./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label25.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_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/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_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label25.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/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_1fc6295f-a131-43ef-b77b-ae5531116503/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 6036572cc480aba1617ffcf5de0f96e18071f7d06d6847cfbda5ebab0921c496 --- 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 11:30:37,675 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 11:30:37,677 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 11:30:37,688 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 11:30:37,689 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 11:30:37,689 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 11:30:37,690 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 11:30:37,691 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 11:30:37,692 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 11:30:37,693 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 11:30:37,693 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 11:30:37,694 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 11:30:37,694 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 11:30:37,695 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 11:30:37,695 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 11:30:37,696 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 11:30:37,696 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 11:30:37,697 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 11:30:37,698 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 11:30:37,699 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 11:30:37,700 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 11:30:37,702 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 11:30:37,703 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 11:30:37,707 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 11:30:37,713 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 11:30:37,713 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 11:30:37,713 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 11:30:37,714 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 11:30:37,714 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 11:30:37,715 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 11:30:37,715 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 11:30:37,716 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 11:30:37,716 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 11:30:37,717 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 11:30:37,717 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 11:30:37,718 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 11:30:37,718 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 11:30:37,718 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 11:30:37,718 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 11:30:37,719 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 11:30:37,719 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 11:30:37,720 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 11:30:37,736 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 11:30:37,741 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 11:30:37,741 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 11:30:37,741 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 11:30:37,742 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 11:30:37,742 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 11:30:37,742 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 11:30:37,742 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 11:30:37,742 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 11:30:37,743 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 11:30:37,743 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 11:30:37,743 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 11:30:37,743 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 11:30:37,743 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 11:30:37,743 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 11:30:37,744 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 11:30:37,744 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 11:30:37,744 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 11:30:37,745 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 11:30:37,745 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 11:30:37,745 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 11:30:37,745 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 11:30:37,745 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 11:30:37,745 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 11:30:37,746 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 11:30:37,746 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 11:30:37,746 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 11:30:37,746 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 11:30:37,746 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 11:30:37,746 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 11:30:37,746 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 11:30:37,747 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 11:30:37,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:30:37,747 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 11:30:37,747 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 11:30:37,747 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 11:30:37,747 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 11:30:37,748 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 11:30:37,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 11:30:37,748 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 11:30:37,748 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 11:30:37,748 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_1fc6295f-a131-43ef-b77b-ae5531116503/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6036572cc480aba1617ffcf5de0f96e18071f7d06d6847cfbda5ebab0921c496 [2022-12-14 11:30:37,913 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 11:30:37,933 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 11:30:37,935 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 11:30:37,937 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 11:30:37,937 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 11:30:37,938 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/eca-rers2012/Problem03_label25.c [2022-12-14 11:30:40,521 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 11:30:40,748 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 11:30:40,749 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/sv-benchmarks/c/eca-rers2012/Problem03_label25.c [2022-12-14 11:30:40,759 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/data/daf048dde/c47c4cb9c49941c89bd3e9569d38c9a4/FLAG45d616403 [2022-12-14 11:30:40,770 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/data/daf048dde/c47c4cb9c49941c89bd3e9569d38c9a4 [2022-12-14 11:30:40,772 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 11:30:40,773 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 11:30:40,774 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 11:30:40,774 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 11:30:40,777 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 11:30:40,778 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:30:40" (1/1) ... [2022-12-14 11:30:40,779 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f41bc08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:30:40, skipping insertion in model container [2022-12-14 11:30:40,779 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:30:40" (1/1) ... [2022-12-14 11:30:40,786 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 11:30:40,845 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:30:41,218 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_1fc6295f-a131-43ef-b77b-ae5531116503/sv-benchmarks/c/eca-rers2012/Problem03_label25.c[58529,58542] [2022-12-14 11:30:41,257 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:30:41,265 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 11:30:41,429 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_1fc6295f-a131-43ef-b77b-ae5531116503/sv-benchmarks/c/eca-rers2012/Problem03_label25.c[58529,58542] [2022-12-14 11:30:41,437 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:30:41,449 INFO L208 MainTranslator]: Completed translation [2022-12-14 11:30:41,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:30:41 WrapperNode [2022-12-14 11:30:41,449 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 11:30:41,450 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 11:30:41,450 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 11:30:41,450 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 11:30:41,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:30:41" (1/1) ... [2022-12-14 11:30:41,478 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:30:41" (1/1) ... [2022-12-14 11:30:41,540 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-12-14 11:30:41,541 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 11:30:41,541 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 11:30:41,541 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 11:30:41,542 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 11:30:41,550 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:30:41" (1/1) ... [2022-12-14 11:30:41,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:30:41" (1/1) ... [2022-12-14 11:30:41,557 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:30:41" (1/1) ... [2022-12-14 11:30:41,557 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:30:41" (1/1) ... [2022-12-14 11:30:41,590 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:30:41" (1/1) ... [2022-12-14 11:30:41,613 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:30:41" (1/1) ... [2022-12-14 11:30:41,627 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:30:41" (1/1) ... [2022-12-14 11:30:41,632 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:30:41" (1/1) ... [2022-12-14 11:30:41,644 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 11:30:41,645 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 11:30:41,645 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 11:30:41,645 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 11:30:41,646 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:30:41" (1/1) ... [2022-12-14 11:30:41,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:30:41,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:30:41,674 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 11:30:41,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 11:30:41,710 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 11:30:41,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 11:30:41,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 11:30:41,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 11:30:41,784 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 11:30:41,786 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 11:30:43,011 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 11:30:43,320 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 11:30:43,320 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 11:30:43,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:30:43 BoogieIcfgContainer [2022-12-14 11:30:43,324 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 11:30:43,326 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 11:30:43,327 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 11:30:43,330 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 11:30:43,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:30:40" (1/3) ... [2022-12-14 11:30:43,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40960489 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:30:43, skipping insertion in model container [2022-12-14 11:30:43,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:30:41" (2/3) ... [2022-12-14 11:30:43,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40960489 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:30:43, skipping insertion in model container [2022-12-14 11:30:43,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:30:43" (3/3) ... [2022-12-14 11:30:43,333 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label25.c [2022-12-14 11:30:43,353 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 11:30:43,354 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 11:30:43,407 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 11:30:43,413 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;@58d918d0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 11:30:43,414 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 11:30:43,419 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 11:30:43,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-14 11:30:43,430 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:30:43,431 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 11:30:43,431 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:30:43,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:30:43,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1724859207, now seen corresponding path program 1 times [2022-12-14 11:30:43,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:30:43,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129560457] [2022-12-14 11:30:43,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:43,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:30:43,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:44,137 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 11:30:44,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:30:44,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129560457] [2022-12-14 11:30:44,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129560457] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:30:44,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:30:44,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 11:30:44,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568045524] [2022-12-14 11:30:44,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:30:44,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:30:44,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:30:44,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:30:44,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:30:44,166 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 11:30:44,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:30:44,858 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2022-12-14 11:30:44,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:30:44,860 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 11:30:44,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:30:44,871 INFO L225 Difference]: With dead ends: 440 [2022-12-14 11:30:44,871 INFO L226 Difference]: Without dead ends: 289 [2022-12-14 11:30:44,873 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 11:30:44,875 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 28 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:30:44,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 35 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 11:30:44,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-12-14 11:30:44,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2022-12-14 11:30:44,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.8680555555555556) internal successors, (538), 288 states have internal predecessors, (538), 0 states have call successors, (0), 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 11:30:44,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 538 transitions. [2022-12-14 11:30:44,931 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 538 transitions. Word has length 143 [2022-12-14 11:30:44,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:30:44,932 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 538 transitions. [2022-12-14 11:30:44,932 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 11:30:44,933 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 538 transitions. [2022-12-14 11:30:44,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-12-14 11:30:44,937 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:30:44,937 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 11:30:44,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 11:30:44,938 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:30:44,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:30:44,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1932987375, now seen corresponding path program 1 times [2022-12-14 11:30:44,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:30:44,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645928532] [2022-12-14 11:30:44,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:44,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:30:44,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:45,178 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 11:30:45,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:30:45,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645928532] [2022-12-14 11:30:45,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645928532] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:30:45,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:30:45,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 11:30:45,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149728640] [2022-12-14 11:30:45,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:30:45,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:30:45,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:30:45,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:30:45,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:30:45,182 INFO L87 Difference]: Start difference. First operand 289 states and 538 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 11:30:45,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:30:45,716 INFO L93 Difference]: Finished difference Result 865 states and 1612 transitions. [2022-12-14 11:30:45,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:30:45,716 