarLoop]: Abstraction has 5580 states and 8240 transitions. [2022-12-14 07:32:40,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:40,242 INFO L276 IsEmpty]: Start isEmpty. Operand 5580 states and 8240 transitions. [2022-12-14 07:32:40,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-12-14 07:32:40,248 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:32:40,248 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:32:40,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 07:32:40,249 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:32:40,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:32:40,249 INFO L85 PathProgramCache]: Analyzing trace with hash 393907824, now seen corresponding path program 1 times [2022-12-14 07:32:40,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:32:40,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278007993] [2022-12-14 07:32:40,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:32:40,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:32:40,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:32:40,426 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:32:40,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:32:40,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278007993] [2022-12-14 07:32:40,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278007993] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:32:40,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:32:40,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:32:40,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330913390] [2022-12-14 07:32:40,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:32:40,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:32:40,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:32:40,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:32:40,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:32:40,429 INFO L87 Difference]: Start difference. First operand 5580 states and 8240 transitions. Second operand has 4 states, 4 states have (on average 41.25) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:41,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:32:41,361 INFO L93 Difference]: Finished difference Result 21316 states and 31527 transitions. [2022-12-14 07:32:41,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:32:41,362 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 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 170 [2022-12-14 07:32:41,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:32:41,398 INFO L225 Difference]: With dead ends: 21316 [2022-12-14 07:32:41,399 INFO L226 Difference]: Without dead ends: 15737 [2022-12-14 07:32:41,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:32:41,407 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 402 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 07:32:41,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 21 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 07:32:41,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15737 states. [2022-12-14 07:32:41,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15737 to 15733. [2022-12-14 07:32:41,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15733 states, 15732 states have (on average 1.4499745741164505) internal successors, (22811), 15732 states have internal predecessors, (22811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:41,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15733 states to 15733 states and 22811 transitions. [2022-12-14 07:32:41,662 INFO L78 Accepts]: Start accepts. Automaton has 15733 states and 22811 transitions. Word has length 170 [2022-12-14 07:32:41,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:32:41,662 INFO L495 AbstractCegarLoop]: Abstraction has 15733 states and 22811 transitions. [2022-12-14 07:32:41,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:41,663 INFO L276 IsEmpty]: Start isEmpty. Operand 15733 states and 22811 transitions. [2022-12-14 07:32:41,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-12-14 07:32:41,674 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:32:41,675 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:32:41,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 07:32:41,675 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:32:41,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:32:41,676 INFO L85 PathProgramCache]: Analyzing trace with hash 2044154603, now seen corresponding path program 1 times [2022-12-14 07:32:41,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:32:41,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509650370] [2022-12-14 07:32:41,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:32:41,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:32:41,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:32:41,809 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:32:41,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:32:41,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509650370] [2022-12-14 07:32:41,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509650370] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:32:41,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:32:41,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:32:41,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425102141] [2022-12-14 07:32:41,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:32:41,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:32:41,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:32:41,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:32:41,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:32:41,811 INFO L87 Difference]: Start difference. First operand 15733 states and 22811 transitions. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:42,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:32:42,218 INFO L93 Difference]: Finished difference Result 46911 states and 67932 transitions. [2022-12-14 07:32:42,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:32:42,218 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 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 172 [2022-12-14 07:32:42,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:32:42,257 INFO L225 Difference]: With dead ends: 46911 [2022-12-14 07:32:42,257 INFO L226 Difference]: Without dead ends: 31179 [2022-12-14 07:32:42,268 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 [2022-12-14 07:32:42,268 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 244 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:32:42,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 313 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:32:42,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31179 states. [2022-12-14 07:32:42,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31179 to 31177. [2022-12-14 07:32:42,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31177 states, 31176 states have (on average 1.4438350012830383) internal successors, (45013), 31176 states have internal predecessors, (45013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:42,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31177 states to 31177 states and 45013 transitions. [2022-12-14 07:32:42,684 INFO L78 Accepts]: Start accepts. Automaton has 31177 states and 45013 transitions. Word has length 172 [2022-12-14 07:32:42,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:32:42,684 INFO L495 AbstractCegarLoop]: Abstraction has 31177 states and 45013 transitions. [2022-12-14 07:32:42,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:42,684 INFO L276 IsEmpty]: Start isEmpty. Operand 31177 states and 45013 transitions. [2022-12-14 07:32:42,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-12-14 07:32:42,689 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:32:42,689 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:32:42,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 07:32:42,690 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:32:42,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:32:42,690 INFO L85 PathProgramCache]: Analyzing trace with hash 789005572, now seen corresponding path program 1 times [2022-12-14 07:32:42,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:32:42,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574696771] [2022-12-14 07:32:42,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:32:42,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:32:42,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:32:42,794 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:32:42,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:32:42,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574696771] [2022-12-14 07:32:42,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574696771] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:32:42,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:32:42,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:32:42,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411794089] [2022-12-14 07:32:42,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:32:42,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:32:42,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:32:42,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:32:42,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:32:42,796 INFO L87 Difference]: Start difference. First operand 31177 states and 45013 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:43,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:32:43,587 INFO L93 Difference]: Finished difference Result 79656 states and 115535 transitions. [2022-12-14 07:32:43,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:32:43,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 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 173 [2022-12-14 07:32:43,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:32:43,636 INFO L225 Difference]: With dead ends: 79656 [2022-12-14 07:32:43,636 INFO L226 Difference]: Without dead ends: 48480 [2022-12-14 07:32:43,652 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 [2022-12-14 07:32:43,653 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 173 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:32:43,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 216 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 07:32:43,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48480 states. [2022-12-14 07:32:44,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48480 to 47050. [2022-12-14 07:32:44,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47050 states, 47049 states have (on average 1.3672341601309272) internal successors, (64327), 47049 states have internal predecessors, (64327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:44,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47050 states to 47050 states and 64327 transitions. [2022-12-14 07:32:44,242 INFO L78 Accepts]: Start accepts. Automaton has 47050 states and 64327 transitions. Word has length 173 [2022-12-14 07:32:44,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:32:44,242 INFO L495 AbstractCegarLoop]: Abstraction has 47050 states and 64327 transitions. [2022-12-14 07:32:44,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:44,242 INFO L276 IsEmpty]: Start isEmpty. Operand 47050 states and 64327 transitions. [2022-12-14 07:32:44,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-12-14 07:32:44,249 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:32:44,249 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:32:44,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 07:32:44,249 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:32:44,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:32:44,249 INFO L85 PathProgramCache]: Analyzing trace with hash -357159664, now seen corresponding path program 1 times [2022-12-14 07:32:44,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:32:44,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128858198] [2022-12-14 07:32:44,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:32:44,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:32:44,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:32:44,454 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 07:32:44,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:32:44,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128858198] [2022-12-14 07:32:44,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128858198] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:32:44,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:32:44,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:32:44,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716121784] [2022-12-14 07:32:44,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:32:44,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:32:44,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:32:44,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:32:44,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:32:44,456 INFO L87 Difference]: Start difference. First operand 47050 states and 64327 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:45,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:32:45,489 INFO L93 Difference]: Finished difference Result 111402 states and 152671 transitions. [2022-12-14 07:32:45,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:32:45,489 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 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 177 [2022-12-14 07:32:45,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:32:45,560 INFO L225 Difference]: With dead ends: 111402 [2022-12-14 07:32:45,560 INFO L226 Difference]: Without dead ends: 64353 [2022-12-14 07:32:45,588 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 [2022-12-14 07:32:45,589 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 143 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:32:45,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 239 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 07:32:45,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64353 states. [2022-12-14 07:32:46,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64353 to 64353. [2022-12-14 07:32:46,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64353 states, 64352 states have (on average 1.3187002734957733) internal successors, (84861), 64352 states have internal predecessors, (84861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:46,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64353 states to 64353 states and 84861 transitions. [2022-12-14 07:32:46,516 INFO L78 Accepts]: Start accepts. Automaton has 64353 states and 84861 transitions. Word has length 177 [2022-12-14 07:32:46,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:32:46,517 INFO L495 AbstractCegarLoop]: Abstraction has 64353 states and 84861 transitions. [2022-12-14 07:32:46,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:46,517 INFO L276 IsEmpty]: Start isEmpty. Operand 64353 states and 84861 transitions. [2022-12-14 07:32:46,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-12-14 07:32:46,531 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:32:46,532 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:32:46,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 07:32:46,532 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:32:46,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:32:46,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1294212610, now seen corresponding path program 1 times [2022-12-14 07:32:46,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:32:46,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131178919] [2022-12-14 07:32:46,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:32:46,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:32:46,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:32:46,894 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 07:32:46,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:32:46,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131178919] [2022-12-14 07:32:46,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131178919] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:32:46,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:32:46,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:32:46,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125669425] [2022-12-14 07:32:46,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:32:46,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:32:46,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:32:46,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:32:46,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:32:46,896 INFO L87 Difference]: Start difference. First operand 64353 states and 84861 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:48,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:32:48,171 INFO L93 Difference]: Finished difference Result 162024 states and 214071 transitions. [2022-12-14 07:32:48,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:32:48,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 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 186 [2022-12-14 07:32:48,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:32:48,281 INFO L225 Difference]: With dead ends: 162024 [2022-12-14 07:32:48,282 INFO L226 Difference]: Without dead ends: 97672 [2022-12-14 07:32:48,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:32:48,319 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 136 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 07:32:48,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 75 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 07:32:48,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97672 states. [2022-12-14 07:32:49,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97672 to 97672. [2022-12-14 07:32:49,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97672 states, 97671 states have (on average 1.2980925760973063) internal successors, (126786), 97671 states have internal predecessors, (126786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:49,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97672 states to 97672 states and 126786 transitions. [2022-12-14 07:32:49,427 INFO L78 Accepts]: Start accepts. Automaton has 97672 states and 126786 transitions. Word has length 186 [2022-12-14 07:32:49,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:32:49,427 INFO L495 AbstractCegarLoop]: Abstraction has 97672 states and 126786 transitions. [2022-12-14 07:32:49,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:49,427 INFO L276 IsEmpty]: Start isEmpty. Operand 97672 states and 126786 transitions. [2022-12-14 07:32:49,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-12-14 07:32:49,552 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:32:49,552 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:32:49,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 07:32:49,553 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:32:49,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:32:49,553 INFO L85 PathProgramCache]: Analyzing trace with hash -683624363, now seen corresponding path program 1 times [2022-12-14 07:32:49,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:32:49,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904113852] [2022-12-14 07:32:49,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:32:49,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:32:49,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:32:49,759 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 53 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 07:32:49,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:32:49,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904113852] [2022-12-14 07:32:49,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904113852] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:32:49,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709758957] [2022-12-14 07:32:49,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:32:49,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:32:49,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:32:49,761 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:32:49,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 07:32:49,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:32:49,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 07:32:49,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:32:50,081 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 07:32:50,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:32:50,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709758957] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:32:50,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:32:50,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 07:32:50,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51130714] [2022-12-14 07:32:50,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:32:50,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:32:50,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:32:50,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:32:50,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:32:50,083 INFO L87 Difference]: Start difference. First operand 97672 states and 126786 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:51,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:32:51,276 INFO L93 Difference]: Finished difference Result 233524 states and 306117 transitions. [2022-12-14 07:32:51,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:32:51,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 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 191 [2022-12-14 07:32:51,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:32:51,417 INFO L225 Difference]: With dead ends: 233524 [2022-12-14 07:32:51,417 INFO L226 Difference]: Without dead ends: 136282 [2022-12-14 07:32:51,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:32:51,450 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 35 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:32:51,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 63 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 07:32:51,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136282 states. [2022-12-14 07:32:52,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136282 to 136282. [2022-12-14 07:32:53,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136282 states, 136281 states have (on average 1.2865916745547803) internal successors, (175338), 136281 states have internal predecessors, (175338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:53,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136282 states to 136282 states and 175338 transitions. [2022-12-14 07:32:53,277 INFO L78 Accepts]: Start accepts. Automaton has 136282 states and 175338 transitions. Word has length 191 [2022-12-14 07:32:53,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:32:53,278 INFO L495 AbstractCegarLoop]: Abstraction has 136282 states and 175338 transitions. [2022-12-14 07:32:53,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:53,278 INFO L276 IsEmpty]: Start isEmpty. Operand 136282 states and 175338 transitions. [2022-12-14 07:32:53,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-12-14 07:32:53,295 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:32:53,296 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:32:53,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 07:32:53,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 07:32:53,498 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:32:53,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:32:53,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1660448171, now seen corresponding path program 1 times [2022-12-14 07:32:53,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:32:53,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385918598] [2022-12-14 07:32:53,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:32:53,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:32:53,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:32:53,902 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 07:32:53,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:32:53,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385918598] [2022-12-14 07:32:53,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385918598] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:32:53,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:32:53,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:32:53,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517617535] [2022-12-14 07:32:53,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:32:53,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:32:53,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:32:53,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:32:53,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:32:53,903 INFO L87 Difference]: Start difference. First operand 136282 states and 175338 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:55,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:32:55,169 INFO L93 Difference]: Finished difference Result 273709 states and 352050 transitions. [2022-12-14 07:32:55,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:32:55,170 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 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 220 [2022-12-14 07:32:55,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:32:55,340 INFO L225 Difference]: With dead ends: 273709 [2022-12-14 07:32:55,340 INFO L226 Difference]: Without dead ends: 137857 [2022-12-14 07:32:55,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:32:55,390 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 117 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 07:32:55,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 114 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 07:32:55,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137857 states. [2022-12-14 07:32:56,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137857 to 136711. [2022-12-14 07:32:56,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136711 states, 136710 states have (on average 1.2861092824226465) internal successors, (175824), 136710 states have internal predecessors, (175824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:57,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136711 states to 136711 states and 175824 transitions. [2022-12-14 07:32:57,050 INFO L78 Accepts]: Start accepts. Automaton has 136711 states and 175824 transitions. Word has length 220 [2022-12-14 07:32:57,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:32:57,050 INFO L495 AbstractCegarLoop]: Abstraction has 136711 states and 175824 transitions. [2022-12-14 07:32:57,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:57,050 INFO L276 IsEmpty]: Start isEmpty. Operand 136711 states and 175824 transitions. [2022-12-14 07:32:57,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-12-14 07:32:57,063 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:32:57,064 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:32:57,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 07:32:57,064 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:32:57,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:32:57,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1212549011, now seen corresponding path program 1 times [2022-12-14 07:32:57,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:32:57,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149589136] [2022-12-14 07:32:57,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:32:57,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:32:57,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:32:57,503 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 90 proven. 6 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-12-14 07:32:57,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:32:57,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149589136] [2022-12-14 07:32:57,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149589136] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:32:57,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964991390] [2022-12-14 07:32:57,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:32:57,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:32:57,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:32:57,506 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:32:57,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 07:32:57,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:32:57,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 07:32:57,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:32:57,826 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-14 07:32:57,826 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:32:57,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964991390] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:32:57,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:32:57,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 07:32:57,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465453860] [2022-12-14 07:32:57,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:32:57,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:32:57,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:32:57,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:32:57,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:32:57,829 INFO L87 Difference]: Start difference. First operand 136711 states and 175824 transitions. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:59,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:32:59,405 INFO L93 Difference]: Finished difference Result 309600 states and 399633 transitions. [2022-12-14 07:32:59,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:32:59,406 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 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 235 [2022-12-14 07:32:59,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:32:59,618 INFO L225 Difference]: With dead ends: 309600 [2022-12-14 07:32:59,618 INFO L226 Difference]: Without dead ends: 173748 [2022-12-14 07:32:59,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:32:59,698 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 35 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 07:32:59,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 72 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 07:32:59,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173748 states. [2022-12-14 07:33:01,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173748 to 173176. [2022-12-14 07:33:01,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173176 states, 173175 states have (on average 1.2687570376786488) internal successors, (219717), 173175 states have internal predecessors, (219717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:33:01,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173176 states to 173176 states and 219717 transitions. [2022-12-14 07:33:01,825 INFO L78 Accepts]: Start accepts. Automaton has 173176 states and 219717 transitions. Word has length 235 [2022-12-14 07:33:01,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:33:01,825 INFO L495 AbstractCegarLoop]: Abstraction has 173176 states and 219717 transitions. [2022-12-14 07:33:01,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:33:01,825 INFO L276 IsEmpty]: Start isEmpty. Operand 173176 states and 219717 transitions. [2022-12-14 07:33:01,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-12-14 07:33:01,848 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:33:01,848 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:33:01,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 07:33:02,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 07:33:02,050 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:33:02,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:33:02,052 INFO L85 PathProgramCache]: Analyzing trace with hash 449391253, now seen corresponding path program 1 times [2022-12-14 07:33:02,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:33:02,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919342517] [2022-12-14 07:33:02,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:33:02,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:33:02,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:33:02,501 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 124 proven. 6 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-12-14 07:33:02,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:33:02,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919342517] [2022-12-14 07:33:02,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919342517] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:33:02,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757267248] [2022-12-14 07:33:02,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:33:02,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:33:02,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:33:02,503 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:33:02,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 07:33:02,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:33:02,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 07:33:02,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:33:02,765 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-14 07:33:02,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:33:02,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757267248] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:33:02,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:33:02,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 07:33:02,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282157666] [2022-12-14 07:33:02,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:33:02,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:33:02,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:33:02,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:33:02,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:33:02,768 INFO L87 Difference]: Start difference. First operand 173176 states and 219717 transitions. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:33:04,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:33:04,439 INFO L93 Difference]: Finished difference Result 354216 states and 450944 transitions. [2022-12-14 07:33:04,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:33:04,440 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 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 268 [2022-12-14 07:33:04,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:33:04,628 INFO L225 Difference]: With dead ends: 354216 [2022-12-14 07:33:04,628 INFO L226 Difference]: Without dead ends: 181899 [2022-12-14 07:33:04,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:33:04,686 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 107 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 07:33:04,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 255 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 07:33:04,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181899 states. [2022-12-14 07:33:06,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181899 to 164596. [2022-12-14 07:33:06,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164596 states, 164595 states have (on average 1.208766973480361) internal successors, (198957), 164595 states have internal predecessors, (198957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:33:06,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164596 states to 164596 states and 198957 transitions. [2022-12-14 07:33:06,996 INFO L78 Accepts]: Start accepts. Automaton has 164596 states and 198957 transitions. Word has length 268 [2022-12-14 07:33:06,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:33:06,996 INFO L495 AbstractCegarLoop]: Abstraction has 164596 states and 198957 transitions. [2022-12-14 07:33:06,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:33:06,997 INFO L276 IsEmpty]: Start isEmpty. Operand 164596 states and 198957 transitions. [2022-12-14 07:33:07,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-12-14 07:33:07,019 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:33:07,020 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:33:07,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 07:33:07,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 07:33:07,221 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:33:07,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:33:07,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1400957128, now seen corresponding path program 1 times [2022-12-14 07:33:07,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:33:07,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339262986] [2022-12-14 07:33:07,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:33:07,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:33:07,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:33:07,897 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:33:07,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:33:07,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339262986] [2022-12-14 07:33:07,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339262986] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:33:07,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894574053] [2022-12-14 07:33:07,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:33:07,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:33:07,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:33:07,899 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:33:07,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 07:33:08,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:33:08,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 07:33:08,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:33:08,248 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:33:08,248 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:33:08,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894574053] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:33:08,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:33:08,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-12-14 07:33:08,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224328889] [2022-12-14 07:33:08,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:33:08,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:33:08,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:33:08,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:33:08,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:33:08,250 INFO L87 Difference]: Start difference. First operand 164596 states and 198957 transitions. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:33:09,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:33:09,639 INFO L93 Difference]: Finished difference Result 339058 states and 410532 transitions. [2022-12-14 07:33:09,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:33:09,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 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 271 [2022-12-14 07:33:09,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:33:09,822 INFO L225 Difference]: With dead ends: 339058 [2022-12-14 07:33:09,822 INFO L226 Difference]: Without dead ends: 175607 [2022-12-14 07:33:09,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:33:09,876 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 41 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:33:09,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 198 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 07:33:09,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175607 states. [2022-12-14 07:33:11,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175607 to 170745. [2022-12-14 07:33:11,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170745 states, 170744 states have (on average 1.2018401817926252) internal successors, (205207), 170744 states have internal predecessors, (205207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:33:11,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170745 states to 170745 states and 205207 transitions. [2022-12-14 07:33:11,878 INFO L78 Accepts]: Start accepts. Automaton has 170745 states and 205207 transitions. Word has length 271 [2022-12-14 07:33:11,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:33:11,879 INFO L495 AbstractCegarLoop]: Abstraction has 170745 states and 205207 transitions. [2022-12-14 07:33:11,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:33:11,879 INFO L276 IsEmpty]: Start isEmpty. Operand 170745 states and 205207 transitions. [2022-12-14 07:33:11,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2022-12-14 07:33:11,901 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:33:11,901 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:33:11,906 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 07:33:12,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 07:33:12,103 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:33:12,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:33:12,104 INFO L85 PathProgramCache]: Analyzing trace with hash -207105621, now seen corresponding path program 1 times [2022-12-14 07:33:12,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:33:12,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538697694] [2022-12-14 07:33:12,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:33:12,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:33:12,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:33:12,367 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:33:12,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:33:12,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538697694] [2022-12-14 07:33:12,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538697694] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:33:12,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:33:12,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:33:12,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693400130] [2022-12-14 07:33:12,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:33:12,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:33:12,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:33:12,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:33:12,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:33:12,369 INFO L87 Difference]: Start difference. First operand 170745 states and 205207 transitions. Second operand has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:33:13,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:33:13,717 INFO L93 Difference]: Finished difference Result 271419 states and 323904 transitions. [2022-12-14 07:33:13,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:33:13,718 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 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 292 [2022-12-14 07:33:13,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:33:13,831 INFO L225 Difference]: With dead ends: 271419 [2022-12-14 07:33:13,831 INFO L226 Difference]: Without dead ends: 98673 [2022-12-14 07:33:13,902 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 [2022-12-14 