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 11:30:45,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:30:45,720 INFO L225 Difference]: With dead ends: 865 [2022-12-14 11:30:45,720 INFO L226 Difference]: Without dead ends: 577 [2022-12-14 11:30:45,721 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 11:30:45,722 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 187 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:30:45,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 41 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 11:30:45,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-12-14 11:30:45,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 575. [2022-12-14 11:30:45,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.8344947735191637) internal successors, (1053), 574 states have internal predecessors, (1053), 0 states have call successors, (0), 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 11:30:45,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1053 transitions. [2022-12-14 11:30:45,753 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1053 transitions. Word has length 147 [2022-12-14 11:30:45,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:30:45,753 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 1053 transitions. [2022-12-14 11:30:45,753 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 11:30:45,754 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1053 transitions. [2022-12-14 11:30:45,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-12-14 11:30:45,757 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:30:45,758 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 11:30:45,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 11:30:45,758 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:30:45,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:30:45,759 INFO L85 PathProgramCache]: Analyzing trace with hash -688080493, now seen corresponding path program 1 times [2022-12-14 11:30:45,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:30:45,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964296597] [2022-12-14 11:30:45,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:45,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:30:45,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:46,070 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 11:30:46,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:30:46,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964296597] [2022-12-14 11:30:46,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964296597] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:30:46,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:30:46,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 11:30:46,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61802437] [2022-12-14 11:30:46,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:30:46,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:30:46,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:30:46,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:30:46,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:30:46,073 INFO L87 Difference]: Start difference. First operand 575 states and 1053 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 11:30:46,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:30:46,653 INFO L93 Difference]: Finished difference Result 1721 states and 3156 transitions. [2022-12-14 11:30:46,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:30:46,654 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 11:30:46,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:30:46,656 INFO L225 Difference]: With dead ends: 1721 [2022-12-14 11:30:46,657 INFO L226 Difference]: Without dead ends: 1147 [2022-12-14 11:30:46,658 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 11:30:46,659 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 153 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:30:46,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 43 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 11:30:46,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2022-12-14 11:30:46,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1147. [2022-12-14 11:30:46,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.7155322862129145) internal successors, (1966), 1146 states have internal predecessors, (1966), 0 states have call successors, (0), 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 11:30:46,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1966 transitions. [2022-12-14 11:30:46,678 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1966 transitions. Word has length 153 [2022-12-14 11:30:46,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:30:46,678 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1966 transitions. [2022-12-14 11:30:46,678 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 11:30:46,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1966 transitions. [2022-12-14 11:30:46,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-12-14 11:30:46,680 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:30:46,681 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:30:46,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 11:30:46,681 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:30:46,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:30:46,681 INFO L85 PathProgramCache]: Analyzing trace with hash -341448695, now seen corresponding path program 1 times [2022-12-14 11:30:46,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:30:46,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644190601] [2022-12-14 11:30:46,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:46,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:30:46,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:46,843 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:46,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:30:46,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644190601] [2022-12-14 11:30:46,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644190601] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:30:46,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:30:46,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 11:30:46,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700625243] [2022-12-14 11:30:46,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:30:46,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:30:46,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:30:46,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:30:46,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:30:46,846 INFO L87 Difference]: Start difference. First operand 1147 states and 1966 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 0 states have call successors, (0), 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 11:30:47,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:30:47,434 INFO L93 Difference]: Finished difference Result 3439 states and 5896 transitions. [2022-12-14 11:30:47,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:30:47,434 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 0 states have call successors, (0), 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 157 [2022-12-14 11:30:47,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:30:47,443 INFO L225 Difference]: With dead ends: 3439 [2022-12-14 11:30:47,443 INFO L226 Difference]: Without dead ends: 2293 [2022-12-14 11:30:47,444 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 11:30:47,445 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 157 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:30:47,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 48 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 11:30:47,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2022-12-14 11:30:47,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 2291. [2022-12-14 11:30:47,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 1.6) internal successors, (3664), 2290 states have internal predecessors, (3664), 0 states have call successors, (0), 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 11:30:47,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 3664 transitions. [2022-12-14 11:30:47,480 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 3664 transitions. Word has length 157 [2022-12-14 11:30:47,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:30:47,480 INFO L495 AbstractCegarLoop]: Abstraction has 2291 states and 3664 transitions. [2022-12-14 11:30:47,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 0 states have call successors, (0), 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 11:30:47,481 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 3664 transitions. [2022-12-14 11:30:47,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-12-14 11:30:47,483 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:30:47,484 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:30:47,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 11:30:47,484 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:30:47,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:30:47,484 INFO L85 PathProgramCache]: Analyzing trace with hash 2139847646, now seen corresponding path program 1 times [2022-12-14 11:30:47,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:30:47,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460356795] [2022-12-14 11:30:47,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:47,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:30:47,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:47,722 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:47,722 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:30:47,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460356795] [2022-12-14 11:30:47,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460356795] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:30:47,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:30:47,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 11:30:47,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033780268] [2022-12-14 11:30:47,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:30:47,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:30:47,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:30:47,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:30:47,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:30:47,725 INFO L87 Difference]: Start difference. First operand 2291 states and 3664 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 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 11:30:48,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:30:48,394 INFO L93 Difference]: Finished difference Result 6726 states and 10775 transitions. [2022-12-14 11:30:48,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:30:48,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 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 162 [2022-12-14 11:30:48,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:30:48,407 INFO L225 Difference]: With dead ends: 6726 [2022-12-14 11:30:48,407 INFO L226 Difference]: Without dead ends: 4436 [2022-12-14 11:30:48,410 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 11:30:48,411 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 128 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:30:48,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 78 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 11:30:48,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4436 states. [2022-12-14 11:30:48,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4436 to 4436. [2022-12-14 11:30:48,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4436 states, 4435 states have (on average 1.5028184892897407) internal successors, (6665), 4435 states have internal predecessors, (6665), 0 states have call successors, (0), 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 11:30:48,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4436 states to 4436 states and 6665 transitions. [2022-12-14 11:30:48,478 INFO L78 Accepts]: Start accepts. Automaton has 4436 states and 6665 transitions. Word has length 162 [2022-12-14 11:30:48,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:30:48,479 INFO L495 AbstractCegarLoop]: Abstraction has 4436 states and 6665 transitions. [2022-12-14 11:30:48,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 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 11:30:48,479 INFO L276 IsEmpty]: Start isEmpty. Operand 4436 states and 6665 transitions. [2022-12-14 11:30:48,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-12-14 11:30:48,483 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:30:48,484 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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 11:30:48,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 11:30:48,484 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:30:48,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:30:48,484 INFO L85 PathProgramCache]: Analyzing trace with hash 60831999, now seen corresponding path program 1 times [2022-12-14 11:30:48,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:30:48,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051182485] [2022-12-14 11:30:48,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:48,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:30:48,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:48,673 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:48,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:30:48,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051182485] [2022-12-14 11:30:48,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051182485] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:30:48,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062625046] [2022-12-14 11:30:48,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:48,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:30:48,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:30:48,676 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:30:48,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 11:30:48,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:48,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 11:30:48,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:30:48,867 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:30:48,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:30:48,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062625046] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:30:48,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:30:48,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-12-14 11:30:48,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023886484] [2022-12-14 11:30:48,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:30:48,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:30:48,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:30:48,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:30:48,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:30:48,869 INFO L87 Difference]: Start difference. First operand 4436 states and 6665 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 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 11:30:49,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:30:49,569 INFO L93 Difference]: Finished difference Result 12160 states and 18455 transitions. [2022-12-14 11:30:49,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:30:49,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 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 167 [2022-12-14 11:30:49,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:30:49,590 INFO L225 Difference]: With dead ends: 12160 [2022-12-14 11:30:49,590 INFO L226 Difference]: Without dead ends: 7868 [2022-12-14 11:30:49,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 167 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 11:30:49,595 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 148 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:30:49,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 266 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 11:30:49,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7868 states. [2022-12-14 11:30:49,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7868 to 7868. [2022-12-14 11:30:49,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7868 states, 7867 states have (on average 1.3242659209355536) internal successors, (10418), 7867 states have internal predecessors, (10418), 0 states have call successors, (0), 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 11:30:49,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7868 states to 7868 states and 10418 transitions. [2022-12-14 11:30:49,729 INFO L78 Accepts]: Start accepts. Automaton has 7868 states and 10418 transitions. Word has length 167 [2022-12-14 11:30:49,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:30:49,730 INFO L495 AbstractCegarLoop]: Abstraction has 7868 states and 10418 transitions. [2022-12-14 11:30:49,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 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 11:30:49,730 INFO L276 IsEmpty]: Start isEmpty. Operand 7868 states and 10418 transitions. [2022-12-14 11:30:49,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-12-14 11:30:49,736 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:30:49,736 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:30:49,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 11:30:49,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:30:49,937 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:30:49,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:30:49,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1112421667, now seen corresponding path program 1 times [2022-12-14 11:30:49,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:30:49,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679285015] [2022-12-14 11:30:49,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:49,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:30:49,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:50,023 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:50,023 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:30:50,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679285015] [2022-12-14 