07:33:13,902 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 16 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 07:33:13,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 241 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 07:33:13,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98673 states. [2022-12-14 07:33:15,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98673 to 83372. [2022-12-14 07:33:15,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83372 states, 83371 states have (on average 1.1373859015724892) internal successors, (94825), 83371 states have internal predecessors, (94825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:33:15,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83372 states to 83372 states and 94825 transitions. [2022-12-14 07:33:15,146 INFO L78 Accepts]: Start accepts. Automaton has 83372 states and 94825 transitions. Word has length 292 [2022-12-14 07:33:15,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:33:15,147 INFO L495 AbstractCegarLoop]: Abstraction has 83372 states and 94825 transitions. [2022-12-14 07:33:15,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:33:15,147 INFO L276 IsEmpty]: Start isEmpty. Operand 83372 states and 94825 transitions. [2022-12-14 07:33:15,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-12-14 07:33:15,166 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:33:15,167 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:33:15,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-14 07:33:15,167 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:33:15,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:33:15,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1937653864, now seen corresponding path program 1 times [2022-12-14 07:33:15,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:33:15,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436986778] [2022-12-14 07:33:15,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:33:15,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:33:15,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:33:15,870 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 151 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:33:15,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:33:15,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436986778] [2022-12-14 07:33:15,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436986778] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:33:15,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408777313] [2022-12-14 07:33:15,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:33:15,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:33:15,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:33:15,872 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:33:15,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 07:33:16,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:33:16,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 07:33:16,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:33:16,264 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 18 proven. 145 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 07:33:16,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:33:16,512 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 18 proven. 145 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 07:33:16,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408777313] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:33:16,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1479183023] [2022-12-14 07:33:16,534 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2022-12-14 07:33:16,534 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:33:16,537 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:33:16,541 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:33:16,542 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:38:48,075 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2022-12-14 07:38:48,794 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 104528 conjuctions. This might take some time... [2022-12-14 07:39:05,503 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 720 conjuctions. [2022-12-14 07:39:05,537 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2022-12-14 07:39:06,235 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 104528 conjuctions. This might take some time... [2022-12-14 07:39:24,042 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 720 conjuctions. [2022-12-14 07:39:24,738 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2022-12-14 07:39:25,477 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 104528 conjuctions. This might take some time... [2022-12-14 07:39:43,538 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 720 conjuctions. [2022-12-14 07:40:15,560 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:40:34,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1479183023] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:40:34,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:40:34,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 4, 4] total 12 [2022-12-14 07:40:34,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83966813] [2022-12-14 07:40:34,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:40:34,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 07:40:34,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:40:34,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 07:40:34,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-12-14 07:40:34,281 INFO L87 Difference]: Start difference. First operand 83372 states and 94825 transitions. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 6 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:40:38,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:40:38,693 INFO L93 Difference]: Finished difference Result 166045 states and 188957 transitions. [2022-12-14 07:40:38,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 07:40:38,694 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 6 states have internal predecessors, (147), 0 states have call successors, (0), 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 295 [2022-12-14 07:40:38,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:40:38,769 INFO L225 Difference]: With dead ends: 166045 [2022-12-14 07:40:38,770 INFO L226 Difference]: Without dead ends: 83818 [2022-12-14 07:40:38,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 890 GetRequests, 614 SyntacticMatches, 263 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1331 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-12-14 07:40:38,807 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 420 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-14 07:40:38,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [420 Valid, 59 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-14 07:40:38,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83818 states. [2022-12-14 07:40:39,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83818 to 83632. [2022-12-14 07:40:39,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83632 states, 83631 states have (on average 1.1375805622317083) internal successors, (95137), 83631 states have internal predecessors, (95137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:40:39,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83632 states to 83632 states and 95137 transitions. [2022-12-14 07:40:39,786 INFO L78 Accepts]: Start accepts. Automaton has 83632 states and 95137 transitions. Word has length 295 [2022-12-14 07:40:39,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:40:39,786 INFO L495 AbstractCegarLoop]: Abstraction has 83632 states and 95137 transitions. [2022-12-14 07:40:39,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 6 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:40:39,786 INFO L276 IsEmpty]: Start isEmpty. Operand 83632 states and 95137 transitions. [2022-12-14 07:40:39,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2022-12-14 07:40:39,806 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:40:39,807 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:40:39,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 07:40:40,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:40:40,009 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:40:40,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:40:40,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1944439885, now seen corresponding path program 1 times [2022-12-14 07:40:40,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:40:40,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273225993] [2022-12-14 07:40:40,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:40:40,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:40:40,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:40:40,189 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 209 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 07:40:40,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:40:40,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273225993] [2022-12-14 07:40:40,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273225993] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:40:40,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:40:40,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:40:40,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010065048] [2022-12-14 07:40:40,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:40:40,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:40:40,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:40:40,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:40:40,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:40:40,191 INFO L87 Difference]: Start difference. First operand 83632 states and 95137 transitions. Second operand has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:40:40,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:40:40,994 INFO L93 Difference]: Finished difference Result 166145 states and 189253 transitions. [2022-12-14 07:40:40,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:40:40,995 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 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 297 [2022-12-14 07:40:40,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:40:41,081 INFO L225 Difference]: With dead ends: 166145 [2022-12-14 07:40:41,081 INFO L226 Difference]: Without dead ends: 83918 [2022-12-14 07:40:41,122 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 [2022-12-14 07:40:41,123 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 119 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 07:40:41,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 216 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 07:40:41,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83918 states. [2022-12-14 07:40:41,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83918 to 82631. [2022-12-14 07:40:42,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82631 states, 82630 states have (on average 1.1395376981725764) internal successors, (94160), 82630 states have internal predecessors, (94160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:40:42,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82631 states to 82631 states and 94160 transitions. [2022-12-14 07:40:42,100 INFO L78 Accepts]: Start accepts. Automaton has 82631 states and 94160 transitions. Word has length 297 [2022-12-14 07:40:42,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:40:42,100 INFO L495 AbstractCegarLoop]: Abstraction has 82631 states and 94160 transitions. [2022-12-14 07:40:42,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:40:42,101 INFO L276 IsEmpty]: Start isEmpty. Operand 82631 states and 94160 transitions. [2022-12-14 07:40:42,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2022-12-14 07:40:42,122 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:40:42,122 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:40:42,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-14 07:40:42,122 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:40:42,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:40:42,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1464281441, now seen corresponding path program 1 times [2022-12-14 07:40:42,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:40:42,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692718160] [2022-12-14 07:40:42,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:40:42,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:40:42,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:40:42,415 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-12-14 07:40:42,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:40:42,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692718160] [2022-12-14 07:40:42,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692718160] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:40:42,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255020757] [2022-12-14 07:40:42,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:40:42,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:40:42,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:40:42,417 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:40:42,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 07:40:42,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:40:42,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 07:40:42,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:40:42,658 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-12-14 07:40:42,658 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:40:42,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255020757] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:40:42,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:40:42,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 07:40:42,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230631241] [2022-12-14 07:40:42,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:40:42,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:40:42,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:40:42,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:40:42,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:40:42,660 INFO L87 Difference]: Start difference. First operand 82631 states and 94160 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:40:43,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:40:43,963 