11:30:50,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679285015] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:30:50,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:30:50,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:30:50,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103307415] [2022-12-14 11:30:50,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:30:50,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:30:50,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:30:50,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:30:50,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:30:50,024 INFO L87 Difference]: Start difference. First operand 7868 states and 10418 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 11:30:50,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:30:50,631 INFO L93 Difference]: Finished difference Result 20311 states and 26970 transitions. [2022-12-14 11:30:50,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:30:50,632 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 168 [2022-12-14 11:30:50,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:30:50,654 INFO L225 Difference]: With dead ends: 20311 [2022-12-14 11:30:50,655 INFO L226 Difference]: Without dead ends: 12587 [2022-12-14 11:30:50,659 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 11:30:50,660 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 153 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:30:50,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 62 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 11:30:50,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12587 states. [2022-12-14 11:30:50,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12587 to 12587. [2022-12-14 11:30:50,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12587 states, 12586 states have (on average 1.2892896869537582) internal successors, (16227), 12586 states have internal predecessors, (16227), 0 states have call successors, (0), 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 11:30:50,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12587 states to 12587 states and 16227 transitions. [2022-12-14 11:30:50,842 INFO L78 Accepts]: Start accepts. Automaton has 12587 states and 16227 transitions. Word has length 168 [2022-12-14 11:30:50,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:30:50,842 INFO L495 AbstractCegarLoop]: Abstraction has 12587 states and 16227 transitions. [2022-12-14 11:30:50,843 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 11:30:50,843 INFO L276 IsEmpty]: Start isEmpty. Operand 12587 states and 16227 transitions. [2022-12-14 11:30:50,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-12-14 11:30:50,853 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:30:50,853 INFO L195 NwaCegarLoop]: trace histogram [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, 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 11:30:50,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 11:30:50,853 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:30:50,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:30:50,853 INFO L85 PathProgramCache]: Analyzing trace with hash 715216923, now seen corresponding path program 1 times [2022-12-14 11:30:50,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:30:50,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979882492] [2022-12-14 11:30:50,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:50,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:30:50,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:51,177 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:51,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:30:51,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979882492] [2022-12-14 11:30:51,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979882492] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:30:51,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073712776] [2022-12-14 11:30:51,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:51,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:30:51,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:30:51,179 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:30:51,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 11:30:51,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:51,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 11:30:51,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:30:51,355 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:30:51,355 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:30:51,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073712776] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:30:51,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:30:51,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-12-14 11:30:51,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120382389] [2022-12-14 11:30:51,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:30:51,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:30:51,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:30:51,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:30:51,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:30:51,358 INFO L87 Difference]: Start difference. First operand 12587 states and 16227 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 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 11:30:51,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:30:51,999 INFO L93 Difference]: Finished difference Result 28748 states and 38011 transitions. [2022-12-14 11:30:51,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:30:51,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 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 169 [2022-12-14 11:30:51,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:30:52,019 INFO L225 Difference]: With dead ends: 28748 [2022-12-14 11:30:52,020 INFO L226 Difference]: Without dead ends: 16305 [2022-12-14 11:30:52,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 168 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 11:30:52,027 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 140 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:30:52,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 86 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 11:30:52,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16305 states. [2022-12-14 11:30:52,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16305 to 16305. [2022-12-14 11:30:52,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16305 states, 16304 states have (on average 1.2596295387634937) internal successors, (20537), 16304 states have internal predecessors, (20537), 0 states have call successors, (0), 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 11:30:52,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16305 states to 16305 states and 20537 transitions. [2022-12-14 11:30:52,222 INFO L78 Accepts]: Start accepts. Automaton has 16305 states and 20537 transitions. Word has length 169 [2022-12-14 11:30:52,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:30:52,222 INFO L495 AbstractCegarLoop]: Abstraction has 16305 states and 20537 transitions. [2022-12-14 11:30:52,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 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 11:30:52,223 INFO L276 IsEmpty]: Start isEmpty. Operand 16305 states and 20537 transitions. [2022-12-14 11:30:52,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-12-14 11:30:52,233 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:30:52,233 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:30:52,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 11:30:52,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:30:52,434 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:30:52,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:30:52,435 INFO L85 PathProgramCache]: Analyzing trace with hash -506773886, now seen corresponding path program 1 times [2022-12-14 11:30:52,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:30:52,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809394765] [2022-12-14 11:30:52,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:52,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:30:52,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:52,688 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 34 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:52,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:30:52,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809394765] [2022-12-14 11:30:52,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809394765] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:30:52,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182666875] [2022-12-14 11:30:52,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:52,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:30:52,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:30:52,690 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:30:52,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 11:30:52,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:52,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 11:30:52,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:30:52,994 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 11:30:52,994 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:30:52,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182666875] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:30:52,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:30:52,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-12-14 11:30:52,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714957391] [2022-12-14 11:30:52,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:30:52,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:30:52,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:30:52,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:30:52,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:30:52,996 INFO L87 Difference]: Start difference. First operand 16305 states and 20537 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 0 states have call successors, (0), 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 11:30:53,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:30:53,599 INFO L93 Difference]: Finished difference Result 39616 states and 50325 transitions. [2022-12-14 11:30:53,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:30:53,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 0 states have call successors, (0), 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 178 [2022-12-14 11:30:53,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:30:53,623 INFO L225 Difference]: With dead ends: 39616 [2022-12-14 11:30:53,623 INFO L226 Difference]: Without dead ends: 23598 [2022-12-14 11:30:53,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 177 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 11:30:53,634 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 33 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:30:53,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 101 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 11:30:53,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23598 states. [2022-12-14 11:30:53,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23598 to 23598. [2022-12-14 11:30:53,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23598 states, 23597 states have (on average 1.2463024960800102) internal successors, (29409), 23597 states have internal predecessors, (29409), 0 states have call successors, (0), 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 11:30:53,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23598 states to 23598 states and 29409 transitions. [2022-12-14 11:30:53,931 INFO L78 Accepts]: Start accepts. Automaton has 23598 states and 29409 transitions. Word has length 178 [2022-12-14 11:30:53,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:30:53,931 INFO L495 AbstractCegarLoop]: Abstraction has 23598 states and 29409 transitions. [2022-12-14 11:30:53,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 0 states have call successors, (0), 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 11:30:53,931 INFO L276 IsEmpty]: Start isEmpty. Operand 23598 states and 29409 transitions. [2022-12-14 11:30:53,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-12-14 11:30:53,943 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:30:53,944 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2022-12-14 11:30:53,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 11:30:54,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-14 11:30:54,145 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:30:54,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:30:54,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1108934404, now seen corresponding path program 1 times [2022-12-14 11:30:54,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:30:54,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797198074] [2022-12-14 11:30:54,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:54,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:30:54,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:54,375 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 53 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 11:30:54,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:30:54,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797198074] [2022-12-14 11:30:54,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797198074] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:30:54,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437236722] [2022-12-14 11:30:54,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:54,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:30:54,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:30:54,377 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:30:54,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 11:30:54,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:54,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 11:30:54,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:30:54,631 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 11:30:54,631 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:30:54,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437236722] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:30:54,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:30:54,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 11:30:54,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702469947] [2022-12-14 11:30:54,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:30:54,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:30:54,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:30:54,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:30:54,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:30:54,633 INFO L87 Difference]: Start difference. First operand 23598 states and 29409 transitions. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 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 11:30:55,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:30:55,233 INFO L93 Difference]: Finished difference Result 54631 states and 68190 transitions. [2022-12-14 11:30:55,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:30:55,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 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 11:30:55,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:30:55,261 INFO L225 Difference]: With dead ends: 54631 [2022-12-14 11:30:55,262 INFO L226 Difference]: Without dead ends: 31463 [2022-12-14 11:30:55,275 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 11:30:55,276 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 12 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:30:55,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 143 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 11:30:55,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31463 states. [2022-12-14 11:30:55,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31463 to 29890. [2022-12-14 11:30:55,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29890 states, 29889 states have (on average 1.2485864364816488) internal successors, (37319), 29889 states have internal predecessors, (37319), 0 states have call successors, (0), 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 11:30:55,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29890 states to 29890 states and 37319 transitions. [2022-12-14 11:30:55,640 INFO L78 Accepts]: Start accepts. Automaton has 29890 states and 37319 transitions. Word has length 191 [2022-12-14 11:30:55,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:30:55,641 INFO L495 AbstractCegarLoop]: Abstraction has 29890 states and 37319 transitions. [2022-12-14 11:30:55,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 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 11:30:55,641 INFO L276 IsEmpty]: Start isEmpty. Operand 29890 states and 37319 transitions. [2022-12-14 11:30:55,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-12-14 11:30:55,656 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:30:55,657 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:30:55,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 11:30:55,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:30:55,857 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:30:55,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:30:55,858 INFO L85 PathProgramCache]: Analyzing trace with hash 519576958, now seen corresponding path program 1 times [2022-12-14 11:30:55,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:30:55,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876427627] [2022-12-14 11:30:55,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:55,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:30:55,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:56,103 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 61 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 11:30:56,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:30:56,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876427627] [2022-12-14 11:30:56,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876427627] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:30:56,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430552594] [2022-12-14 