INFO L93 Difference]: Finished difference Result 200006 states and 228523 transitions. [2022-12-14 07:40:43,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:40:43,964 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 305 [2022-12-14 07:40:43,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:40:44,097 INFO L225 Difference]: With dead ends: 200006 [2022-12-14 07:40:44,097 INFO L226 Difference]: Without dead ends: 117668 [2022-12-14 07:40:44,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:40:44,144 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 345 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:40:44,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 239 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 07:40:44,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117668 states. [2022-12-14 07:40:45,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117668 to 115521. [2022-12-14 07:40:45,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115521 states, 115520 states have (on average 1.1400363573407202) internal successors, (131697), 115520 states have internal predecessors, (131697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:40:45,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115521 states to 115521 states and 131697 transitions. [2022-12-14 07:40:45,789 INFO L78 Accepts]: Start accepts. Automaton has 115521 states and 131697 transitions. Word has length 305 [2022-12-14 07:40:45,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:40:45,789 INFO L495 AbstractCegarLoop]: Abstraction has 115521 states and 131697 transitions. [2022-12-14 07:40:45,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:40:45,790 INFO L276 IsEmpty]: Start isEmpty. Operand 115521 states and 131697 transitions. [2022-12-14 07:40:45,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2022-12-14 07:40:45,804 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:40:45,804 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:40:45,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 07:40:46,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:40:46,006 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:40:46,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:40:46,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1124820216, now seen corresponding path program 1 times [2022-12-14 07:40:46,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:40:46,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410056902] [2022-12-14 07:40:46,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:40:46,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:40:46,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:40:46,372 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 217 proven. 18 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 07:40:46,372 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:40:46,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410056902] [2022-12-14 07:40:46,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410056902] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:40:46,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494958209] [2022-12-14 07:40:46,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:40:46,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:40:46,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:40:46,373 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:40:46,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 07:40:46,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:40:46,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 07:40:46,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:40:46,705 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 235 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 07:40:46,705 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:40:46,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494958209] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:40:46,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:40:46,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-12-14 07:40:46,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051152824] [2022-12-14 07:40:46,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:40:46,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:40:46,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:40:46,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:40:46,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:40:46,707 INFO L87 Difference]: Start difference. First operand 115521 states and 131697 transitions. Second operand has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:40:48,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:40:48,336 INFO L93 Difference]: Finished difference Result 315439 states and 360194 transitions. [2022-12-14 07:40:48,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:40:48,337 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 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 316 [2022-12-14 07:40:48,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:40:48,561 INFO L225 Difference]: With dead ends: 315439 [2022-12-14 07:40:48,561 INFO L226 Difference]: Without dead ends: 201180 [2022-12-14 07:40:48,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:40:48,628 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 205 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 07:40:48,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 201 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 07:40:48,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201180 states. [2022-12-14 07:40:50,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201180 to 188165. [2022-12-14 07:40:50,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188165 states, 188164 states have (on average 1.141334155311324) internal successors, (214758), 188164 states have internal predecessors, (214758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:40:51,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188165 states to 188165 states and 214758 transitions. [2022-12-14 07:40:51,109 INFO L78 Accepts]: Start accepts. Automaton has 188165 states and 214758 transitions. Word has length 316 [2022-12-14 07:40:51,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:40:51,109 INFO L495 AbstractCegarLoop]: Abstraction has 188165 states and 214758 transitions. [2022-12-14 07:40:51,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:40:51,110 INFO L276 IsEmpty]: Start isEmpty. Operand 188165 states and 214758 transitions. [2022-12-14 07:40:51,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2022-12-14 07:40:51,132 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:40:51,132 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:40:51,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 07:40:51,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:40:51,335 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:40:51,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:40:51,336 INFO L85 PathProgramCache]: Analyzing trace with hash 879716512, now seen corresponding path program 1 times [2022-12-14 07:40:51,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:40:51,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065376596] [2022-12-14 07:40:51,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:40:51,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:40:51,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:40:51,614 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 07:40:51,614 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:40:51,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065376596] [2022-12-14 07:40:51,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065376596] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:40:51,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:40:51,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:40:51,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001358223] [2022-12-14 07:40:51,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:40:51,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:40:51,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:40:51,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:40:51,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:40:51,616 INFO L87 Difference]: Start difference. First operand 188165 states and 214758 transitions. Second operand has 4 states, 4 states have (on average 77.25) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:40:53,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:40:53,324 INFO L93 Difference]: Finished difference Result 381217 states and 435230 transitions. [2022-12-14 07:40:53,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:40:53,324 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 77.25) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 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 332 [2022-12-14 07:40:53,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:40:53,522 INFO L225 Difference]: With dead ends: 381217 [2022-12-14 07:40:53,522 INFO L226 Difference]: Without dead ends: 193885 [2022-12-14 07:40:53,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:40:53,589 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 134 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:40:53,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 57 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 07:40:53,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193885 states. [2022-12-14 07:40:55,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193885 to 185877. [2022-12-14 07:40:55,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185877 states, 185876 states have (on average 1.141255460629667) internal successors, (212132), 185876 states have internal predecessors, (212132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:40:55,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185877 states to 185877 states and 212132 transitions. [2022-12-14 07:40:55,882 INFO L78 Accepts]: Start accepts. Automaton has 185877 states and 212132 transitions. Word has length 332 [2022-12-14 07:40:55,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:40:55,882 INFO L495 AbstractCegarLoop]: Abstraction has 185877 states and 212132 transitions. [2022-12-14 07:40:55,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.25) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:40:55,882 INFO L276 IsEmpty]: Start isEmpty. Operand 185877 states and 212132 transitions. [2022-12-14 07:40:55,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2022-12-14 07:40:55,905 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:40:55,905 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:40:55,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-14 07:40:55,905 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:40:55,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:40:55,906 INFO L85 PathProgramCache]: Analyzing trace with hash 83175612, now seen corresponding path program 1 times [2022-12-14 07:40:55,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:40:55,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885015522] [2022-12-14 07:40:55,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:40:55,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:40:55,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:40:56,273 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 200 proven. 3 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-12-14 07:40:56,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:40:56,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885015522] [2022-12-14 07:40:56,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885015522] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:40:56,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189154889] [2022-12-14 07:40:56,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:40:56,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:40:56,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:40:56,275 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:40:56,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 07:40:56,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:40:56,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 07:40:56,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:40:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 203 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-12-14 07:40:56,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:40:56,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189154889] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:40:56,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:40:56,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-12-14 07:40:56,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245810928] [2022-12-14 07:40:56,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:40:56,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:40:56,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:40:56,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:40:56,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:40:56,668 INFO L87 Difference]: Start difference. First operand 185877 states and 212132 transitions. Second operand has 4 states, 4 states have (on average 61.25) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:40:58,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:40:58,470 INFO L93 Difference]: Finished difference Result 388224 states and 443295 transitions. [2022-12-14 07:40:58,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:40:58,471 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 61.25) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 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 338 [2022-12-14 07:40:58,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:40:58,704 INFO L225 Difference]: With dead ends: 388224 [2022-12-14 07:40:58,704 INFO L226 Difference]: Without dead ends: 203609 [2022-12-14 07:40:58,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:40:58,759 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 199 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 07:40:58,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 76 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 07:40:58,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203609 states. [2022-12-14 07:41:00,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203609 to 192026. [2022-12-14 