11:30:56,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:56,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:30:56,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:30:56,105 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:30:56,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 11:30:56,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:56,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 11:30:56,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:30:56,339 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 11:30:56,339 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:30:56,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430552594] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:30:56,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:30:56,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-12-14 11:30:56,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885312809] [2022-12-14 11:30:56,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:30:56,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:30:56,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:30:56,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:30:56,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:30:56,341 INFO L87 Difference]: Start difference. First operand 29890 states and 37319 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 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 11:30:56,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:30:56,786 INFO L93 Difference]: Finished difference Result 58921 states and 73575 transitions. [2022-12-14 11:30:56,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:30:56,787 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 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 199 [2022-12-14 11:30:56,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:30:56,813 INFO L225 Difference]: With dead ends: 58921 [2022-12-14 11:30:56,813 INFO L226 Difference]: Without dead ends: 29461 [2022-12-14 11:30:56,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 198 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 11:30:56,829 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 227 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:30:56,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 4 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 11:30:56,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29461 states. [2022-12-14 11:30:57,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29461 to 29461. [2022-12-14 11:30:57,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29461 states, 29460 states have (on average 1.2341819416157502) internal successors, (36359), 29460 states have internal predecessors, (36359), 0 states have call successors, (0), 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 11:30:57,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29461 states to 29461 states and 36359 transitions. [2022-12-14 11:30:57,277 INFO L78 Accepts]: Start accepts. Automaton has 29461 states and 36359 transitions. Word has length 199 [2022-12-14 11:30:57,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:30:57,277 INFO L495 AbstractCegarLoop]: Abstraction has 29461 states and 36359 transitions. [2022-12-14 11:30:57,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 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 11:30:57,278 INFO L276 IsEmpty]: Start isEmpty. Operand 29461 states and 36359 transitions. [2022-12-14 11:30:57,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-12-14 11:30:57,289 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:30:57,289 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, 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 11:30:57,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 11:30:57,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:30:57,491 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:30:57,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:30:57,493 INFO L85 PathProgramCache]: Analyzing trace with hash -928547869, now seen corresponding path program 1 times [2022-12-14 11:30:57,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:30:57,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067977478] [2022-12-14 11:30:57,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:57,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:30:57,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:57,747 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 71 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 11:30:57,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:30:57,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067977478] [2022-12-14 11:30:57,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067977478] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:30:57,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176263778] [2022-12-14 11:30:57,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:57,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:30:57,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:30:57,748 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:30:57,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 11:30:57,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:57,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 11:30:57,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:30:57,910 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:30:57,910 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:30:57,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176263778] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:30:57,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:30:57,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 11:30:57,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670999130] [2022-12-14 11:30:57,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:30:57,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:30:57,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:30:57,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:30:57,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:30:57,912 INFO L87 Difference]: Start difference. First operand 29461 states and 36359 transitions. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 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 11:30:58,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:30:58,552 INFO L93 Difference]: Finished difference Result 62782 states and 77522 transitions. [2022-12-14 11:30:58,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:30:58,553 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 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 209 [2022-12-14 11:30:58,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:30:58,581 INFO L225 Difference]: With dead ends: 62782 [2022-12-14 11:30:58,581 INFO L226 Difference]: Without dead ends: 33608 [2022-12-14 11:30:58,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 208 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 11:30:58,595 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 138 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:30:58,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 216 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 11:30:58,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33608 states. [2022-12-14 11:30:58,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33608 to 31749. [2022-12-14 11:30:58,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31749 states, 31748 states have (on average 1.1989731636638528) internal successors, (38065), 31748 states have internal predecessors, (38065), 0 states have call successors, (0), 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 11:30:58,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31749 states to 31749 states and 38065 transitions. [2022-12-14 11:30:58,938 INFO L78 Accepts]: Start accepts. Automaton has 31749 states and 38065 transitions. Word has length 209 [2022-12-14 11:30:58,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:30:58,938 INFO L495 AbstractCegarLoop]: Abstraction has 31749 states and 38065 transitions. [2022-12-14 11:30:58,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 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 11:30:58,938 INFO L276 IsEmpty]: Start isEmpty. Operand 31749 states and 38065 transitions. [2022-12-14 11:30:58,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-12-14 11:30:58,948 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:30:58,948 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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, 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] [2022-12-14 11:30:58,954 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 11:30:59,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:30:59,150 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:30:59,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:30:59,152 INFO L85 PathProgramCache]: Analyzing trace with hash -2142202077, now seen corresponding path program 1 times [2022-12-14 11:30:59,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:30:59,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964158643] [2022-12-14 11:30:59,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:59,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:30:59,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:59,352 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 11:30:59,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:30:59,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964158643] [2022-12-14 11:30:59,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964158643] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:30:59,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:30:59,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:30:59,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718006627] [2022-12-14 11:30:59,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:30:59,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:30:59,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:30:59,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:30:59,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:30:59,354 INFO L87 Difference]: Start difference. First operand 31749 states and 38065 transitions. Second operand has 4 states, 4 states have (on average 49.75) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 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 11:31:00,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:31:00,483 INFO L93 Difference]: Finished difference Result 113980 states and 136713 transitions. [2022-12-14 11:31:00,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:31:00,484 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.75) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 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 210 [2022-12-14 11:31:00,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:31:00,564 INFO L225 Difference]: With dead ends: 113980 [2022-12-14 11:31:00,564 INFO L226 Difference]: Without dead ends: 82661 [2022-12-14 11:31:00,589 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 11:31:00,589 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 598 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 11:31:00,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [598 Valid, 149 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 11:31:00,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82661 states. [2022-12-14 11:31:01,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82661 to 73648. [2022-12-14 11:31:01,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73648 states, 73647 states have (on average 1.2083452143332383) internal successors, (88991), 73647 states have internal predecessors, (88991), 0 states have call successors, (0), 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 11:31:01,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73648 states to 73648 states and 88991 transitions. [2022-12-14 11:31:01,555 INFO L78 Accepts]: Start accepts. Automaton has 73648 states and 88991 transitions. Word has length 210 [2022-12-14 11:31:01,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:31:01,555 INFO L495 AbstractCegarLoop]: Abstraction has 73648 states and 88991 transitions. [2022-12-14 11:31:01,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.75) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 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 11:31:01,555 INFO L276 IsEmpty]: Start isEmpty. Operand 73648 states and 88991 transitions. [2022-12-14 11:31:01,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-12-14 11:31:01,567 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:31:01,567 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:31:01,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 11:31:01,567 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:31:01,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:31:01,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1639857826, now seen corresponding path program 1 times [2022-12-14 11:31:01,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:31:01,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54881272] [2022-12-14 11:31:01,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:31:01,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:31:01,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:31:01,692 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 11:31:01,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:31:01,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54881272] [2022-12-14 11:31:01,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54881272] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:31:01,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:31:01,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 11:31:01,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525558987] [2022-12-14 11:31:01,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:31:01,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:31:01,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:31:01,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:31:01,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:31:01,695 INFO L87 Difference]: Start difference. First operand 73648 states and 88991 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 2 states have internal predecessors, (241), 0 states have call successors, (0), 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 11:31:02,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:31:02,498 INFO L93 Difference]: Finished difference Result 205069 states and 247540 transitions. [2022-12-14 11:31:02,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:31:02,499 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 2 states have internal predecessors, (241), 0 states have call successors, (0), 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 253 [2022-12-14 11:31:02,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:31:02,635 INFO L225 Difference]: With dead ends: 205069 [2022-12-14 11:31:02,635 INFO L226 Difference]: Without dead ends: 131565 [2022-12-14 11:31:02,680 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 11:31:02,680 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 148 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:31:02,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 309 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 11:31:02,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131565 states. [2022-12-14 11:31:04,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131565 to 131563. [2022-12-14 11:31:04,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131563 states, 131562 states have (on average 1.2056824919049574) internal successors, (158622), 131562 states have internal predecessors, (158622), 0 states have call successors, (0), 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 11:31:04,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131563 states to 131563 states and 158622 transitions. [2022-12-14 11:31:04,732 INFO L78 Accepts]: Start accepts. Automaton has 131563 states and 158622 transitions. Word has length 253 [2022-12-14 11:31:04,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:31:04,733 INFO L495 AbstractCegarLoop]: Abstraction has 131563 states and 158622 transitions. [2022-12-14 11:31:04,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 2 states have internal predecessors, (241), 0 states have call successors, (0), 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 11:31:04,733 INFO L276 IsEmpty]: Start isEmpty. Operand 131563 states and 158622 transitions. [2022-12-14 11:31:04,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-12-14 11:31:04,754 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:31:04,754 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 11:31:04,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 11:31:04,755 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:31:04,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:31:04,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1192849028, now seen corresponding path program 1 times [2022-12-14 11:31:04,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:31:04,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666080160] [2022-12-14 11:31:04,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:31:04,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:31:04,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:31:05,004 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 11:31:05,004 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:31:05,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666080160] [2022-12-14 11:31:05,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666080160] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:31:05,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:31:05,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:31:05,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643483512] [2022-12-14 11:31:05,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:31:05,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:31:05,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:31:05,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:31:05,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:31:05,006 INFO L87 Difference]: Start difference. First operand 131563 states and 158622 