07:41:00,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192026 states, 192025 states have (on average 1.1127873974742872) internal successors, (213683), 192025 states have internal predecessors, (213683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:41:01,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192026 states to 192026 states and 213683 transitions. [2022-12-14 07:41:01,256 INFO L78 Accepts]: Start accepts. Automaton has 192026 states and 213683 transitions. Word has length 338 [2022-12-14 07:41:01,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:41:01,257 INFO L495 AbstractCegarLoop]: Abstraction has 192026 states and 213683 transitions. [2022-12-14 07:41:01,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.25) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:41:01,257 INFO L276 IsEmpty]: Start isEmpty. Operand 192026 states and 213683 transitions. [2022-12-14 07:41:01,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2022-12-14 07:41:01,278 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:41:01,278 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:41:01,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 07:41:01,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-14 07:41:01,481 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:41:01,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:41:01,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1622018083, now seen corresponding path program 1 times [2022-12-14 07:41:01,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:41:01,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100825693] [2022-12-14 07:41:01,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:41:01,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:41:01,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:41:01,689 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 251 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 07:41:01,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:41:01,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100825693] [2022-12-14 07:41:01,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100825693] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:41:01,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:41:01,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:41:01,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235832981] [2022-12-14 07:41:01,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:41:01,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:41:01,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:41:01,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:41:01,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:41:01,691 INFO L87 Difference]: Start difference. First operand 192026 states and 213683 transitions. Second operand has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:41:03,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:41:03,508 INFO L93 Difference]: Finished difference Result 387080 states and 431576 transitions. [2022-12-14 07:41:03,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:41:03,509 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 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 341 [2022-12-14 07:41:03,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:41:03,718 INFO L225 Difference]: With dead ends: 387080 [2022-12-14 07:41:03,718 INFO L226 Difference]: Without dead ends: 196316 [2022-12-14 07:41:03,779 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 [2022-12-14 07:41:03,780 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 138 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:41:03,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 64 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 07:41:03,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196316 states. [2022-12-14 07:41:05,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196316 to 140975. [2022-12-14 07:41:05,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140975 states, 140974 states have (on average 1.1102401861336133) internal successors, (156515), 140974 states have internal predecessors, (156515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:41:05,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140975 states to 140975 states and 156515 transitions. [2022-12-14 07:41:05,956 INFO L78 Accepts]: Start accepts. Automaton has 140975 states and 156515 transitions. Word has length 341 [2022-12-14 07:41:05,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:41:05,956 INFO L495 AbstractCegarLoop]: Abstraction has 140975 states and 156515 transitions. [2022-12-14 07:41:05,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:41:05,956 INFO L276 IsEmpty]: Start isEmpty. Operand 140975 states and 156515 transitions. [2022-12-14 07:41:05,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2022-12-14 07:41:05,974 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:41:05,975 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:41:05,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-14 07:41:05,975 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:41:05,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:41:05,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1918053177, now seen corresponding path program 1 times [2022-12-14 07:41:05,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:41:05,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188312317] [2022-12-14 07:41:05,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:41:05,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:41:06,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:41:06,228 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 200 proven. 79 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-14 07:41:06,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:41:06,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188312317] [2022-12-14 07:41:06,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188312317] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:41:06,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794800932] [2022-12-14 07:41:06,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:41:06,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:41:06,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:41:06,229 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:41:06,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 07:41:06,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:41:06,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 07:41:06,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:41:06,506 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 315 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:41:06,507 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:41:06,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794800932] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:41:06,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:41:06,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 5 [2022-12-14 07:41:06,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998256300] [2022-12-14 07:41:06,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:41:06,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:41:06,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:41:06,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:41:06,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:41:06,508 INFO L87 Difference]: Start difference. First operand 140975 states and 156515 transitions. Second operand has 4 states, 4 states have (on average 84.75) internal successors, (339), 4 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:41:07,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:41:07,801 INFO L93 Difference]: Finished difference Result 267818 states and 296620 transitions. [2022-12-14 07:41:07,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:41:07,802 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 84.75) internal successors, (339), 4 states have internal predecessors, (339), 0 states have call successors, (0), 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 344 [2022-12-14 07:41:07,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:41:07,928 INFO L225 Difference]: With dead ends: 267818 [2022-12-14 07:41:07,928 INFO L226 Difference]: Without dead ends: 128105 [2022-12-14 07:41:07,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:41:07,982 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 225 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:41:07,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 225 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 07:41:08,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128105 states. [2022-12-14 07:41:09,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128105 to 121956. [2022-12-14 07:41:09,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121956 states, 121955 states have (on average 1.1030544053134352) internal successors, (134523), 121955 states have internal predecessors, (134523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:41:09,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121956 states to 121956 states and 134523 transitions. [2022-12-14 07:41:09,793 INFO L78 Accepts]: Start accepts. Automaton has 121956 states and 134523 transitions. Word has length 344 [2022-12-14 07:41:09,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:41:09,794 INFO L495 AbstractCegarLoop]: Abstraction has 121956 states and 134523 transitions. [2022-12-14 07:41:09,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 84.75) internal successors, (339), 4 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:41:09,794 INFO L276 IsEmpty]: Start isEmpty. Operand 121956 states and 134523 transitions. [2022-12-14 07:41:09,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2022-12-14 07:41:09,825 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:41:09,826 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:41:09,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 07:41:10,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-14 07:41:10,028 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:41:10,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:41:10,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1323170057, now seen corresponding path program 1 times [2022-12-14 07:41:10,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:41:10,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315013204] [2022-12-14 07:41:10,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:41:10,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:41:10,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:41:10,499 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 357 proven. 18 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 07:41:10,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:41:10,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315013204] [2022-12-14 07:41:10,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315013204] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:41:10,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039233085] [2022-12-14 07:41:10,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:41:10,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:41:10,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:41:10,500 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:41:10,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 07:41:10,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:41:10,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 07:41:10,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:41:10,865 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 396 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 07:41:10,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:41:10,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039233085] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:41:10,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:41:10,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 07:41:10,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527352467] [2022-12-14 07:41:10,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:41:10,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:41:10,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:41:10,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:41:10,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:41:10,867 INFO L87 Difference]: Start difference. First operand 121956 states and 134523 transitions. Second operand has 4 states, 4 states have (on average 85.75) internal successors, (343), 4 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:41:12,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:41:12,457 INFO L93 Difference]: Finished difference Result 254235 states and 279613 transitions. [2022-12-14 07:41:12,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:41:12,458 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 85.75) internal successors, (343), 4 states have internal predecessors, (343), 0 states have call successors, (0), 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 371 [2022-12-14 07:41:12,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:41:12,594 INFO L225 Difference]: With dead ends: 254235 [2022-12-14 07:41:12,594 INFO L226 Difference]: Without dead ends: 133541 [2022-12-14 07:41:12,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:41:12,649 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 237 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 07:41:12,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 185 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 984 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 07:41:12,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133541 states. [2022-12-14 07:41:14,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133541 to 123815. [2022-12-14 07:41:14,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123815 states, 123814 states have (on average 1.0981714507244738) internal successors, (135969), 123814 states have internal predecessors, (135969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:41:14,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123815 states to 123815 states and 135969 transitions. [2022-12-14 07:41:14,381 INFO L78 Accepts]: Start accepts. Automaton has 123815 states and 135969 transitions. Word has length 371 [2022-12-14 07:41:14,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:41:14,381 INFO L495 AbstractCegarLoop]: Abstraction has 123815 states and 135969 transitions. [2022-12-14 07:41:14,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.75) internal successors, (343), 4 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:41:14,381 INFO L276 IsEmpty]: Start isEmpty. Operand 123815 states and 135969 transitions. [2022-12-14 07:41:14,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2022-12-14 07:41:14,406 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:41:14,406 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:41:14,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 07:41:14,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-14 07:41:14,608 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:41:14,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:41:14,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1636047865, now seen corresponding path program 1 times [2022-12-14 07:41:14,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:41:14,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491647361] [2022-12-14 07:41:14,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:41:14,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:41:14,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:41:14,968 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 230 proven. 