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 11:31:06,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:31:06,234 INFO L93 Difference]: Finished difference Result 281286 states and 340512 transitions. [2022-12-14 11:31:06,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:31:06,235 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 11:31:06,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:31:06,381 INFO L225 Difference]: With dead ends: 281286 [2022-12-14 11:31:06,381 INFO L226 Difference]: Without dead ends: 149867 [2022-12-14 11:31:06,427 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 11:31:06,427 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 9 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:31:06,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 24 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 11:31:06,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149867 states. [2022-12-14 11:31:08,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149867 to 144147. [2022-12-14 11:31:08,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144147 states, 144146 states have (on average 1.2117020243364367) internal successors, (174662), 144146 states have internal predecessors, (174662), 0 states have call successors, (0), 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 11:31:08,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144147 states to 144147 states and 174662 transitions. [2022-12-14 11:31:08,335 INFO L78 Accepts]: Start accepts. Automaton has 144147 states and 174662 transitions. Word has length 271 [2022-12-14 11:31:08,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:31:08,335 INFO L495 AbstractCegarLoop]: Abstraction has 144147 states and 174662 transitions. [2022-12-14 11:31:08,335 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 11:31:08,335 INFO L276 IsEmpty]: Start isEmpty. Operand 144147 states and 174662 transitions. [2022-12-14 11:31:08,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-12-14 11:31:08,365 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:31:08,366 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2022-12-14 11:31:08,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 11:31:08,366 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:31:08,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:31:08,366 INFO L85 PathProgramCache]: Analyzing trace with hash -473001607, now seen corresponding path program 2 times [2022-12-14 11:31:08,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:31:08,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745285037] [2022-12-14 11:31:08,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:31:08,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:31:08,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:31:08,881 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 134 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:31:08,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:31:08,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745285037] [2022-12-14 11:31:08,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745285037] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:31:08,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989296178] [2022-12-14 11:31:08,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:31:08,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:31:08,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:31:08,883 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:31:08,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 11:31:09,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 11:31:09,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:31:09,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 11:31:09,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:31:09,135 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 11:31:09,135 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:31:09,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989296178] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:31:09,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:31:09,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-12-14 11:31:09,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817514108] [2022-12-14 11:31:09,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:31:09,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:31:09,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:31:09,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:31:09,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:31:09,137 INFO L87 Difference]: Start difference. First operand 144147 states and 174662 transitions. Second operand has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:31:10,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:31:10,394 INFO L93 Difference]: Finished difference Result 295014 states and 358605 transitions. [2022-12-14 11:31:10,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:31:10,395 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 278 [2022-12-14 11:31:10,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:31:10,576 INFO L225 Difference]: With dead ends: 295014 [2022-12-14 11:31:10,577 INFO L226 Difference]: Without dead ends: 151011 [2022-12-14 11:31:10,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:31:10,657 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 40 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:31:10,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 22 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 11:31:10,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151011 states. [2022-12-14 11:31:12,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151011 to 148723. [2022-12-14 11:31:12,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148723 states, 148722 states have (on average 1.216154973709337) internal successors, (180869), 148722 states have internal predecessors, (180869), 0 states have call successors, (0), 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 11:31:12,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148723 states to 148723 states and 180869 transitions. [2022-12-14 11:31:12,640 INFO L78 Accepts]: Start accepts. Automaton has 148723 states and 180869 transitions. Word has length 278 [2022-12-14 11:31:12,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:31:12,640 INFO L495 AbstractCegarLoop]: Abstraction has 148723 states and 180869 transitions. [2022-12-14 11:31:12,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:31:12,641 INFO L276 IsEmpty]: Start isEmpty. Operand 148723 states and 180869 transitions. [2022-12-14 11:31:12,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2022-12-14 11:31:12,669 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:31:12,670 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 11:31:12,675 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 11:31:12,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:31:12,872 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:31:12,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:31:12,873 INFO L85 PathProgramCache]: Analyzing trace with hash -737505608, now seen corresponding path program 1 times [2022-12-14 11:31:12,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:31:12,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363106641] [2022-12-14 11:31:12,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:31:12,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:31:12,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:31:13,517 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 170 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:31:13,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:31:13,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363106641] [2022-12-14 11:31:13,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363106641] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:31:13,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500182394] [2022-12-14 11:31:13,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:31:13,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:31:13,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:31:13,518 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:31:13,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 11:31:13,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:31:13,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 11:31:13,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:31:13,945 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 170 proven. 49 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:31:13,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:31:14,135 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 170 proven. 49 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:31:14,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500182394] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:31:14,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [98442631] [2022-12-14 11:31:14,156 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2022-12-14 11:31:14,156 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:31:14,159 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:31:14,163 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:31:14,163 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:36:37,025 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 38 [2022-12-14 11:36:37,193 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 25072 conjuctions. This might take some time... [2022-12-14 11:36:38,931 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 656 conjuctions. [2022-12-14 11:36:39,022 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 38 [2022-12-14 11:36:39,236 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 25072 conjuctions. This might take some time... [2022-12-14 11:36:40,855 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 656 conjuctions. [2022-12-14 11:36:41,521 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 38 [2022-12-14 11:36:41,680 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 25072 conjuctions. This might take some time... [2022-12-14 11:36:43,358 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 656 conjuctions. [2022-12-14 11:37:18,288 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:37:40,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [98442631] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:37:40,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:37:40,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 3, 3] total 12 [2022-12-14 11:37:40,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147814890] [2022-12-14 11:37:40,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:37:40,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 11:37:40,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:37:40,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 11:37:40,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-12-14 11:37:40,812 INFO L87 Difference]: Start difference. First operand 148723 states and 180869 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 11:37:46,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:37:46,013 INFO L93 Difference]: Finished difference Result 297888 states and 362350 transitions. [2022-12-14 11:37:46,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 11:37:46,014 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 314 [2022-12-14 11:37:46,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:37:46,164 INFO L225 Difference]: With dead ends: 297888 [2022-12-14 11:37:46,164 INFO L226 Difference]: Without dead ends: 149309 [2022-12-14 11:37:46,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 947 GetRequests, 651 SyntacticMatches, 282 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1717 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-12-14 11:37:46,221 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 279 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1408 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:37:46,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 84 Invalid, 1501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1408 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-12-14 11:37:46,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149309 states. [2022-12-14 11:37:47,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149309 to 149131. [2022-12-14 11:37:47,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149131 states, 149130 states have (on average 1.2163481526185207) internal successors, (181394), 149130 states have internal predecessors, (181394), 0 states have call successors, (0), 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 11:37:47,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149131 states to 149131 states and 181394 transitions. [2022-12-14 11:37:47,937 INFO L78 Accepts]: Start accepts. Automaton has 149131 states and 181394 transitions. Word has length 314 [2022-12-14 11:37:47,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:37:47,937 INFO L495 AbstractCegarLoop]: Abstraction has 149131 states and 181394 transitions. [2022-12-14 11:37:47,937 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 11:37:47,937 INFO L276 IsEmpty]: Start isEmpty. Operand 149131 states and 181394 transitions. [2022-12-14 11:37:47,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2022-12-14 11:37:47,965 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:37:47,965 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 11:37:47,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 11:37:48,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 11:37:48,167 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:37:48,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:37:48,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1268958928, now seen corresponding path program 1 times [2022-12-14 11:37:48,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:37:48,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102820617] [2022-12-14 11:37:48,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:37:48,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:37:48,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:37:49,344 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 185 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 11:37:49,344 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:37:49,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102820617] [2022-12-14 11:37:49,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102820617] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:37:49,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:37:49,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:37:49,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46340466] [2022-12-14 11:37:49,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:37:49,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:37:49,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:37:49,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:37:49,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:37:49,346 INFO L87 Difference]: Start difference. First operand 149131 states and 181394 transitions. Second operand has 5 states, 5 states have (on average 55.0) internal successors, (275), 4 states have internal predecessors, (275), 0 states have call successors, (0), 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 11:37:50,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:37:50,973 INFO L93 Difference]: Finished difference Result 299188 states and 363788 transitions. [2022-12-14 11:37:50,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 11:37:50,973 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 55.0) internal successors, (275), 4 states have internal predecessors, (275), 0 states have call successors, (0), 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 317 [2022-12-14 11:37:50,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:37:51,126 INFO L225 Difference]: With dead ends: 299188 [2022-12-14 11:37:51,126 INFO L226 Difference]: Without dead ends: 150234 [2022-12-14 11:37:51,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:37:51,194 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 278 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 11:37:51,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 128 Invalid, 1169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1125 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 11:37:51,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150234 states. [2022-12-14 11:37:53,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150234 to 149560. [2022-12-14 11:37:53,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149560 states, 149559 states have (on average 1.2158479262364685) internal successors, (181841), 149559 states have internal predecessors, (181841), 0 states have call successors, (0), 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 11:37:53,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149560 states to 149560 states and 181841 transitions. [2022-12-14 11:37:53,341 INFO L78 Accepts]: Start accepts. Automaton has 149560 states and 181841 transitions. Word has length 317 [2022-12-14 11:37:53,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:37:53,341 INFO L495 AbstractCegarLoop]: Abstraction has 149560 states and 181841 transitions. [2022-12-14 11:37:53,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.0) internal successors, (275), 4 states have internal predecessors, (275), 0 states have call successors, (0), 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 11:37:53,341 INFO L276 IsEmpty]: Start isEmpty. Operand 149560 states and 181841 transitions. [2022-12-14 11:37:53,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2022-12-14 11:37:53,367 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:37:53,367 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 11:37:53,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-14 11:37:53,367 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:37:53,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:37:53,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1092322032, now seen corresponding path program 1 times [2022-12-14 11:37:53,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:37:53,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804283917] [2022-12-14 11:37:53,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:37:53,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:37:53,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:37:53,782 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 249 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:37:53,782 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:37:53,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804283917] [2022-12-14 11:37:53,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804283917] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:37:53,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:37:53,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:37:53,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147073361] [2022-12-14 11:37:53,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:37:53,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:37:53,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:37:53,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:37:53,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:37:53,784 INFO L87 Difference]: Start difference. First operand 149560 states and 181841 transitions. Second operand has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 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 11:37:55,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:37:55,085 INFO L93 Difference]: Finished difference Result 301561 states and 366753 transitions. [2022-12-14 11:37:55,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:37:55,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 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 329 [2022-12-14 11:37:55,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:37:55,254 INFO L225 Difference]: With dead ends: 301561 [2022-12-14 11:37:55,254 INFO L226 Difference]: Without dead ends: 152728 [2022-12-14 11:37:55,310 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 11:37:55,311 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 115 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:37:55,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 186 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 11:37:55,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152728 states. [2022-12-14 11:37:56,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152728 to 145721. [2022-12-14 11:37:57,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145721 states, 145720 states have (on average 1.1900631347790283) internal successors, (173416), 145720 states have internal predecessors, (173416), 0 states have call successors, (0), 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 11:37:57,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145721 states to 145721 states and 173416 transitions. [2022-12-14 11:37:57,275 INFO L78 Accepts]: Start accepts. Automaton has 145721 states and 173416 transitions. Word has length 329 [2022-12-14 11:37:57,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:37:57,275 INFO L495 AbstractCegarLoop]: Abstraction has 145721 states and 173416 transitions. [2022-12-14 11:37:57,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 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 11:37:57,276 INFO L276 IsEmpty]: Start isEmpty. Operand 145721 states and 173416 transitions. [2022-12-14 11:37:57,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2022-12-14 11:37:57,300 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:37:57,300 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 11:37:57,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-14 11:37:57,300 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:37:57,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:37:57,301 INFO L85 PathProgramCache]: Analyzing trace with hash 418263961, now seen corresponding path program 1 times [2022-12-14 11:37:57,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:37:57,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100052552] [2022-12-14 11:37:57,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:37:57,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:37:57,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:37:57,490 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 253 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 11:37:57,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:37:57,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100052552] [2022-12-14 11:37:57,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100052552] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:37:57,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:37:57,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:37:57,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792431439] [2022-12-14 11:37:57,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:37:57,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:37:57,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:37:57,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:37:57,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:37:57,492 INFO L87 Difference]: Start difference. First operand 145721 states and 173416 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 11:37:58,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:37:58,912 INFO L93 Difference]: Finished difference Result 285005 states and 337350 transitions. [2022-12-14 11:37:58,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:37:58,913 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 331 [2022-12-14 11:37:58,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:37:59,047 INFO L225 Difference]: With dead ends: 285005 [2022-12-14 11:37:59,047 INFO L226 Difference]: Without dead ends: 140430 [2022-12-14 11:37:59,090 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 11:37:59,090 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 135 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:37:59,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 227 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 11:37:59,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140430 states. [2022-12-14 11:38:00,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140430 to 137856. [2022-12-14 11:38:01,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137856 states, 137855 states have (on average 1.1690762032570454) internal successors, (161163), 137855 states have internal predecessors, (161163), 0 states have call successors, (0), 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 11:38:01,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137856 states to 137856 states and 161163 transitions. [2022-12-14 11:38:01,137 INFO L78 Accepts]: Start accepts. Automaton has 137856 states and 161163 transitions. Word has length 331 [2022-12-14 11:38:01,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:38:01,137 INFO L495 AbstractCegarLoop]: Abstraction has 137856 states and 161163 transitions. [2022-12-14 11:38:01,137 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 11:38:01,137 INFO L276 IsEmpty]: Start isEmpty. Operand 137856 states and 161163 transitions. [2022-12-14 11:38:01,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2022-12-14 11:38:01,161 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:38:01,162 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:38:01,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-14 11:38:01,162 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:38:01,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:38:01,162 INFO L85 PathProgramCache]: Analyzing trace with hash -612551857, now seen corresponding path program 1 times [2022-12-14 11:38:01,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:38:01,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060503118] [2022-12-14 11:38:01,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:38:01,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:38:01,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:38:01,533 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 200 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-12-14 11:38:01,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:38:01,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060503118] [2022-12-14 11:38:01,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060503118] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:38:01,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:38:01,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:38:01,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586697250] [2022-12-14 11:38:01,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:38:01,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:38:01,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:38:01,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:38:01,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:38:01,535 INFO L87 Difference]: Start difference. First operand 137856 states and 161163 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 11:38:03,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:38:03,192 INFO L93 Difference]: Finished difference Result 289438 states and 339108 transitions. [2022-12-14 11:38:03,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:38:03,193 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 335 [2022-12-14 11:38:03,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:38:03,337 INFO L225 Difference]: With dead ends: 289438 [2022-12-14 11:38:03,338 INFO L226 Difference]: Without dead ends: 152728 [2022-12-14 11:38:03,385 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 11:38:03,386 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 203 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 11:38:03,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 75 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 817 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 11:38:03,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152728 states. [2022-12-14 11:38:05,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152728 to 144291. [2022-12-14 11:38:05,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144291 states, 144290 states have (on average 1.1738027583339108) internal successors, (169368), 144290 states have internal predecessors, (169368), 0 states have call successors, (0), 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 11:38:05,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144291 states to 144291 states and 169368 transitions. [2022-12-14 11:38:05,676 INFO L78 Accepts]: Start accepts. Automaton has 144291 states and 169368 transitions. Word has length 335 [2022-12-14 11:38:05,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:38:05,676 INFO L495 AbstractCegarLoop]: Abstraction has 144291 states and 169368 transitions. [2022-12-14 11:38:05,676 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 11:38:05,676 INFO L276 IsEmpty]: Start isEmpty. Operand 144291 states and 169368 transitions. [2022-12-14 11:38:05,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2022-12-14 11:38:05,706 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:38:05,706 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, 3, 3, 3, 3, 3, 3, 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, 1, 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 11:38:05,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-14 11:38:05,706 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:38:05,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:38:05,706 INFO L85 PathProgramCache]: Analyzing trace with hash -147467778, now seen corresponding path program 1 times [2022-12-14 11:38:05,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:38:05,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653972188] [2022-12-14 11:38:05,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:38:05,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:38:05,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:38:06,150 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 102 proven. 6 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-12-14 11:38:06,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:38:06,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653972188] [2022-12-14 11:38:06,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653972188] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:38:06,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436829738] [2022-12-14 11:38:06,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:38:06,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:38:06,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:38:06,152 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:38:06,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 11:38:06,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:38:06,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 11:38:06,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:38:06,429 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-12-14 11:38:06,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:38:06,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436829738] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:38:06,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:38:06,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 11:38:06,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644405169] [2022-12-14 11:38:06,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:38:06,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:38:06,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:38:06,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:38:06,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:38:06,432 INFO L87 Difference]: Start difference. First operand 144291 states and 169368 transitions. Second operand has 4 states, 4 states have (on average 45.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 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 11:38:08,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:38:08,542 INFO L93 Difference]: Finished difference Result 420714 states and 492506 transitions. [2022-12-14 11:38:08,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:38:08,543 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 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 360 [2022-12-14 11:38:08,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:38:08,857 INFO L225 Difference]: With dead ends: 420714 [2022-12-14 11:38:08,858 INFO L226 Difference]: Without dead ends: 277569 [2022-12-14 11:38:08,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:38:08,924 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 358 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:38:08,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 216 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 11:38:09,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277569 states. [2022-12-14 11:38:12,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277569 to 277567. [2022-12-14 11:38:12,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277567 states, 277566 states have (on average 1.1671530374757715) internal successors, (323962), 277566 states have internal predecessors, (323962), 0 states have call successors, (0), 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 11:38:12,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277567 states to 277567 states and 323962 transitions. [2022-12-14 11:38:12,899 INFO L78 Accepts]: Start accepts. Automaton has 277567 states and 323962 transitions. Word has length 360 [2022-12-14 11:38:12,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:38:12,899 INFO L495 AbstractCegarLoop]: Abstraction has 277567 states and 323962 transitions. [2022-12-14 11:38:12,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 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 11:38:12,899 INFO L276 IsEmpty]: Start isEmpty. Operand 277567 states and 323962 transitions. [2022-12-14 11:38:12,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2022-12-14 11:38:12,944 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:38:12,944 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:38:12,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 11:38:13,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:38:13,147 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:38:13,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:38:13,148 INFO L85 PathProgramCache]: Analyzing trace with hash 404864626, now seen corresponding path program 1 times [2022-12-14 11:38:13,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:38:13,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394560530] [2022-12-14 11:38:13,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:38:13,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:38:13,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:38:13,354 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 342 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 11:38:13,355 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:38:13,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394560530] [2022-12-14 11:38:13,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394560530] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:38:13,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:38:13,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:38:13,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226102658] [2022-12-14 11:38:13,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:38:13,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:38:13,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:38:13,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:38:13,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:38:13,357 INFO L87 Difference]: Start difference. First operand 277567 states and 323962 transitions. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 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 11:38:15,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:38:15,646 INFO L93 Difference]: Finished difference Result 570004 states and 667353 transitions. [2022-12-14 11:38:15,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:38:15,646 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 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 382 [2022-12-14 11:38:15,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:38:15,984 INFO L225 Difference]: With dead ends: 570004 [2022-12-14 11:38:15,984 INFO L226 Difference]: Without dead ends: 293583 [2022-12-14 11:38:16,084 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 11:38:16,085 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 110 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:38:16,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 234 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 11:38:16,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293583 states. [2022-12-14 11:38:19,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293583 to 281285. [2022-12-14 11:38:19,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281285 states, 281284 states have (on average 1.1497418978683467) internal successors, (323404), 281284 states have internal predecessors, (323404), 0 states have call successors, (0), 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 11:38:20,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281285 states to 281285 states and 323404 transitions. [2022-12-14 11:38:20,102 INFO L78 Accepts]: Start accepts. Automaton has 281285 states and 323404 transitions. Word has length 382 [2022-12-14 11:38:20,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:38:20,102 INFO L495 AbstractCegarLoop]: Abstraction has 281285 states and 323404 transitions. [2022-12-14 11:38:20,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 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 11:38:20,102 INFO L276 IsEmpty]: Start isEmpty. Operand 281285 states and 323404 transitions. [2022-12-14 11:38:20,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2022-12-14 11:38:20,147 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:38:20,148 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:38:20,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-14 11:38:20,148 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:38:20,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:38:20,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1379030616, now seen corresponding path program 1 times [2022-12-14 11:38:20,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:38:20,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769682791] [2022-12-14 11:38:20,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:38:20,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:38:20,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:38:20,725 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 262 proven. 9 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-12-14 11:38:20,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:38:20,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769682791] [2022-12-14 11:38:20,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769682791] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:38:20,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741075825] [2022-12-14 11:38:20,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:38:20,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:38:20,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:38:20,726 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:38:20,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 11:38:20,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:38:20,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 11:38:20,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:38:20,957 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 269 proven. 0 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-12-14 11:38:20,957 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:38:20,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741075825] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:38:20,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:38:20,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-12-14 11:38:20,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925837949] [2022-12-14 11:38:20,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:38:20,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:38:20,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:38:20,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:38:20,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:38:20,959 INFO L87 Difference]: Start difference. First operand 281285 states and 323404 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 11:38:22,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:38:22,883 INFO L93 Difference]: Finished difference Result 560852 states and 645271 transitions. [2022-12-14 11:38:22,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:38:22,883 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 386 [2022-12-14 11:38:22,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:38:23,359 INFO L225 Difference]: With dead ends: 560852 [2022-12-14 11:38:23,359 INFO L226 Difference]: Without dead ends: 280427 [2022-12-14 11:38:23,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:38:23,461 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 141 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:38:23,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 250 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 11:38:23,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280427 states. [2022-12-14 11:38:26,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280427 to 278711. [2022-12-14 11:38:26,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278711 states, 278710 states have (on average 1.1464999461806178) internal successors, (319541), 278710 states have internal predecessors, (319541), 0 states have call successors, (0), 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 11:38:27,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278711 states to 278711 states and 319541 transitions. [2022-12-14 11:38:27,427 INFO L78 Accepts]: Start accepts. Automaton has 278711 states and 319541 transitions. Word has length 386 [2022-12-14 11:38:27,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:38:27,428 INFO L495 AbstractCegarLoop]: Abstraction has 278711 states and 319541 transitions. [2022-12-14 11:38:27,428 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 11:38:27,428 INFO L276 IsEmpty]: Start isEmpty. Operand 278711 states and 319541 transitions. [2022-12-14 11:38:27,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2022-12-14 11:38:27,490 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:38:27,490 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 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 11:38:27,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 11:38:27,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:38:27,693 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:38:27,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:38:27,694 INFO L85 PathProgramCache]: Analyzing trace with hash -713546889, now seen corresponding path program 1 times [2022-12-14 11:38:27,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:38:27,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412192171] [2022-12-14 11:38:27,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:38:27,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:38:27,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:38:28,009 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 317 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-12-14 11:38:28,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:38:28,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412192171] [2022-12-14 11:38:28,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412192171] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:38:28,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:38:28,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:38:28,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801544920] [2022-12-14 11:38:28,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:38:28,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:38:28,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:38:28,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:38:28,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:38:28,011 INFO L87 Difference]: Start difference. First operand 278711 states and 319541 transitions. Second operand has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:38:30,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:38:30,478 INFO L93 Difference]: Finished difference Result 577297 states and 662411 transitions. [2022-12-14 11:38:30,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:38:30,479 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 388 [2022-12-14 11:38:30,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:38:30,840 INFO L225 Difference]: With dead ends: 577297 [2022-12-14 11:38:30,840 INFO L226 Difference]: Without dead ends: 299589 [2022-12-14 11:38:31,045 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 11:38:31,045 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 143 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 11:38:31,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 103 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 11:38:31,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299589 states. [2022-12-14 11:38:34,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299589 to 278425. [2022-12-14 11:38:34,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278425 states, 278424 states have (on average 1.1315583426716087) internal successors, (315053), 278424 states have internal predecessors, (315053), 0 states have call successors, (0), 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 11:38:35,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278425 states to 278425 states and 315053 transitions. [2022-12-14 11:38:35,175 INFO L78 Accepts]: Start accepts. Automaton has 278425 states and 315053 transitions. Word has length 388 [2022-12-14 11:38:35,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:38:35,175 INFO L495 AbstractCegarLoop]: Abstraction has 278425 states and 315053 transitions. [2022-12-14 11:38:35,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:38:35,175 INFO L276 IsEmpty]: Start isEmpty. Operand 278425 states and 315053 transitions. [2022-12-14 11:38:35,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2022-12-14 11:38:35,229 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:38:35,229 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 11:38:35,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-14 11:38:35,229 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:38:35,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:38:35,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1000980799, now seen corresponding path program 1 times [2022-12-14 11:38:35,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:38:35,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817751977] [2022-12-14 11:38:35,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:38:35,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:38:35,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:38:36,059 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 203 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-12-14 11:38:36,059 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:38:36,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817751977] [2022-12-14 11:38:36,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817751977] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:38:36,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:38:36,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 11:38:36,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437076287] [2022-12-14 11:38:36,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:38:36,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:38:36,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:38:36,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:38:36,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:38:36,061 INFO L87 Difference]: Start difference. First operand 278425 states and 315053 transitions. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 states have internal predecessors, (219), 0 states have call successors, (0), 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 11:38:37,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:38:37,921 INFO L93 Difference]: Finished difference Result 556276 states and 629452 transitions. [2022-12-14 11:38:37,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:38:37,921 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 states have internal predecessors, (219), 0 states have call successors, (0), 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 399 [2022-12-14 11:38:37,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:38:38,223 INFO L225 Difference]: With dead ends: 556276 [2022-12-14 11:38:38,223 INFO L226 Difference]: Without dead ends: 278854 [2022-12-14 11:38:38,323 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 11:38:38,324 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 72 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:38:38,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 105 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 11:38:38,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278854 states. [2022-12-14 11:38:42,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278854 to 278711. [2022-12-14 11:38:42,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278711 states, 278710 states have (on average 1.1315166301890853) internal successors, (315365), 278710 states have internal predecessors, (315365), 0 states have call successors, (0), 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 11:38:43,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278711 states to 278711 states and 315365 transitions. [2022-12-14 11:38:43,057 INFO L78 Accepts]: Start accepts. Automaton has 278711 states and 315365 transitions. Word has length 399 [2022-12-14 11:38:43,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:38:43,057 INFO L495 AbstractCegarLoop]: Abstraction has 278711 states and 315365 transitions. [2022-12-14 11:38:43,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 states have internal predecessors, (219), 0 states have call successors, (0), 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 11:38:43,057 INFO L276 IsEmpty]: Start isEmpty. Operand 278711 states and 315365 transitions. [2022-12-14 11:38:43,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2022-12-14 11:38:43,117 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:38:43,118 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, 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, 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] [2022-12-14 11:38:43,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-12-14 11:38:43,118 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:38:43,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:38:43,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1351173496, now seen corresponding path program 1 times [2022-12-14 11:38:43,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:38:43,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027852194] [2022-12-14 11:38:43,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:38:43,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:38:43,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:38:43,803 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 500 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-12-14 11:38:43,803 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:38:43,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027852194] [2022-12-14 11:38:43,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027852194] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:38:43,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:38:43,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:38:43,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110430931] [2022-12-14 11:38:43,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:38:43,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:38:43,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:38:43,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:38:43,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:38:43,805 INFO L87 Difference]: Start difference. First operand 278711 states and 315365 transitions. Second operand has 4 states, 4 states have (on average 97.75) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 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 11:38:45,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:38:45,903 INFO L93 Difference]: Finished difference Result 568431 states and 643076 transitions. [2022-12-14 11:38:45,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:38:45,904 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 97.75) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 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 453 [2022-12-14 11:38:45,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:38:46,222 INFO L225 Difference]: With dead ends: 568431 [2022-12-14 11:38:46,222 INFO L226 Difference]: Without dead ends: 291009 [2022-12-14 11:38:46,323 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 11:38:46,323 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 95 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:38:46,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 11 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 11:38:46,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291009 states. [2022-12-14 11:38:49,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291009 to 278568. [2022-12-14 11:38:50,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278568 states, 278567 states have (on average 1.1217732179332083) internal successors, (312489), 278567 states have internal predecessors, (312489), 0 states have call successors, (0), 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 11:38:50,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278568 states to 278568 states and 312489 transitions. [2022-12-14 11:38:50,347 INFO L78 Accepts]: Start accepts. Automaton has 278568 states and 312489 transitions. Word has length 453 [2022-12-14 11:38:50,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:38:50,348 INFO L495 AbstractCegarLoop]: Abstraction has 278568 states and 312489 transitions. [2022-12-14 11:38:50,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 97.75) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 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 11:38:50,348 INFO L276 IsEmpty]: Start isEmpty. Operand 278568 states and 312489 transitions. [2022-12-14 11:38:50,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2022-12-14 11:38:50,406 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:38:50,407 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 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 11:38:50,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-12-14 11:38:50,407 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:38:50,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:38:50,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1712986450, now seen corresponding path program 1 times [2022-12-14 11:38:50,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:38:50,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542700477] [2022-12-14 11:38:50,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:38:50,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:38:50,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:38:51,899 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 455 proven. 