139 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-14 07:41:14,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:41:14,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491647361] [2022-12-14 07:41:14,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491647361] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:41:14,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112166550] [2022-12-14 07:41:14,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:41:14,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:41:14,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:41:14,969 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:41:14,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 07:41:15,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:41:15,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 07:41:15,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:41:15,433 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 411 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 07:41:15,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:41:15,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112166550] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:41:15,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:41:15,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3] total 7 [2022-12-14 07:41:15,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552652632] [2022-12-14 07:41:15,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:41:15,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:41:15,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:41:15,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:41:15,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:41:15,435 INFO L87 Difference]: Start difference. First operand 123815 states and 135969 transitions. Second operand has 5 states, 5 states have (on average 70.2) internal successors, (351), 5 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:41:17,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:41:17,548 INFO L93 Difference]: Finished difference Result 379503 states and 415217 transitions. [2022-12-14 07:41:17,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:41:17,549 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 70.2) internal successors, (351), 5 states have internal predecessors, (351), 0 states have call successors, (0), 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 374 [2022-12-14 07:41:17,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:41:17,806 INFO L225 Difference]: With dead ends: 379503 [2022-12-14 07:41:17,806 INFO L226 Difference]: Without dead ends: 253518 [2022-12-14 07:41:17,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 371 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:41:17,844 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 340 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 1082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 07:41:17,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 298 Invalid, 1082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 07:41:18,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253518 states. [2022-12-14 07:41:20,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253518 to 237071. [2022-12-14 07:41:20,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237071 states, 237070 states have (on average 1.093373265280297) internal successors, (259206), 237070 states have internal predecessors, (259206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:41:21,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237071 states to 237071 states and 259206 transitions. [2022-12-14 07:41:21,126 INFO L78 Accepts]: Start accepts. Automaton has 237071 states and 259206 transitions. Word has length 374 [2022-12-14 07:41:21,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:41:21,126 INFO L495 AbstractCegarLoop]: Abstraction has 237071 states and 259206 transitions. [2022-12-14 07:41:21,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.2) internal successors, (351), 5 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:41:21,126 INFO L276 IsEmpty]: Start isEmpty. Operand 237071 states and 259206 transitions. [2022-12-14 07:41:21,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2022-12-14 07:41:21,153 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:41:21,154 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:41:21,158 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 07:41:21,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-14 07:41:21,356 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:41:21,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:41:21,357 INFO L85 PathProgramCache]: Analyzing trace with hash -675411359, now seen corresponding path program 1 times [2022-12-14 07:41:21,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:41:21,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025181422] [2022-12-14 07:41:21,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:41:21,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:41:21,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:41:21,923 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 269 proven. 9 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-12-14 07:41:21,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:41:21,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025181422] [2022-12-14 07:41:21,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025181422] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:41:21,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875258750] [2022-12-14 07:41:21,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:41:21,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:41:21,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:41:21,924 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:41:21,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 07:41:22,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:41:22,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 07:41:22,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:41:22,166 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 272 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-12-14 07:41:22,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:41:22,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875258750] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:41:22,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:41:22,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-12-14 07:41:22,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147180669] [2022-12-14 07:41:22,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:41:22,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:41:22,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:41:22,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:41:22,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:41:22,167 INFO L87 Difference]: Start difference. First operand 237071 states and 259206 transitions. Second operand has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:41:24,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:41:24,268 INFO L93 Difference]: Finished difference Result 473881 states and 518235 transitions. [2022-12-14 07:41:24,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:41:24,269 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 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 389 [2022-12-14 07:41:24,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:41:24,568 INFO L225 Difference]: With dead ends: 473881 [2022-12-14 07:41:24,568 INFO L226 Difference]: Without dead ends: 238072 [2022-12-14 07:41:24,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:41:24,673 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 141 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:41:24,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 223 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 07:41:24,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238072 states. [2022-12-14 07:41:27,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238072 to 237786. [2022-12-14 07:41:27,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237786 states, 237785 states have (on average 1.0913514309144816) internal successors, (259507), 237785 states have internal predecessors, (259507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:41:27,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237786 states to 237786 states and 259507 transitions. [2022-12-14 07:41:27,996 INFO L78 Accepts]: Start accepts. Automaton has 237786 states and 259507 transitions. Word has length 389 [2022-12-14 07:41:27,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:41:27,996 INFO L495 AbstractCegarLoop]: Abstraction has 237786 states and 259507 transitions. [2022-12-14 07:41:27,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:41:27,996 INFO L276 IsEmpty]: Start isEmpty. Operand 237786 states and 259507 transitions. [2022-12-14 07:41:28,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2022-12-14 07:41:28,027 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:41:28,027 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:41:28,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 07:41:28,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-14 07:41:28,229 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:41:28,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:41:28,231 INFO L85 PathProgramCache]: Analyzing trace with hash 2048292659, now seen corresponding path program 1 times [2022-12-14 07:41:28,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:41:28,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257574700] [2022-12-14 07:41:28,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:41:28,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:41:28,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:41:28,776 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 381 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 07:41:28,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:41:28,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257574700] [2022-12-14 07:41:28,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257574700] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:41:28,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:41:28,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:41:28,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702942721] [2022-12-14 07:41:28,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:41:28,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:41:28,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:41:28,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:41:28,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:41:28,778 INFO L87 Difference]: Start difference. First operand 237786 states and 259507 transitions. Second operand has 4 states, 4 states have (on average 86.75) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:41:31,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:41:31,258 INFO L93 Difference]: Finished difference Result 490330 states and 534707 transitions. [2022-12-14 07:41:31,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:41:31,259 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 86.75) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 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 395 [2022-12-14 07:41:31,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:41:31,503 INFO L225 Difference]: With dead ends: 490330 [2022-12-14 07:41:31,503 INFO L226 Difference]: Without dead ends: 253806 [2022-12-14 07:41:31,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:41:31,556 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 208 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:41:31,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 159 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 07:41:31,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253806 states. [2022-12-14 07:41:34,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253806 to 238501. [2022-12-14 07:41:34,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238501 states, 238500 states have (on average 1.0908846960167715) internal successors, (260176), 238500 states have internal predecessors, (260176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:41:35,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238501 states to 238501 states and 260176 transitions. [2022-12-14 07:41:35,115 INFO L78 Accepts]: Start accepts. Automaton has 238501 states and 260176 transitions. Word has length 395 [2022-12-14 07:41:35,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:41:35,115 INFO L495 AbstractCegarLoop]: Abstraction has 238501 states and 260176 transitions. [2022-12-14 07:41:35,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 86.75) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:41:35,115 INFO L276 IsEmpty]: Start isEmpty. Operand 238501 states and 260176 transitions. [2022-12-14 07:41:35,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2022-12-14 07:41:35,148 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:41:35,148 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 