66 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2022-12-14 11:38:51,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:38:51,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542700477] [2022-12-14 11:38:51,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542700477] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:38:51,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646304103] [2022-12-14 11:38:51,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:38:51,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:38:51,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:38:51,901 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:38:51,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 11:38:52,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:38:52,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 11:38:52,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:38:52,269 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 439 proven. 0 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2022-12-14 11:38:52,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:38:52,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646304103] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:38:52,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:38:52,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2022-12-14 11:38:52,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36208881] [2022-12-14 11:38:52,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:38:52,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:38:52,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:38:52,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:38:52,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:38:52,270 INFO L87 Difference]: Start difference. First operand 278568 states and 312489 transitions. Second operand has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 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 11:38:54,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:38:54,235 INFO L93 Difference]: Finished difference Result 550699 states and 617192 transitions. [2022-12-14 11:38:54,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:38:54,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 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 455 [2022-12-14 11:38:54,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:38:54,554 INFO L225 Difference]: With dead ends: 550699 [2022-12-14 11:38:54,554 INFO L226 Difference]: Without dead ends: 273420 [2022-12-14 11:38:54,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:38:54,647 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 134 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:38:54,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 198 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 11:38:54,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273420 states. [2022-12-14 11:38:58,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273420 to 273420. [2022-12-14 11:38:58,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273420 states, 273419 states have (on average 1.118323891170694) internal successors, (305771), 273419 states have internal predecessors, (305771), 0 states have call successors, (0), 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 11:38:58,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273420 states to 273420 states and 305771 transitions. [2022-12-14 11:38:58,815 INFO L78 Accepts]: Start accepts. Automaton has 273420 states and 305771 transitions. Word has length 455 [2022-12-14 11:38:58,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:38:58,815 INFO L495 AbstractCegarLoop]: Abstraction has 273420 states and 305771 transitions. [2022-12-14 11:38:58,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 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 11:38:58,816 INFO L276 IsEmpty]: Start isEmpty. Operand 273420 states and 305771 transitions. [2022-12-14 11:38:58,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2022-12-14 11:38:58,868 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:38:58,869 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 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 11:38:58,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 11:38:59,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-14 11:38:59,071 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:38:59,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:38:59,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1754518920, now seen corresponding path program 1 times [2022-12-14 11:38:59,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:38:59,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251764835] [2022-12-14 11:38:59,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:38:59,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:38:59,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:38:59,574 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 519 proven. 18 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2022-12-14 11:38:59,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:38:59,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251764835] [2022-12-14 11:38:59,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251764835] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:38:59,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883186] [2022-12-14 11:38:59,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:38:59,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:38:59,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:38:59,575 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:38:59,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 11:38:59,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:38:59,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 11:38:59,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:38:59,952 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 561 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2022-12-14 11:38:59,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:38:59,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883186] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:38:59,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:38:59,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2022-12-14 11:38:59,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189666439] [2022-12-14 11:38:59,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:38:59,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:38:59,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:38:59,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:38:59,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:38:59,954 INFO L87 Difference]: Start difference. First operand 273420 states and 305771 transitions. Second operand has 4 states, 4 states have (on average 83.0) internal successors, (332), 4 states have internal predecessors, (332), 0 states have call successors, (0), 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 11:39:02,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:39:02,755 INFO L93 Difference]: Finished difference Result 620197 states and 695545 transitions. [2022-12-14 11:39:02,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:39:02,756 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 83.0) internal successors, (332), 4 states have internal predecessors, (332), 0 states have call successors, (0), 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 459 [2022-12-14 11:39:02,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:39:03,104 INFO L225 Difference]: With dead ends: 620197 [2022-12-14 11:39:03,104 INFO L226 Difference]: Without dead ends: 348066 [2022-12-14 11:39:03,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 457 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:39:03,164 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 408 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 11:39:03,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 215 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 11:39:03,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348066 states. [2022-12-14 11:39:07,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348066 to 341345. [2022-12-14 11:39:07,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341345 states, 341344 states have (on average 1.1195187259773132) internal successors, (382141), 341344 states have internal predecessors, (382141), 0 states have call successors, (0), 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 11:39:07,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341345 states to 341345 states and 382141 transitions. [2022-12-14 11:39:07,440 INFO L78 Accepts]: Start accepts. Automaton has 341345 states and 382141 transitions. Word has length 459 [2022-12-14 11:39:07,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:39:07,440 INFO L495 AbstractCegarLoop]: Abstraction has 341345 states and 382141 transitions. [2022-12-14 11:39:07,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.0) internal successors, (332), 4 states have internal predecessors, (332), 0 states have call successors, (0), 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 11:39:07,440 INFO L276 IsEmpty]: Start isEmpty. Operand 341345 states and 382141 transitions. [2022-12-14 11:39:07,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2022-12-14 11:39:07,500 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:39:07,501 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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] [2022-12-14 11:39:07,506 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 11:39:07,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-14 11:39:07,703 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:39:07,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:39:07,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1404267186, now seen corresponding path program 1 times [2022-12-14 11:39:07,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:39:07,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008675349] [2022-12-14 11:39:07,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:39:07,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:39:07,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:39:08,356 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 361 proven. 33 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-12-14 11:39:08,356 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:39:08,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008675349] [2022-12-14 11:39:08,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008675349] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:39:08,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279128616] [2022-12-14 11:39:08,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:39:08,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:39:08,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:39:08,357 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:39:08,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 11:39:08,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:39:08,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 11:39:08,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:39:08,753 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 394 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-12-14 11:39:08,753 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:39:08,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279128616] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:39:08,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:39:08,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-12-14 11:39:08,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140663860] [2022-12-14 11:39:08,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:39:08,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:39:08,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:39:08,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:39:08,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:39:08,756 INFO L87 Difference]: Start difference. First operand 341345 states and 382141 transitions. Second operand has 4 states, 4 states have (on average 70.25) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 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 11:39:12,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:39:12,095 INFO L93 Difference]: Finished difference Result 851859 states and 950549 transitions. [2022-12-14 11:39:12,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:39:12,095 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 70.25) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 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 461 [2022-12-14 11:39:12,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:39:12,678 INFO L225 Difference]: With dead ends: 851859 [2022-12-14 11:39:12,678 INFO L226 Difference]: Without dead ends: 511374 [2022-12-14 11:39:12,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 460 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 11:39:12,929 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 352 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 11:39:12,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 209 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 11:39:13,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511374 states. [2022-12-14 11:39:18,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511374 to 467015. [2022-12-14 11:39:19,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467015 states, 467014 states have (on average 1.1185360610174426) internal successors, (522372), 467014 states have internal predecessors, (522372), 0 states have call successors, (0), 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 11:39:19,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467015 states to 467015 states and 522372 transitions. [2022-12-14 11:39:19,645 INFO L78 Accepts]: Start accepts. Automaton has 467015 states and 522372 transitions. Word has length 461 [2022-12-14 11:39:19,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:39:19,645 INFO L495 AbstractCegarLoop]: Abstraction has 467015 states and 522372 transitions. [2022-12-14 11:39:19,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.25) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 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 11:39:19,646 INFO L276 IsEmpty]: Start isEmpty. Operand 467015 states and 522372 transitions. [2022-12-14 11:39:19,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2022-12-14 11:39:19,926 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:39:19,926 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:39:19,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 11:39:20,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:39:20,127 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:39:20,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:39:20,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1759885580, now seen corresponding path program 1 times [2022-12-14 11:39:20,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:39:20,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088891667] [2022-12-14 11:39:20,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:39:20,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:39:20,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:39:21,365 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 461 proven. 166 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 11:39:21,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:39:21,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088891667] [2022-12-14 11:39:21,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088891667] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:39:21,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892515427] [2022-12-14 11:39:21,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:39:21,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:39:21,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:39:21,366 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:39:21,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fc6295f-a131-43ef-b77b-ae5531116503/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 11:39:21,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:39:21,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 11:39:21,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:39:21,867 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 679 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:39:21,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:39:21,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892515427] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:39:21,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:39:21,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2022-12-14 11:39:21,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9454195] [2022-12-14 11:39:21,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:39:21,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:39:21,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:39:21,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:39:21,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:39:21,869 INFO L87 Difference]: Start difference. First operand 467015 states and 522372 transitions. Second operand has 5 states, 5 states have (on average 96.4) internal successors, (482), 5 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)