07:41:35,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-12-14 07:41:35,148 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:41:35,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:41:35,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1648327714, now seen corresponding path program 1 times [2022-12-14 07:41:35,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:41:35,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579426879] [2022-12-14 07:41:35,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:41:35,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:41:35,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:41:35,748 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 378 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:41:35,748 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:41:35,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579426879] [2022-12-14 07:41:35,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579426879] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:41:35,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:41:35,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:41:35,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639295029] [2022-12-14 07:41:35,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:41:35,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:41:35,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:41:35,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:41:35,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:41:35,750 INFO L87 Difference]: Start difference. First operand 238501 states and 260176 transitions. Second operand has 4 states, 4 states have (on average 97.5) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:41:37,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:41:37,490 INFO L93 Difference]: Finished difference Result 407243 states and 444183 transitions. [2022-12-14 07:41:37,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:41:37,491 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 97.5) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 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 395 [2022-12-14 07:41:37,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:41:37,659 INFO L225 Difference]: With dead ends: 407243 [2022-12-14 07:41:37,659 INFO L226 Difference]: Without dead ends: 161853 [2022-12-14 07:41:37,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:41:37,743 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 190 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:41:37,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 10 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 07:41:37,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161853 states. [2022-12-14 07:41:39,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161853 to 121670. [2022-12-14 07:41:39,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121670 states, 121669 states have (on average 1.0898010175147326) internal successors, (132595), 121669 states have internal predecessors, (132595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:41:39,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121670 states to 121670 states and 132595 transitions. [2022-12-14 07:41:39,706 INFO L78 Accepts]: Start accepts. Automaton has 121670 states and 132595 transitions. Word has length 395 [2022-12-14 07:41:39,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:41:39,706 INFO L495 AbstractCegarLoop]: Abstraction has 121670 states and 132595 transitions. [2022-12-14 07:41:39,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 97.5) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:41:39,707 INFO L276 IsEmpty]: Start isEmpty. Operand 121670 states and 132595 transitions. [2022-12-14 07:41:39,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2022-12-14 07:41:39,729 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:41:39,730 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:41:39,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-12-14 07:41:39,730 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:41:39,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:41:39,730 INFO L85 PathProgramCache]: Analyzing trace with hash 422048875, now seen corresponding path program 1 times [2022-12-14 07:41:39,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:41:39,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399707617] [2022-12-14 07:41:39,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:41:39,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:41:39,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:41:40,105 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 307 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-12-14 07:41:40,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:41:40,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399707617] [2022-12-14 07:41:40,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399707617] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:41:40,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:41:40,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:41:40,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74572594] [2022-12-14 07:41:40,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:41:40,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:41:40,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:41:40,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:41:40,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:41:40,106 INFO L87 Difference]: Start difference. First operand 121670 states and 132595 transitions. Second operand has 4 states, 4 states have (on average 63.5) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:41:42,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:41:42,198 INFO L93 Difference]: Finished difference Result 315010 states and 342320 transitions. [2022-12-14 07:41:42,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:41:42,198 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 63.5) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 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 403 [2022-12-14 07:41:42,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:41:42,377 INFO L225 Difference]: With dead ends: 315010 [2022-12-14 07:41:42,377 INFO L226 Difference]: Without dead ends: 192743 [2022-12-14 07:41:42,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:41:42,414 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 350 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 07:41:42,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 180 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 07:41:42,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192743 states. [2022-12-14 07:41:44,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192743 to 165142. [2022-12-14 07:41:44,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165142 states, 165141 states have (on average 1.0882760792292647) internal successors, (179719), 165141 states have internal predecessors, (179719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:41:44,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165142 states to 165142 states and 179719 transitions. [2022-12-14 07:41:44,836 INFO L78 Accepts]: Start accepts. Automaton has 165142 states and 179719 transitions. Word has length 403 [2022-12-14 07:41:44,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:41:44,836 INFO L495 AbstractCegarLoop]: Abstraction has 165142 states and 179719 transitions. [2022-12-14 07:41:44,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.5) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:41:44,836 INFO L276 IsEmpty]: Start isEmpty. Operand 165142 states and 179719 transitions. [2022-12-14 07:41:44,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2022-12-14 07:41:44,851 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:41:44,851 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:41:44,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-12-14 07:41:44,851 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:41:44,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:41:44,852 INFO L85 PathProgramCache]: Analyzing trace with hash 442257405, now seen corresponding path program 1 times [2022-12-14 07:41:44,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:41:44,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52272870] [2022-12-14 07:41:44,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:41:44,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:41:44,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:41:45,131 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 251 proven. 0 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-12-14 07:41:45,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:41:45,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52272870] [2022-12-14 07:41:45,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52272870] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:41:45,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:41:45,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:41:45,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805967209] [2022-12-14 07:41:45,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:41:45,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:41:45,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:41:45,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:41:45,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:41:45,133 INFO L87 Difference]: Start difference. First operand 165142 states and 179719 transitions. Second operand has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 2 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:41:46,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:41:46,827 INFO L93 Difference]: Finished difference Result 365775 states and 397834 transitions. [2022-12-14 07:41:46,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:41:46,828 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 2 states have internal predecessors, (260), 0 states have call successors, (0), 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 416 [2022-12-14 07:41:46,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:41:47,043 INFO L225 Difference]: With dead ends: 365775 [2022-12-14 07:41:47,043 INFO L226 Difference]: Without dead ends: 201466 [2022-12-14 07:41:47,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:41:47,109 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 43 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 07:41:47,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 68 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 07:41:47,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201466 states. [2022-12-14 07:41:49,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201466 to 196888. [2022-12-14 07:41:49,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196888 states, 196887 states have (on average 1.088350170402312) internal successors, (214282), 196887 states have internal predecessors, (214282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:41:50,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196888 states to 196888 states and 214282 transitions. [2022-12-14 07:41:50,178 INFO L78 Accepts]: Start accepts. Automaton has 196888 states and 214282 transitions. Word has length 416 [2022-12-14 07:41:50,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:41:50,178 INFO L495 AbstractCegarLoop]: Abstraction has 196888 states and 214282 transitions. [2022-12-14 07:41:50,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 2 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:41:50,178 INFO L276 IsEmpty]: Start isEmpty. Operand 196888 states and 214282 transitions. [2022-12-14 07:41:50,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2022-12-14 07:41:50,201 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:41:50,201 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:41:50,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-12-14 07:41:50,202 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:41:50,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:41:50,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1101741752, now seen corresponding path program 1 times [2022-12-14 07:41:50,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:41:50,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809974596] [2022-12-14 07:41:50,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:41:50,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:41:50,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:41:50,868 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 388 proven. 170 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:41:50,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:41:50,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809974596] [2022-12-14 07:41:50,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809974596] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:41:50,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709479765] [2022-12-14 07:41:50,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:41:50,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:41:50,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:41:50,870 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:41:50,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7262ed7e-5722-4818-8bd0-fbfa200f947c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 07:41:51,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:41:51,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 07:41:51,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:41:51,377 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 365 proven. 174 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 07:41:51,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:41:51,663 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 365 proven. 174 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 07:41:51,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709479765] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:41:51,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [632609370] [2022-12-14 07:41:51,668 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2022-12-14 07:41:51,668 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:41:51,669 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:41:51,669 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:41:51,669 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs